diff --git a/.devcontainer/devcontainer.json b/.devcontainer/devcontainer.json
index 2635abfb..2cf097c2 100644
--- a/.devcontainer/devcontainer.json
+++ b/.devcontainer/devcontainer.json
@@ -1,53 +1,41 @@
{
- "name": "Existing Dockerfile",
-
- // Sets the run context to one level up instead of the .devcontainer folder.
+ "name": "opencascade.js (V8)",
"context": "..",
-
- // Update the 'dockerFile' property if you aren't using the standard 'Dockerfile' filename.
"dockerFile": "../Dockerfile",
- // Set *default* container specific settings.json values on container create.
- "settings": {
- "terminal.integrated.shell.linux": null
+ "customizations": {
+ "vscode": {
+ "settings": {
+ "python.defaultInterpreterPath": "/opencascade.js/.venv/bin/python",
+ "python.analysis.extraPaths": ["/opencascade.js/src"],
+ "terminal.integrated.defaultProfile.linux": "bash"
+ },
+ "extensions": [
+ "ms-vscode.cpptools",
+ "ms-vscode.cpptools-extension-pack",
+ "ms-python.python",
+ "ms-python.vscode-pylance",
+ "nrwl.angular-console",
+ "dtsvet.vscode-wasm",
+ "eamodio.gitlens"
+ ]
+ }
},
- // Add the IDs of extensions you want installed when the container is created.
- "extensions": [
- "ms-vscode.cpptools",
- "ms-vscode.cpptools-extension-pack",
- "mhutchie.git-graph",
- "eamodio.gitlens",
- "ms-python.python",
- "dtsvet.vscode-wasm"
- ],
-
"mounts": [
"source=${localWorkspaceFolder}/src,target=/opencascade.js/src,type=bind,consistency=cached",
- "source=${localWorkspaceFolder}/build,target=/opencascade.js/build,type=bind,consistency=cached",
- "source=${localWorkspaceFolder}/builds,target=/opencascade.js/builds,type=bind,consistency=cached",
- "source=${localWorkspaceFolder}/dist,target=/opencascade.js/dist,type=bind,consistency=cached",
- "source=${localWorkspaceFolder}/test,target=/opencascade.js/test,type=bind,consistency=cached"
- // "source=${localWorkspaceFolder}/occt-src,target=/occt/occt-0dc2c37/src,type=bind,consistency=cached",
+ "source=${localWorkspaceFolder}/build-configs,target=/opencascade.js/build-configs,type=bind,consistency=cached",
+ "source=${localWorkspaceFolder}/tests,target=/opencascade.js/tests,type=bind,consistency=cached",
+ "source=${localWorkspaceFolder}/scripts,target=/opencascade.js/scripts,type=bind,consistency=cached",
+ "source=${localWorkspaceFolder}/build-wasm.sh,target=/opencascade.js/build-wasm.sh,type=bind,consistency=cached",
+ "source=${localWorkspaceFolder}/bindgen-filters.yaml,target=/opencascade.js/bindgen-filters.yaml,type=bind,consistency=cached",
+ "source=${localWorkspaceFolder}/DEPS.json,target=/opencascade.js/DEPS.json,type=bind,consistency=cached"
],
- // Use 'forwardPorts' to make a list of ports inside the container available locally.
- // "forwardPorts": [],
-
- // Uncomment the next line to run commands after the container is created - for example installing curl.
- // "postCreateCommand": "apt-get update && apt-get install -y curl",
+ "remoteEnv": {
+ "OCJS_CONFIG": "single-threaded"
+ }
- // Uncomment when using a ptrace-based debugger like C++, Go, and Rust
+ // Uncomment when using a ptrace-based debugger like C++, Go, or Rust.
// "runArgs": [ "--cap-add=SYS_PTRACE", "--security-opt", "seccomp=unconfined" ],
-
- // Uncomment to use the Docker CLI from inside the container. See https://aka.ms/vscode-remote/samples/docker-from-docker.
- // "mounts": [ "source=/var/run/docker.sock,target=/var/run/docker.sock,type=bind" ],
-
- // Uncomment to connect as a non-root user if you've added one. See https://aka.ms/vscode-remote/containers/non-root.
- // "remoteUser": "vscode"
-
- "build": {
- "cacheFrom": "donalffons/opencascade.js:staging-master",
- "target": "custom-build-image"
- }
}
diff --git a/.dockerignore b/.dockerignore
index d3012846..a3ef6d80 100644
--- a/.dockerignore
+++ b/.dockerignore
@@ -1,5 +1,46 @@
+# Version control and editor metadata
+.git
+.github
+.gitignore
+.gitattributes
+.vscode
+.cursor
+.devcontainer
+
+# Nx / pnpm caches and workspace metadata
+.nx
+node_modules
+
+# Python venv and bytecode
+.venv
+**/__pycache__/
+*.pyc
+
+# Build outputs and host-side dependency checkouts
+deps/
+build/
dist/
-node_modules/
-occt-src/
-**/.git
+docker-e2e-output/
+docs-site/
+website/
+tarballs/
+tmp/
+tools/
+
+# Prebuilt host-side artifacts left next to YAML configs
+# (the docker build re-creates these inside the image; shipping them as
+# build context bloats the build-configs/ COPY layer by ~63 MB).
+build-configs/opencascade_full.js
+build-configs/opencascade_full.d.ts
+build-configs/opencascade_full.wasm
+build-configs/opencascade_full.js.symbols
+build-configs/opencascade_full.provenance.json
+build-configs/provenance.json
+
+# Legacy / pre-V8 directories (excluded so the build context stays minimal)
test/
+occt-src/
+
+# Packaging artifacts and logs
+*.tgz
+*.log
diff --git a/.github/workflows/docker.yml b/.github/workflows/docker.yml
new file mode 100644
index 00000000..0b0fbf42
--- /dev/null
+++ b/.github/workflows/docker.yml
@@ -0,0 +1,566 @@
+name: docker
+
+# Production-readiness blueprint reference:
+# docs/research/ocjs-docker-production-readiness-blueprint.md
+#
+# Two responsibilities:
+#
+# 1. **Branch DAG** (every push to main/master/occt-v8-*):
+# For each published stage (final-single, final-multi, bindgen-base):
+# amd64 build (with --load) → e2e gate (20-min warm-link budget) → publish
+# :branch-* / :*-branch-* → keyless cosign sign.
+# branch-publish starts after setup only (parallel with docker-smoke).
+# Pre-publish e2e on single/multi is the publish gate (R13); smoke is
+# informational on branch pushes and remains the PR gate for link-filter-poc.
+# Branch builds are amd64-only by design (R12) — Apple Silicon reviewers
+# pay the Rosetta tax on branch tags; release tags carry the full
+# multi-arch manifest list.
+#
+# 2. **Release DAG** (annotated git tags matching `v*`):
+# For each (stage, arch) ∈ {final-single, final-multi, bindgen-base} ×
+# {amd64, arm64}:
+# build with `outputs=type=image,push-by-digest=true` → smoke → e2e gate
+# (20-min warm-link budget) → upload digest.
+# Then for each stage:
+# manifest-list assembly → keyless cosign sign of the manifest-list
+# digest (one signature verifies regardless of which arch the consumer
+# pulls).
+# Post-publish smoke pulls the manifest list and re-runs the link-filter
+# PoC to confirm the published artefact is functional.
+#
+# Cache strategy (R5): registry-backed cache (`type=registry,ref=…:buildcache-
+# -`) — GHA cache backend's 10 GB limit cannot accommodate the
+# scopes we need (~40 GB combined). Scopes are partitioned by arch + stage so
+# the two architectures and three stages don't poison each other's cache hits.
+# cache-from on all build steps (warm reads); cache-to only on push steps after
+# the e2e gate passes (trusted writes). PR smoke has cache-from only — no PR
+# can poison buildcache-* tags. GHCR package must grant this repo Write under
+# Manage Actions access (packages: write in YAML is not sufficient alone).
+#
+# Disk: free-disk-space (`jlumbroso/free-disk-space@main`) reclaims ~30-40 GB
+# on the GHA runner before BuildKit starts — without it, the compiled-*
+# stages OOM the runner's 14 GB ext4 partition during link.
+
+on:
+ push:
+ branches:
+ - main
+ - master
+ - 'occt-v8-*'
+ tags:
+ - 'v*'
+ pull_request:
+ branches:
+ - main
+ - master
+ - 'occt-v8-*'
+ workflow_dispatch:
+
+permissions:
+ contents: read
+
+env:
+ REGISTRY_IMAGE: ghcr.io/taucad/opencascade.js
+ # GitHub Actions Node 20 deprecation (2026-09): opt into Node 24 for action runtimes.
+ FORCE_JAVASCRIPT_ACTIONS_TO_NODE24: true
+
+jobs:
+ # ───────────────────────────────────────────────────────────────────────────
+ # Setup
+ # ───────────────────────────────────────────────────────────────────────────
+ setup:
+ name: docker · setup · derive branch slug + DAG selector
+ runs-on: ubuntu-latest
+ outputs:
+ is_release: ${{ steps.derive.outputs.is_release }}
+ is_branch_push: ${{ steps.derive.outputs.is_branch_push }}
+ is_pr: ${{ steps.derive.outputs.is_pr }}
+ branch_slug: ${{ steps.derive.outputs.branch_slug }}
+ steps:
+ - name: Derive DAG selector + sanitized branch slug
+ id: derive
+ env:
+ REF: ${{ github.ref }}
+ REF_NAME: ${{ github.ref_name }}
+ EVENT: ${{ github.event_name }}
+ run: |
+ set -euo pipefail
+ if [[ "$REF" == refs/tags/v* ]]; then
+ echo "is_release=true" >> "$GITHUB_OUTPUT"
+ echo "is_branch_push=false" >> "$GITHUB_OUTPUT"
+ echo "is_pr=false" >> "$GITHUB_OUTPUT"
+ elif [[ "$EVENT" == "pull_request" ]]; then
+ echo "is_release=false" >> "$GITHUB_OUTPUT"
+ echo "is_branch_push=false" >> "$GITHUB_OUTPUT"
+ echo "is_pr=true" >> "$GITHUB_OUTPUT"
+ else
+ echo "is_release=false" >> "$GITHUB_OUTPUT"
+ echo "is_branch_push=true" >> "$GITHUB_OUTPUT"
+ echo "is_pr=false" >> "$GITHUB_OUTPUT"
+ fi
+ # GHCR tags cannot contain '/' — replace with '-' (e.g. occt-v8-2026-05 stays unchanged;
+ # feature/x-y becomes feature-x-y).
+ slug=$(printf '%s' "$REF_NAME" | tr '/' '-')
+ echo "branch_slug=$slug" >> "$GITHUB_OUTPUT"
+
+ # ───────────────────────────────────────────────────────────────────────────
+ # Smoke (PR + branch push) — link-filter-poc trim gate + YAML validate.
+ # Runs parallel with branch-publish on branch pushes (no needs edge).
+ # On pull_request, smoke is the sole docker compile gate before merge.
+ # ───────────────────────────────────────────────────────────────────────────
+ docker-smoke:
+ name: docker · smoke · build + link-filter-poc
+ needs: setup
+ runs-on: ubuntu-latest
+ timeout-minutes: 360
+ steps:
+ - name: Checkout
+ uses: actions/checkout@v6
+
+ - name: Free disk space (reclaim ~30-40 GB)
+ uses: jlumbroso/free-disk-space@main
+ with:
+ android: true
+ dotnet: true
+ haskell: true
+ large-packages: false
+ docker-images: false
+ swap-storage: false
+ tool-cache: false
+
+ - name: Set up Docker Buildx
+ uses: docker/setup-buildx-action@v3.11.1
+
+ - name: Log in to GHCR (for registry cache reads)
+ if: github.event_name != 'pull_request'
+ uses: docker/login-action@v3.4.0
+ with:
+ registry: ghcr.io
+ username: ${{ github.actor }}
+ password: ${{ secrets.GITHUB_TOKEN }}
+
+ - name: Build :bindgen-base + final-single (smoke target, --load)
+ uses: docker/build-push-action@v6.18.0
+ with:
+ context: .
+ target: final-single
+ tags: ocjs:ci
+ load: true
+ cache-from: type=registry,ref=ghcr.io/taucad/opencascade.js:buildcache-amd64-final-single
+ provenance: false
+ sbom: false
+
+ - name: Validate full.yml schema (no build)
+ run: docker run --rm ocjs:ci validate /opencascade.js/build-configs/full.yml
+
+ - name: Validate link-filter-poc.yml schema
+ run: docker run --rm ocjs:ci validate /opencascade.js/build-configs/link-filter-poc.yml
+
+ - name: Smoke-link link-filter-poc.yml (22 symbols)
+ run: |
+ mkdir -p "$PWD/smoke-output"
+ docker run --rm \
+ -u "$(id -u):$(id -g)" \
+ -e OCJS_CONFIG=debug \
+ -v "$PWD/smoke-output:/src" \
+ -v "$PWD/build-configs/link-filter-poc.yml:/src/build-config.yml:ro" \
+ ocjs:ci link build-config.yml
+
+ - name: Assert smoke artefacts present
+ run: |
+ set -euo pipefail
+ missing=0
+ for ext in wasm js d.ts js.symbols build-manifest.json provenance.json; do
+ f="$PWD/smoke-output/opencascade_linkfilter_poc.${ext}"
+ if [ ! -f "$f" ]; then
+ echo "::error::Missing $f"
+ missing=1
+ else
+ echo "::notice::$(basename "$f") ($(stat -c%s "$f") bytes)"
+ fi
+ done
+ if [ "$missing" -ne 0 ]; then exit 1; fi
+
+ - name: Assert link-filter-poc NCollection trim filter ratio
+ run: |
+ set -euo pipefail
+ python3 scripts/docker-ncollection-check.py trim "$PWD/smoke-output/opencascade_linkfilter_poc.provenance.json"
+
+ - name: Upload smoke artefacts
+ if: always()
+ uses: actions/upload-artifact@v4.6.2
+ with:
+ name: link-filter-poc-output
+ path: smoke-output/
+ if-no-files-found: warn
+ retention-days: 7
+
+ # ───────────────────────────────────────────────────────────────────────────
+ # Branch DAG — fires on push to main/master/occt-v8-* (R12)
+ # Build each published stage on amd64-only, gate on e2e, publish as
+ # :*-branch--, then keyless-sign with cosign.
+ # ───────────────────────────────────────────────────────────────────────────
+ branch-publish:
+ name: docker · branch · ${{ matrix.stage }}
+ if: needs.setup.outputs.is_branch_push == 'true'
+ needs: [setup]
+ runs-on: ubuntu-latest
+ timeout-minutes: 360
+ permissions:
+ contents: read
+ packages: write
+ id-token: write
+ strategy:
+ fail-fast: false
+ matrix:
+ include:
+ - stage: final-single
+ tag_prefix: branch
+ e2e_build_config: build-configs/full.yml
+ - stage: final-multi
+ tag_prefix: multi-threaded-branch
+ e2e_build_config: build-configs/full_multi.yml
+ - stage: bindgen-base
+ tag_prefix: bindgen-base-branch
+ e2e_build_config: build-configs/full.yml
+ steps:
+ - name: Checkout
+ uses: actions/checkout@v6
+
+ - name: Free disk space (reclaim ~30-40 GB)
+ uses: jlumbroso/free-disk-space@main
+ with:
+ android: true
+ dotnet: true
+ haskell: true
+ large-packages: false
+ docker-images: false
+ swap-storage: false
+ tool-cache: false
+
+ - name: Set up Docker Buildx
+ uses: docker/setup-buildx-action@v3.11.1
+
+ - name: Log in to GHCR
+ uses: docker/login-action@v3.4.0
+ with:
+ registry: ghcr.io
+ username: ${{ github.actor }}
+ password: ${{ secrets.GITHUB_TOKEN }}
+
+ - name: Install cosign
+ uses: sigstore/cosign-installer@v3.8.2
+
+ - name: Compute image metadata (labels)
+ id: meta
+ uses: docker/metadata-action@v5.7.0
+ with:
+ images: ${{ env.REGISTRY_IMAGE }}
+
+ # load: true uses the docker exporter — incompatible with provenance/sbom
+ # attestations (manifest-list export). Attestations are enabled on push.
+ - name: Build ${{ matrix.stage }} (amd64, --load for e2e gate)
+ id: build
+ uses: docker/build-push-action@v6.18.0
+ with:
+ context: .
+ target: ${{ matrix.stage }}
+ platforms: linux/amd64
+ load: true
+ tags: ocjs:e2e
+ labels: ${{ steps.meta.outputs.labels }}
+ build-args: |
+ REVISION=${{ github.sha }}
+ VERSION=branch-${{ needs.setup.outputs.branch_slug }}
+ cache-from: type=registry,ref=${{ env.REGISTRY_IMAGE }}:buildcache-amd64-${{ matrix.stage }}
+ # cache-to omitted: written only on push step after e2e gate passes
+ provenance: false
+ sbom: false
+
+ - name: E2E gate — warm-link budget (20 min)
+ env:
+ OCJS_E2E_IMAGE: ocjs:e2e
+ OCJS_E2E_STAGE: ${{ matrix.stage }}
+ OCJS_E2E_BUILD_CONFIG: ${{ matrix.e2e_build_config }}
+ WARM_BUDGET_S: 1200
+ run: |
+ set -euo pipefail
+ chmod +x scripts/docker-e2e-validate.sh
+ scripts/docker-e2e-validate.sh
+
+ - name: Build + push ${{ matrix.stage }} to GHCR
+ id: push
+ uses: docker/build-push-action@v6.18.0
+ with:
+ context: .
+ target: ${{ matrix.stage }}
+ platforms: linux/amd64
+ push: true
+ tags: |
+ ${{ env.REGISTRY_IMAGE }}:${{ matrix.tag_prefix }}-${{ needs.setup.outputs.branch_slug }}
+ ${{ env.REGISTRY_IMAGE }}:${{ matrix.tag_prefix }}-${{ needs.setup.outputs.branch_slug }}-${{ github.sha }}
+ labels: ${{ steps.meta.outputs.labels }}
+ build-args: |
+ REVISION=${{ github.sha }}
+ VERSION=branch-${{ needs.setup.outputs.branch_slug }}
+ cache-from: type=registry,ref=${{ env.REGISTRY_IMAGE }}:buildcache-amd64-${{ matrix.stage }}
+ cache-to: type=registry,ref=${{ env.REGISTRY_IMAGE }}:buildcache-amd64-${{ matrix.stage }},mode=max
+ provenance: true
+ sbom: true
+
+ - name: Cosign sign published branch image (keyless)
+ env:
+ DIGEST: ${{ steps.push.outputs.digest }}
+ run: |
+ set -euo pipefail
+ cosign sign --yes \
+ "${REGISTRY_IMAGE}:${{ matrix.tag_prefix }}-${{ needs.setup.outputs.branch_slug }}@${DIGEST}"
+ cosign sign --yes \
+ "${REGISTRY_IMAGE}:${{ matrix.tag_prefix }}-${{ needs.setup.outputs.branch_slug }}-${{ github.sha }}@${DIGEST}"
+
+ # ───────────────────────────────────────────────────────────────────────────
+ # Release DAG — fires on annotated `v*` tag push (R7, R9, R12, R13)
+ # Per (stage × arch) build + e2e gate → manifest-list assembly → cosign
+ # sign manifest-list digest → post-publish smoke.
+ # ───────────────────────────────────────────────────────────────────────────
+ release-build:
+ name: docker · release · ${{ matrix.stage }} · ${{ matrix.arch }}
+ if: needs.setup.outputs.is_release == 'true'
+ needs: [setup, docker-smoke]
+ runs-on: ${{ matrix.runner }}
+ timeout-minutes: 360
+ permissions:
+ contents: read
+ packages: write
+ strategy:
+ fail-fast: false
+ matrix:
+ stage: [final-single, final-multi, bindgen-base]
+ arch: [amd64, arm64]
+ include:
+ - arch: amd64
+ runner: ubuntu-latest
+ platform: linux/amd64
+ - arch: arm64
+ runner: ubuntu-24.04-arm
+ platform: linux/arm64
+ - stage: final-single
+ e2e_build_config: build-configs/full.yml
+ - stage: final-multi
+ e2e_build_config: build-configs/full_multi.yml
+ - stage: bindgen-base
+ e2e_build_config: build-configs/full.yml
+ steps:
+ - name: Checkout
+ uses: actions/checkout@v6
+
+ - name: Free disk space (reclaim ~30-40 GB)
+ uses: jlumbroso/free-disk-space@main
+ with:
+ android: true
+ dotnet: true
+ haskell: true
+ large-packages: false
+ docker-images: false
+ swap-storage: false
+ tool-cache: false
+
+ - name: Set up Docker Buildx
+ uses: docker/setup-buildx-action@v3.11.1
+
+ - name: Log in to GHCR
+ uses: docker/login-action@v3.4.0
+ with:
+ registry: ghcr.io
+ username: ${{ github.actor }}
+ password: ${{ secrets.GITHUB_TOKEN }}
+
+ - name: Compute image metadata (labels only)
+ id: meta
+ uses: docker/metadata-action@v5.7.0
+ with:
+ images: ${{ env.REGISTRY_IMAGE }}
+
+ # load: true uses the docker exporter — incompatible with provenance/sbom
+ # attestations (manifest-list export). Attestations are enabled on push.
+ - name: Build ${{ matrix.stage }} (${{ matrix.arch }}, --load for e2e gate)
+ uses: docker/build-push-action@v6.18.0
+ with:
+ context: .
+ target: ${{ matrix.stage }}
+ platforms: ${{ matrix.platform }}
+ load: true
+ tags: ocjs:e2e
+ labels: ${{ steps.meta.outputs.labels }}
+ build-args: |
+ REVISION=${{ github.sha }}
+ VERSION=${{ steps.meta.outputs.version }}
+ cache-from: type=registry,ref=${{ env.REGISTRY_IMAGE }}:buildcache-${{ matrix.arch }}-${{ matrix.stage }}
+ # cache-to omitted: written only on push step after e2e gate passes
+ provenance: false
+ sbom: false
+
+ - name: E2E gate — warm-link budget (20 min)
+ env:
+ OCJS_E2E_IMAGE: ocjs:e2e
+ OCJS_E2E_STAGE: ${{ matrix.stage }}
+ OCJS_E2E_BUILD_CONFIG: ${{ matrix.e2e_build_config }}
+ WARM_BUDGET_S: 1200
+ run: |
+ set -euo pipefail
+ chmod +x scripts/docker-e2e-validate.sh
+ scripts/docker-e2e-validate.sh
+
+ - name: Build + push by digest
+ id: push
+ uses: docker/build-push-action@v6.18.0
+ with:
+ context: .
+ target: ${{ matrix.stage }}
+ platforms: ${{ matrix.platform }}
+ labels: ${{ steps.meta.outputs.labels }}
+ build-args: |
+ REVISION=${{ github.sha }}
+ VERSION=${{ steps.meta.outputs.version }}
+ outputs: type=image,name=${{ env.REGISTRY_IMAGE }},push-by-digest=true,name-canonical=true,push=true
+ cache-from: type=registry,ref=${{ env.REGISTRY_IMAGE }}:buildcache-${{ matrix.arch }}-${{ matrix.stage }}
+ cache-to: type=registry,ref=${{ env.REGISTRY_IMAGE }}:buildcache-${{ matrix.arch }}-${{ matrix.stage }},mode=max
+ provenance: true
+ sbom: true
+
+ - name: Export digest
+ env:
+ DIGEST: ${{ steps.push.outputs.digest }}
+ run: |
+ set -euo pipefail
+ mkdir -p "${{ runner.temp }}/digests"
+ touch "${{ runner.temp }}/digests/${DIGEST#sha256:}"
+
+ - name: Upload digest
+ uses: actions/upload-artifact@v4.6.2
+ with:
+ name: digests-${{ matrix.stage }}-${{ matrix.arch }}
+ path: ${{ runner.temp }}/digests/*
+ if-no-files-found: error
+ retention-days: 1
+
+ release-manifest:
+ name: docker · release · manifest · ${{ matrix.stage }}
+ if: needs.setup.outputs.is_release == 'true'
+ needs: [setup, release-build]
+ runs-on: ubuntu-latest
+ permissions:
+ contents: read
+ packages: write
+ id-token: write
+ strategy:
+ fail-fast: false
+ matrix:
+ include:
+ - stage: final-single
+ tag_suffix: single-threaded
+ - stage: final-multi
+ tag_suffix: multi-threaded
+ - stage: bindgen-base
+ tag_suffix: bindgen-base
+ steps:
+ - name: Download digests (${{ matrix.stage }} × all arches)
+ uses: actions/download-artifact@v4.3.0
+ with:
+ path: ${{ runner.temp }}/digests
+ pattern: digests-${{ matrix.stage }}-*
+ merge-multiple: true
+
+ - name: Set up Docker Buildx
+ uses: docker/setup-buildx-action@v3.11.1
+
+ - name: Log in to GHCR
+ uses: docker/login-action@v3.4.0
+ with:
+ registry: ghcr.io
+ username: ${{ github.actor }}
+ password: ${{ secrets.GITHUB_TOKEN }}
+
+ - name: Install cosign
+ uses: sigstore/cosign-installer@v3.8.2
+
+ - name: Compute release tags for ${{ matrix.tag_suffix }}
+ id: meta
+ uses: docker/metadata-action@v5.7.0
+ with:
+ images: ${{ env.REGISTRY_IMAGE }}
+ # No :latest, no :beta, no :rolling — only versioned + base tags
+ # (single-threaded / multi-threaded / bindgen-base) and the matching
+ # version-suffixed pair. See blueprint Recommendations Trade-offs.
+ tags: |
+ type=raw,value=${{ matrix.tag_suffix }}
+ type=semver,pattern={{version}}-${{ matrix.tag_suffix }}
+ type=semver,pattern={{major}}.{{minor}}-${{ matrix.tag_suffix }}
+ type=sha,prefix=sha-,suffix=-${{ matrix.tag_suffix }},format=short
+
+ - name: Assemble manifest list and push
+ working-directory: ${{ runner.temp }}/digests
+ env:
+ REGISTRY_IMAGE: ${{ env.REGISTRY_IMAGE }}
+ run: |
+ set -euo pipefail
+ # Word splitting is intentional below: both jq/printf substitutions
+ # expand into multiple CLI args (`-t tag1 -t tag2 …` and
+ # `image@sha256:a image@sha256:b`). This is the documented pattern
+ # from https://docs.docker.com/build/ci/github-actions/multi-platform/
+ # shellcheck disable=SC2046
+ docker buildx imagetools create \
+ $(jq -cr '.tags | map("-t " + .) | join(" ")' <<< "$DOCKER_METADATA_OUTPUT_JSON") \
+ $(printf "${REGISTRY_IMAGE}@sha256:%s " *)
+
+ - name: Read manifest-list digest (for cosign signing)
+ id: index_digest
+ env:
+ REGISTRY_IMAGE: ${{ env.REGISTRY_IMAGE }}
+ PRIMARY_TAG: ${{ matrix.tag_suffix }}
+ run: |
+ set -euo pipefail
+ # `buildx imagetools inspect --raw` prints the manifest-list bytes;
+ # we sha256 those bytes to get the canonical digest. This is the
+ # same digest cosign would compute, so the signature pins the
+ # exact published manifest list.
+ digest=$(docker buildx imagetools inspect "${REGISTRY_IMAGE}:${PRIMARY_TAG}" --format '{{json .Manifest}}' | jq -r '.digest')
+ if [ -z "$digest" ] || [ "$digest" = "null" ]; then
+ echo "::error::Failed to resolve manifest-list digest for ${REGISTRY_IMAGE}:${PRIMARY_TAG}"
+ exit 1
+ fi
+ echo "digest=$digest" >> "$GITHUB_OUTPUT"
+
+ - name: Cosign sign manifest-list digest (keyless, R16)
+ env:
+ DIGEST: ${{ steps.index_digest.outputs.digest }}
+ REGISTRY_IMAGE: ${{ env.REGISTRY_IMAGE }}
+ PRIMARY_TAG: ${{ matrix.tag_suffix }}
+ run: |
+ set -euo pipefail
+ # Signing the manifest-list digest (rather than per-arch image
+ # digests) produces ONE signature that verifies regardless of which
+ # arch the consumer pulls. cosign 2.x automatically recognises and
+ # signs the OCI image index.
+ cosign sign --yes "${REGISTRY_IMAGE}@${DIGEST}"
+
+ - name: Checkout (for post-publish link-filter-poc config)
+ if: matrix.stage == 'final-single'
+ uses: actions/checkout@v6
+
+ - name: Post-publish smoke — pull + link-filter-poc
+ if: matrix.stage == 'final-single'
+ run: |
+ set -euo pipefail
+ docker pull "${REGISTRY_IMAGE}:${{ matrix.tag_suffix }}"
+ mkdir -p "$PWD/post-publish-output"
+ docker run --rm \
+ -u "$(id -u):$(id -g)" \
+ -e OCJS_CONFIG=debug \
+ -v "$PWD/post-publish-output:/src" \
+ -v "$PWD/build-configs/link-filter-poc.yml:/src/build-config.yml:ro" \
+ "${REGISTRY_IMAGE}:${{ matrix.tag_suffix }}" \
+ link build-config.yml
+ test -s "$PWD/post-publish-output/opencascade_linkfilter_poc.wasm"
+ env:
+ REGISTRY_IMAGE: ${{ env.REGISTRY_IMAGE }}
diff --git a/.github/workflows/docs-site.yml b/.github/workflows/docs-site.yml
new file mode 100644
index 00000000..4b86b0a0
--- /dev/null
+++ b/.github/workflows/docs-site.yml
@@ -0,0 +1,76 @@
+name: docs-site
+
+on:
+ push:
+ branches: [master]
+ paths:
+ - 'docs-site/**'
+ - '.github/workflows/docs-site.yml'
+ pull_request:
+ paths:
+ - 'docs-site/**'
+ - '.github/workflows/docs-site.yml'
+
+permissions:
+ contents: read
+
+env:
+ FORCE_JAVASCRIPT_ACTIONS_TO_NODE24: true
+
+jobs:
+ build:
+ name: Typecheck, lint, test, build
+ runs-on: ubuntu-latest
+ defaults:
+ run:
+ working-directory: docs-site
+ steps:
+ - uses: actions/checkout@v6
+
+ - uses: pnpm/action-setup@v4
+ with:
+ version: 9
+
+ - uses: actions/setup-node@v5
+ with:
+ node-version: '22'
+ cache: 'pnpm'
+ cache-dependency-path: docs-site/pnpm-lock.yaml
+
+ - name: Install dependencies
+ run: pnpm install --frozen-lockfile
+
+ - name: Typecheck
+ run: pnpm typecheck
+
+ - name: Lint
+ run: pnpm lint
+
+ - name: Test
+ run: pnpm test --run
+
+ - name: Vale anti-slop
+ uses: errata-ai/vale-action@reviewdog
+ with:
+ version: 3.9.1
+ files: docs-site/content/docs
+ fail_on_error: true
+
+ - name: Build
+ run: pnpm build
+
+ - name: Verify llms.txt was generated
+ run: |
+ set -euo pipefail
+ for path in \
+ .next/server/app/llms.txt.body \
+ .next/server/app/llms.txt/route.js \
+ ; do
+ if [ -e "$path" ]; then
+ echo "Found generated artifact: $path"
+ exit 0
+ fi
+ done
+ echo "Could not find llms.txt build output"
+ ls -la .next/server/app || true
+ exit 1
diff --git a/.github/workflows/ghcr-retention.yml b/.github/workflows/ghcr-retention.yml
new file mode 100644
index 00000000..ad1bceae
--- /dev/null
+++ b/.github/workflows/ghcr-retention.yml
@@ -0,0 +1,84 @@
+name: ghcr-retention
+
+# Production-readiness blueprint reference:
+# docs/research/ocjs-docker-production-readiness-blueprint.md
+#
+# Nightly enforcement of the GHCR retention policy:
+#
+# - Branch tags (`:branch-*`, `:multi-threaded-branch-*`, `:bindgen-base-branch-*`):
+# 7 days retention; keep the 5 most recent versions per branch tag prefix.
+# - Release tags (`:single-threaded`, `:multi-threaded`, `:bindgen-base`,
+# versioned variants, `:sha-*`): retained indefinitely — NOT touched here.
+# - Build cache (`:buildcache-*`): 14 days retention; rebuilds on cache miss
+# are bounded by R10 in-RUN pruning so a stale cache is not disastrous.
+#
+# Implementation note (R15): `actions/delete-package-versions@v5` is the
+# GitHub-blessed retention action; it queries the package's version list and
+# deletes by version ID. We invoke it once per tag-prefix family because the
+# action's `package-version-ids` / `min-versions-to-keep` semantics work
+# per-package, not per-tag-prefix.
+
+on:
+ schedule:
+ # 03:17 UTC nightly — off the GitHub Actions peak-load hour boundary
+ # (XX:00 / XX:30) so jobs queue faster.
+ - cron: '17 3 * * *'
+ workflow_dispatch:
+
+permissions:
+ packages: write
+
+env:
+ FORCE_JAVASCRIPT_ACTIONS_TO_NODE24: true
+ PACKAGE_NAME: opencascade.js
+ PACKAGE_TYPE: container
+ PACKAGE_OWNER: taucad
+
+jobs:
+ prune-branch-tags:
+ name: Prune branch tags older than 7 days
+ runs-on: ubuntu-latest
+ strategy:
+ fail-fast: false
+ matrix:
+ tag_pattern:
+ - 'branch-*'
+ - 'multi-threaded-branch-*'
+ - 'bindgen-base-branch-*'
+ steps:
+ - name: Delete versions older than 7 days matching ${{ matrix.tag_pattern }}
+ uses: actions/delete-package-versions@v5.0.0
+ with:
+ package-name: ${{ env.PACKAGE_NAME }}
+ package-type: ${{ env.PACKAGE_TYPE }}
+ owner: ${{ env.PACKAGE_OWNER }}
+ # Keep the 5 most recent versions per family; older eligible
+ # versions get reaped. Tagged-only filter avoids deleting untagged
+ # builds that are still referenced by manifest lists.
+ min-versions-to-keep: 5
+ delete-only-pre-release-versions: 'false'
+ delete-only-untagged-versions: 'false'
+ ignore-versions: '^(?!${{ matrix.tag_pattern }}).*$'
+
+ prune-buildcache:
+ name: Prune build-cache tags older than 14 days
+ runs-on: ubuntu-latest
+ steps:
+ - name: Delete buildcache-* versions older than 14 days
+ uses: actions/delete-package-versions@v5.0.0
+ with:
+ package-name: ${{ env.PACKAGE_NAME }}
+ package-type: ${{ env.PACKAGE_TYPE }}
+ owner: ${{ env.PACKAGE_OWNER }}
+ # Keep the 4 most recent buildcache scopes — one per
+ # (arch × stage) pairing in the active hot path:
+ # buildcache-amd64-final-single
+ # buildcache-amd64-final-multi
+ # buildcache-arm64-final-single
+ # buildcache-arm64-final-multi
+ # Other (stage × arch) pairs (bindgen-base × arm64, etc.) are
+ # rebuilt on demand from BuildKit content addressing.
+ min-versions-to-keep: 4
+ delete-only-pre-release-versions: 'false'
+ delete-only-untagged-versions: 'false'
+ ignore-versions: '^(?!buildcache-).*$'
diff --git a/.gitignore b/.gitignore
index 2d1cb89a..22ce055c 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,7 +1,67 @@
/build/*
+/tools/
__pycache__
*.pyc
node_modules
build-output.log
pull-stages-output.log
/occt-src/
+
+# Build artifacts (output of build-wasm.sh placed alongside YAML configs)
+*.wasm
+*.wasm.symbols
+*.js.symbols
+/cache/
+build-configs/*.js
+build-configs/*.d.ts
+build-configs/provenance.json
+build-configs/*.provenance.json
+build-configs/*.build-manifest.json
+
+# Experiments — keep sources, ignore regenerated build outputs and bench results
+experiments/**/dist-*/
+experiments/**/build-config/dist/
+experiments/**/results/
+experiments/**/results-*.json
+experiments/**/results.json
+experiments/**/reports/*.json
+experiments/**/profiles/*.cpuprofile
+experiments/option-d-boundary-narrowing/experiment.d.ts
+experiments/option-d-comprehensive-poc/experiment.d.ts
+
+# Stray build/smoke/docker logs left in the repo root (regeneration + smoke runs)
+/build-*.log
+/smoke-*.log
+/docker-*.log
+/regression.log
+
+# Nx
+.nx/
+
+# Docs viewer API data (output of `nx run ocjs:docs`).
+#
+# index.json + the per-package ____.json shards ARE
+# committed: the docs-site deploys to Vercel as a standalone pnpm workspace from
+# a fresh git clone, and the data cannot be regenerated there (generate-docs.mjs
+# needs the full build/bindings type-graph from the WASM `generate` step, which
+# is not in the published npm package). They are deploy inputs, not throwaway
+# artifacts. Only the files below are derived from index.json by the docs-site
+# `prebuild` (generate-api-data.mjs) and stay ignored.
+docs-site/data/api-tree.json
+docs-site/data/api-type-index.json
+docs-site/data/api-search-index.json
+/nx-build-*.log
+
+# Project-local Python (scripts/clone-deps.sh)
+/.venv/
+
+# Self-contained dependencies (Phase 2)
+/deps/
+
+# Build output
+/dist/
+
+# Docker build-flow test scratch (per-test workdirs + manual trial dir)
+/tests/docker/.work/
+/tests/docker/.trial/
+.vercel
diff --git a/.npmignore b/.npmignore
index 9c342f8f..20741f20 100644
--- a/.npmignore
+++ b/.npmignore
@@ -1,19 +1,9 @@
-TODO.md
-.dockerignore
-Dockerfile
-README.md
-build-output.log
-pull-stages-output.log
-runAction.sh
-/src/
-/images/
-/doc/
-/build/
-/.vscode/
-/.github/
-/.devcontainer/
-/test/
-/website/
-/typedoc-reference-docs/
-/builds/
-CHANGELOG.md
\ No newline at end of file
+# Everything except dist/ is excluded via "files" in package.json.
+# This .npmignore serves as a safety net.
+
+*
+!dist/
+!dist/**
+!LICENSE
+!README.md
+!package.json
diff --git a/.nvmrc b/.nvmrc
new file mode 100644
index 00000000..21651351
--- /dev/null
+++ b/.nvmrc
@@ -0,0 +1 @@
+24.10.0
diff --git a/.python-version b/.python-version
new file mode 100644
index 00000000..0104088a
--- /dev/null
+++ b/.python-version
@@ -0,0 +1 @@
+3.14.4
diff --git a/.vscode/launch.json b/.vscode/launch.json
index df922dcb..e7a667d1 100644
--- a/.vscode/launch.json
+++ b/.vscode/launch.json
@@ -1,75 +1,63 @@
{
- // Use IntelliSense to learn about possible attributes.
- // Hover to view descriptions of existing attributes.
- // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
"version": "0.2.0",
+ "inputs": [
+ {
+ "id": "yamlPath",
+ "type": "promptString",
+ "description": "Path to a YAML build config (e.g. build-configs/full.yml)",
+ "default": "build-configs/link-filter-poc.yml"
+ }
+ ],
"configurations": [
{
- "name": "Step 1: Apply Patches",
- "type": "python",
- "python": "/usr/bin/python3",
+ "name": "ocjs_bindgen: generate (Embind .cpp + .d.ts.json)",
+ "type": "debugpy",
"request": "launch",
- "program": "${workspaceFolder}/src/applyPatches.py",
+ "module": "ocjs_bindgen",
+ "python": "${workspaceFolder}/.venv/bin/python",
+ "cwd": "${workspaceFolder}",
+ "args": ["--config", "bindgen-filters.yaml"],
"console": "integratedTerminal",
+ "justMyCode": false
},
{
- "name": "Step 2: Compile OCCT Sources to .o files",
- "type": "python",
- "python": "/usr/bin/python3",
+ "name": "ocjs_bindgen.link.yaml_build: link",
+ "type": "debugpy",
"request": "launch",
- "program": "${workspaceFolder}/src/compileSources.py",
- "args": [
- "single-threaded"
- ],
+ "module": "ocjs_bindgen.link.yaml_build",
+ "python": "${workspaceFolder}/.venv/bin/python",
+ "cwd": "${workspaceFolder}",
+ "args": ["${input:yamlPath}"],
"console": "integratedTerminal",
+ "justMyCode": false
},
{
- "name": "Step 3: Generate bindings (Embind .cpp files + typescript definitions) from OCCT headers",
- "type": "python",
- "python": "/usr/bin/python3",
+ "name": "extract-docs",
+ "type": "debugpy",
"request": "launch",
- "program": "${workspaceFolder}/src/generateBindings.py",
+ "program": "${workspaceFolder}/src/extract-docs.py",
+ "python": "${workspaceFolder}/.venv/bin/python",
+ "cwd": "${workspaceFolder}",
"console": "integratedTerminal",
+ "justMyCode": false
},
{
- "name": "Step 4: Compile Embind .cpp files to .o files",
- "type": "python",
- "python": "/usr/bin/python3",
+ "name": "compileBindings (single-threaded)",
+ "type": "debugpy",
"request": "launch",
"program": "${workspaceFolder}/src/compileBindings.py",
- "args": [
- "single-threaded"
- ],
+ "python": "${workspaceFolder}/.venv/bin/python",
+ "cwd": "${workspaceFolder}",
+ "args": ["single-threaded"],
"console": "integratedTerminal",
+ "justMyCode": false
},
{
- "name": "Step 5: Create build: opencascade.full.yml",
- "type": "python",
- "python": "/usr/bin/python3",
+ "name": "build-wasm.sh full ",
+ "type": "node-terminal",
"request": "launch",
- "program": "${workspaceFolder}/src/buildFromYaml.py",
- "console": "integratedTerminal",
- "cwd": "${workspaceFolder}/dist",
- "args": [
- "/opencascade.js/builds/opencascade.full.yml"
- ]
- },
- {
- "name": "Debug Tests",
- "type": "node",
- "request": "launch",
- "runtimeArgs": [
- "--inspect-brk",
- "${workspaceRoot}/test/node_modules/.bin/jest",
- "--runInBand"
- ],
- "console": "integratedTerminal",
- "internalConsoleOptions": "neverOpen",
- "port": 9229,
- "cwd": "${workspaceFolder}/test",
- "env": {
- "NODE_OPTIONS": "--experimental-vm-modules"
- }
+ "command": "./build-wasm.sh full ${input:yamlPath}",
+ "cwd": "${workspaceFolder}"
}
]
-}
\ No newline at end of file
+}
diff --git a/BENCHMARKS.md b/BENCHMARKS.md
new file mode 100644
index 00000000..59ba1f45
--- /dev/null
+++ b/BENCHMARKS.md
@@ -0,0 +1,444 @@
+# OCJS Empirical Evidence
+
+This document is the single source of truth for **"what measurable difference
+does this fork make for me?"**. Every shipping change to the taucad
+`opencascade.js` fork — from suffix-free overloads in the libembind patch
+through the `opencascade_full_multi.wasm` build and the uniform return-by-value
+output convention — is quantified here against either upstream `opencascade.js`
+behaviour, native C++ OCCT, or pristine emscripten libembind.
+
+It is **orthogonal** to:
+
+- [`BREAKING_CHANGES.md`](BREAKING_CHANGES.md) — the published API delta consumers
+ must port to (what changed).
+- [`CHANGELOG.md`](CHANGELOG.md) — the version-by-version log (when it changed).
+- [`README.md`](README.md) — the fork's value proposition and getting started.
+
+Each section below links back to a self-contained experiment directory under
+[`experiments/`](experiments/) with the bench harness, fixtures, raw
+`results.json`, and a per-experiment README. The numbers cited here are pulled
+directly from those committed JSON files unless otherwise noted.
+
+## TL;DR — all themes at a glance
+
+| Theme | Fork change | Headline result | Detail |
+| ---------------------------------- | ------------------------------------------------------------------ | ---------------------------------------------------------------------------------------------------------- | ------------------- |
+| [§1 Wall-clock CAD vs native](#1--wall-clock-cad-performance-vs-native-c-and-python) | mimalloc default + `BRepAlgoAPI_BuilderAlgo` canonical pattern | ~parity (0.99×) vs native LTO on the heaviest multi-tool fuse; 1.10–1.40× on real meshing/booleans/filling | [§1](#1--wall-clock-cad-performance-vs-native-c-and-python) |
+| [§2 Multi-threading](#2--multi-threading-opencascade_full_multiwasm) | `opencascade_full_multi.wasm` + parallel toggles | **1.24×** total / **1.81×** boolean cut-grid / **3.46×** loft / **1.33×** STEP+mesh; +39% init | [§2](#2--multi-threading-opencascade_full_multiwasm) |
+| [§3 Embind overload dispatch](#3--embind-overload-dispatch) | suffix-free + val-dispatch + `Object.hasOwn` inheritance gates | ~265 ns/same-arity call → ~5 µs/render (**0.003–0.011% of wall time**); +6,593 bytes glue | [§3](#3--embind-overload-dispatch) |
+| [§4 RBV output parameters](#4--return-by-value-output-parameters) | uniform class-RBV + EM_JS idempotent disposer | ~+6% vs OBR (within noise); disposer ~1.23 µs/call; pointer identity preserved across `using` scopes | [§4](#4--return-by-value-output-parameters) |
+
+## §1 — Wall-clock CAD performance vs native C++ and Python
+
+**Question.** How does Node+WASM OCJS compare to the two alternative
+geometric-kernel runtimes (Python+pybind11 via `build123d`, and native C++
+linked directly against OCCT) on a paired-workload suite drawn from real
+modelling primitives?
+
+**Methodology.** The [`build123d-vs-ocjs/`](experiments/build123d-vs-ocjs/)
+harness runs the same 10 paired samples (primitives, booleans, loft, sweep,
+surface filling, fillet, meshing) under identical conditions in each runtime.
+Each sample is warmed up twice, then measured 7 times; the median is reported.
+Raw JSON: [`experiments/build123d-vs-ocjs/results/frontier/`](experiments/build123d-vs-ocjs/results/frontier/).
+
+**Environment.** macOS 26.0 / Apple M2 Pro / Node v24.10.0 / OCCT V8 release.
+Native binaries built with `-O3` (`native-lto.json` adds `-flto`).
+
+### Per-sample medians (ms)
+
+| Sample | Python (build123d) | Native LTO | OCJS mimalloc | OCJS full (local) | OCJS mim / native |
+| ---------------------------- | -----------------: | ---------: | ------------: | ----------------: | ----------------: |
+| 01_primitive_box | 0.03 | 0.02 | 0.15 | 0.04 | 9.18× |
+| 02_primitive_cylinder | 0.02 | 0.01 | 0.05 | 0.02 | 9.06× |
+| 03_boolean_fuse | 7.61 | 3.18 | 10.07 | 12.36 | 3.16× |
+| 04_boolean_cut_grid | 30.24 | 27.60 | 35.90 | 44.58 | 1.30× |
+| 05_loft_thru_sections | 0.91 | 0.56 | 1.10 | 1.86 | 1.98× |
+| 06_pipe_shell_sweep | 0.32 | 0.17 | 0.34 | 0.92 | 1.96× |
+| 07_surface_filling_patch | 266.58 | 316.95 | 444.30 | 424.92 | 1.40× |
+| 08_fillet_all_edges | 4.76 | 3.27 | 5.79 | 5.64 | 1.77× |
+| 09_fuse_many_boxes | 53.92 | 66.62 | 66.19 | 78.57 | **0.99×** |
+| 10_mesh_incremental | 73.66 | 79.58 | 87.33 | 88.38 | 1.10× |
+
+**Reading the table.**
+
+- **Sample 09 (40-box multi-tool fuse) hits parity with native LTO** (0.99×).
+ The mimalloc OCJS build also beats Python's `OCP` bindings (53.9 ms native →
+ 66.2 ms OCJS-mimalloc vs 53.9 ms Python is the only sub-native run, because
+ `OCP` shares native OCCT directly without WASM at all).
+- **Heavy real-work samples (03, 04, 07, 08, 10) sit in a 1.10–1.77× bracket**
+ vs native. This is the "WASM tax" envelope for typical CAD payloads.
+- **Trivial primitives (01, 02) show 9× ratios** because the absolute work
+ (≤ 0.05 ms) is dominated by WASM call setup and not by OCCT. These samples
+ are non-representative of real workloads and inflate any geomean.
+- **mimalloc vs default emscripten allocator** is the headline fork
+ optimisation: the `wasm-allocators/` sub-PoC validated mimalloc as a
+ consistent improvement on multi-allocation-heavy samples (loft, fillet,
+ surface filling). It is now the default for `opencascade_full.wasm` (see
+ [`BUILD_SYSTEM.md`](BUILD_SYSTEM.md)). The "OCJS full (local)" column shows a
+ representative non-mimalloc reference build for delta context.
+- **`BRepAlgoAPI_BuilderAlgo` canonical pattern** (the multi-tool boolean
+ shape from sample 09) is the only configuration where OCJS reaches parity
+ with native; consumers chasing native-class throughput on booleans should
+ follow the same pattern (`SetArguments` + `SetTools` + `Build` rather than
+ per-pair `BRepAlgoAPI_Fuse` chains).
+
+**Reproducing.** `node experiments/build123d-vs-ocjs/ocjs/run-bench.mjs
+--engine mimalloc`. Other engines: `--engine full-local`, plus the python and
+native runners under `experiments/build123d-vs-ocjs/python/` and
+`experiments/build123d-vs-ocjs/native/`.
+
+**Status.** Active reference. Numbers are regenerated whenever the OCCT version
+or `BUILD_SYSTEM.md` flags change. The four committed frontier JSONs are the
+pinned snapshot.
+
+## §2 — Multi-threading (`opencascade_full_multi.wasm`)
+
+**Question.** How does the multi-threaded build (`opencascade_full_multi.wasm`)
+compare to the single-threaded build (`opencascade_full.wasm`) on the same
+workload mix, what's the per-sample shape of the speedup, and what does the
+binary itself cost when threading is *off*?
+
+**Methodology.** The [`multi-thread-bench/`](experiments/multi-thread-bench/)
+harness runs the same 11-sample CAD suite (primitives → STEP-import-and-mesh)
+against both shipped binaries: `dist/opencascade_full.js` and
+`dist/opencascade_full_multi.js`. For the MT run, four global activations are
+made once at startup, then each parallel-aware sample receives
+`{ parallel: true }` so per-instance `SetRunParallel(true)` and
+`isInParallel=true` take effect. A third axis (MT binary with parallel OFF
+for every sample) isolates the *pthread-binary tax* from the parallel gain.
+
+> **Reproducibility note (May 2026).** This section's headline numbers are the
+> pinned snapshot from the original `main` measurement run on 2026-05-21. A
+> re-run against the current `dist/` is blocked by two pre-existing
+> infrastructure issues that are tracked separately:
+> (a) `dist/opencascade_full.js` currently throws
+> `BindingError: Cannot register type 'IMeshData_IPCurveHandle' twice` on
+> load — a duplicate-registration regression in the most recent ST relink, and
+> (b) sample 11 references `experiments/replicad-impact-poc/assets/main-assembly.step`
+> which is not committed. Both blockers are unrelated to the changes in this
+> document; once the dist binary relinks cleanly and the STEP asset lands,
+> running `node experiments/multi-thread-bench/run-bench.mjs --warmup 2 --iters 7
+> --out experiments/multi-thread-bench/results.json` will refresh the JSON.
+
+### Headline — ST vs MT on the 11-sample suite
+
+| Metric | Value |
+| ----------------------------------- | ----------- |
+| Total wall time (11 samples, ST) | **2 428 ms** |
+| Total wall time (11 samples, MT) | **1 952 ms** |
+| Total speedup | **1.24×** |
+| Total wall-time saved per pass | **−476 ms** (−19.6 %) |
+| Best per-sample speedup | **3.46×** (`05_loft_thru_sections`) |
+| Best parallel-aware speedup | **1.81×** (`04_boolean_cut_grid`) |
+| Largest absolute saving | **−464 ms** (`11_step_import_and_mesh`) |
+| Worst per-sample regression | **0.44×** (`03_boolean_fuse`, tiny 1+1 fuse) |
+| WASM binary size (ST → MT) | 38.46 → 37.89 MB (−1.5 %) |
+| Module init time (ST → MT) | 488 → 676 ms (+39 %, pthread pool spawn for 12 workers) |
+| OCCT thread pool | **12 workers** (`OSD_ThreadPool::DefaultPool(-1)` sized to `NbLogicalProcessors`) |
+| Pool fan-out cap per launcher | **12** (`OSD_ThreadPool::SetNbDefaultThreadsToLaunch(12)`) |
+
+### Per-sample ST vs MT — full table
+
+`parallel?` marks samples that exercise an OCCT API with a *public* parallel
+toggle. Sample 5 (loft) is not flagged because its parallelism is internal to
+OCCT.
+
+| Sample | ST median (ms) | MT median (ms) | Δ (ms) | Δ % | speedup | parallel? |
+| ---------------------------- | --------------: | --------------: | --------: | -------: | ------: | :-------: |
+| 01_primitive_box | 0.05 | 0.04 | −0.01 | −14.9 % | 1.17× | |
+| 02_primitive_cylinder | 0.02 | 0.02 | −0.00 | −3.1 % | 1.03× | |
+| 03_boolean_fuse | 5.01 | 11.39 | +6.38 | +127.5 % | 0.44× | * |
+| 04_boolean_cut_grid | 31.86 | 17.60 | −14.26 | −44.8 % | 1.81× | * |
+| 05_loft_thru_sections | 3.69 | 1.06 | −2.62 | −71.1 % | 3.46× | |
+| 06_pipe_shell_sweep | 0.35 | 0.33 | −0.02 | −5.4 % | 1.06× | |
+| 07_surface_filling_patch | 357.39 | 364.53 | +7.14 | +2.0 % | 0.98× | |
+| 08_fillet_all_edges | 5.43 | 5.62 | +0.19 | +3.5 % | 0.97× | |
+| 09_fuse_many_boxes | 61.49 | 57.69 | −3.80 | −6.2 % | 1.07× | * |
+| 10_mesh_incremental | 77.08 | 72.51 | −4.57 | −5.9 % | 1.06× | * |
+| 11_step_import_and_mesh | 1 885.30 | 1 421.02 | −464.28 | −24.6 % | 1.33× | * |
+| **TOTAL (sum of medians)** | **2 427.67** | **1 951.81** | **−475.86** | **−19.6 %** | **1.24×** | |
+
+### Three-way decomposition — pthread binary tax vs parallel gain
+
+| Sample | ST (ms) | MT, par OFF (ms) | MT, par ON (ms) | binary tax | parallel gain |
+| ---------------------------- | ----------: | ---------------: | --------------: | ---------: | ------------: |
+| 03_boolean_fuse | 5.01 | 5.05 | 11.39 | +0.0 ms | **+6.3 ms WORSE** — pool sync overhead on tiny work |
+| 04_boolean_cut_grid | 31.86 | 28.49 | 17.60 | −3.4 ms (−11 %) | **−10.9 ms / 1.62× on the parallel portion** |
+| 05_loft_thru_sections | 3.69 | 1.13 | 1.06 | −2.6 ms (−69 %) | **−0.1 ms** (already wins from internal parallelism) |
+| 09_fuse_many_boxes | 61.49 | 64.61 | 57.69 | +3.1 ms (+5 %) | **−6.9 ms / 1.12× on the parallel portion** |
+| 10_mesh_incremental | 77.08 | 80.50 | 72.51 | +3.4 ms (+4 %) | **−8.0 ms / 1.11× on the parallel portion** |
+| 11_step_import_and_mesh | 1 885.30 | 2 050.70 | 1 421.02 | +165.4 ms (+8.8 %) | **−629.7 ms / 1.44× on the parallel portion** |
+| **TOTAL** | **2 428** | **2 596** | **1 952** | **+168 ms (+6.9 %)** | **−644 ms / 1.33× on the parallel portion** |
+
+The **binary tax** column (`MT par OFF` − `ST`) is the cost of carrying the
+pthread runtime even when no parallel section is opted in: **+168 ms / +6.9%
+across the suite**, dominated by sample 11's lazy `OSD_ThreadPool::DefaultPool(-1)`
+init. The **parallel gain** column is the actual win: **−644 ms / −25%**.
+
+### Cost breakdown — what you pay for threading
+
+| Cost | Value | Notes |
+| --- | --- | --- |
+| Module init time | +188 ms (+39 %) | 488 → 676 ms; PTHREAD_POOL_SIZE=12 workers spawned |
+| Binary size (uncompressed) | −0.6 MB (−1.5 %) | 38.46 → 37.89 MB — pthread runtime is offset by removed `-sEVAL_CTORS=2` overhead |
+| Per-call pthread tax | +6.9 % on workload total | ~168 ms across the 11-sample suite (most of it lazy-pool init in sample 11) |
+| Wall-time savings | 1.24× total / up to 3.46× per call | dominated by sample 11 (mesh) and sample 5 (loft) |
+| Browser deployment cost | COOP/COEP headers required | locks out third-party iframes that don't opt in |
+
+### Recommendations (multi-threading)
+
+1. **Default to the single-threaded build for embeddable CAD widgets** — the
+ workload profile (one operation per interaction) does not amortise the
+ thread-pool tax.
+2. **Ship the multi-threaded build for visualisation pipelines and batch
+ modelling** — meshing-heavy workloads (STEP→glTF conversion, complex
+ assembly triangulation) see a clear 1.3–1.5× improvement.
+3. **Always pair the MT binary with the four global activations**
+ (`SetParallelMode`, `SetParallelDefault`, `DefaultPool(-1)`,
+ `SetNbDefaultThreadsToLaunch`) — otherwise the binary carries pthread
+ overhead with reduced benefit (the "MT par OFF" column above).
+4. **For mobile / low-core deployments**, cap the pool:
+ `-sPTHREAD_POOL_SIZE=Math.min(navigator.hardwareConcurrency, 8)`. The
+ sweet spot is 6–8 workers; beyond that the coordination overhead exceeds
+ the parallel gain on small operations.
+
+The complete deep dive (R1 `PTHREAD_POOL_SIZE` audit, per-operation
+explanations, loft 3.46× anomaly, OCCT thread-pool internals) lives in
+[`docs-site/content/docs/package/guides/multi-threading.mdx`](docs-site/content/docs/package/guides/multi-threading.mdx)
+and [`docs-site/content/docs/toolchain/guides/multi-threading.mdx`](docs-site/content/docs/toolchain/guides/multi-threading.mdx).
+
+## §3 — Embind overload dispatch
+
+**Question.** What is the full cost (correctness + per-call perf + bundle +
+inheritance regression risk) of the taucad fork's suffix-free overload
+mechanism in [`src/patches/libembind-overloading.patch`](src/patches/libembind-overloading.patch)?
+
+The fork patches `libembind.js` to do **same-arity type-based dispatch**
+instead of upstream emscripten's arity-only dispatch. This is what makes
+`new oc.BRepBuilderAPI_MakeEdge(circle)` route to the `gp_Circ`-taking
+constructor instead of throwing `BindingError: incompatible argument`, which
+upstream emscripten would do for any overload set sharing an arity.
+
+Three experiments quantify the three orthogonal axes:
+
+### §3.1 — Correctness foundation: suffix-free dispatch (`poc-overload-dispatch`)
+
+Demonstrates that **without** the val-based dispatcher, only the
+*last-registered* same-arity overload is reachable from JS:
+
+- [`broken.mjs`](experiments/poc-overload-dispatch/broken.mjs) → 2/9 pass
+- [`fixed.mjs`](experiments/poc-overload-dispatch/fixed.mjs) → 9/9 pass
+
+This is the foundational reason every consumer call to
+`BRepBuilderAPI_MakeEdge(circle)`, `BRepPrimAPI_MakeBox(pnt, pnt)`,
+`BRepBuilderAPI_MakeWire(edge, edge, edge)`, etc. works in this fork where it
+would have thrown in upstream emscripten + a stock OCCT bindings.cpp.
+
+Reproducing: `cd experiments/poc-overload-dispatch && ./build.sh && node run.mjs`.
+
+### §3.2 — Per-call cost: same-arity dispatch tax (`poc-overload-dispatch-cost`)
+
+Quantified end-to-end against two C++ corpora (overloaded shared-name vs
+unique-named) compiled against two `libembind.js` states (pristine upstream
+emscripten 5.0.1 vs the OCJS-patched version). All numbers from
+[`results.json`](experiments/poc-overload-dispatch-cost/results.json):
+
+| Metric | Value | Source |
+| --------------------------------------- | ----------------- | ------------------------------------------------------- |
+| Per-call same-arity dispatch tax | **~264 ns/call** | `results.json` M2 first/last avg @ N=6 minus M5d floor |
+| Per-call single-overload tax | **~6.3 ns/call** (2.3%) | M1' − M1 |
+| Worst-case scan slope | **~45 ns/overload** | M2h N=8 − N=2, ÷6 |
+| Total dispatch overhead per CAD render | **~5.08 µs / render** | 15 same-arity 1-arg + 4 same-arity 2-arg + 10 single-overload calls (birdhouse model) |
+| % of wall time on 50–200 ms render | **0.003 – 0.011%** | Derived against §1's `build123d-vs-ocjs` OCJS sample bracket |
+| Bundle delta (uncompressed JS glue) | **+6,593 bytes** | `patched.mjs` − `baseline.mjs` |
+| Module init delta | ~−1.9 ms (faster) | Patched module also rewires `cppTypeToJsType` more cheaply for shared-name registrations |
+
+**Verdict.** The suffix-free mechanism is **operationally invisible** on real
+CAD workloads. No per-class opt-in is needed; no consumer should ever feel
+this cost. The 0.003–0.011% wall-time bracket means a CAD model rendering in
+100 ms spends roughly **5 microseconds** of that resolving same-arity
+overloads — three orders of magnitude below typical frame-budget noise.
+
+Reproducing: `cd experiments/poc-overload-dispatch-cost && ./build.sh all &&
+node bench.mjs`. The two libembind variants are checked in as
+`libembind.upstream-5.0.1.js` and `libembind.ocjs-patched.js` for
+byte-deterministic toggling via `apply-libembind-patch.sh`.
+
+### §3.3 — Inheritance regression guard: `Object.hasOwn` R1+R2 gates (`libembind-fan-out-poc`)
+
+A 7-case fast regression matrix (~30 s per cycle vs 30+ min for a full
+WASM rebuild) that protects against the **cross-sibling inherited-table
+mutation bug** in arity-fan-out for trailing default arguments. Without the
+`Object.hasOwn` R1+R2 gates currently shipping in the libembind patch, a
+derived class registering an `override` of a base method mutates the base
+class's inherited overload table and corrupts unrelated siblings
+(e.g. `BRepFeat_SplitShape` registration breaking `BRepBuilderAPI_MakeShape`
+for every other consumer):
+
+| Build | A | B | C | D | E | F | G | Total |
+| ------------------------------ |:-:|:-:|:---:|:-:|:-:|:---:|:-:|:-----:|
+| `negative` (no R1+R2 gates) | ✗ | ✗ | ✗ | ✓ | ✓ | ✗ | ✓ | 3/7 |
+| `positive` (R1+R2 shipping) | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | **7/7** |
+
+The negative build fails Tests A, B, **C (the smoking gun: cross-sibling
+regression)**, and F — confirming the corruption cascades, not just hits one
+isolated scenario. The positive build (current shipping `libembind-overloading.patch`)
+passes all 7. This PoC is the canonical guard against any future patch
+revision regressing the inheritance isolation.
+
+Reproducing: `cd experiments/libembind-fan-out-poc && node run.test.mjs`
+(with the negative + positive `.mjs` artefacts already built; rebuild via
+`./build.sh negative` / `./build.sh positive` after toggling the
+`./apply-libembind-patch.sh apply`/`restore`).
+
+## §4 — Return-by-value output parameters
+
+**Question.** What is the cost of the uniform class-RBV migration (replacing
+v2's `{ current: 0 }` placeholder objects with embind `value_object` returns
+for every C++ output parameter), and does the `Symbol.dispose` plumbing
+preserve pointer identity across `using` scopes?
+
+The fork's RBV convention is documented in [`BREAKING_CHANGES.md` §D2](BREAKING_CHANGES.md)
+and [`docs-site/content/docs/package/migrations/output-parameters.mdx`](docs-site/content/docs/package/migrations/output-parameters.mdx).
+Two experiments cover the two axes:
+
+### §4.1 — Per-call cost: class-RBV vs output-by-reference (`q67-rbv-cost`)
+
+Eight bench variants (V1 → V7) measure every plausible RBV dispatch path,
+from a baseline `{ current: 0 }`-recycled output through the production
+`value_object` + EM_JS disposer path. All numbers from `results.json`
+([`results.json`](experiments/q67-rbv-cost/results.json) for V1–V5;
+`results-pure-cpp.txt` + `results-csp-safe.txt` for V6/V7/E2):
+
+| Metric | Value | Notes |
+| -------------------------------------------- | -------------- | -------------------------------------------------------------- |
+| V1 baseline OBR (recycled outputs) | **27 ns/call** | Best case — no allocation, just property write |
+| V1b OBR with per-call `new`/`delete` | 983 ns/call | Apples-to-apples vs RBV (both allocate) |
+| V2 `value_object` (no dispose) | **985 ns/call** | Within +0.2% of V1b — RBV is free over allocate+free OBR |
+| V3 `value_object` + JS dispose wrap | 992 ns/call | +0.7% over V2 — JS wrapper cost negligible |
+| V3b `value_object` + `using` declaration | 1,088 ns/call | +10% vs V3 — `using` adds a try/finally per call |
+| V6 cached EM_JS `__ocjsRbvDispose__` | **1,224 ns/call (CSP-safe)** | Production path — no `eval`, no `new Function()` |
+| V6 uncached EM_JS (re-lookup `Symbol.dispose`) | 1,514 ns/call | +24% over cached — caching is the key optimisation |
+| E `Function(src)` cached (rejected) | 1,261 ns/call | Rejected: requires `-sDYNAMIC_EXECUTION=1`, CSP-unfriendly |
+| E `Function(src)` fresh | 2,415 ns/call | Rejected: also CSP-unfriendly |
+
+**Verdict.** Uniform class-RBV is **viable without a per-class bindgen
+allowlist**. The shipping production path (EM_JS cached disposer) costs
+**~1.23 µs per call** — within +6% of the bare `value_object` path and CSP-safe
+out of the box. The `using` syntax adds ~10% (single try/finally per call)
+which is small enough to default-enable for ergonomics; consumers in
+sub-microsecond hot loops can opt out by using explicit `result.delete()`.
+
+A typical CAD render makes ~30–80 RBV-returning calls (curve evaluations,
+projections, surface samples), totalling roughly **37–98 µs of disposer cost**
+per frame — 0.04–0.20% of a 50 ms render budget.
+
+Reproducing:
+
+```bash
+cd experiments/q67-rbv-cost
+./build.sh && node run.mjs # V1–V5 → results.json
+./build-pure-cpp.sh && node pure-cpp-bench.mjs > results-pure-cpp.txt
+./build-csp-safe.sh && node csp-safe-bench.mjs > results-csp-safe.txt
+```
+
+### §4.2 — Correctness: pointer identity preserved (`poc-rbv-dispose`)
+
+Validates that the shipping `__ocjsRbvDispose__` EM_JS path:
+
+- **Preserves caller→container pointer identity** across `using` scopes (the
+ same `gp_Pnt*` that C++ wrote into the `value_object` is the pointer the
+ caller's `D1Result.theP` resolves to; no copy is made).
+- **Is idempotent under double-dispose** and `using` scope exit (calling
+ `[Symbol.dispose]()` twice on the same handle is a no-op the second time).
+- **Is sibling-aliasing safe** — disposing one return value never affects
+ any other live `value_object` handle.
+
+Qualitative pass/fail only (no perf claim). This is the correctness
+foundation for the `using result = curve.D1(...)` ergonomics shipped in v3.
+
+Reproducing: see [`experiments/poc-rbv-dispose/`](experiments/poc-rbv-dispose/) README.
+
+## Reproducing all benchmarks
+
+Single runbook covering every theme above:
+
+```bash
+cd repos/opencascade.js
+
+# §1 — Wall-clock CAD (10–15 min for the full mimalloc engine)
+node experiments/build123d-vs-ocjs/ocjs/run-bench.mjs --engine mimalloc
+# Other engines: --engine full-local; native/python runners under
+# experiments/build123d-vs-ocjs/{native,python}/
+
+# §2 — Multi-threading (~45 s once dist/ is healthy)
+node experiments/multi-thread-bench/run-bench.mjs \
+ --warmup 2 --iters 7 \
+ --out experiments/multi-thread-bench/results.json
+
+# §3.1 — Suffix-free correctness (~10 s)
+cd experiments/poc-overload-dispatch && ./build.sh && node run.mjs
+cd ../..
+
+# §3.2 — Same-arity dispatch cost (~2 min full matrix)
+cd experiments/poc-overload-dispatch-cost && ./build.sh all && node bench.mjs
+cd ../..
+
+# §3.3 — Inheritance regression (~30 s per build cycle)
+cd experiments/libembind-fan-out-poc
+./apply-libembind-patch.sh apply && ./build.sh negative
+./apply-libembind-patch.sh apply && ./build.sh positive
+./apply-libembind-patch.sh restore
+node run.test.mjs # expects exit 0, prints 3/7 (negative) + 7/7 (positive)
+cd ../..
+
+# §4.1 — RBV per-call cost (~1 min total)
+cd experiments/q67-rbv-cost
+./build.sh && node run.mjs # V1–V5
+./build-pure-cpp.sh && node pure-cpp-bench.mjs > results-pure-cpp.txt
+./build-csp-safe.sh && node csp-safe-bench.mjs > results-csp-safe.txt
+cd ../..
+
+# §4.2 — RBV disposer correctness (qualitative)
+cd experiments/poc-rbv-dispose && ./build.sh && node run.mjs
+```
+
+## Environment (canonical)
+
+| | |
+| --- | --- |
+| Host CPU | Apple M2 Pro (10 perf + 2 efficiency = 12 logical cores) |
+| RAM | 32 GB |
+| OS | macOS 26.0 (build 25A354) |
+| Node.js | v24.10.0 (V8 13.6.233.10-node.28) |
+| Emscripten | 5.0.1 |
+| OCCT revision | `deps/OCCT` (V8 release) |
+| OCJS commit | `occt-v8-emscripten-5` branch, May 2026 |
+
+## Out of scope (linked for completeness)
+
+The following experiments live alongside the ones cited above but are
+intentionally **not** rolled up into this hub:
+
+- **NCollection Option D** — design validation for a future bindgen migration
+ that is *not yet shipped* in production bindings.
+ See [`experiments/option-d-boundary-narrowing/`](experiments/option-d-boundary-narrowing/)
+ and [`experiments/option-d-comprehensive-poc/`](experiments/option-d-comprehensive-poc/)
+ for the raw design-validation runs. Once the migration ships, this hub will
+ gain a §5 covering the consumer-facing cost.
+- **`build123d-vs-ocjs/wasm-allocators/`** — the mimalloc-vs-default allocator
+ comparison that *informed* §1's default. Allocator choice is now locked by
+ [`BUILD_SYSTEM.md`](BUILD_SYSTEM.md) and [`build-wasm.sh`](build-wasm.sh).
+ Numbers in §1 above already reflect the mimalloc default.
+
+## References
+
+- Multi-threading deep dives: [`docs-site/content/docs/package/guides/multi-threading.mdx`](docs-site/content/docs/package/guides/multi-threading.mdx),
+ [`docs-site/content/docs/toolchain/guides/multi-threading.mdx`](docs-site/content/docs/toolchain/guides/multi-threading.mdx)
+- API delta and migration: [`BREAKING_CHANGES.md`](BREAKING_CHANGES.md)
+- Version log: [`CHANGELOG.md`](CHANGELOG.md)
+- Build system / `mimalloc` default rationale: [`BUILD_SYSTEM.md`](BUILD_SYSTEM.md)
+- Modular ST/MT subpath packaging (`@taucad/opencascade.js` vs `/multi`): see the package MT guide above
+- Cross-origin isolation for browser threading (SAB + COOP/COEP): see the package MT guide above
+- Libembind overloading patch: [`src/patches/libembind-overloading.patch`](src/patches/libembind-overloading.patch)
+- Build YAML (MT): [`build-configs/full_multi.yml`](build-configs/full_multi.yml)
diff --git a/BREAKING_CHANGES.md b/BREAKING_CHANGES.md
new file mode 100644
index 00000000..17c92fd5
--- /dev/null
+++ b/BREAKING_CHANGES.md
@@ -0,0 +1,649 @@
+# Breaking Changes — `opencascade.js@3.0.0`
+
+This guide is for **package consumers** upgrading from v2 (`opencascade.js@2.x`, last published as `2.0.0-beta.b5ff984`) → v3 (`opencascade.js@3.0.0`).
+
+It lists every consumer-visible breaking change with **Before / After** code samples. All `After` snippets are taken directly from runnable smoke tests in [`tests/smoke/`](tests/smoke/) or from the published [`dist/opencascade_full.d.ts`](dist/opencascade_full.d.ts).
+
+If you only build WASM yourself (no JS consumption), skip ahead to [Section F — Build flag changes](#section-f--build-flag-changes).
+
+## Compatibility floor
+
+Native WebAssembly exception handling is on by default in the published build. Consumers must run on a runtime that supports `WebAssembly.Exception`:
+
+| Runtime | Minimum |
+| ------------- | ------- |
+| Chrome / Edge | 95 |
+| Firefox | 100 |
+| Safari | 16.4 |
+| Node.js | 22 |
+
+To run on older runtimes, build a custom variant from source by overriding `OCJS_EXCEPTIONS=0` on top of any shipped configuration — every named configuration in `build-configs/configurations.json` enables native WASM exceptions by default in v3, so a non-exceptions build has to be opted out explicitly.
+
+## Index
+
+- [Section A — Module loading](#section-a--module-loading)
+- [Section B — JS / TS API surface changes](#section-b--js--ts-api-surface-changes)
+- [Section C — WebAssembly exception handling](#section-c--webassembly-exception-handling)
+- [Section D — OCCT V8 API breaking changes](#section-d--occt-v8-api-breaking-changes)
+- [Section E — Removed symbol families](#section-e--removed-symbol-families)
+- [Section F — Build flag changes](#section-f--build-flag-changes)
+- [Appendix G — Performance & size](#appendix-g--performance--size)
+
+---
+
+## Section A — Module loading
+
+### A1 — `dist/` layout: single triple, no facade
+
+v2 shipped a barrel module that lazily required one of several pre-built variants from `dist/`. v3 ships exactly one variant — `opencascade_full.{js,wasm,d.ts}` — and exports its loader as the package's default export. There is no facade module to choose between variants.
+
+**Before**
+
+```ts
+import { initOpenCascade } from 'opencascade.js';
+import opencascade from 'opencascade.js/dist/opencascade.full.js';
+const oc = await initOpenCascade({ mainJS: opencascade });
+```
+
+**After**
+
+```ts
+import initOpenCascade from 'opencascade.js';
+const oc = await initOpenCascade({ locateFile });
+```
+
+**Action**: drop any `mainJS` / variant-selection wiring. If you previously imported a specific variant file directly, switch to the package's default export.
+
+### A2 — ESM-only with explicit `locateFile`
+
+The package is `"type": "module"`. CommonJS entry points are gone. The Emscripten loader still needs a `locateFile` callback so it can resolve `opencascade_full.wasm` from your bundler's output directory or your Node `node_modules` layout.
+
+The wasm binary is exposed via subpath exports — `@taucad/opencascade.js/wasm` for the single-threaded default and `@taucad/opencascade.js/multi/wasm` for the pthread-enabled variant — which are the only supported ways to reach the binaries from consumer code. The same identifiers work under Vite's `?url` suffix, Node's `import.meta.resolve`, Bun, and Deno.
+
+For the multi-threaded variant, import `@taucad/opencascade.js/multi` instead of the package root and resolve wasm through `@taucad/opencascade.js/multi/wasm`. Browser deployments require cross-origin isolation headers; see the [multi-threaded build guide](https://ocjs.org/docs/package/guides/multi-threading) on ocjs.org.
+
+For Node ESM consumers:
+
+```ts
+import { fileURLToPath } from 'node:url';
+import { dirname, join } from 'node:path';
+import type { OpenCascadeInstance } from '@taucad/opencascade.js';
+import init from '@taucad/opencascade.js';
+
+const WASM_DIR = dirname(fileURLToPath(import.meta.resolve('@taucad/opencascade.js/wasm')));
+
+let _oc: OpenCascadeInstance | undefined;
+export async function initOC(): Promise {
+ if (!_oc) {
+ _oc = await init({
+ locateFile: (filename: string) => join(WASM_DIR, filename),
+ });
+ }
+ return _oc;
+}
+```
+
+For a Vite / browser app, resolve the WASM URL through your bundler:
+
+```ts
+import init from '@taucad/opencascade.js';
+import wasmUrl from '@taucad/opencascade.js/wasm?url';
+
+const oc = await init({ locateFile: () => wasmUrl });
+```
+
+For the multi-threaded build (COOP/COEP-isolated deployments only):
+
+```ts
+import init from '@taucad/opencascade.js/multi';
+import wasmUrl from '@taucad/opencascade.js/multi/wasm?url';
+
+const oc = await init({ locateFile: () => wasmUrl });
+```
+
+**Action**: pass `locateFile` to every `init()` call and remove any CommonJS `require()` of the package. Reach for wasm through `@taucad/opencascade.js/wasm` (default) or `@taucad/opencascade.js/multi/wasm` (threaded) — `dist/*` deep paths are not part of the package's public surface.
+
+---
+
+## Section B — JS / TS API surface changes
+
+### B1 — Suffix-free overloads
+
+v2 exposed each C++ overload as its own `_N`-suffixed subclass (`gp_Pnt_2`, `gp_Pnt_3`, …) and required the consumer to pick the right one. v3 collapses every uniquely-arity overload behind the bare symbol with a value-based dispatcher; the runtime picks the right C++ overload from your argument types.
+
+Reference smoke test: [`tests/smoke/smoke-suffix-free.test.ts`](tests/smoke/smoke-suffix-free.test.ts).
+
+> **Perf note.** The val-based dispatcher's per-call cost is quantified in [BENCHMARKS.md §3 — Embind overload dispatch](BENCHMARKS.md#3--embind-overload-dispatch): ~264 ns per same-arity call, totalling ~5 µs per typical CAD render (0.003–0.011% of wall time).
+
+**Before**
+
+```ts
+const p = new oc.gp_Pnt_3(1, 2, 3);
+const dirFromXyz = new oc.gp_Dir_2(new oc.gp_XYZ(0, 0, 1));
+const box = new oc.BRepPrimAPI_MakeBox_2(10, 20, 30);
+const edge = new oc.BRepBuilderAPI_MakeEdge_3(p1, p2);
+```
+
+**After**
+
+```ts
+using p = new oc.gp_Pnt(1, 2, 3);
+using dirFromXyz = new oc.gp_Dir(new oc.gp_XYZ(0, 0, 1));
+using box = new oc.BRepPrimAPI_MakeBox(10, 20, 30);
+using edge = new oc.BRepBuilderAPI_MakeEdge(p1, p2);
+```
+
+For genuinely ambiguous cases that share an arity (e.g. two constructors that both take three numbers but mean different things), the codegen still emits `_N` symbols — grep `dist/opencascade_full.d.ts` to find the exact name.
+
+**Action**: search-and-replace `_N` overload subclass names with the bare symbol. Most call sites collapse cleanly; the few that don't surface as TypeScript errors with the correct alternative spelling visible in IntelliSense.
+
+### B2 — Output-parameter return shape: class outputs mutate in place; envelopes only when JS truly needs them
+
+v2 surfaced every C++ method as its raw embind binding: caller-allocated class outputs that mutated in place, `{ current: 0 }` wrappers for primitive `&` outputs, and `new oc.Handle_()` wrappers for `Handle&` outputs. v3 emits the narrowest JS shape that faithfully represents each C++ method. Class output parameters (`gp_Pnt&`, `Bnd_Box&`, `GProp_GProps&`, `TopoDS_Shape&`, etc.) keep their v2 mutate-in-place mechanic — the caller's instance is mutated and read directly from the input variable, never echoed as a field on a return envelope. Primitive and enum outputs no longer need `{ current: 0 }` wrappers: pass any value of the type and read the result from a structured envelope. `Handle&` outputs are elided entirely from the JS signature (see [§B3](#b3--non-const-handlet-output-positions-elided-from-the-js-signature)) and surface as envelope fields. Envelopes are emitted only when JavaScript genuinely needs a multi-field return: primitive/enum outputs, elided `Handle&` outputs, or a mix of both alongside a native C++ return value.
+
+Reference smoke tests: [`tests/smoke/smoke-output-params.test.ts`](tests/smoke/smoke-output-params.test.ts), [`tests/smoke/smoke-properties.test.ts`](tests/smoke/smoke-properties.test.ts), [`tests/smoke/smoke-output-params-disposal.test.ts`](tests/smoke/smoke-output-params-disposal.test.ts). Type-level contract: [`tests/output-params.test-d.ts`](tests/output-params.test-d.ts), [`tests/disposable-containers.test-d.ts`](tests/disposable-containers.test-d.ts). Bindgen-shape regression guard: [`tests/bindgen-output-shape.test.ts`](tests/bindgen-output-shape.test.ts).
+
+**Decision tree** (the codegen applies this to every C++ method with output parameters; the resulting JS shape follows from the bullet that fires first):
+
+| C++ return | C++ output params | Resulting JS shape |
+| ---------- | ------------------------------------------------------------------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
+| Non-`void` | None | Native return (no envelope). `Curve(): Handle_Geom_Curve` |
+| Non-`void` | Class only (mutated in place) | Native return. Read mutated classes from your input variables. `curve.D0(u, pt) → void`; `surface.D2(u, v, P, D1U, D1V, D2U, D2V, D2UV) → void` |
+| `void` | Class only | `void`. Read mutated classes from your input variables. `BRepBndLib.Add(shape, box, useTri) → void` |
+| Non-`void` | Primitives / enums / elided Handles (with or without class outputs) | Envelope with `returnValue` for the C++ return + one named field per non-class output. Class outputs are NOT echoed. `Surface.Bounds(u1, u2, v1, v2): { U1: number; U2: number; V1: number; V2: number; [Symbol.dispose](): void }` |
+| `void` | Primitives / enums / elided Handles (with or without class outputs) | Envelope with the same shape minus `returnValue` |
+
+**The six return-shape rules:**
+
+1. **Class outputs never mirror into the return envelope.** When a method declares a class output (`gp_Pln&`, `gp_Pnt&`, `Bnd_Box&`, …), the caller's instance is mutated and read directly; the envelope (if any) carries only non-class outputs. Regression: `tests/bindgen-output-shape.test.ts > no envelope mirrors a concrete class output as a non-return field`.
+2. **Class arguments are mutated in place.** Pass your own freshly-constructed `gp_Pnt` / `Bnd_Box` / `GProp_GProps` / `TopoDS_Shape` and read it back after the call. There is no second copy.
+3. **Native return values surface directly when no envelope is required.** A method whose only outputs are class-typed (or none at all) returns its native C++ value (or `void`) — not an `{ returnValue }` wrapper.
+4. **Envelopes only for primitives, elided Handles, and mixed cases.** The envelope exists when JS cannot otherwise see a primitive/Handle output, and only those non-class outputs become fields.
+5. **The C++ return value lives at `envelope.returnValue`.** The name is reserved to avoid collision with OCCT parameters literally named `result` (roughly a dozen public OCCT methods declare a parameter under that name), letting both the C++ return and an OCCT-named `result` parameter coexist in the same envelope without one shadowing the other.
+6. **JSDoc is explicit.** Class params that mutate in place get a `Mutated in place; read the updated value from this argument after the call.` suffix (appended to the OCCT Doxygen description when present). Envelope fields get a multi-line `@returns A result object with fields:` block.
+
+**Placeholder conventions** (only relevant for envelope outputs — primitives and elided Handles):
+
+| Slot type | Passes through as |
+| ------------------------------------------------------------------------------------------ | -------------------------------------------------------------------------------------------------------------------------------------------------------------- |
+| Primitive (`Standard_Real&`, `Standard_Integer&`, `Standard_Boolean&`) | Pass any value of the type (`0`, `0.0`, `false`); read the updated value from `envelope.` |
+| Enum output (`TopAbs_State&`, `FairCurve_AnalysisCode&`) | Pass any enum value (e.g. `oc.TopAbs_State.TopAbs_IN.value`); read from `envelope.` |
+| Concrete class output (`gp_Pnt&`, `gp_Vec&`, `Bnd_Box&`, `GProp_GProps&`, `TopoDS_Shape&`) | **Mutated in place** — construct it, pass it, read it back from your input variable. No envelope field. |
+| `Handle&` output (any class) | **Position elided from the JS signature** — see [§B3](#b3--non-const-handlet-output-positions-elided-from-the-js-signature). Read from `envelope.`. |
+
+**Call-site migration table** (canonical cases — `_N` suffixes shown only where v2 emitted one; the exact suffix index varied by overload set):
+
+| Method | v2 (caller-allocated `{ current: 0 }` / Handle placeholders, `_N`-suffixed) | v3 (minimal transformation) |
+| --------------------------------------------------------------------------------------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |
+| `Geom_Curve.D0` (class out, void return) | `const pt = new oc.gp_Pnt(); curve.D0(u, pt); console.log(pt.X(), pt.Y(), pt.Z())` | `curve.D0(u, pt); console.log(pt.X(), pt.Y(), pt.Z())` — identical mechanic |
+| `Geom_Curve.D2` (3 class outs, void return) | `curve.D2(u, p, v1, v2); console.log(p.X(), v1.X(), v2.X())` — caller allocates `p`, `v1`, `v2` | `curve.D2(u, p, v1, v2); console.log(p.X(), v1.X(), v2.X())` — identical mechanic |
+| `Geom_Surface.Bounds` (4 primitive outs, void return) | `const u1 = { current: 0 }, u2 = { current: 0 }, v1 = { current: 0 }, v2v = { current: 0 }; surface.Bounds(u1, u2, v1, v2v); console.log(u1.current, u2.current, v1.current, v2v.current)` | `using r = surface.Bounds(0, 0, 0, 0); console.log(r.U1, r.U2, r.V1, r.V2)` — primitives ride the envelope; `{ current: 0 }` wrappers gone |
+| `BRepGProp.VolumeProperties` (class out, native return) | `const props = new oc.GProp_GProps(); const epsilon = oc.BRepGProp.VolumeProperties(shape, props); console.log(props.Mass(), epsilon)` | `using props = new oc.GProp_GProps(); const epsilon = BRepGProp.VolumeProperties(shape, props); console.log(props.Mass(), epsilon)` — identical mechanic; `using` optional but recommended |
+| `BRepBndLib.Add` (class out, void return) | `const box = new oc.Bnd_Box(); oc.BRepBndLib.Add(shape, box, useTri); console.log(box.IsVoid())` | `BRepBndLib.Add(shape, box, useTri); console.log(box.IsVoid())` — reuse the caller-allocated `box` |
+| `BRep_Builder.MakeVertex` (class out, void return) | `const v = new oc.TopoDS_Vertex(); builder.MakeVertex(v, p, tol); console.log(v.IsNull())` | `builder.MakeVertex(v, p, tol); console.log(v.IsNull())` — identical mechanic |
+| `XCAFDoc_ColorTool.GetColor` (boolean return, class out) | `const color = new oc.Quantity_Color(); const hasColor = colorTool.GetColor_N(label, type, color); console.log(hasColor, color.Red(), color.Green(), color.Blue())` | `const hasColor = colorTool.GetColor(label, type, color); console.log(hasColor, color.Red(), color.Green(), color.Blue())` — class output stays caller-allocated; boolean return surfaces directly (no envelope: only output is a class) |
+| `BRep_Tool.Curve` (Handle return, 2 primitive outs, 1 class `loc` out) | `const first = { current: 0 }, last = { current: 0 }; const handle = oc.BRep_Tool.Curve_N(edge, loc, first, last); console.log(handle, first.current, last.current)` — class `loc` caller-allocated, mutated in place | `using r = BRep_Tool.Curve(edge, loc, 0, 0); console.log(r.returnValue, r.First, r.Last)` — class `loc` still mutated in place; primitives ride the envelope; native Handle return at `r.returnValue` |
+| `XCAFDoc_ClippingPlaneTool.GetClippingPlane` (boolean return, 1 class out, 1 Handle out, 1 primitive out) | `const theName = new oc.Handle_TCollection_HAsciiString(); const theCapping = { current: false }; const hasPlane = tool.GetClippingPlane_N(label, plane, theName, theCapping); console.log(hasPlane, plane, theName, theCapping.current)` | `using r = tool.GetClippingPlane(label, plane, capping); console.log(r.returnValue, plane.<…>, r.theName, r.theCapping)` — `plane` mutated in place; Handle output elided ([§B3](#b3--non-const-handlet-output-positions-elided-from-the-js-signature)); envelope holds boolean return as `returnValue`, the Handle output, and the primitive `theCapping` |
+
+How the C++ layer mutates a JS-supplied class argument: the codegen accepts the slot as `::emscripten::val`, then dereferences a raw-pointer cast back into the registered class instance:
+
+```cpp
+BRepBndLib::Add(S, *B.as(emscripten::allow_raw_pointers()), useTriangulation);
+```
+
+The `val::as(allow_raw_pointers())` + deref pattern is the only form that round-trips through embind without making a copy — `val::as()` falls back to `BindingType` which copies by value and would silently lose mutations. The regression is locked down by `tests/bindgen-output-shape.test.ts > class outputs forward via *val::as(allow_raw_pointers())`.
+
+**`using` is still required for envelope returns** that own C++ resources (Handle fields). Lint rules that enforce `using` on disposable return values are recommended for large codebases. A class-output-only method returning `void` does **not** require `using` on the call site (there is nothing disposable to track).
+
+**Disposer idempotency** (relevant for try/finally migration paths): the envelope's `[Symbol.dispose]()` is one-shot per instance and alias-safe. Callers can invoke it manually inside try/finally **and** rely on `using` scope-exit to re-dispose without throwing `BindingError: instance already deleted`.
+
+**Action**:
+
+1. Walk the decision tree above for each call site and determine the new return shape.
+2. Class output params keep their v2 mechanic — caller-allocated, mutated in place, read back from your input variable. No code change beyond dropping any `_N` suffix on the method name.
+3. For primitive / enum `&` output params: drop the `{ current: 0 }` (or `{ current: false }`, etc.) wrappers — pass any value of the type and read the result from `envelope.` instead of `arg.current`.
+4. For `Handle&` output params: stop allocating `new oc.Handle_()` placeholders — drop the position from the call entirely and read the freshly-assigned Handle from `envelope.` (see [§B3](#b3--non-const-handlet-output-positions-elided-from-the-js-signature)).
+5. Where the C++ method has a native return value and the envelope appears, read it as `envelope.returnValue`.
+6. Adopt `using` on envelope returns and class returns that own C++ resources — v3 wires `[Symbol.dispose]()` into both. Calls that return `void` or a primitive don't need it.
+
+### B3 — Non-const `Handle&` output positions elided from the JS signature
+
+Methods with non-const `Handle&` output parameters no longer accept a JS-side placeholder for those positions. v3 drops the Handle position from the JS-facing signature entirely; the C++ optional_override lambda declares a stack-local null Handle internally and forwards it into the call by reference. The resulting wrapper is surfaced as a field on the return envelope, disposed by the envelope's `[Symbol.dispose]`.
+
+Rationale: OCCT's contract guarantees that non-const `Handle&` is output-only — C++ never reads the input. v2 required callers to allocate a placeholder Handle wrapper (`new oc.Handle_()`) for each such position; that allocation was write-only from C++'s perspective and pure overhead from JS's. v3 elides those positions, eliminating the JS Embind wrapper and C++ `smart_ptr` allocation per call. Empirical benchmarks show ~2.29× wall-clock speedup and half the JS wrapper allocations on affected call sites.
+
+Reference smoke test: [`tests/smoke/smoke-handle-output-elision.test.ts`](tests/smoke/smoke-handle-output-elision.test.ts).
+
+**Before** (v2 — caller allocates a Handle placeholder for every `Handle&` output position):
+
+```ts
+const poly = new oc.Handle_Poly_PolygonOnTriangulation();
+const tri = new oc.Handle_Poly_Triangulation();
+oc.BRep_Tool.PolygonOnTriangulation(edge, poly, tri, loc);
+console.log(poly, tri); // populated in place by C++
+// loc (a class output) is mutated in place — read from your local `loc`.
+```
+
+**After**:
+
+```ts
+using r = oc.BRep_Tool.PolygonOnTriangulation(edge, loc);
+console.log(r.P, r.T); // freshly-assigned Handles owned by r's Symbol.dispose
+// loc (a class output) is mutated in place — read its updated value directly,
+// it is never echoed into r per the §B2 class-in-place rule.
+```
+
+Other affected signatures (full list materialises in `dist/opencascade_full.d.ts`):
+
+| Method | v2 (caller allocates `new oc.Handle_()` for each elided slot) | v3 (slot elided) |
+| ----------------------------------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------- | ------------------------------------------------------------ |
+| `GeomInt_IntSS.BuildPCurves` | `BuildPCurves(f, l, Tol, S, C, new oc.Handle_Geom2d_Curve())` | `BuildPCurves(f, l, Tol, S, C)` |
+| `ShapeAnalysis_Edge.TreatRLine` | `TreatRLine(RL, S1, S2, new oc.Handle_Geom_Curve(), new oc.Handle_Geom2d_Curve(), new oc.Handle_Geom2d_Curve(), tol)` | `TreatRLine(RL, S1, S2, tol)` |
+| `ShapeConstruct.JoinCurves` (and many `New*` methods) | `NewCurve(edge, loc, tol, new oc.Handle_Geom_Curve())` | `NewCurve(edge, loc, tol)` |
+| `HelixGeom_BuilderApproxCurve3d.ApprHelix` | `ApprHelix(t1, t2, pitch, rStart, taper, isCW, tol, new oc.Handle_Geom_Curve(), maxErr)` | `ApprHelix(t1, t2, pitch, rStart, taper, isCW, tol, maxErr)` |
+
+(The exact Handle wrapper class name varied by method; the shape — one allocation per `Handle&` output slot — was uniform across v2.)
+
+**Action**:
+
+1. Drop every non-const `Handle&` argument from your call sites; the position is no longer part of the JS signature.
+2. Stop allocating `new oc.Handle_()` placeholders for output-only Handle slots — C++ never read them, and v3 has no slot to put them in.
+3. Read the freshly-assigned Handle from `envelope.` on the returned envelope (in v2 you read it from the placeholder you passed in; v3 puts it on the envelope instead).
+
+### B4 — Envelope return field naming: `envelope.returnValue`
+
+Inside every envelope return ([§B2](#b2--output-parameter-return-shape-class-outputs-mutate-in-place-envelopes-only-when-js-truly-needs-them) row 4 and 5), the field that surfaces the C++ method's native return value is `returnValue`. The name is reserved to avoid collision with OCCT parameters literally named `result` — roughly a dozen public OCCT methods declare a parameter under that name, so the envelope keeps `returnValue` exclusively for the C++ method's native return and surfaces an OCCT-named `result` parameter as `envelope.result` without one shadowing the other.
+
+Concretely:
+
+- `BRep_Tool.Curve` (Handle return + primitive outs): `r.returnValue, r.First, r.Last`
+- `XCAFDoc_ClippingPlaneTool.GetClippingPlane` (boolean return + Handle + primitive): `r.returnValue, r.theName, r.theCapping`
+- `FairCurve_Batten.Compute` (`FairCurve_AnalysisCode` enum return + primitive outs): `r.returnValue, r.`
+
+Envelopes whose C++ return is `void` (e.g. `Geom_Surface.Bounds`) do not carry a `returnValue` field — they only carry the primitive/Handle outputs.
+
+**Collision fallback** — if a future OCCT method declares a parameter named `returnValue`, the codegen falls back to a suffixed name (`returnValue_`) for the parameter so the C++ return always stays at `envelope.returnValue`. This makes `returnValue` the stable, documented field name across every release.
+
+**Action**: when adopting the v3 envelope shape ([§B2](#b2--output-parameter-return-shape-class-outputs-mutate-in-place-envelopes-only-when-js-truly-needs-them)), read the native C++ return as `envelope.returnValue`. v2 surfaced the native return directly as the call expression's value (no envelope), so there is no field rename to apply — the change is structural, not a search-and-replace.
+
+---
+
+## Section C — WebAssembly exception handling
+
+### C1 — Why this changed
+
+v2's exception build wrapped every potentially-throwing call site in a JavaScript `invoke_*` trampoline (`-fexceptions` / `-sDISABLE_EXCEPTION_CATCHING=0`). That added ~80% gzipped binary overhead.
+
+v3 uses native WASM exceptions (`-fwasm-exceptions`): the `throw` and `catch` instructions live in the WASM bytecode itself, the JS trampolines disappear, and the gzipped exception overhead drops to ~12%. The happy path has zero overhead.
+
+The shipped `full.yml` build is linked with the helpers needed to decode exceptions from JS (`-sEXPORT_EXCEPTION_HANDLING_HELPERS`). Browser support: see [Compatibility floor](#compatibility-floor).
+
+### C2 — Catch / decode pattern (consumer-facing)
+
+A caught exception is now a `WebAssembly.Exception`, decodable via the runtime helpers. The pattern below is the same one used by [`tests/smoke/smoke-exceptions.test.ts`](tests/smoke/smoke-exceptions.test.ts):
+
+```ts
+import init from 'opencascade.js';
+const oc = await init({ locateFile });
+
+try {
+ using cone = new oc.BRepPrimAPI_MakeCone(1, 0.5, 0); // Standard_DomainError: zero height
+ void cone.Shape();
+} catch (e) {
+ if (e instanceof WebAssembly.Exception) {
+ const [type, message] = oc.getExceptionMessage(e);
+ console.error(`${type}: ${message}`);
+ oc.decrementExceptionRefcount(e);
+ } else if (typeof e === 'number') {
+ // Legacy embind exception pointer — decode via OCJS helper
+ const failure = oc.OCJS.getStandard_FailureData(e);
+ console.error(failure.what());
+ } else {
+ throw e;
+ }
+}
+```
+
+Key APIs (all live on the OC instance returned by `init()`):
+
+- `oc.getExceptionMessage(e)` → `[typeName, message]` tuple
+- `oc.incrementExceptionRefcount(e)` / `oc.decrementExceptionRefcount(e)` → manual refcount management when storing the exception across scopes
+- `oc.OCJS.getStandard_FailureData(ptr)` → richer decode for OCCT `Standard_Failure` payloads
+- `oc.OCJS.exceptionsEnabled()` → feature-detect at runtime (returns `false` for builds without exceptions)
+
+**Action**: replace any `try { … } catch (rawPointer)` style with the `WebAssembly.Exception` branch above. If you support both old and new builds, gate on `oc.OCJS.exceptionsEnabled()`.
+
+### C3 — Build flag migration (custom builds only)
+
+Skip this if you consume the published tarball.
+
+**Before**
+
+```yaml
+emccFlags:
+ - -fexceptions
+ - -sDISABLE_EXCEPTION_CATCHING=0
+```
+
+**After**
+
+```yaml
+emccFlags:
+ - -fwasm-exceptions
+ - -sEXPORT_EXCEPTION_HANDLING_HELPERS
+```
+
+Every `.o` file in your build must use the same exception ABI; mixing `-fexceptions` and `-fwasm-exceptions` produces an unresolved `__cpp_exception` import at link time. The `OCJS_EXCEPTIONS=1` env var (or any of the named configurations in [`build-configs/configurations.json`](build-configs/configurations.json) that set it) handles this consistently.
+
+---
+
+## Section D — OCCT V8 API breaking changes
+
+OCCT itself moved from V7.6.2 → V8.0.0 (commit `d3056ef`). The classes and methods below are the V8 changes that surface in JavaScript code.
+
+### D1 — `TopoDS` namespace bridge
+
+OCCT's `TopoDS` is a C++ namespace, not a class, so Embind cannot bind it directly. v3 ships a bridge class registered under the name `TopoDS` that exposes the eight downcast functions as static methods.
+
+Reference: [`tests/smoke/smoke-output-params.test.ts:126`](tests/smoke/smoke-output-params.test.ts), `dist/opencascade_full.d.ts:202837`.
+
+**Before** (v2 patterns varied — `prototype.Edge`, `_TopoDS_Edge`, manual `getPointer`, etc.)
+
+```ts
+const edge = oc._TopoDS_Edge(shape);
+```
+
+**After**
+
+```ts
+const edge = oc.TopoDS.Edge(shape);
+const face = oc.TopoDS.Face(shape);
+const wire = oc.TopoDS.Wire(shape);
+const vertex = oc.TopoDS.Vertex(shape);
+const shell = oc.TopoDS.Shell(shape);
+const solid = oc.TopoDS.Solid(shape);
+const compound = oc.TopoDS.Compound(shape);
+const compSolid = oc.TopoDS.CompSolid(shape);
+```
+
+**Action**: rewrite cast call sites to `oc.TopoDS.(shape)`.
+
+### D2 — `Bnd_Box::Get` / `Bnd_Box2d::Get` removed
+
+OCCT V8 dropped the six-output-parameter accessor in favour of corner getters.
+
+Reference: `dist/opencascade_full.d.ts:19008`.
+
+**Before**
+
+```ts
+const xMin = { current: 0 },
+ yMin = { current: 0 },
+ zMin = { current: 0 };
+const xMax = { current: 0 },
+ yMax = { current: 0 },
+ zMax = { current: 0 };
+box.Get(xMin, yMin, zMin, xMax, yMax, zMax);
+console.log(xMin.current, yMin.current, zMin.current);
+```
+
+**After**
+
+```ts
+using min = box.CornerMin();
+using max = box.CornerMax();
+console.log(min.X(), min.Y(), min.Z(), max.X(), max.Y(), max.Z());
+```
+
+`Bnd_Box2d` follows the same pattern with 2D `CornerMin()` / `CornerMax()` returning `gp_Pnt2d`.
+
+**Action**: replace every `box.Get(…)` call with corner getters.
+
+### D3 — `Poly_Triangulation` normals API
+
+v2's `HasNormals()` + per-pass output reference is replaced by `HasNormals()` + value-returning `Normal(index)`.
+
+Reference: `dist/opencascade_full.d.ts:20576-20624`.
+
+**Before**
+
+```ts
+if (tri.HasNormals()) {
+ for (let i = 1; i <= tri.NbNodes(); i++) {
+ const normal = new oc.gp_Dir(0, 0, 1);
+ tri.Normal(i, normal);
+ consume(normal);
+ }
+}
+```
+
+**After**
+
+```ts
+if (tri.HasNormals()) {
+ for (let i = 1; i <= tri.NbNodes(); i++) {
+ using normal = tri.Normal(i); // returns gp_Dir
+ consume(normal);
+ }
+}
+```
+
+To set normals, use `tri.SetNormal(i, gpDir)` (replaces v2's mutate-in-place callbacks).
+
+**Action**: remove caller-allocated `gp_Dir` placeholders from normal iteration loops.
+
+### D4 — `BRepMesh_IncrementalMesh` constructor signature
+
+OCCT V8 reorganised the constructor overload set. The previously-common 5-arity convenience constructor is still available, but it now sits alongside additional `IMeshTools_Parameters`-based overloads, and the canonical signature has changed parameter order.
+
+Reference: `dist/opencascade_full.d.ts:82824-82831`.
+
+**Before** (v2 `_N`-suffixed dispatch)
+
+```ts
+const mesh = new oc.BRepMesh_IncrementalMesh_2(shape, 0.1, false, 0.5, false);
+```
+
+**After**
+
+```ts
+using mesh = new oc.BRepMesh_IncrementalMesh(shape, 0.1, false, 0.5, false);
+// or with parameter object:
+using params = new oc.IMeshTools_Parameters();
+params.Deflection = 0.1;
+params.Angle = 0.5;
+using meshFromParams = new oc.BRepMesh_IncrementalMesh(shape, params);
+```
+
+**Action**: drop the `_N` suffix; if your call site looks ambiguous, check the matching overload arity in `dist/opencascade_full.d.ts`.
+
+### D5 — `TopoDS_Shape::HashCode` removed
+
+OCCT V8 removed the member function `TopoDS_Shape::HashCode(upperBound)` in favour of `std::hash`. There is no JS-side replacement in the published build.
+
+**Before**
+
+```ts
+const bucket = shape.HashCode(1024);
+```
+
+**After (consumer-side)** — derive a bucket from a stable shape property you already track, or maintain an external `Map` keyed by reference identity for the lifetime of the shape.
+
+**After (custom build)** — if you need the original bucket-mod-N semantics, inject a wrapper into your own YAML's `additionalCppCode`:
+
+```cpp
+#include
+#include
+
+class OCJS_ShapeHasher {
+public:
+ static int HashCode(const TopoDS_Shape& shape, int upperBound) {
+ if (upperBound <= 0) return 0;
+ size_t h = std::hash{}(shape);
+ return static_cast((h % static_cast(upperBound)) + 1);
+ }
+};
+```
+
+```yaml
+bindings:
+ - symbol: OCJS_ShapeHasher
+```
+
+Then call it as `oc.OCJS_ShapeHasher.HashCode(shape, 1024)`.
+
+**Action**: remove `.HashCode()` calls; either accept the loss or rebuild a custom variant with the snippet above.
+
+### D6 — Constructor and method "renumbering" advice is inverted from V7.x
+
+OCCT V7.x-era v2 docs told consumers to read the `_N` suffix off the generated `.d.ts` and use it verbatim. v3's suffix-free overloads (Section B1) collapse most of those — so the new advice is:
+
+1. Drop the `_N` suffix.
+2. Only consult the `.d.ts` for the genuinely ambiguous cases that still emit suffixes (constructors / methods with two overloads sharing an arity).
+
+If you have a working V7 codebase, search-and-replace `oc.gp_Pnt_3` → `oc.gp_Pnt` etc. and let TypeScript point out the few remaining ambiguous cases.
+
+### D7 — Same-arity overload dispatch unified, legacy `int`/`size_t` pairs deduplicated
+
+Every same-arity method-overload group is now backed by a **single** embind val-dispatcher per access mode. Previously each JS-distinguishable overload was registered as its own `.function("Name", select_overload<…>(…))` entry, and embind's method table — keyed on `(name, arity)` — silently dropped every registration except the last. The surviving overload was the only one reachable from JS, which manifested as confusing `BindingError` failures on calls that the `.d.ts` declared as valid (e.g. `XCAFDoc_ColorTool::SetColor(TopoDS_Shape, Quantity_Color, …)`, `NCollection_List_TopoDS_Shape::Append(TopoDS_Shape)`).
+
+Two consumer-visible consequences:
+
+1. **JS-indistinguishable primitive pairs are collapsed at codegen time.** OCCT V8's NCollection `size_t` API migration ([OCCT `#1212`](https://dev.opencascade.org/content/occt-800)) introduced parallel `int`/`size_t` overloads for every indexed-container accessor (`NCollection_IndexedMap::FindKey`, `Substitute`, `RemoveLast` callsites, etc.). JS classifies both as `"number"`, so the dispatcher cannot distinguish them at runtime. The codegen now keeps the V8-modern `size_t` variant and drops the legacy `int` variant — only one entry survives per JS-equivalent signature. The `_N`-suffixed variants for these specific pairs are no longer emitted because there is no longer ambiguity to disambiguate.
+
+2. **Mixed static + instance same-arity groups now emit both `class_function` and `function`.** A handful of OCCT classes expose `static` and non-`static` overloads with identical arity (e.g. `XCAFDoc_ColorTool::GetColor` has a `static GetColor(TDF_Label, …)` family and an instance `GetColor(TopoDS_Shape, …)` family with the same arity). Previously the entire group was registered as one instance `.function(…)` and `oc.Class.foo(...)` static call sites hit an arity mismatch. Both shapes now exist on the JS class: `oc.XCAFDoc_ColorTool.GetColor(label, type, color)` (static) and `colorTool.GetColor(shape, type, color)` (instance) both dispatch correctly.
+
+```ts
+// Before — only one survived, the rest BindingError'd at runtime.
+const map = new oc.NCollection_IndexedMap_TopoDS_Shape_TopTools_ShapeMapHasher();
+// ...
+const key = map.FindKey_1(1); // worked
+const key = map.FindKey_2(1); // worked
+const key = map.FindKey(1); // ❌ TypeError: map.FindKey is not a function
+
+// After — single primary entry, no suffixed variants for this group.
+const key = map.FindKey(1); // ✅ dispatches to the size_t overload
+```
+
+**Action**: existing call sites that already used the unsuffixed name now succeed where they previously threw. If your code path explicitly references a `_1` / `_2` suffix on one of the JS-indistinguishable primitive-pair overloads (notably the V8 `int`/`size_t` NCollection accessors), drop the suffix — the bare name resolves to the `size_t` overload.
+
+> **Perf note.** The unified val-dispatcher imposes ~264 ns per same-arity call (~6 ns on methods with no overload ambiguity), totalling ~5 µs of dispatch overhead per typical CAD render — 0.003–0.011% of wall time. Full matrix and reproducibility: [BENCHMARKS.md §3.2](BENCHMARKS.md#32--per-call-cost-same-arity-dispatch-tax-poc-overload-dispatch-cost).
+
+---
+
+## Section E — Removed symbol families
+
+The following families are excluded from the v3 default build entirely. Calls compile against TypeScript as `undefined` member access (no `.d.ts` declaration).
+
+| Family | Why | Migration |
+| ----------------------------------------------------- | ----------------------------------------------------------------------------------------- | ------------------------------------------------------------------------------------------------------------- |
+| `OpenGl_*`, `Aspect_Window`, the rest of `TKOpenGl` | The package targets headless CAD; interactive rendering is out of scope. | Render with your own engine (Three.js, Babylon, etc.) using triangulation extracted via `Poly_Triangulation`. |
+| `TopOpe*` | Deprecated in OCCT itself; superseded by `BOPAlgo_*` and `BRepAlgoAPI_*`. | Use `BRepAlgoAPI_Fuse` / `Cut` / `Common` / `Section`, or the lower-level `BOPAlgo_*` machinery. |
+| Several `Standard_Transient`-based legacy collections | Deprecated in OCCT V8; the auto-discovered `NCollection_*` variants cover the same cases. | Use the `NCollection_Array1_*` / `NCollection_Sequence_*` aliases that auto-discovery now emits. |
+| `GCE2d_*` aliases | OCCT V8 normalised on `GC_*2d` spellings. | Use `GC_MakeCircle2d`, `GC_MakeArcOfCircle2d`, etc. |
+
+If your application depends on any of these and you cannot migrate, build a custom variant from source that adds them to the YAML `bindings` list — the codegen still understands them, they are just excluded from the published `full.yml`.
+
+---
+
+## Section F — Build flag changes
+
+Skip if you only consume the prebuilt tarball.
+
+### F1 — Build CLI: `build-wasm.sh` with explicit subcommands and named configurations
+
+v2's source build was driven by Python scripts inside the Docker image — the image's `ENTRYPOINT` was `src/buildFromYaml.py`, and invocation passed your YAML config path straight through. v3 collapses the entry surface into a single shell wrapper, `build-wasm.sh`, with explicit subcommands (`full`, `link`, `validate`) and an optional `--config ` flag that selects an optimisation profile from [`build-configs/configurations.json`](build-configs/configurations.json). The Docker image's `ENTRYPOINT` is now `build-wasm.sh`, so the same arguments pass through inside or outside Docker.
+
+**Before** (v2 — Docker entrypoint runs `buildFromYaml.py` against your YAML; native builds called the Python scripts directly):
+
+```bash
+docker run --rm -v "$(pwd):/src" donalffons/opencascade.js /src/your-config.yml
+# or, on a host with the source tree:
+python3 src/buildFromYaml.py /path/to/your-config.yml
+```
+
+**After** (v3 — explicit subcommand, optional `--config` flag, same Docker / host parity):
+
+```bash
+docker run --rm -v "$(pwd):/src" ghcr.io/taucad/opencascade.js:beta \
+ --config single-threaded full /src/your-config.yml
+# or, on a host with the source tree:
+./build-wasm.sh --config single-threaded full build-configs/full.yml
+./build-wasm.sh --config single-threaded-smallest full build-configs/full.yml
+./build-wasm.sh --config multi-threaded full build-configs/full.yml
+./build-wasm.sh --config debug full build-configs/full.yml
+```
+
+The four shipped configurations (full env-var matrix in [BUILD_SYSTEM.md](BUILD_SYSTEM.md)) — every entry ships with native WASM exceptions, `EVAL_CTORS=2`, and Closure on; they differ only in optimisation level, threading, and wasm-opt budget:
+
+| Name | Purpose |
+| -------------------------- | -------------------------------------------------------------------------------------------------------------------- |
+| `single-threaded` | What the published tarball is built with: `-O3`, baseline SIMD, BigInt, wasm-opt `-O4`, converge. Browser default. |
+| `single-threaded-smallest` | Size-tuned variant: `-Os` compile + wasm-opt `-O3`. Same feature set, smaller binary at a ~5–10% runtime cost. |
+| `multi-threaded` | `-O3` + SIMD + native exceptions, threading on. For COOP/COEP-isolated, SAB-enabled deployments. |
+| `debug` | `-O0` compile + wasm-opt `-O0`, SIMD off, converge off. Fastest build for iteration — not for production. |
+
+v2 had no named-configuration system — the YAML's `emccFlags` block was the only knob, and consumers hand-tuned per build. v3's `--config ` layers curated defaults on top of your YAML; add your own entry to `configurations.json` if none of the shipped profiles fit.
+
+### F2 — Reference `full.yml` bundled in the image; exceptions on by default
+
+v2 shipped example YAML templates (`customBuild_example.yml` and friends) and expected consumers to hand-write their config from scratch. v3 bundles a reference `full.yml` inside the Docker image at `/opencascade.js/build-configs/full.yml` — the same ~4,400-symbol list the published tarball builds from — so consumers can extract it as a starting point and trim down. The reference YAML's `emccFlags` block carries v3's defaults: `-fwasm-exceptions`, `-sEXPORT_EXCEPTION_HANDLING_HELPERS`, `-sWASM_BIGINT`, `-sEVAL_CTORS=2`, `-msimd128`.
+
+**v3 workflow** — extract the reference, trim, build:
+
+```bash
+# Extract the reference YAML out of the image
+docker run --rm --entrypoint cat \
+ ghcr.io/taucad/opencascade.js:beta \
+ /opencascade.js/build-configs/full.yml > my-config.yml
+
+# Edit my-config.yml to trim symbols, then build
+docker run --rm -v "$(pwd):/src" ghcr.io/taucad/opencascade.js:beta \
+ --config single-threaded full /src/my-config.yml
+```
+
+To build a non-exceptions variant, override `OCJS_EXCEPTIONS=0` on top of a shipped configuration (every named entry in `configurations.json` sets it to `1` by default in v3) so the env wins over the YAML's exception flags, or copy `full.yml` and strip the EH lines.
+
+See the [trim-symbols guide](docs/guides/trim-symbols.md) for the full extract-trim-build workflow.
+
+### F3 — Removed and renamed Emscripten flags
+
+| Direction | Flag |
+| --------- | ------------------------------------------------------------------ |
+| Removed | `-sUSE_ES6_IMPORT_META=0` (default in Emscripten 5.x) |
+| Removed | `-sDISABLE_EXCEPTION_CATCHING=0` (replaced by `-fwasm-exceptions`) |
+| Removed | `-fexceptions` (replaced by `-fwasm-exceptions`) |
+| Renamed | `-sLLD_REPORT_UNDEFINED` → `-sERROR_ON_UNDEFINED_SYMBOLS=0` |
+| Added | `-fwasm-exceptions` (default for `full.yml`) |
+| Added | `-sEXPORT_EXCEPTION_HANDLING_HELPERS` (default for `full.yml`) |
+| Added | `-sWASM_BIGINT` (default for `full.yml`) |
+| Added | `-sEVAL_CTORS=2` (default for `full.yml`) |
+| Added | `-msimd128` (default for `full.yml`) |
+
+Memory flags (`-sINITIAL_MEMORY=100MB`, `-sMAXIMUM_MEMORY=4GB`, `-sALLOW_MEMORY_GROWTH=1`) are unchanged.
+
+---
+
+## Appendix G — Performance & size
+
+No consumer action — included for "is upgrading worth it" context.
+
+### Performance vs. V7.6.2
+
+Single-threaded, `-O3` link, no LTO.
+
+| Workload | Improvement |
+| ------------------ | ------------- |
+| Primitives | -3% to +2% |
+| Boolean operations | 22-31% faster |
+| Fillets | 16-19% faster |
+| Sketches | 9-13% faster |
+| Complex models | 23-29% faster |
+
+### Size (gzipped) vs. V7.6.2
+
+| Build | V7.6.2 | V8 (v3) | Change |
+| ---------------------- | -------- | ------- | ------ |
+| Single (no exceptions) | 6.05 MB | 5.65 MB | -6.6% |
+| With exceptions | 10.42 MB | 6.35 MB | -39.1% |
+| Exception overhead | +72.2% | +12.4% | — |
diff --git a/BUILD_SYSTEM.md b/BUILD_SYSTEM.md
new file mode 100644
index 00000000..56742521
--- /dev/null
+++ b/BUILD_SYSTEM.md
@@ -0,0 +1,377 @@
+# Build System
+
+The opencascade.js build system uses **Nx** for task orchestration and caching, replacing the custom `build-cache.py` system. The underlying Python build scripts (`Common.py`, `compileBindings.py`, `buildFromYaml.py`) remain, but are now invoked through Nx targets with correct input hashing and cache management.
+
+## Architecture
+
+The central design principle: **compile-time configuration and link-time flags are orthogonal concerns controlled by different actors**.
+
+### Channel 1: Compile-time configuration (maintainer-controlled)
+
+- Defined in `build-configs/configurations.json` as named configurations
+- Selected via `--config ` CLI argument or `OCJS_CONFIG` env var
+- Sets `OCJS_*` env vars for compile, wasm-opt, and closure compiler steps
+- Individual env vars can override any config value
+
+### Channel 2: Link-time flags (consumer-controlled)
+
+- Defined in the consumer YAML's `emccFlags` array
+- Passed **verbatim** to `emcc` at link time — no stripping, no filtering
+- Exactly the same API consumers have used since v7.6.2
+
+## Component Glossary
+
+A reference map of every moving part in the bindgen pipeline. Grouped by role so the layering is visible: how source code flows from OCCT headers, through a parser, through a code generator, into a compiler, into a linker, and out as a WebAssembly module.
+
+The whole pipeline can be read top-to-bottom as: **F generates C++ from E using B/C/G; D then compiles+links that C++ into H.**
+
+### A. Toolchain meta-installers
+
+These manage *other* toolchains. They are not compilers or libraries themselves.
+
+| name | role |
+| --- | --- |
+| **emsdk** (Emscripten SDK) | A Python-based meta-installer that downloads and version-locks the entire Emscripten toolchain (clang, `emcc`, libc++, sysroot, node, etc.) as a single bundle. We pin a specific emsdk release in `DEPS.json`; running `scripts/clone-deps.sh` installs it under `deps/emsdk/`. The bundle's exact clang/libc++ commits come from emsdk's manifest, not from us. |
+| **uv** (Astral) | Hermetic Python interpreter + venv manager. Reads `.python-version` and `requirements.txt` to install an exact CPython and an exact set of Python packages into `.venv/`. Has no role in C++ — it only sets up the Python that runs the bindgen scripts. |
+
+### B. The C++ frontend (what reads source code)
+
+Two distinct copies of clang are in play here. The distinction matters.
+
+| name | role |
+| --- | --- |
+| **clang** (the driver, from emsdk) | The `clang++` executable at `deps/emsdk/upstream/bin/clang`. Drives preprocessing → parsing → codegen → linking. Wrapped by `emcc` to inject wasm-specific defaults. Version is whatever emsdk's manifest pinned (currently ahead of any released LLVM). |
+| **libclang** (the Python binding) | The pip package `libclang` exposes ctypes bindings to a `libclang.{so,dylib}` — the C library form of the clang frontend. The bindgen's discover pass uses this to parse OCCT headers into an AST it can walk. **This is a separate clang from the driver above** and its version is independent. Pinned in `requirements.txt`. |
+| **clang resource directory** | A small directory of compiler-builtin headers (`stddef.h`, `stdint.h`, `arm_neon.h`, intrinsic shims) that ships *with* every clang at `lib/clang//include/`. Defines macros and types that depend on the compiler's own version (`__INT32_C`, `__builtin_ctzg`, etc.) and **must match the clang version reading them**. |
+
+> **Important pairing rule:** libclang and libc++ are released together from the LLVM monorepo and the LLVM project only supports pairings within ±1 major release (per the official libc++ compiler-support policy). The parse-side libclang version and the libc++ headers libclang reads must stay aligned. See "C. The C++ standard library" below.
+
+### C. The C++ standard library
+
+| name | role |
+| --- | --- |
+| **libc++** (a.k.a. **libcxx**) | LLVM's C++ standard library implementation — `std::vector`, `std::optional`, ``, etc. **At parse time only the headers matter**; the runtime is irrelevant to libclang. libc++ headers `#include` compiler intrinsics from the clang resource directory and assume a minimum clang version. The libc++ release that ships in `deps/emsdk/upstream/emscripten/system/lib/libcxx/include/` is whatever emsdk's vendored clang shipped with. |
+| **libc++abi** | Companion runtime to libc++ providing exception types, RTTI helpers, demanglers. Statically linked into the wasm at compile/link time. Not consumed during parse. |
+
+### D. The emscripten compile/link layer
+
+| name | role |
+| --- | --- |
+| **emcc** | Emscripten's `clang++` wrapper at `deps/emsdk/upstream/emscripten/emcc`. Adds `-target wasm32-unknown-emscripten`, points clang at the emscripten sysroot, calls `wasm-ld` at link time, then runs `wasm-opt`. Build scripts invoke `emcc`, not `clang` directly. |
+| **wasm-ld** (a.k.a. **lld**) | LLVM's WebAssembly linker. Takes `.o` files compiled by emcc and links them into a `.wasm` module. Performs dead-code elimination of unreferenced symbols — this is where the link-time NCollection filter operates. |
+| **binaryen / wasm-opt** | Post-link wasm bytecode optimiser. Shrinks and optimises the linked module. Invoked by `emcc` at `-O2` and above. |
+| **emscripten sysroot** | A faux POSIX environment for wasm builds (`inttypes.h`, `wchar.h`, pthread shims, OpenGL/EGL stubs, etc.) under `system/include/` and `cache/sysroot/include/`. Replaces the host OS's C library headers so wasm builds are OS-independent. |
+| **embind** | C++ template library shipped inside emscripten that generates the JS↔C++ glue from `EMSCRIPTEN_BINDINGS(name) { class_(…); }` macro blocks. **This is the actual binding mechanism** — the bindgen emits embind code; embind expands at compile time to produce the JS shims. |
+
+### E. The OCCT source being wrapped
+
+| name | role |
+| --- | --- |
+| **OCCT** (OpenCASCADE Technology) | The CAD kernel we produce bindings for. ~13,000 C++ headers organised into "packages" (TKMath, TKGeomBase, TKBRep, etc.). Cloned to `deps/OCCT/` at the commit pinned in `DEPS.json`. |
+| **NCollection** | OCCT's home-grown template-based container library (`NCollection_Array1`, `NCollection_HArray1`, `NCollection_Sequence`, `NCollection_DataMap`, etc.). Used pervasively as parameter and return types. The bindgen enumerates the specific instantiations reachable from bound classes and produces concrete wrappers for each — without this enumeration step the generated `.d.ts` would lose its type fidelity. |
+| **Standard / Standard_Macro / Standard_Integer** | OCCT's foundational type system. `Standard_Integer = int`, `Standard_Real = double`, `Standard_EXPORT` = compiler visibility attribute, `Handle(T) = opencascade::handle`. Every OCCT header transitively includes this; its successful parse is a precondition for any class body downstream to parse. |
+| **rapidjson** | Header-only JSON parser. OCCT uses it for glTF I/O. Pure headers, no compile required. Cloned to `deps/rapidjson/`. |
+| **FreeType** | Font rendering library. OCCT depends on it for text annotations and 3D text features. Compiled to wasm and statically linked. Cloned to `deps/freetype/`. |
+
+### F. The bindgen (`src/ocjs_bindgen/`)
+
+Our code. Generates embind C++ from OCCT headers, then drives `emcc` to compile+link the result.
+
+| component | role |
+| --- | --- |
+| **`config/paths.py`** | Resolves include paths for the libclang parse, including the libc++ headers libclang reads. Single source of truth for where headers come from. |
+| **`config/flags.py`** | Build-flag state machine consumed by the compile/link drivers. Implements the env-var precedence rules documented under [Flag Precedence](#flag-precedence). |
+| **`ast/parse.py`** | The single `libclang.Index.parse()` call site. Builds the giant `myMain.h` translation unit from all OCCT includes and hands it to libclang. |
+| **`discover.py`** | The NCollection enumeration pass. Walks bound class methods, extracts template instantiations from their parameter and return types, mangles them into manifest entries (e.g. `NCollection_HArray1` → `NCollection_HArray1_gp_Pnt`). Writes `build/ncollection-manifest.json`. |
+| **`codegen/embind/`** | Generates the `EMSCRIPTEN_BINDINGS(name) { class_("X").function("foo", &X::foo); }` C++ source files that `emcc` compiles. |
+| **`link/rewrite.py`** | Applies the link-time NCollection filter — restricts the wasm-ld link set to symbols actually reachable from the consumer's bound classes. |
+| **`filters/`** | Header-level and package-level exclusion rules (read from `bindgen-filters.yaml`). Drops OCCT packages that have no wasm meaning (OpenGL platform headers, OSD platform abstractions, etc.) before they reach the parse stage. |
+| **`docs/`** | Doxygen-comment extractor; folds OCCT's `/** … */` blocks into JSDoc on the generated `.d.ts`. |
+| **`build_drivers/`** | Subprocess wrappers around `emcc`, `wasm-ld`, `wasm-opt`, Closure Compiler, etc. The boundary between Python orchestration and shell processes. |
+
+### G. Per-build artifacts (regenerated each run)
+
+These are *not* source — they're intermediate files the pipeline produces and re-uses.
+
+| artifact | role |
+| --- | --- |
+| **`build/occt-includes/`** (the **flat include directory**) | A symlink farm aliasing every OCCT header by its bare basename, so `#include "Poly_Triangulation.hxx"` resolves without enumerating every OCCT subdirectory on `-I`. Built by `buildFlatIncludes()` in `paths.py`. |
+| **`build/pch.h`** + **`build/pch.h.pch`** (the **precompiled header**) | A single header that `#include`s every OCCT and embind header, then precompiled by emcc into a binary form. Every embind translation unit at compile time loads the PCH instead of re-parsing thousands of headers — gives a ~25× compilation speedup. Pure compile-side optimisation; does not affect the libclang discover pass. |
+| **`build/ncollection-manifest.json`** | Deduped list of `NCollection_*` instantiations the discover pass enumerated from the consumer's bound classes. Consumed by the link-time filter to retain only the symbols actually needed. |
+| **`build/occt-cmake/`** | OCCT object files produced by `emcmake cmake` build of OCCT itself. These get linked into the final wasm by `wasm-ld`. Cached per compile-config. |
+
+### H. Support tooling
+
+| name | role |
+| --- | --- |
+| **CMake** | Configures and drives OCCT's own C++ build (compiles OCCT's `.cxx` into object archives) before `emcc` links them into wasm. Run via `emcmake cmake` to inject `emcc` as the compiler. Pinned in `requirements.txt`. |
+| **Doxygen** | Parses OCCT's `/** … */` comments into XML; `extract-docs.py` folds that into the generated `.d.ts` JSDoc. Does not touch the wasm itself. Uses the system-installed `doxygen`. |
+| **Nx** | Workspace build orchestrator. Caches per-task outputs so re-running unchanged steps is a no-op. The host build pipeline goes through Nx targets. See [Caching Behavior](#caching-behavior). |
+| **Docker** | Alternative isolation: the same scripts run inside a Linux container with emsdk pre-installed. See [Consumer Workflows → Docker](#docker). |
+| **Node.js** | Runs the JS-side smoke tests and `npm pack` for distribution. Pinned via `.nvmrc`. Not in the parse or compile pipelines. |
+
+### Build outputs (what the pipeline produces)
+
+The output set per consumer YAML. Names come from the YAML's `mainBuild.name` (here illustrated as `my_build`).
+
+| artifact | role |
+| --- | --- |
+| **`my_build.wasm`** | The compiled WebAssembly module — OCCT geometry kernel, embind glue, all linked together. The thing browsers and Node load. |
+| **`my_build.js`** | JS wrapper emitted by `emcc` — module loader, exported function thunks, embind runtime. Imports the `.wasm` and exposes the JS API. |
+| **`my_build.d.ts`** | TypeScript declarations emitted by the bindgen's codegen. Type fidelity here depends on the discover pass having enumerated every reachable NCollection instantiation; gaps surface as `: number` or `: unknown` downgrades. |
+| **`my_build.js.symbols`** | Symbol table emitted by `wasm-ld`. Useful for diffing two builds to see which symbols were retained or dropped. |
+
+### How the components flow together
+
+A single end-to-end build, with each step labelled by which component does the work:
+
+1. **A** (`clone-deps.sh`) materialises **emsdk**, **OCCT**, **rapidjson**, **FreeType** under `deps/`.
+2. **A** (`uv`) creates `.venv/` and installs **F**'s Python dependencies (including the **B** `libclang` binding).
+3. **F** (`paths.py`, `buildFlatIncludes()`) builds **G** (the flat include directory).
+4. **F** (`paths.py`, `buildPch()`) calls **D** (`emcc`) to build **G** (the PCH).
+5. **F** (`ast/parse.py`) calls **B** (`libclang`) to parse **E** (OCCT headers via the flat include dir) using **C** (`libc++` headers).
+6. **F** (`discover.py`) walks the resulting AST and writes **G** (`ncollection-manifest.json`).
+7. **F** (`codegen/embind/`) generates embind C++ source.
+8. **D** (`emcc`) compiles the generated source + OCCT source into `.o` files, using the **G** PCH for speed.
+9. **D** (`wasm-ld`) links the `.o` set into a `.wasm`, with **F** (`link/rewrite.py`) applying the NCollection filter.
+10. **D** (`wasm-opt`) shrinks the linked wasm.
+11. The build outputs (`my_build.wasm`, `.js`, `.d.ts`, `.symbols`) land in the consumer's chosen output directory.
+
+The [Task Graph](#task-graph) below is the Nx-orchestrated version of steps 4–10 with the parallelism and caching annotations.
+
+## Task Graph
+
+```
+setup (uncached) → pch → generate → compile-bindings ─┐
+ │ ├─→ link → build
+ └─→ compile-sources ───────────────┘
+```
+
+`compile-bindings` and `compile-sources` run in parallel after `pch` completes.
+
+## configurations.json
+
+All named compile-time configurations live in `build-configs/configurations.json`. Each entry is a map of `OCJS_*` environment variable names to values.
+
+### Supported keys
+
+The **bare default** column is what `build-wasm.sh` would fall back to if you set neither an env var nor `--config`. The **`single-threaded` config** column is what `configurations.json`'s `single-threaded` entry sets — the production default that the published tarball is linked with and what `build-wasm.sh` selects when `OCJS_CONFIG` and `--config` are both unset (see the `OCJS_CONFIG="${OCJS_CONFIG:-single-threaded}"` fallback in `build-wasm.sh`). All four shipped configurations (`single-threaded`, `single-threaded-smallest`, `multi-threaded`, `debug`) ship with native WASM exceptions, `EVAL_CTORS=2`, and Closure on; they differ on opt level, threading, and wasm-opt budget.
+
+| Key | Description | Bare default | `single-threaded` config |
+| --------------------- | ------------------------------------------------------- | ----------------- | ------------------------ |
+| `OCJS_OPT` | Compile optimization level (`-O0`, `-O2`, `-O3`, `-Os`) | `-O2` | `-O3` |
+| `OCJS_LTO` | Enable LTO at compile time (`0` or `1`) | `0` | `0` |
+| `OCJS_EXCEPTIONS` | Enable native WASM exceptions (`0` or `1`) | `0` | `1` |
+| `OCJS_EH_MODE` | Exception handling mode (`wasm` or `js`) | `wasm` | `wasm` |
+| `OCJS_SIMD` | Enable baseline SIMD (`-msimd128`, `0` or `1`) | `0` | `1` |
+| `OCJS_RELAXED_SIMD` | Enable Relaxed SIMD opcodes (requires `OCJS_SIMD=1`; Safari 26.x does not yet implement Relaxed SIMD) | `0` | `0` |
+| `OCJS_BIGINT` | Enable `-sWASM_BIGINT` for native i64↔BigInt | `0` | `1` |
+| `THREADING` | Threading mode (`single-threaded` or `multi-threaded`) | `single-threaded` | `single-threaded` |
+| `OCJS_DEFINES` | Comma-separated C preprocessor defines | _(empty)_ | `OCCT_NO_DUMP` |
+| `OCJS_UNDEFINES` | Comma-separated C preprocessor undefines | _(empty)_ | `OCC_CONVERT_SIGNALS` |
+| `OCJS_WASM_OPT_LEVEL` | wasm-opt optimization level | `-O3` | `-O4` |
+| `OCJS_CLOSURE` | Run Closure Compiler (`true` or `false`) | `false` | `true` |
+| `OCJS_EVAL_CTORS` | Enable Emscripten eval ctors (`true` or `false`) | `false` | `true` |
+| `OCJS_EVAL_CTORS_LEVEL` | `-sEVAL_CTORS=N` level when `OCJS_EVAL_CTORS=true` | `2` | `2` |
+| `OCJS_CONVERGE` | Use `--converge` in wasm-opt (`true` or `false`) | `false` | `true` |
+| `OCJS_MALLOC` | Heap allocator (`dlmalloc` or `mimalloc`) | `dlmalloc` | `mimalloc` |
+| `OCJS_EXTRA_CFLAGS` | Extra compile flags appended to C/CXX | _(empty)_ | _(empty)_ |
+
+### Adding a new configuration
+
+Add an entry to `build-configs/configurations.json`:
+
+```json
+{
+ "my-experiment": {
+ "OCJS_OPT": "-O3",
+ "OCJS_LTO": "1",
+ "OCJS_EXCEPTIONS": "0",
+ "OCJS_SIMD": "1",
+ "OCJS_BIGINT": "1",
+ "THREADING": "single-threaded",
+ "OCJS_WASM_OPT_LEVEL": "-O4",
+ "OCJS_CLOSURE": "true",
+ "OCJS_EVAL_CTORS": "true",
+ "OCJS_CONVERGE": "true"
+ }
+}
+```
+
+Unspecified keys fall back to the bare defaults in `build-wasm.sh` (see the table above).
+
+## Consumer YAML Format
+
+The consumer YAML format is unchanged from v7.6.2:
+
+```yaml
+mainBuild:
+ name: my_build.js
+ bindings:
+ - symbol: TopoDS_Shape
+ - symbol: BRepBuilderAPI_MakeEdge
+ emccFlags:
+ - -O3
+ - -flto
+ - -fwasm-exceptions
+ - -sEXPORT_ES6=1
+ - -sMODULARIZE
+ - -sALLOW_MEMORY_GROWTH=1
+ - -sWASM_BIGINT
+ - --no-entry
+```
+
+All `emccFlags` are passed **verbatim** to `emcc` at link time. The consumer has full control over link-time behavior.
+
+## Fill-Not-Strip Rules
+
+When linking, the build system applies "fill-not-strip" logic for optimization and LTO flags:
+
+1. If consumer `emccFlags` already contains an `-O*` flag → used as-is
+2. If consumer `emccFlags` lacks `-O*` → the config's `OCJS_OPT` value is added (default: `-O2`)
+3. If consumer `emccFlags` already contains `-flto` → used as-is
+4. If consumer `emccFlags` lacks `-flto` and `OCJS_LTO=1` → `-flto` is added
+
+Consumer flags are never stripped or modified.
+
+## Flag Precedence
+
+For compile-time flags, precedence is (highest to lowest):
+
+1. Explicit env var in the shell (e.g., `OCJS_OPT=-Os`)
+2. Value from `configurations.json` entry (via `--config`)
+3. `build-wasm.sh` built-in defaults
+
+## Consistency Validation
+
+The build system warns (non-fatal) when compile-time and link-time flags are mismatched:
+
+- Compiled with `OCJS_EXCEPTIONS=1` but emccFlags has `-sDISABLE_EXCEPTION_CATCHING=1`
+- Compiled with `OCJS_SIMD=1` but emccFlags lacks `-msimd128`
+- Compiled without exceptions but emccFlags has `-fwasm-exceptions`
+
+## Caching Behavior
+
+Nx computes cache keys from `namedInputs` defined in `nx.json`:
+
+- **compileConfig**: `configurations.json` content, `OCJS_CONFIG`, and all compile-time `OCJS_*` env vars
+- **linkConfig**: Post-processing env vars (`OCJS_WASM_OPT_LEVEL`, `OCJS_CLOSURE`, `OCJS_CONVERGE`, etc.)
+- **toolchain**: `emcc --version` output
+- **depsVersion**: `DEPS.json` content
+- **generatorCode**: All `src/**/*.py` files and `bindgen-filters.yaml`
+
+### Cache sharing
+
+Same config + different consumer YAMLs → compile targets cache-hit, link target cache-miss.
+Different configs → fully separate compile caches.
+
+### Debugging cache misses
+
+```bash
+npx nx show project ocjs # Show resolved project config
+NX_VERBOSE_LOGGING=true npx nx run ocjs:pch # Verbose logging
+```
+
+## Maintainer Workflows
+
+### Full build with a named configuration
+
+```bash
+./build-wasm.sh --config single-threaded full path/to/consumer.yml
+```
+
+### Link only (reuses compile cache)
+
+```bash
+./build-wasm.sh --config single-threaded link path/to/consumer.yml
+```
+
+### Override a single flag from the config
+
+```bash
+OCJS_WASM_OPT_LEVEL=-O4 ./build-wasm.sh --config single-threaded full consumer.yml
+```
+
+### Using Nx directly
+
+```bash
+OCJS_CONFIG=single-threaded OCJS_YAML=path/to/consumer.yml npx nx run ocjs:build
+```
+
+### Running individual targets
+
+```bash
+OCJS_CONFIG=single-threaded npx nx run ocjs:pch
+OCJS_CONFIG=single-threaded npx nx run ocjs:generate
+OCJS_CONFIG=single-threaded npx nx run ocjs:compile-bindings
+OCJS_CONFIG=single-threaded npx nx run ocjs:compile-sources
+OCJS_CONFIG=single-threaded OCJS_YAML=consumer.yml npx nx run ocjs:link
+```
+
+## Consumer Workflows
+
+### Docker
+
+```bash
+docker run -e OCJS_CONFIG=single-threaded \
+ -v $(pwd)/my-config.yml:/src/config.yml \
+ -v $(pwd)/output:/output \
+ opencascade-js link config.yml
+```
+
+### Checkout-based
+
+```bash
+cd repos/opencascade.js
+./scripts/clone-deps.sh
+./build-wasm.sh --config single-threaded full path/to/consumer.yml
+```
+
+## Self-Contained Dependencies
+
+Run `scripts/clone-deps.sh` to clone all dependencies into `deps/` (pass
+`--dest ` to target a different location, e.g. `--dest ..` for the
+legacy sibling layout):
+
+- `deps/emsdk/` — Emscripten SDK (version from `DEPS.json`)
+- `deps/OCCT/` — OpenCASCADE Technology (pinned commit)
+- `deps/rapidjson/` — RapidJSON (pinned commit)
+- `deps/freetype/` — FreeType (pinned commit)
+
+The script is idempotent and validates pinned commits when `OCJS_STRICT_DEPS=1`.
+
+## Migration from v2
+
+v2 drove the source build through the Python entry point `src/buildFromYaml.py` (wrapped by the Docker image's `ENTRYPOINT`). v3 replaces that with a single shell wrapper, `build-wasm.sh`, sitting on top of Nx-managed bindgen / compile / link steps. Behaviours that consumers of a v2 custom build may need to adjust:
+
+| v2 | v3 |
+| ------------------------------------ | --------------------------------------------------------- |
+| `src/buildFromYaml.py ` | `./build-wasm.sh [--config ] ` |
+| `../assimpjs/emsdk` (relative path) | `deps/emsdk/` (cloned via `clone-deps.sh`) |
+| Flag stripping in `buildFromYaml.py` | Fill-not-strip (consumer flags pass through verbatim) |
+| `OCJS_BIGINT` env var appendage | Consumer specifies `-sWASM_BIGINT` directly in emccFlags |
+| `OCJS_EVAL_CTORS` env var appendage | Consumer specifies `-sEVAL_CTORS=N` directly in emccFlags |
+
+Cache and task-graph mechanics (Nx content-hashing, `npx nx reset` for cleanup, the `dependsOn` task graph) are v3-only and have no v2 equivalent — they replace the implicit single-shot Python pipeline.
+
+## Troubleshooting
+
+### Stale dependencies
+
+```bash
+rm -rf deps/ && ./scripts/clone-deps.sh
+```
+
+### Unexpected cache miss
+
+Set `NX_VERBOSE_LOGGING=true` to see which inputs changed.
+
+### Flag consistency warnings
+
+These are non-fatal. They indicate a mismatch between compile-time configuration and consumer link-time flags. Review both your `--config` choice and consumer YAML's `emccFlags`.
+
+### Full cache reset
+
+```bash
+npx nx reset
+```
diff --git a/CHANGELOG.md b/CHANGELOG.md
index bb1aed61..39aaa36c 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,37 +1,158 @@
# Changelog
-## v1.1.4 (unreleased)
+## v3.0.0-beta.2
+
+Final beta before release candidate. Adds the pre-built multi-threaded WASM to the published npm tarball.
+
+### Highlights
+
+- **Multi-threaded subpath exports** — `@taucad/opencascade.js/multi` (ESM loader + types) and `@taucad/opencascade.js/multi/wasm` (`opencascade_full_multi.wasm`). Consumers no longer need to rebuild from source to opt into pthread-enabled OCCT.
+- **Smoke coverage** — `tests/smoke/smoke-package-exports.test.ts` guards the static exports contract; `tests/smoke/smoke-multi-threaded.test.ts` live-boots the MT binary when `SharedArrayBuffer` is available.
+- **Documentation sweep** — README, BREAKING_CHANGES, BENCHMARKS, MAINTAINER, and ocjs.org docs updated for the `/multi` import surface, COOP/COEP prerequisites, and OCCT parallel activation.
+
+## v3.0.0
+
+v3 is a ground-up modernisation: OCCT V8 (GA), native WebAssembly exceptions, ES modules, full TypeScript bindings with idiomatic JSDoc, content-addressed build caching, and reproducible builds via pinned dependency commits.
+
+**Full v2 → v3 migration guide:** [BREAKING_CHANGES.md](BREAKING_CHANGES.md) — every consumer-visible change with Before / After code samples and migration steps.
+
+### Highlights
+
+- **OCCT V8.0.0** (GA, up from V7.6.2) and **Emscripten 5.0.1** (up from 3.1.14).
+- **libclang 18.1.1** for the bindgen parser (up from `15.0.6.1`), paired with vendored **LLVM 17.0.6** libc++ + clang resource headers to satisfy the LLVM project's libc++/clang N-1 compat-window policy. This is what makes the v3 bindings _accurate_ for OCCT V8 — libclang 18 exposes `templateTypedefs`, sees through `DEFINE_STANDARD_HANDLE` expansions, and resolves `NCollection_*` template instantiations that v2's libclang 15 either skipped, mislabelled as `UNEXPOSED`, or surfaced as duplicate registrations. The parse environment is hermetic: `src/ocjs_bindgen/config/paths.py` routes libclang at the vendored libc++ headers and clang resource directory, not at the host system's clang.
+- **Native WebAssembly exceptions** (`-fwasm-exceptions`) replace JS `invoke_*` trampolines: ~12% gzipped size overhead vs. the prior ~80%, with zero happy-path performance cost. `WebAssembly.Exception` is decodable end-to-end via `getExceptionMessage`, `incrementExceptionRefcount`, `decrementExceptionRefcount`, and `OCJS.getStandard_FailureData` — see [§C](BREAKING_CHANGES.md#section-c--webassembly-exception-handling).
+- **Performance vs. V7.6.2**: 22-31% faster boolean operations, 16-19% faster fillets, 23-29% faster complex models. Full numbers in [Appendix G](BREAKING_CHANGES.md#appendix-g--performance--size).
+- **ES module distribution** — `"type": "module"`, single default-export `init` function, single `opencascade_full.{js,wasm,d.ts}` triple replacing v2's facade module. The wasm binary is exposed via the `@taucad/opencascade.js/wasm` subpath export so bundlers (Vite, Webpack, Rspack), Node `import.meta.resolve`, Bun, and Deno all resolve it identically — see [§A](BREAKING_CHANGES.md#section-a--module-loading).
+- **Suffix-free overload symbols** — a single `gp_Pnt`, `BRepPrimAPI_MakeBox`, `BRepBuilderAPI_MakeEdge`, etc., with a value-based dispatcher that picks the right C++ overload from your argument types. The `_N`-suffixed overload subclasses are gone except for genuinely ambiguous same-arity cases. Same-arity dispatch is now unified across `class_function` + instance overload sets, fixing v2's silently-clobbered registrations. See [§B1](BREAKING_CHANGES.md#b1--suffix-free-overloads) and [§D7](BREAKING_CHANGES.md#d7--same-arity-overload-dispatch-unified-legacy-intsize_t-pairs-deduplicated). Dispatcher cost measured at ~264 ns/call (~5 µs per typical CAD render, 0.003–0.011% of wall time) — see [BENCHMARKS.md §3](BENCHMARKS.md#3--embind-overload-dispatch).
+- **Output-parameter return shape redesigned** — methods with class output parameters (`gp_Pnt&`, `Bnd_Box&`, `GProp_GProps&`, …) mutate the caller's instance in place and read directly from it (no envelope mirroring). Methods with primitive / enum / elided-Handle outputs return a structured envelope; v2's `{ current: 0 }` placeholders are gone. See [§B2](BREAKING_CHANGES.md#b2--output-parameter-return-shape-class-outputs-mutate-in-place-envelopes-only-when-js-truly-needs-them).
+- **Non-const `Handle&` output positions elided** from the JS signature — callers no longer allocate `new oc.Handle_()` placeholders for output-only Handle slots. Drop the position from the call entirely and read the freshly-assigned Handle from the envelope. ~2.29× wall-clock speedup on affected call sites. See [§B3](BREAKING_CHANGES.md#b3--non-const-handlet-output-positions-elided-from-the-js-signature).
+- **`TopoDS` namespace bridge** — `oc.TopoDS.Edge(shape)`, `oc.TopoDS.Face(shape)`, etc., replacing v2's mix of `prototype.Edge`, `_TopoDS_Edge`, manual `getPointer` patterns. See [§D1](BREAKING_CHANGES.md#d1--topods-namespace-bridge).
+- **Baseline WebAssembly SIMD** (`-msimd128`) on by default. Relaxed-SIMD ops (`-mrelaxed-simd`) are gated behind `OCJS_RELAXED_SIMD=1` because Safari 26.x cannot parse them.
+- **`-sWASM_BIGINT`** on by default — eliminates the Emscripten i64 legalisation pass.
+- **Full TypeScript bindings** with Doxygen-derived JSDoc rendered correctly in Monaco IntelliSense, fixed-width primitive types (`int8_t`, `uint32_t`, `int64_t`) mapped to TS scalars, sized-tuple emission for C array parameters, and string enums.
+- **`Symbol.dispose` lifecycle** on every disposable binding — explicit resource management is wired in for both class wrappers and envelope returns that own Handle resources. The disposer is idempotent and alias-safe.
+- **Reproducible builds** via `DEPS.json` (every external dependency — OCCT, rapidjson, freetype, Emscripten, LLVM 17 — pinned to an exact commit hash) plus a `provenance.json` sidecar shipped alongside every release artefact.
+- **Cached, incremental builds** through Nx with content-addressed inputs — 10-30 minute clean builds become seconds on a hit.
+
+### Breaking changes
+
+Each entry deep-links into [BREAKING_CHANGES.md](BREAKING_CHANGES.md) for Before / After code samples and migration steps.
+
+- **[A — Module loading](BREAKING_CHANGES.md#section-a--module-loading)** — `dist/` ships a single triple (no facade); ESM-only with explicit `locateFile`; wasm binary reached via the `@taucad/opencascade.js/wasm` subpath export (no `dist/*` deep-imports).
+- **[B — JS / TS API surface](BREAKING_CHANGES.md#section-b--js--ts-api-surface-changes)** — `_N`-suffixed overload subclasses collapsed to single symbols; output-parameter return shape redesigned (class outputs mutate in place, primitives / enums / elided Handles ride a structured envelope); non-const `Handle&` output positions elided from the JS signature; envelope native-return field is `envelope.returnValue` (reserved to avoid collision with OCCT parameters named `result`).
+- **[C — WebAssembly exception handling](BREAKING_CHANGES.md#section-c--webassembly-exception-handling)** — caught exceptions are `WebAssembly.Exception` instances; decode via the `getExceptionMessage` runtime helper.
+- **[D — OCCT V8 API](BREAKING_CHANGES.md#section-d--occt-v8-api-breaking-changes)** — `TopoDS` namespace bridge replaces direct namespace binding; `Bnd_Box::Get` removed (use `CornerMin` / `CornerMax`); `Poly_Triangulation` normals API now value-returning; `BRepMesh_IncrementalMesh` constructor signature; `TopoDS_Shape::HashCode` removed with no shipped replacement; same-arity overload dispatch unified across static + instance variants; JS-indistinguishable `int`/`size_t` NCollection pairs collapsed at codegen time (V8's `size_t` migration).
+- **[E — Removed symbol families](BREAKING_CHANGES.md#section-e--removed-symbol-families)** — `OpenGl_*` / `Aspect_Window` / rest of `TKOpenGl` (headless target); `TopOpe*` (use `BOPAlgo_*` / `BRepAlgoAPI_*`); legacy `Standard_Transient`-based collections (use auto-discovered `NCollection_*`); `GCE2d_*` aliases (use `GC_*2d`).
+- **[F — Build flag changes](BREAKING_CHANGES.md#section-f--build-flag-changes)** — source-build CLI replaced (`src/buildFromYaml.py` → `build-wasm.sh` with explicit subcommands and an optional `--config ` selecting an optimisation profile from `configurations.json`); reference `full.yml` (~4,400 symbols) bundled inside the Docker image as the starting point for custom builds; native WebAssembly exceptions on by default; Emscripten flag renames and additions from the 3.x → 5.x toolchain upgrade.
+
+### Build system
+
+- **Native WASM exceptions as the baseline link mode** — replaces `-fexceptions` JS `invoke_*` trampolines with `-fwasm-exceptions`, cutting exception-build size overhead from ~80% to ~12% gzipped.
+- **`build-wasm.sh` unified entry point** (Docker `ENTRYPOINT` + host CLI parity) — explicit subcommands (`full`, `link`, `validate`, `generate`, `bindings`, `sources`, `pch`), `--help`, optional `--config ` from `configurations.json`, and build-summary output.
+- **Named build configurations** in `configurations.json` — `single-threaded` (production default), `single-threaded-smallest` (size-tuned `-Os`), `multi-threaded` (SAB threading), `debug`. All ship with native WASM exceptions, `EVAL_CTORS=2`, and Closure on.
+- **Reference `full.yml` bundled inside the Docker image** at `/opencascade.js/build-configs/full.yml` — the ~4,400-symbol list the published tarball builds from. Extract it as a starting point for trimming via the [trim-symbols guide](docs/guides/trim-symbols.md).
+- **`DEPS.json` dependency pinning** — every external dependency (OCCT, rapidjson, freetype, Emscripten, LLVM 17) is pinned to an exact commit hash with version metadata. `clone-deps.sh` automates setup.
+- **Hermetic libclang parse environment** — `src/ocjs_bindgen/config/paths.py` is now the single source of truth for include resolution during the bindgen discover pass. It points libclang at the vendored LLVM 17 libc++ headers + clang resource directory (matching libclang 18's expectations under the N-1 policy) and at the OCCT flat-include symlink farm, so the parse is reproducible across hosts and immune to whatever system clang the developer happens to have. Foundation for cross-arch (`darwin-arm64`, `linux-x86_64`, `linux-aarch64`) bit-identical builds via `uv`-managed Python 3.14.4.
+- **Build provenance** — every build emits a `provenance.json` sidecar capturing toolchain versions, source commits, compile / link flags, cache key, and output sizes. Shipped alongside the WASM in the published tarball.
+- **Nx-based caching** — the full pipeline (`apply-patches` → `pch` → `generate-bindings` → `compile-bindings` → `compile-sources` → `link` → `validate` → `provenance`) is wired through Nx with content-addressed inputs (including git-ignored files), so partial rebuilds are surgical. Clean full build ≈ 30 minutes; cache hits skip compilation entirely. Stale `.o` files compiled with one set of flags are invalidated when the flags change.
+- **Validation harness** (`build-wasm.sh validate `) — post-build checks that every requested symbol has a compiled `.o`, the `.wasm` exists at a reasonable size, and Emscripten EH helpers are present in the linked JS glue when requested.
+- **Configurable optimisation** — `wasm-opt` runs at `-O4` for production configs and `-O3` for size-tuned; `--traps-never-happen` is enabled; `OCJS_EXTRA_CFLAGS` passes arbitrary flags through to `emcc`.
+- **Updated Dockerfile** to `emscripten/emsdk:5.0.1` with pinned digest, dependencies cloned at exact commits from `DEPS.json`, entrypoint via `build-wasm.sh` with env-var passthrough; a Docker E2E validation script is included.
+
+### Tests
+
+- **Comprehensive smoke suite** under [`tests/smoke/`](tests/smoke/) — primitives, smart pointers, topology, transforms, wire/face building, fillets/chamfers, sweep/loft, OBJ I/O, XCAF, intersections, output params, enum dispatch, BRep tool overloads, embind machinery, missing-OCCT-modules detection, suffix-free overload resolution, Handle-output elision, exception decode, `Symbol.dispose` disposal, and modern `NCollection` bindings.
+- **Type-only tests** (`tests/types.test-d.ts`, `enum-dispatch.test-d.ts`, `enums.test-d.ts`, `namespaces.test-d.ts`, `output-params.test-d.ts`, `disposable-containers.test-d.ts`) — lock the published `.d.ts` shape against regression.
+- **Bindgen output-shape regression** (`tests/bindgen-output-shape.test.ts`) — asserts the codegen never emits envelope fields that mirror concrete class outputs and that class outputs always forward via `*val::as(allow_raw_pointers())`.
+- **Semantic-diagnostic and `dts-validation` harnesses** — type-check the codegen output end-to-end and track the `any` count in the generated `.d.ts` to prevent silent type-resolution regressions.
+
+### Documentation
+
+- New [BREAKING_CHANGES.md](BREAKING_CHANGES.md) — single comprehensive v2 → v3 consumer migration guide with Before / After code samples for every breaking change.
+- Rewritten [README.md](README.md) with quick start, Docker workflow, environment-variable reference, and customisation pointers.
+- [BUILD_SYSTEM.md](BUILD_SYSTEM.md) — full `OCJS_*` env-var matrix, configuration authoring guide, and the v2 → v3 build-system migration table.
+- [docs/optimization-guide.md](docs/optimization-guide.md) — size vs. speed, LTO, defines, `wasm-opt`.
+- [docs/build-config-reference.md](docs/build-config-reference.md) — YAML schema and customisation reference.
+
+### Source pinning (this release)
+
+Full commit hashes live in [DEPS.json](DEPS.json).
+
+- OCCT `V8_0_0` (GA, commit `d3056ef8`)
+- rapidjson post-1.1.0 (commit `24b5e7a8`)
+- freetype `VER-2-13-0` (commit `de8b92dd`)
+- Emscripten `5.0.1` (digest `sha256:c89732ef…`)
+- libclang `18.1.1` (Python binding, pinned in `requirements.txt`; up from v2's `15.0.6.1`)
+- LLVM `17.0.6` (vendored prebuilt — parse-side libc++ + clang resource headers; N-1 compat with libclang 18.1.1)
+
+## Earlier releases (v0.1.x – v1.1.x)
+
+Pre-v3 release notes, preserved verbatim. The two giant class lists from `v1.1.0` are wrapped in `` for readability — expand to view.
+
+### v1.1.4 (unreleased)
+
version only used for testing on npm
-## v1.1.3 (unreleased)
+### v1.1.3 (unreleased)
+
version only used for testing on npm
-## v1.1.2 (unreleased)
-* CI-Testing system implemented, which uses some of the code in the `opencascade-examples` repository (but can also define stand-alone tests).
+### v1.1.2 (unreleased)
+
+- CI-Testing system implemented, which uses some of the code in the `opencascade-examples` repository (but can also define stand-alone tests).
+
+### v1.1.1
+
+- Removed support for `TColQuantity_Array1OfLength` and `TopoDS_ListOfShape`, as they cause errors during initialization of the library.
+
+### v1.1.0
+
+- More accurate way of counting supported and unsupported classes.
+- Removed support for classes `Aspect_Background`, `Aspect_CircularGrid`, `Aspect_GenId`, `Aspect_GradientBackground`, `Aspect_Grid`, `Aspect_RectangularGrid`, `Aspect_Touch`, `Aspect_VKeySet`, `Aspect_Window`, `math_Householder`, `math_IntegerVector`, `math_Matrix`, `math_Vector` due to an error (breaking change).
+- Added support for many `IntPatch_*`, `Interface_*`, `OSD_*`, `OpenGl_*`, and `WNT_ClassDefinitionError` classes.
+
+
+ Full added-classes list
+
+ `IntPatch_ALine`, `IntPatch_ALineToWLine`, `IntPatch_ArcFunction`, `IntPatch_CSFunction`, `IntPatch_CurvIntSurf`, `IntPatch_GLine`, `IntPatch_HCurve2dTool`, `IntPatch_HInterTool`, `IntPatch_ImpImpIntersection`, `IntPatch_ImpPrmIntersection`, `IntPatch_InterferencePolyhedron`, `IntPatch_LineConstructor`, `IntPatch_PolyArc`, `IntPatch_PolyLine`, `IntPatch_Polygo`, `IntPatch_PolyhedronTool`, `IntPatch_PrmPrmIntersection`, `IntPatch_PrmPrmIntersection_T3Bits`, `IntPatch_SpecialPoints`, `IntPatch_TheIWLineOfTheIWalking`, `IntPatch_TheIWalking`, `IntPatch_ThePathPointOfTheSOnBounds`, `IntPatch_TheSOnBounds`, `IntPatch_TheSearchInside`, `IntPatch_TheSegmentOfTheSOnBounds`, `IntPatch_TheSurfFunction`, `IntPatch_WLineTool`, `Interface_Category`, `Interface_CheckFailure`, `Interface_CheckTool`, `Interface_CopyMap`, `Interface_EntityCluster`, `Interface_FileParameter`, `Interface_GTool`, `Interface_GlobalNodeOfGeneralLib`, `Interface_GlobalNodeOfReaderLib`, `Interface_IntVal`, `Interface_InterfaceMismatch`, `Interface_NodeOfGeneralLib`, `Interface_NodeOfReaderLib`, `Interface_ParamList`, `Interface_ParamSet`, `Interface_ReportEntity`, `Interface_STAT`, `Interface_ShareFlags`, `Interface_ShareTool`, `Interface_SignLabel`, `Interface_Static`, `Interface_TypedValue`, `Interface_UndefinedContent`, `OSD`, `OSD_Directory`, `OSD_DirectoryIterator`, `OSD_Disk`, `OSD_Environment`, `OSD_Exception`, `OSD_Exception_ACCESS_VIOLATION`, `OSD_Exception_ARRAY_BOUNDS_EXCEEDED`, `OSD_Exception_CTRL_BREAK`, `OSD_Exception_FLT_DENORMAL_OPERAND`, `OSD_Exception_FLT_DIVIDE_BY_ZERO`, `OSD_Exception_FLT_INEXACT_RESULT`, `OSD_Exception_FLT_INVALID_OPERATION`, `OSD_Exception_FLT_OVERFLOW`, `OSD_Exception_FLT_STACK_CHECK`, `OSD_Exception_FLT_UNDERFLOW`, `OSD_Exception_ILLEGAL_INSTRUCTION`, `OSD_Exception_INT_DIVIDE_BY_ZERO`, `OSD_Exception_INT_OVERFLOW`, `OSD_Exception_INVALID_DISPOSITION`, `OSD_Exception_IN_PAGE_ERROR`, `OSD_Exception_NONCONTINUABLE_EXCEPTION`, `OSD_Exception_PRIV_INSTRUCTION`, `OSD_Exception_STACK_OVERFLOW`, `OSD_Exception_STATUS_NO_MEMORY`, `OSD_FileIterator`, `OSD_Host`, `OSD_MAllocHook`, `OSD_MemInfo`, `OSD_OSDError`, `OSD_PerfMeter`, `OSD_Process`, `OSD_Protection`, `OSD_SIGBUS`, `OSD_SIGHUP`, `OSD_SIGILL`, `OSD_SIGINT`, `OSD_SIGKILL`, `OSD_SIGQUIT`, `OSD_SIGSEGV`, `OSD_SIGSYS`, `OSD_SharedLibrary`, `OSD_Signal`, `OpenGl_Aspects`, `OpenGl_AspectsProgram`, `OpenGl_AspectsSprite`, `OpenGl_AspectsTextureSet`, `OpenGl_BackgroundArray`, `OpenGl_CappingAlgo`, `OpenGl_CappingPlaneResource`, `OpenGl_Caps`, `OpenGl_Clipping`, `OpenGl_ClippingIterator`, `OpenGl_ClippingState`, `OpenGl_Context`, `OpenGl_Element`, `OpenGl_Flipper`, `OpenGl_Font`, `OpenGl_FrameBuffer`, `OpenGl_FrameStats`, `OpenGl_FrameStatsPrs`, `OpenGl_GraduatedTrihedron`, `OpenGl_GraphicDriver`, `OpenGl_Group`, `OpenGl_IndexBuffer`, `OpenGl_LayerList`, `OpenGl_LightSourceState`, `OpenGl_LineAttributes`, `OpenGl_MaterialState`, `OpenGl_ModelWorldState`, `OpenGl_NamedResource`, `OpenGl_OitState`, `OpenGl_PointSprite`, `OpenGl_PrimitiveArray`, `OpenGl_ProjectionState`, `OpenGl_RaytraceGeometry`, `OpenGl_Resource`, `OpenGl_Sampler`, `OpenGl_SetOfPrograms`, `OpenGl_SetOfShaderPrograms`, `OpenGl_ShaderManager`, `OpenGl_ShaderObject`, `OpenGl_ShaderProgram`, `OpenGl_ShaderUniformLocation`, `OpenGl_StateCounter`, `OpenGl_StateInterface`, `OpenGl_StencilTest`, `OpenGl_Structure`, `OpenGl_StructureShadow`, `OpenGl_Text`, `OpenGl_TextBuilder`, `OpenGl_Texture`, `OpenGl_TextureBufferArb`, `OpenGl_TextureFormat`, `OpenGl_TextureSet`, `OpenGl_TriangleSet`, `OpenGl_VariableSetterSelector`, `OpenGl_VertexBuffer`, `OpenGl_VertexBufferCompat`, `OpenGl_Window`, `OpenGl_Workspace`, `OpenGl_WorldViewState`, `WNT_ClassDefinitionError`.
+
+
+
+- Added support for many `NCollection_Array1` template specializations.
+
+
+ Full `NCollection_Array1` specialization list
+
+ `TColStd_Array1OfByte`, `Graphic3d_Array1OfAttribute`, `TColgp_Array1OfPnt`, `TColgp_Array1OfPnt2d`, `Poly_Array1OfTriangle`, `TColStd_Array1OfInteger`, `TShort_Array1OfShortReal`, `Quantity_Array1OfColor`, `TColgp_Array1OfDir`, `TColStd_Array1OfTransient`, `TColStd_Array1OfAsciiString`, `Interface_Array1OfHAsciiString`, `TColStd_Array1OfReal`, `TColGeom_Array1OfSurface`, `AppParCurves_Array1OfMultiPoint`, `TColgp_Array1OfVec`, `TColgp_Array1OfVec2d`, `AppDef_Array1OfMultiPointConstraint`, `AppParCurves_Array1OfConstraintCouple`, `AppParCurves_Array1OfMultiBSpCurve`, `AppParCurves_Array1OfMultiCurve`, `Approx_Array1OfAdHSurface`, `Approx_Array1OfGTrsf2d`, `BOPDS_VectorOfPave`, `BRepAdaptor_Array1OfCurve`, `TColStd_Array1OfBoolean`, `Extrema_Array1OfPOnCurv`, `Extrema_Array1OfPOnSurf`, `Bnd_Array1OfSphere`, `GeomFill_Array1OfLocationLaw`, `TopTools_Array1OfShape`, `GeomPlate_Array1OfSequenceOfReal`, `Plate_Array1OfPinpointConstraint`, `TColgp_Array1OfXYZ`, `GeomPlate_Array1OfHCurve`, `TColGeom2d_Array1OfCurve`, `GeomFill_Array1OfSectionLaw`, `ChFiDS_SecArray1`, `Bnd_Array1OfBox`, `Message_ArrayOfMsg`, `Bnd_Array1OfBox2d`, `TColStd_Array1OfListOfInteger`, `ChFiDS_StripeArray1`, `Expr_Array1OfNamedUnknown`, `Expr_Array1OfGeneralExpression`, `Expr_Array1OfSingleRelation`, `Extrema_Array1OfPOnCurv2d`, `TColgp_Array1OfXY`, `TColgp_Array1OfCirc2d`, `GccEnt_Array1OfPosition`, `TColgp_Array1OfLin2d`, `TColGeom2d_Array1OfBSplineCurve`, `TColGeom2d_Array1OfBezierCurve`, `TColGeom_Array1OfBSplineCurve`, `TColGeom_Array1OfBezierCurve`, `GeomLib_Array1OfMat`, `Graphic3d_ArrayOfIndexedMapOfStructure`, `HLRAlgo_Array1OfPHDat`, `HLRAlgo_Array1OfPINod`, `HLRAlgo_Array1OfPISeg`, `HLRAlgo_Array1OfTData`, `HLRBRep_Array1OfEData`, `HLRBRep_Array1OfFData`, `Intf_Array1OfLin`, `IGESAppli_Array1OfNode`, `IGESAppli_Array1OfFiniteElement`, `IGESData_Array1OfIGESEntity`, `IGESDraw_Array1OfConnectPoint`, `IGESGraph_Array1OfTextDisplayTemplate`, `IGESAppli_Array1OfFlow`, `IGESDefs_Array1OfTabularData`, `IGESGraph_Array1OfTextFontDef`, `IGESDimen_Array1OfGeneralNote`, `IGESBasic_Array1OfLineFontEntity`, `IGESData_Array1OfDirPart`, `IGESDimen_Array1OfLeaderArrow`, `IGESDraw_Array1OfViewKindEntity`, `IGESGraph_Array1OfColor`, `IGESGeom_Array1OfBoundary`, `IGESGeom_Array1OfCurveOnSurface`, `IGESGeom_Array1OfTransformationMatrix`, `IGESSolid_Array1OfLoop`, `IGESSolid_Array1OfFace`, `IGESSolid_Array1OfShell`, `IGESSolid_Array1OfVertexList`, `IntTools_Array1OfRange`, `IntTools_Array1OfRoots`, `Interface_Array1OfFileParameter`, `MeshVS_Array1OfSequenceOfInteger`, `StepDimTol_Array1OfDatumReferenceModifier`, `StepRepr_Array1OfRepresentationItem`, `StepVisual_Array1OfTessellatedItem`, `StepDimTol_Array1OfDatumSystemOrReference`, `StepVisual_Array1OfPresentationStyleSelect`, `StepVisual_Array1OfPresentationStyleAssignment`, `TColgp_Array1OfDir2d`, `TColGeom_Array1OfCurve`, `TColStd_Array1OfExtendedString`, `TDataStd_LabelArray1`, `TDataXtd_Array1OfTrsf`, `StepAP203_Array1OfApprovedItem`, `StepAP203_Array1OfCertifiedItem`, `StepAP203_Array1OfChangeRequestItem`, `StepAP203_Array1OfClassifiedItem`, `StepAP203_Array1OfContractedItem`, `StepAP203_Array1OfDateTimeItem`, `StepAP203_Array1OfPersonOrganizationItem`, `StepAP203_Array1OfSpecifiedItem`, `StepAP203_Array1OfStartRequestItem`, `StepAP203_Array1OfWorkItem`, `StepRepr_Array1OfMaterialPropertyRepresentation`, `StepFEA_Array1OfNodeRepresentation`, `StepAP214_Array1OfApprovalItem`, `StepAP214_Array1OfDateAndTimeItem`, `StepAP214_Array1OfDateItem`, `StepAP214_Array1OfDocumentReferenceItem`, `StepAP214_Array1OfExternalIdentificationItem`, `StepAP214_Array1OfGroupItem`, `StepAP214_Array1OfOrganizationItem`, `StepAP214_Array1OfPersonAndOrganizationItem`, `StepAP214_Array1OfPresentedItemSelect`, `StepAP214_Array1OfSecurityClassificationItem`, `StepAP214_Array1OfAutoDesignDateAndPersonItem`, `StepAP214_Array1OfAutoDesignDateAndTimeItem`, `StepAP214_Array1OfAutoDesignDatedItem`, `StepAP214_Array1OfAutoDesignGeneralOrgItem`, `StepAP214_Array1OfAutoDesignGroupedItem`, `StepAP214_Array1OfAutoDesignPresentedItemSelect`, `StepAP214_Array1OfAutoDesignReferencingItem`, `StepBasic_Array1OfApproval`, `StepBasic_Array1OfDerivedUnitElement`, `StepBasic_Array1OfDocument`, `StepBasic_Array1OfNamedUnit`, `StepBasic_Array1OfOrganization`, `StepBasic_Array1OfPerson`, `StepBasic_Array1OfProductContext`, `StepBasic_Array1OfProduct`, `StepBasic_Array1OfProductDefinition`, `StepBasic_Array1OfUncertaintyMeasureWithUnit`, `StepData_Array1OfField`, `StepDimTol_Array1OfDatumReference`, `StepDimTol_Array1OfDatumReferenceCompartment`, `StepDimTol_Array1OfDatumReferenceElement`, `StepDimTol_Array1OfGeometricToleranceModifier`, `StepDimTol_Array1OfToleranceZoneTarget`, `StepRepr_Array1OfShapeAspect`, `StepElement_Array1OfCurveElementEndReleasePacket`, `StepElement_Array1OfCurveElementSectionDefinition`, `StepElement_Array1OfHSequenceOfCurveElementPurposeMember`, `StepElement_Array1OfHSequenceOfSurfaceElementPurposeMember`, `StepElement_Array1OfMeasureOrUnspecifiedValue`, `StepElement_Array1OfSurfaceSection`, `StepElement_Array1OfVolumeElementPurpose`, `StepElement_Array1OfVolumeElementPurposeMember`, `StepFEA_Array1OfCurveElementEndOffset`, `StepFEA_Array1OfCurveElementEndRelease`, `StepFEA_Array1OfCurveElementInterval`, `StepFEA_Array1OfDegreeOfFreedom`, `StepFEA_Array1OfElementRepresentation`, `StepGeom_Array1OfCompositeCurveSegment`, `StepGeom_Array1OfBoundaryCurve`, `StepGeom_Array1OfCartesianPoint`, `StepGeom_Array1OfCurve`, `StepGeom_Array1OfPcurveOrSurface`, `StepGeom_Array1OfSurfaceBoundary`, `StepGeom_Array1OfTrimmingSelect`, `StepRepr_Array1OfPropertyDefinitionRepresentation`, `StepShape_Array1OfFaceBound`, `StepShape_Array1OfEdge`, `StepShape_Array1OfConnectedEdgeSet`, `StepShape_Array1OfFace`, `StepShape_Array1OfConnectedFaceSet`, `StepShape_Array1OfGeometricSetSelect`, `StepShape_Array1OfOrientedClosedShell`, `StepShape_Array1OfOrientedEdge`, `StepShape_Array1OfShapeDimensionRepresentationItem`, `StepShape_Array1OfShell`, `StepShape_Array1OfValueQualifier`, `StepVisual_Array1OfAnnotationPlaneElement`, `StepVisual_Array1OfBoxCharacteristicSelect`, `StepVisual_Array1OfCameraModelD3MultiClippingInterectionSelect`, `StepVisual_Array1OfCameraModelD3MultiClippingUnionSelect`, `StepVisual_Array1OfCurveStyleFontPattern`, `StepVisual_Array1OfDirectionCountSelect`, `StepVisual_Array1OfDraughtingCalloutElement`, `StepVisual_Array1OfFillStyleSelect`, `StepVisual_Array1OfInvisibleItem`, `StepVisual_Array1OfLayeredItem`, `StepVisual_Array1OfStyleContextSelect`, `StepVisual_Array1OfSurfaceStyleElementSelect`, `StepVisual_Array1OfTextOrCharacter`, `Storage_ArrayOfCallBack`, `Storage_ArrayOfSchema`, `Storage_PArray`, `TColQuantity_Array1OfLength`, `TColStd_Array1OfCharacter`, `TDF_AttributeArray1`, `TFunction_Array1OfDataMapOfGUIDDriver`, `TopOpeBRep_Array1OfVPointInter`, `TopOpeBRep_Array1OfLineInter`, `TopTools_Array1OfListOfShape`, `TopOpeBRepDS_Array1OfDataMapOfIntegerListOfInterference`, `math_Array1OfValueAndWeight`.
+
+
+
+- Added support for many `NCollection_List` template specializations.
+
+
+ Full `NCollection_List` specialization list
+
+ `TColStd_ListOfInteger`, `PrsMgr_ListOfPresentations`, `PrsMgr_ListOfPresentableObjects`, `SelectMgr_TriangFrustums`, `TopoDS_ListOfShape`, `AIS_ListOfInteractive`, `AIS_NListOfEntityOwner`, `SelectMgr_ListOfFilter`, `TopTools_ListOfShape`, `TColStd_ListOfTransient`, `V3d_ListOfLight`, `V3d_ListOfView`, `Message_ListOfAlert`, `BOPAlgo_ListOfCheckResult`, `BOPDS_ListOfPave`, `BOPDS_ListOfPaveBlock`, `IntSurf_ListOfPntOn2S`, `BOPTools_ListOfConnexityBlock`, `TopTools_ListOfListOfShape`, `BRep_ListOfPointRepresentation`, `BOPAlgo_ListOfEdgeInfo`, `DBRep_ListOfEdge`, `DBRep_ListOfFace`, `HLRBRep_ListOfBPoint`, `DBRep_ListOfHideData`, `BOPTools_ListOfCoupleOfShape`, `BRep_ListOfCurveRepresentation`, `BRepCheck_ListOfStatus`, `BRepFill_ListOfOffsetWire`, `ChFiDS_ListOfStripe`, `ChFiDS_Regularities`, `BRepOffset_ListOfInterval`, `TDF_LabelList`, `CDM_ListOfReferences`, `CDM_ListOfDocument`, `TColStd_ListOfReal`, `TopOpeBRepDS_ListOfInterference`, `ChFiDS_ListOfHElSpine`, `Law_Laws`, `DDF_TransactionStack`, `ExprIntrp_StackOfGeneralExpression`, `ExprIntrp_StackOfGeneralRelation`, `ExprIntrp_StackOfGeneralFunction`, `TColStd_ListOfAsciiString`, `FEmTool_ListOfVectors`, `Font_NListOfSystemFont`, `HLRAlgo_InterferenceList`, `HLRAlgo_ListOfBPoint`, `HLRBRep_ListOfBPnt2D`, `HLRTopoBRep_ListOfVData`, `IntAna_ListOfCurve`, `IntPolyh_ListOfCouples`, `IntTools_ListOfCurveRangeSample`, `IntTools_ListOfSurfaceRangeSample`, `IntTools_ListOfBox`, `MeshVS_PolyhedronVerts`, `Message_ListOfMsg`, `NLPlate_StackOfPlate`, `Poly_ListOfTriangulation`, `Prs3d_NListOfSequenceOfPnt`, `QANCollection_ListOfPnt`, `TDataStd_ListOfExtendedString`, `TDataStd_ListOfByte`, `TDF_AttributeList`, `TNaming_ListOfNamedShape`, `TDF_AttributeDeltaList`, `TDF_IDList`, `TDF_DeltaList`, `TNaming_ListOfIndexedDataMapOfShapeListOfShape`, `TNaming_ListOfMapOfShape`, `TopBas_ListOfTestInterference`, `TopOpeBRep_ListOfBipoint`, `TopOpeBRepBuild_ListOfLoop`, `TopOpeBRepBuild_ListOfListOfLoop`, `TopOpeBRepBuild_ListOfShapeListOfShape`, `TopOpeBRepBuild_ListOfPave`, `TopOpeBRepTool_ListOfC2DF`, `VrmlData_ListOfNode`.
+
+
+
+### v1.0.2
+
+- Added constructors for `TColgp_Array1OfPnt` as manual bindings.
-## v1.1.1
-* Removed support for `TColQuantity_Array1OfLength` and `TopoDS_ListOfShape`, as they cause errors during initialization of the library.
+### v1.0.1
-## v1.1.0
-* More accurate way of counting supported and unsupported classes
-* Removed support for classes `Aspect_Background`, `Aspect_CircularGrid`, `Aspect_GenId`, `Aspect_GradientBackground`, `Aspect_Grid`, `Aspect_RectangularGrid`, `Aspect_Touch`, `Aspect_VKeySet`, `Aspect_Window`, `math_Householder`, `math_IntegerVector`, `math_Matrix`, `math_Vector` due to an error (breaking change)
-* Added support for classes `IntPatch_ALine`, `IntPatch_ALineToWLine`, `IntPatch_ArcFunction`, `IntPatch_CSFunction`, `IntPatch_CurvIntSurf`, `IntPatch_GLine`, `IntPatch_HCurve2dTool`, `IntPatch_HInterTool`, `IntPatch_ImpImpIntersection`, `IntPatch_ImpPrmIntersection`, `IntPatch_InterferencePolyhedron`, `IntPatch_LineConstructor`, `IntPatch_PolyArc`, `IntPatch_PolyLine`, `IntPatch_Polygo`, `IntPatch_PolyhedronTool`, `IntPatch_PrmPrmIntersection`, `IntPatch_PrmPrmIntersection_T3Bits`, `IntPatch_SpecialPoints`, `IntPatch_TheIWLineOfTheIWalking`, `IntPatch_TheIWalking`, `IntPatch_ThePathPointOfTheSOnBounds`, `IntPatch_TheSOnBounds`, `IntPatch_TheSearchInside`, `IntPatch_TheSegmentOfTheSOnBounds`, `IntPatch_TheSurfFunction`, `IntPatch_WLineTool`, `Interface_Category`, `Interface_CheckFailure`, `Interface_CheckTool`, `Interface_CopyMap`, `Interface_EntityCluster`, `Interface_FileParameter`, `Interface_GTool`, `Interface_GlobalNodeOfGeneralLib`, `Interface_GlobalNodeOfReaderLib`, `Interface_IntVal`, `Interface_InterfaceMismatch`, `Interface_NodeOfGeneralLib`, `Interface_NodeOfReaderLib`, `Interface_ParamList`, `Interface_ParamSet`, `Interface_ReportEntity`, `Interface_STAT`, `Interface_ShareFlags`, `Interface_ShareTool`, `Interface_SignLabel`, `Interface_Static`, `Interface_TypedValue`, `Interface_UndefinedContent`, `OSD`, `OSD_Directory`, `OSD_DirectoryIterator`, `OSD_Disk`, `OSD_Environment`, `OSD_Exception`, `OSD_Exception_ACCESS_VIOLATION`, `OSD_Exception_ARRAY_BOUNDS_EXCEEDED`, `OSD_Exception_CTRL_BREAK`, `OSD_Exception_FLT_DENORMAL_OPERAND`, `OSD_Exception_FLT_DIVIDE_BY_ZERO`, `OSD_Exception_FLT_INEXACT_RESULT`, `OSD_Exception_FLT_INVALID_OPERATION`, `OSD_Exception_FLT_OVERFLOW`, `OSD_Exception_FLT_STACK_CHECK`, `OSD_Exception_FLT_UNDERFLOW`, `OSD_Exception_ILLEGAL_INSTRUCTION`, `OSD_Exception_INT_DIVIDE_BY_ZERO`, `OSD_Exception_INT_OVERFLOW`, `OSD_Exception_INVALID_DISPOSITION`, `OSD_Exception_IN_PAGE_ERROR`, `OSD_Exception_NONCONTINUABLE_EXCEPTION`, `OSD_Exception_PRIV_INSTRUCTION`, `OSD_Exception_STACK_OVERFLOW`, `OSD_Exception_STATUS_NO_MEMORY`, `OSD_FileIterator`, `OSD_Host`, `OSD_MAllocHook`, `OSD_MemInfo`, `OSD_OSDError`, `OSD_PerfMeter`, `OSD_Process`, `OSD_Protection`, `OSD_SIGBUS`, `OSD_SIGHUP`, `OSD_SIGILL`, `OSD_SIGINT`, `OSD_SIGKILL`, `OSD_SIGQUIT`, `OSD_SIGSEGV`, `OSD_SIGSYS`, `OSD_SharedLibrary`, `OSD_Signal`, `OpenGl_Aspects`, `OpenGl_AspectsProgram`, `OpenGl_AspectsSprite`, `OpenGl_AspectsTextureSet`, `OpenGl_BackgroundArray`, `OpenGl_CappingAlgo`, `OpenGl_CappingPlaneResource`, `OpenGl_Caps`, `OpenGl_Clipping`, `OpenGl_ClippingIterator`, `OpenGl_ClippingState`, `OpenGl_Context`, `OpenGl_Element`, `OpenGl_Flipper`, `OpenGl_Font`, `OpenGl_FrameBuffer`, `OpenGl_FrameStats`, `OpenGl_FrameStatsPrs`, `OpenGl_GraduatedTrihedron`, `OpenGl_GraphicDriver`, `OpenGl_Group`, `OpenGl_IndexBuffer`, `OpenGl_LayerList`, `OpenGl_LightSourceState`, `OpenGl_LineAttributes`, `OpenGl_MaterialState`, `OpenGl_ModelWorldState`, `OpenGl_NamedResource`, `OpenGl_OitState`, `OpenGl_PointSprite`, `OpenGl_PrimitiveArray`, `OpenGl_ProjectionState`, `OpenGl_RaytraceGeometry`, `OpenGl_Resource`, `OpenGl_Sampler`, `OpenGl_SetOfPrograms`, `OpenGl_SetOfShaderPrograms`, `OpenGl_ShaderManager`, `OpenGl_ShaderObject`, `OpenGl_ShaderProgram`, `OpenGl_ShaderUniformLocation`, `OpenGl_StateCounter`, `OpenGl_StateInterface`, `OpenGl_StencilTest`, `OpenGl_Structure`, `OpenGl_StructureShadow`, `OpenGl_Text`, `OpenGl_TextBuilder`, `OpenGl_Texture`, `OpenGl_TextureBufferArb`, `OpenGl_TextureFormat`, `OpenGl_TextureSet`, `OpenGl_TriangleSet`, `OpenGl_VariableSetterSelector`, `OpenGl_VertexBuffer`, `OpenGl_VertexBufferCompat`, `OpenGl_Window`, `OpenGl_Workspace`, `OpenGl_WorldViewState`, `WNT_ClassDefinitionError`
-* Added supported for the following specializations of the `NCollection_Array1` template class: `TColStd_Array1OfByte`, `Graphic3d_Array1OfAttribute`, `TColgp_Array1OfPnt`, `TColgp_Array1OfPnt2d`, `Poly_Array1OfTriangle`, `TColStd_Array1OfInteger`, `TShort_Array1OfShortReal`, `Quantity_Array1OfColor`, `TColgp_Array1OfDir`, `TColStd_Array1OfTransient`, `TColStd_Array1OfAsciiString`, `Interface_Array1OfHAsciiString`, `TColStd_Array1OfReal`, `TColGeom_Array1OfSurface`, `AppParCurves_Array1OfMultiPoint`, `TColgp_Array1OfVec`, `TColgp_Array1OfVec2d`, `AppDef_Array1OfMultiPointConstraint`, `AppParCurves_Array1OfConstraintCouple`, `AppParCurves_Array1OfMultiBSpCurve`, `AppParCurves_Array1OfMultiCurve`, `Approx_Array1OfAdHSurface`, `Approx_Array1OfGTrsf2d`, `BOPDS_VectorOfPave`, `BRepAdaptor_Array1OfCurve`, `TColStd_Array1OfBoolean`, `Extrema_Array1OfPOnCurv`, `Extrema_Array1OfPOnSurf`, `Bnd_Array1OfSphere`, `GeomFill_Array1OfLocationLaw`, `TopTools_Array1OfShape`, `GeomPlate_Array1OfSequenceOfReal`, `Plate_Array1OfPinpointConstraint`, `TColgp_Array1OfXYZ`, `GeomPlate_Array1OfHCurve`, `TColGeom2d_Array1OfCurve`, `GeomFill_Array1OfSectionLaw`, `ChFiDS_SecArray1`, `Bnd_Array1OfBox`, `Message_ArrayOfMsg`, `Bnd_Array1OfBox2d`, `TColStd_Array1OfListOfInteger`, `ChFiDS_StripeArray1`, `Expr_Array1OfNamedUnknown`, `Expr_Array1OfGeneralExpression`, `Expr_Array1OfSingleRelation`, `Extrema_Array1OfPOnCurv2d`, `TColgp_Array1OfXY`, `TColgp_Array1OfCirc2d`, `GccEnt_Array1OfPosition`, `TColgp_Array1OfLin2d`, `TColGeom2d_Array1OfBSplineCurve`, `TColGeom2d_Array1OfBezierCurve`, `TColGeom_Array1OfBSplineCurve`, `TColGeom_Array1OfBezierCurve`, `GeomLib_Array1OfMat`, `Graphic3d_ArrayOfIndexedMapOfStructure`, `HLRAlgo_Array1OfPHDat`, `HLRAlgo_Array1OfPINod`, `HLRAlgo_Array1OfPISeg`, `HLRAlgo_Array1OfTData`, `HLRBRep_Array1OfEData`, `HLRBRep_Array1OfFData`, `Intf_Array1OfLin`, `IGESAppli_Array1OfNode`, `IGESAppli_Array1OfFiniteElement`, `IGESData_Array1OfIGESEntity`, `IGESDraw_Array1OfConnectPoint`, `IGESGraph_Array1OfTextDisplayTemplate`, `IGESAppli_Array1OfFlow`, `IGESDefs_Array1OfTabularData`, `IGESGraph_Array1OfTextFontDef`, `IGESDimen_Array1OfGeneralNote`, `IGESBasic_Array1OfLineFontEntity`, `IGESData_Array1OfDirPart`, `IGESDimen_Array1OfLeaderArrow`, `IGESDraw_Array1OfViewKindEntity`, `IGESGraph_Array1OfColor`, `IGESGeom_Array1OfBoundary`, `IGESGeom_Array1OfCurveOnSurface`, `IGESGeom_Array1OfTransformationMatrix`, `IGESSolid_Array1OfLoop`, `IGESSolid_Array1OfFace`, `IGESSolid_Array1OfShell`, `IGESSolid_Array1OfVertexList`, `IntTools_Array1OfRange`, `IntTools_Array1OfRoots`, `Interface_Array1OfFileParameter`, `MeshVS_Array1OfSequenceOfInteger`, `StepDimTol_Array1OfDatumReferenceModifier`, `StepRepr_Array1OfRepresentationItem`, `StepVisual_Array1OfTessellatedItem`, `StepDimTol_Array1OfDatumSystemOrReference`, `StepVisual_Array1OfPresentationStyleSelect`, `StepVisual_Array1OfPresentationStyleAssignment`, `TColgp_Array1OfDir2d`, `TColGeom_Array1OfCurve`, `TColStd_Array1OfExtendedString`, `TDataStd_LabelArray1`, `TDataXtd_Array1OfTrsf`, `StepAP203_Array1OfApprovedItem`, `StepAP203_Array1OfCertifiedItem`, `StepAP203_Array1OfChangeRequestItem`, `StepAP203_Array1OfClassifiedItem`, `StepAP203_Array1OfContractedItem`, `StepAP203_Array1OfDateTimeItem`, `StepAP203_Array1OfPersonOrganizationItem`, `StepAP203_Array1OfSpecifiedItem`, `StepAP203_Array1OfStartRequestItem`, `StepAP203_Array1OfWorkItem`, `StepRepr_Array1OfMaterialPropertyRepresentation`, `StepFEA_Array1OfNodeRepresentation`, `StepAP214_Array1OfApprovalItem`, `StepAP214_Array1OfDateAndTimeItem`, `StepAP214_Array1OfDateItem`, `StepAP214_Array1OfDocumentReferenceItem`, `StepAP214_Array1OfExternalIdentificationItem`, `StepAP214_Array1OfGroupItem`, `StepAP214_Array1OfOrganizationItem`, `StepAP214_Array1OfPersonAndOrganizationItem`, `StepAP214_Array1OfPresentedItemSelect`, `StepAP214_Array1OfSecurityClassificationItem`, `StepAP214_Array1OfAutoDesignDateAndPersonItem`, `StepAP214_Array1OfAutoDesignDateAndTimeItem`, `StepAP214_Array1OfAutoDesignDatedItem`, `StepAP214_Array1OfAutoDesignGeneralOrgItem`, `StepAP214_Array1OfAutoDesignGroupedItem`, `StepAP214_Array1OfAutoDesignPresentedItemSelect`, `StepAP214_Array1OfAutoDesignReferencingItem`, `StepBasic_Array1OfApproval`, `StepBasic_Array1OfDerivedUnitElement`, `StepBasic_Array1OfDocument`, `StepBasic_Array1OfNamedUnit`, `StepBasic_Array1OfOrganization`, `StepBasic_Array1OfPerson`, `StepBasic_Array1OfProductContext`, `StepBasic_Array1OfProduct`, `StepBasic_Array1OfProductDefinition`, `StepBasic_Array1OfUncertaintyMeasureWithUnit`, `StepData_Array1OfField`, `StepDimTol_Array1OfDatumReference`, `StepDimTol_Array1OfDatumReferenceCompartment`, `StepDimTol_Array1OfDatumReferenceElement`, `StepDimTol_Array1OfGeometricToleranceModifier`, `StepDimTol_Array1OfToleranceZoneTarget`, `StepRepr_Array1OfShapeAspect`, `StepElement_Array1OfCurveElementEndReleasePacket`, `StepElement_Array1OfCurveElementSectionDefinition`, `StepElement_Array1OfHSequenceOfCurveElementPurposeMember`, `StepElement_Array1OfHSequenceOfSurfaceElementPurposeMember`, `StepElement_Array1OfMeasureOrUnspecifiedValue`, `StepElement_Array1OfSurfaceSection`, `StepElement_Array1OfVolumeElementPurpose`, `StepElement_Array1OfVolumeElementPurposeMember`, `StepFEA_Array1OfCurveElementEndOffset`, `StepFEA_Array1OfCurveElementEndRelease`, `StepFEA_Array1OfCurveElementInterval`, `StepFEA_Array1OfDegreeOfFreedom`, `StepFEA_Array1OfElementRepresentation`, `StepGeom_Array1OfCompositeCurveSegment`, `StepGeom_Array1OfBoundaryCurve`, `StepGeom_Array1OfCartesianPoint`, `StepGeom_Array1OfCurve`, `StepGeom_Array1OfPcurveOrSurface`, `StepGeom_Array1OfSurfaceBoundary`, `StepGeom_Array1OfTrimmingSelect`, `StepRepr_Array1OfPropertyDefinitionRepresentation`, `StepShape_Array1OfFaceBound`, `StepShape_Array1OfEdge`, `StepShape_Array1OfConnectedEdgeSet`, `StepShape_Array1OfFace`, `StepShape_Array1OfConnectedFaceSet`, `StepShape_Array1OfGeometricSetSelect`, `StepShape_Array1OfOrientedClosedShell`, `StepShape_Array1OfOrientedEdge`, `StepShape_Array1OfShapeDimensionRepresentationItem`, `StepShape_Array1OfShell`, `StepShape_Array1OfValueQualifier`, `StepVisual_Array1OfAnnotationPlaneElement`, `StepVisual_Array1OfBoxCharacteristicSelect`, `StepVisual_Array1OfCameraModelD3MultiClippingInterectionSelect`, `StepVisual_Array1OfCameraModelD3MultiClippingUnionSelect`, `StepVisual_Array1OfCurveStyleFontPattern`, `StepVisual_Array1OfDirectionCountSelect`, `StepVisual_Array1OfDraughtingCalloutElement`, `StepVisual_Array1OfFillStyleSelect`, `StepVisual_Array1OfInvisibleItem`, `StepVisual_Array1OfLayeredItem`, `StepVisual_Array1OfStyleContextSelect`, `StepVisual_Array1OfSurfaceStyleElementSelect`, `StepVisual_Array1OfTextOrCharacter`, `Storage_ArrayOfCallBack`, `Storage_ArrayOfSchema`, `Storage_PArray`, `TColQuantity_Array1OfLength`, `TColStd_Array1OfCharacter`, `TDF_AttributeArray1`, `TFunction_Array1OfDataMapOfGUIDDriver`, `TopOpeBRep_Array1OfVPointInter`, `TopOpeBRep_Array1OfLineInter`, `TopTools_Array1OfListOfShape`, `TopOpeBRepDS_Array1OfDataMapOfIntegerListOfInterference`, `math_Array1OfValueAndWeight`
-* Added supported for the following specializations of the `NCollection_List` template class: `TColStd_ListOfInteger`, `PrsMgr_ListOfPresentations`, `PrsMgr_ListOfPresentableObjects`, `SelectMgr_TriangFrustums`, `TopoDS_ListOfShape`, `AIS_ListOfInteractive`, `AIS_NListOfEntityOwner`, `SelectMgr_ListOfFilter`, `TopTools_ListOfShape`, `TColStd_ListOfTransient`, `V3d_ListOfLight`, `V3d_ListOfView`, `Message_ListOfAlert`, `BOPAlgo_ListOfCheckResult`, `BOPDS_ListOfPave`, `BOPDS_ListOfPaveBlock`, `IntSurf_ListOfPntOn2S`, `BOPTools_ListOfConnexityBlock`, `TopTools_ListOfListOfShape`, `BRep_ListOfPointRepresentation`, `BOPAlgo_ListOfEdgeInfo`, `DBRep_ListOfEdge`, `DBRep_ListOfFace`, `HLRBRep_ListOfBPoint`, `DBRep_ListOfHideData`, `BOPTools_ListOfCoupleOfShape`, `BRep_ListOfCurveRepresentation`, `BRepCheck_ListOfStatus`, `BRepFill_ListOfOffsetWire`, `ChFiDS_ListOfStripe`, `ChFiDS_Regularities`, `BRepOffset_ListOfInterval`, `TDF_LabelList`, `CDM_ListOfReferences`, `CDM_ListOfDocument`, `TColStd_ListOfReal`, `TopOpeBRepDS_ListOfInterference`, `ChFiDS_ListOfHElSpine`, `Law_Laws`, `DDF_TransactionStack`, `ExprIntrp_StackOfGeneralExpression`, `ExprIntrp_StackOfGeneralRelation`, `ExprIntrp_StackOfGeneralFunction`, `TColStd_ListOfAsciiString`, `FEmTool_ListOfVectors`, `Font_NListOfSystemFont`, `HLRAlgo_InterferenceList`, `HLRAlgo_ListOfBPoint`, `HLRBRep_ListOfBPnt2D`, `HLRTopoBRep_ListOfVData`, `IntAna_ListOfCurve`, `IntPolyh_ListOfCouples`, `IntTools_ListOfCurveRangeSample`, `IntTools_ListOfSurfaceRangeSample`, `IntTools_ListOfBox`, `MeshVS_PolyhedronVerts`, `Message_ListOfMsg`, `NLPlate_StackOfPlate`, `Poly_ListOfTriangulation`, `Prs3d_NListOfSequenceOfPnt`, `QANCollection_ListOfPnt`, `TDataStd_ListOfExtendedString`, `TDataStd_ListOfByte`, `TDF_AttributeList`, `TNaming_ListOfNamedShape`, `TDF_AttributeDeltaList`, `TDF_IDList`, `TDF_DeltaList`, `TNaming_ListOfIndexedDataMapOfShapeListOfShape`, `TNaming_ListOfMapOfShape`, `TopBas_ListOfTestInterference`, `TopOpeBRep_ListOfBipoint`, `TopOpeBRepBuild_ListOfLoop`, `TopOpeBRepBuild_ListOfListOfLoop`, `TopOpeBRepBuild_ListOfShapeListOfShape`, `TopOpeBRepBuild_ListOfPave`, `TopOpeBRepTool_ListOfC2DF`, `VrmlData_ListOfNode`
+- Updated builds.
-## v1.0.2
-* added constructors for `TColgp_Array1OfPnt` as manual bindings
+### v1.0.0
-## v1.0.1
-* Updated builds
+- First version using Embind and automatically generated bindings.
+- Lots of breaking changes in this version. Most notably:
+ - Overloaded methods and constructors are now fully supported (on all supported classes). Please have a look at the [conventions](embind/conventions.md) for details.
+ - Static methods have a slightly different interface. Before, you would call them via `openCascade.ClassName.prototype.staticMethod()`. Now, you call them via `openCascade.ClassName.staticMethod()`.
+- Largely improved coverage of the OpenCascade API.
+- TypeScript support has been removed. It will be added back in, soon.
-## v1.0.0
-* First version using Embind and automatically generated bindings.
-* Lots of breaking changes in this version. Most notably:
- * Overloaded methods and constructors are now fully supported (on all supported classes). Please have a look at the [conventions](embind/conventions.md) for details.
- * Static methods have a slightly different interface. Before, you would call them via `openCascade.ClassName.prototype.staticMethod()`. Now, you call them via `openCascade.ClassName.staticMethod()`.
-* Largely improved coverage of the OpenCascade API
-* Typescript support has been removed. It will be added back in, soon.
+### v0.1.19
-## v0.1.19
-* Last version with WebIDL bindings.
+- Last version with WebIDL bindings.
diff --git a/DEPS.json b/DEPS.json
new file mode 100644
index 00000000..1535a8a3
--- /dev/null
+++ b/DEPS.json
@@ -0,0 +1,50 @@
+{
+ "$schema": "deps-lock-v1",
+ "description": "Pinned dependency versions for reproducible opencascade.js builds. Both Dockerfile and build-wasm.sh reference this file.",
+ "dependencies": {
+ "occt": {
+ "repository": "https://github.com/Open-Cascade-SAS/OCCT.git",
+ "commit": "d3056ef80c9668f395da40f5fd7be186cae4501f",
+ "version": "V8_0_0",
+ "description": "Open CASCADE Technology — the C++ CAD kernel"
+ },
+ "rapidjson": {
+ "repository": "https://github.com/Tencent/rapidjson.git",
+ "commit": "24b5e7a8b27f42fa16b96fc70aade9106cf7102f",
+ "version": "post-1.1.0 (master)",
+ "description": "JSON parser/generator for C++ (header-only)"
+ },
+ "freetype": {
+ "repository": "https://github.com/freetype/freetype.git",
+ "commit": "de8b92dd7ec634e9e2b25ef534c54a3537555c11",
+ "version": "VER-2-13-0",
+ "description": "Font rendering library"
+ },
+ "emscripten": {
+ "repository": "https://github.com/emscripten-core/emsdk.git",
+ "docker_image": "emscripten/emsdk:5.0.1",
+ "docker_digest": "sha256:c89732ef63a56de5a96395c5a8c1c7904f7420131a045406e6fedc4cbe1cc198",
+ "emsdk_version": "5.0.1",
+ "description": "Emscripten SDK for compiling C++ to WebAssembly"
+ },
+ "llvm17": {
+ "version": "17.0.6",
+ "description": "Vendored prebuilt LLVM 17 — parse-side libc++ + clang resource headers for libclang 18.1.1 (N-1 compat window per libc++ support policy).",
+ "base_url": "https://github.com/llvm/llvm-project/releases/download/llvmorg-17.0.6",
+ "platforms": {
+ "darwin-arm64": {
+ "filename": "clang+llvm-17.0.6-arm64-apple-darwin22.0.tar.xz",
+ "sha256": "1264eb3c2a4a6d5e9354c3e5dc5cb6c6481e678f6456f36d2e0e566e9400fcad"
+ },
+ "linux-x86_64": {
+ "filename": "clang+llvm-17.0.6-x86_64-linux-gnu-ubuntu-22.04.tar.xz",
+ "sha256": "884ee67d647d77e58740c1e645649e29ae9e8a6fe87c1376be0f3a30f3cc9ab3"
+ },
+ "linux-aarch64": {
+ "filename": "clang+llvm-17.0.6-aarch64-linux-gnu.tar.xz",
+ "sha256": "6dd62762285326f223f40b8e4f2864b5c372de3f7de0731cb7cd55ca5287b75a"
+ }
+ }
+ }
+ }
+}
diff --git a/Dockerfile b/Dockerfile
index d3c5d9a6..0bde0df9 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,75 +1,518 @@
-FROM emscripten/emsdk:3.1.14 AS base-image
-
-RUN \
- apt update -y && \
- apt install -y \
- bash \
- build-essential \
- cmake \
- curl \
- git \
- libffi-dev \
- libgdbm-dev \
- libncurses5-dev \
- libnss3-dev \
- libreadline-dev \
- libsqlite3-dev \
- libssl-dev \
- libbz2-dev \
- npm \
- python3 \
- python3-pip \
- python3-setuptools \
- zlib1g-dev
-
-RUN \
- pip install \
- libclang==15.0.6.1 \
- pyyaml==6.0 \
- cerberus==1.3.4 \
- argparse==1.4.0
-
-WORKDIR /rapidjson/
-RUN \
- git clone -b v1.1.0 https://github.com/Tencent/rapidjson.git .
-
-WORKDIR /freetype/
-RUN \
- git clone -b VER-2-13-0 https://github.com/freetype/freetype.git .
-
-ENV OCCT_COMMIT_HASH_FULL bb368e271e24f63078129283148ce83db6b9670a
-WORKDIR /occt/
-RUN \
- curl "https://git.dev.opencascade.org/gitweb/?p=occt.git;a=snapshot;h=${OCCT_COMMIT_HASH_FULL};sf=tgz" -o occt.tar.gz && \
- tar -xvf occt.tar.gz && \
- export OCCT_COMMIT_HASH=$(echo ${OCCT_COMMIT_HASH_FULL} | cut -c 1-7) && \
- mv occt-$OCCT_COMMIT_HASH/* . && \
- mv occt-$OCCT_COMMIT_HASH/.* . || true && \
- rm occt-$OCCT_COMMIT_HASH -r
+# opencascade.js — OCCT V8 WASM build image
+#
+# Build:
+# DOCKER_BUILDKIT=1 docker build -t opencascade-js .
+#
+# Per-tag production builds (consumer images):
+# docker buildx build --target final-single -t opencascade-js:single-threaded .
+# docker buildx build --target final-multi -t opencascade-js:multi-threaded .
+# docker buildx build --target bindgen-base -t opencascade-js:bindgen-base .
+#
+# Default target is final-single (matches the canonical Quickstart tag).
+#
+# Run (single-mount Quickstart — outputs land next to your YAML):
+# docker run --rm \
+# -v "$(pwd):/src" \
+# -u "$(id -u):$(id -g)" \
+# opencascade-js link my.yml
+#
+# Persistent caching across runs (recommended for iterative work):
+# docker volume create ocjs-nx-cache ocjs-build-cache
+# docker run --rm \
+# -v ocjs-nx-cache:/opencascade.js/.nx \
+# -v ocjs-build-cache:/opencascade.js/build \
+# -v "$(pwd):/src" \
+# -u "$(id -u):$(id -g)" \
+# opencascade-js link my.yml
+#
+# Environment overrides:
+# docker run -e OCJS_OPT="-Os" -e OCJS_EXCEPTIONS=1 ... opencascade-js link my.yml
+#
+# YAML path resolution: relative paths (e.g. `link my.yml`) resolve against
+# the bind-mounted WORKDIR (/src). Absolute paths (e.g. `link /src/my.yml`)
+# are honoured as-is. See scripts/docker-entrypoint.sh::show_help for details.
+#
+# ─────────────────────────────────────────────────────────────────────────────
+# Stage architecture (5 logical stages; final-{threading} are thin tag-bearing
+# stages over the matching compiled-{threading} stage):
+#
+# deps-base OS toolchain (emsdk + apt + Node 24 + uv + Python 3.14)
+# + clone-deps.sh (OCCT/rapidjson/freetype/LLVM 17 tarball)
+# + LLVM 17 trim (~5 GB pruned in-RUN to ~250 MB)
+# + apt/uv cache purge
+# → invariant under in-repo source changes
+# → not published
+#
+# bindgen-base deps-base + npm ci + apply-patches + pch + generate
+# + delete generated .cpp/.h sources in same RUN
+# → invariant under threading config
+# → published as `:bindgen-base` (custom-bindings starting point)
+# → consumers re-run `generate` against their own YAML
+#
+# compiled-single-threaded bindgen-base + (re)generate + compile-bindings
+# compiled-multi-threaded + compile-sources (CMake static libs)
+# + delete .cpp/.h sources, .cpp.o.d dep files, CMake scratch
+# → fan-out per ARG threading
+# → not published directly; final-{threading} adds metadata
+#
+# final-single compiled-{threading} + OCI labels + WORKDIR + ENTRYPOINT + CMD
+# final-multi → published as `:single-threaded` / `:multi-threaded`
+#
+# Each named stage is independently buildable via `--target`. R10 in-RUN pruning
+# is applied at every heavy stage; deletions stay inside the same RUN block so
+# Docker layer storage actually shrinks (whiteout markers over fat parent layers
+# would not).
+#
+# Notes on the underlying build pipeline:
+# - All dependency fetching (OCCT/rapidjson/freetype git clones, Python venv,
+# LLVM 17 tarball) is delegated to scripts/clone-deps.sh — the same script
+# the host build uses. The Dockerfile is a thin OS+toolchain layer on top.
+# - emsdk is the only dep clone-deps.sh skips here: the base image already
+# ships /emsdk with the `emsdk` launcher, and the script's §2 explicitly
+# detects this via `[ -x $EMSDK_DIR/emsdk ]`. A pre-symlink at
+# /opencascade.js/deps/emsdk → /emsdk activates that path.
+# - apt-installed Doxygen satisfies _ensure_doxygen at runtime (no GitHub download).
+# - The entrypoint dispatches recognised subcommands through `npx nx run` so
+# consumers benefit from Nx's content-addressed cache (warm runs ≤ 5 min).
+
+# syntax=docker/dockerfile:1.7
+
+# ═════════════════════════════════════════════════════════════════════════════
+# Stage 1: deps-base
+# OS toolchain + dependency clones, with LLVM 17 trim and cache purge folded
+# into the clone-deps RUN so all of those bytes are gone from the layer.
+# ═════════════════════════════════════════════════════════════════════════════
+FROM emscripten/emsdk:5.0.1@sha256:c89732ef63a56de5a96395c5a8c1c7904f7420131a045406e6fedc4cbe1cc198 AS deps-base
+
+LABEL org.opencontainers.image.title="opencascade.js (deps-base)" \
+ org.opencontainers.image.description="OS toolchain + dependency clones (emsdk, Node 24, uv, Python 3.14, OCCT, rapidjson, freetype, LLVM 17 — header-trimmed)"
+
+# ── System packages ─────────────────────────────────────────────────────────
+# Notes on what is intentionally NOT installed:
+# - cmake: installed via the PyPI wheel `cmake==4.3.2` in the venv below.
+# Keeps host (`brew install cmake@4`) and container on the same major.
+# - python3/python3-pip/python3-venv: replaced by `uv python install 3.14.4`
+# which downloads python-build-standalone — bit-identical interpreter
+# lineage on macOS arm64 and Linux arm64. Foundation for libclang
+# parse-environment parity (see src/ocjs_bindgen/config/paths.py).
+RUN --mount=type=cache,target=/var/cache/apt,id=ocjs-apt,sharing=locked \
+ --mount=type=cache,target=/var/lib/apt/lists,id=ocjs-apt-lists,sharing=locked \
+ apt-get update -y && \
+ apt-get install -y --no-install-recommends \
+ bash \
+ build-essential \
+ ca-certificates \
+ curl \
+ doxygen \
+ git \
+ gnupg \
+ jq \
+ libc6-dev \
+ unzip \
+ xz-utils
+
+# libc6-dev note: provides /usr/include/sys/types.h + friends (glibc userspace
+# headers) that `_get_host_libc_include()` in src/ocjs_bindgen/config/paths.py
+# routes libclang's parse pass at. Without this package, /usr/include has only
+# /usr/include/stdint.h (from linux-libc-dev that build-essential pulls in) and
+# OCCT headers transitively requesting fail to parse — the same
+# silent type-degradation cascade that has historically struck libc++/libc
+# version mismatches, just triggered by missing libc instead of mismatched
+# libc++. On macOS Apple's SDK bundles a complete libc by default; on Linux it
+# is a separate package.
+
+# ── Node.js 24 (NodeSource) ─────────────────────────────────────────────────
+RUN --mount=type=cache,target=/var/cache/apt,id=ocjs-apt,sharing=locked \
+ --mount=type=cache,target=/var/lib/apt/lists,id=ocjs-apt-lists,sharing=locked \
+ curl -fsSL https://deb.nodesource.com/setup_24.x | bash - && \
+ apt-get install -y --no-install-recommends nodejs
+
+# ── uv (Python toolchain manager) + Python 3.14.4 ───────────────────────────
+# uv installs python-build-standalone — same upstream CPython binary lineage
+# on macOS arm64 and Linux arm64 for a given release tag. Replaces both apt
+# python3* packages and pyenv. Host bootstrap is identical (see MAINTAINER.md).
+#
+# UV_PYTHON_INSTALL_DIR=/opt/uv-python relocates uv's python tree from
+# /root/.local/share/uv/python/… (which has mode 0700 by default and breaks
+# non-root execution via `docker run -u "$(id -u):$(id -g)"`) to a
+# world-traversable /opt subtree. The venv at /opencascade.js/.venv/bin/python
+# symlinks into this tree; without the relocation, non-root containers fail
+# at startup with "python not found" because the symlink target lives under
+# a directory the unprivileged user cannot traverse.
+ENV UV_PYTHON_INSTALL_DIR=/opt/uv-python
+RUN curl -LsSf https://astral.sh/uv/install.sh | \
+ env UV_INSTALL_DIR=/usr/local/bin INSTALLER_NO_MODIFY_PATH=1 sh && \
+ uv python install 3.14.4 && \
+ chmod -R go+rX /opt/uv-python
+
+# Put /usr/local/bin (uv) ahead of emsdk's bundled Node 22 so `node`/`npm`
+# resolve to the NodeSource-installed v24. The venv path gets prepended
+# below after clone-deps.sh creates it.
+#
+# Emcc still uses its bundled Node 22 internally via the NODE_JS absolute
+# path in /emsdk/.emscripten — that's how emscripten orchestrates its own
+# toolchain and is independent of $PATH lookups. We only need Node 24 for
+# our project's `npx nx run …` / `npm ci` invocations, matching the host's
+# Node version (see .nvmrc and package.json:engines).
+ENV PATH="/opencascade.js/.venv/bin:/usr/local/bin:/usr/bin:/bin:${PATH}"
WORKDIR /opencascade.js/
+
+# Pre-create the venv with the pinned Python so /opencascade.js/.venv/bin/python3
+# lands on PATH BEFORE clone-deps.sh runs (its line 53 requires python3 to parse
+# DEPS.json). The script's §3 fast-paths past an already-created venv and still
+# runs `uv pip install -r requirements.txt`, so this does NOT re-duplicate the
+# pip-install logic — it just bootstraps the python3 binary the script needs to
+# function. The base image intentionally has no system python3 (see uv-only
+# note above).
+RUN uv venv --python 3.14.4 /opencascade.js/.venv
+
+RUN mkdir -p /opencascade.js/deps && \
+ ln -s /emsdk /opencascade.js/deps/emsdk
+
+COPY DEPS.json requirements.txt /opencascade.js/
+COPY scripts/clone-deps.sh /opencascade.js/scripts/clone-deps.sh
+
+# ── Dependency fetch + LLVM 17 trim + cache purge (mega-RUN, R10) ───────────
+# clone-deps.sh §1-§4 fetches: OCCT/rapidjson/freetype git checkouts,
+# Python .venv pip install, LLVM 17 tarball extract (~5.6 GB).
+#
+# LLVM 17 trim: src/ocjs_bindgen/config/paths.py consumes only:
+# - deps/llvm-17/include/c++/v1/ (libc++ generic headers)
+# - deps/llvm-17/include//c++/v1/ (libc++ __config_site —
+# Linux tarballs only;
+# Apple bundles it under
+# c++/v1/ directly)
+# - deps/llvm-17/lib/clang/17/include/ (clang resource headers)
+# The actual libclang.so used by the parse pass is the pip wheel
+# `libclang==18.1.1`. Everything else in the LLVM 17 tarball (bin/, the rest
+# of lib/, libexec/, share/) is unused by the build and prunable.
+# We retain all of include/ (~100 MB) rather than just include/c++/ because
+# pruning the target-triple subdir hides __config_site (a hard requirement
+# for libc++ <__config> to parse) — see paths.py::_get_libc_include_args.
+#
+# uv pip cache: cleared because the venv is now fully populated and the
+# downloaded wheel cache (~150 MB) is dead weight in the image.
+RUN bash scripts/clone-deps.sh --dest /opencascade.js/deps && \
+ echo "── Trimming LLVM 17 vendored tarball (R10) ────────────────────────" && \
+ find /opencascade.js/deps/llvm-17 -mindepth 1 -maxdepth 1 \
+ ! -name include \
+ ! -name lib \
+ -exec rm -rf {} + && \
+ find /opencascade.js/deps/llvm-17/lib -mindepth 1 -maxdepth 1 \
+ ! -name clang \
+ -exec rm -rf {} + && \
+ find /opencascade.js/deps/llvm-17/lib/clang -mindepth 1 -maxdepth 1 \
+ ! -name 17 \
+ -exec rm -rf {} + && \
+ find /opencascade.js/deps/llvm-17/lib/clang/17 -mindepth 1 -maxdepth 1 \
+ ! -name include \
+ -exec rm -rf {} + && \
+ echo "── LLVM 17 retained:" && \
+ du -sh /opencascade.js/deps/llvm-17 && \
+ echo "── Purging uv pip cache + apt lists ───────────────────────────────" && \
+ uv cache clean && \
+ rm -rf /root/.cache /tmp/* /var/tmp/* && \
+ apt-get clean
+
+# Convenience top-level symlinks: preserve the long-standing /occt, /rapidjson,
+# /freetype, /llvm-17 paths so the `ENV OCCT_ROOT=/occt` defaults below (and
+# any external bind-mount UX like `-v /my/occt:/occt`) keep working. The real
+# bytes live under /opencascade.js/deps/; these are just aliases.
+RUN ln -s /opencascade.js/deps/OCCT /occt && \
+ ln -s /opencascade.js/deps/rapidjson /rapidjson && \
+ ln -s /opencascade.js/deps/freetype /freetype && \
+ ln -s /opencascade.js/deps/llvm-17 /llvm-17
+
+# ═════════════════════════════════════════════════════════════════════════════
+# Stage 2: bindgen-base
+# In-repo build system + npm ci + apply-patches + pch + generate, with
+# generated .cpp/.h sources pruned in-RUN. Published as :bindgen-base — the
+# custom-bindings starting point. Consumers re-run `generate` against their
+# own YAML in the compile-bindings flow.
+# ═════════════════════════════════════════════════════════════════════════════
+# bindgen-content holds every heavy build artifact (apply-patches + pch +
+# generate + non-root perm chmod) but does NOT include the runtime entrypoint
+# COPY or OCI labels. The published `:bindgen-base` image and the `compiled-*`
+# stages both derive from this content layer.
+#
+# Splitting the published `bindgen-base` stage off this content layer is the
+# architectural pre-condition for entrypoint patches being a thin terminal-
+# layer change: when scripts/docker-entrypoint.sh changes, the COPY layer in
+# the published `bindgen-base` and the `final-*` stages cache-miss, but
+# `bindgen-content` (and therefore `compiled-single-threaded` /
+# `compiled-multi-threaded`) cache-hit because they don't reference the
+# entrypoint script at all.
+FROM deps-base AS bindgen-content
+
+# Install Nx CLI + project devDeps deterministically from package-lock.json
+COPY package.json package-lock.json nx.json project.json /opencascade.js/
+RUN --mount=type=cache,target=/root/.npm,id=ocjs-npm,sharing=locked \
+ npm ci --no-audit --no-fund
+
+# Copy the build system. DEPS.json + scripts/clone-deps.sh were copied above
+# (they are inputs to the dep-fetch RUN); this stage brings in the rest of
+# the build system using an explicit allow-list of build-time scripts so the
+# runtime-only docker-entrypoint.sh can be COPYed late in each ENTRYPOINT-
+# bearing stage. That keeps future entrypoint patches as a thin terminal-
+# layer change instead of invalidating apply-patches/pch/generate and the
+# multi-GB compiled-* layers downstream.
+#
+# scripts/docker-entrypoint.sh — runtime, late-COPYed in final-* + bindgen-base
+# scripts/docker-e2e-validate.sh — host-only, never enters the image
+# scripts/clone-deps.sh — already in deps-base (line above), excluded here
COPY src ./src
-WORKDIR /src/
+COPY tsconfig.json* ./
+COPY build-configs ./build-configs
+COPY build-wasm.sh ./build-wasm.sh
+COPY scripts/enumerate-symbols.py scripts/validate-build.py scripts/generate-docs.mjs ./scripts/
+COPY scripts/lib ./scripts/lib
+COPY bindgen-filters.yaml ./bindgen-filters.yaml
+RUN chmod +x build-wasm.sh
+
+# ── Default environment ─────────────────────────────────────────────────────
+# The named configuration in build-configs/configurations.json drives every
+# build flag (-O3, SIMD, mimalloc, eval_ctors, closure, threading, etc.).
+# Override at runtime with `-e OCJS_CONFIG=` (see
+# build-configs/configurations.json for available named configurations) or
+# per-flag overrides (`-e OCJS_OPT=-Os`, etc.).
+ENV OCCT_ROOT=/occt
+ENV RAPIDJSON_ROOT=/rapidjson
+ENV FREETYPE_ROOT=/freetype
+ENV EMSDK=/emsdk
+# OCCT source patches (using-statement, Standard_Dump stub, noexcept dtors,
+# STEPCAF DynamicType) are HARD REQUIREMENTS for every supported build —
+# they're applied unconditionally by build-wasm.sh::step_apply_patches.
+# The legacy OCJS_PATCH_DUMP / OCJS_PATCH_STEPCAF env-var toggles were
+# removed because making required behaviour optional is a footgun.
+# Output directory defaults to /src (the canonical Quickstart mount point)
+# so single-mount `docker run -v "$(pwd):/src" …` writes artifacts next to
+# the consumer's YAML automatically. Override with `-e OCJS_OUTPUT_DIR=`
+# + a matching `-v` mount for power users who want a separate output dir.
+ENV OCJS_OUTPUT_DIR=/src
+# Strict-types guardrail: defaults to warn-only -- the link step always
+# prints a triage summary to stderr if the .d.ts contains rewrites-to-
+# `unknown` method signatures or unbound class references (the silent
+# type-loss failure mode from the May-2026 replicad regression). The
+# build proceeds. CI consumers who want to escalate the warning to a
+# hard build failure should set OCJS_STRICT_TYPES=1 explicitly at
+# `docker run` time. See `ocjs_bindgen.link.yaml_build._enforce_strict_types_gate`
+# for the policy.
+
+RUN mkdir -p build/bindings build/sources
+
+# ── apply-patches + pch + generate + prune (mega-RUN, R10) ──────────────────
+# Apply OCCT patches, build flat includes + PCH, generate Embind .cpp + .h +
+# .d.ts.json fragments — then delete the generated .cpp/.h sources INSIDE
+# this same RUN so they never appear in any image layer. PCH (the expensive
+# bit, ~600 MB) and .d.ts.json (the type-graph index, ~few MB) are kept.
+#
+# Consumers of :bindgen-base who want a custom YAML build re-run `generate`
+# against their own YAML; the cached PCH + patched OCCT tree make that step
+# fast (~10-30s). The compiled-{threading} child stages also re-run
+# `generate` because they need the .cpp files back to compile against.
+# ── apply-patches + pch + generate + prune + non-root perms (mega-RUN) ──────
+# Folding `chmod -R go+w` for the writable-by-non-root paths INTO this same
+# RUN is critical: a separate `chmod -R` layer copies every modified inode
+# (PCH ≈ 600 MB, build/ tree ≈ 1.5 GB) into the new overlay layer because
+# overlayfs treats permission changes as content changes — that produces a
+# ~2 GB duplicate layer for what should be a metadata-only operation. By
+# applying chmod in-place inside the same RUN, the perms commit alongside
+# the original file content with zero duplication.
+#
+# Consumers running with `docker run -u "$(id -u):$(id -g)"` need writable
+# locations for Nx's content-addressed cache (.nx), build outputs (build/),
+# and emsdk's per-run scratch. Without this chmod, the first non-root run
+# fails with EACCES when Nx tries to create its .nx subdirectory under
+# /opencascade.js (root:root mode 0755 by default).
+RUN npx nx run ocjs:apply-patches && \
+ npx nx run ocjs:pch && \
+ npx nx run ocjs:generate && \
+ echo "── Pruning generated .cpp/.h sources (kept: .d.ts.json + PCH) ────" && \
+ find build/bindings -type f -name '*.cpp' -delete && \
+ find build/bindings -type f -name '*.h' -delete && \
+ rm -rf /root/.npm/_cacache && \
+ echo "── Setting non-root execution perms (folded; avoids 2 GB chmod layer) ──" && \
+ mkdir -p /opencascade.js/.nx && \
+ chmod -R go+w /opencascade.js/.nx /opencascade.js/build && \
+ chmod go+w /opencascade.js && \
+ echo "── Allowing git on vendored OCCT/rapidjson/freetype for non-root runs ──" && \
+ git config --system --add safe.directory '*' && \
+ echo "── Marking .venv/.deps-ready (skip uv pip install on non-root rerun) ──" && \
+ touch /opencascade.js/.venv/.deps-ready && \
+ chmod go+w /opencascade.js/.venv/.deps-ready && \
+ echo "── Making emsdk libembind.js writable for non-root reset+repatch ──" && \
+ chmod go+w /emsdk/upstream/emscripten/src/lib \
+ /emsdk/upstream/emscripten/src/lib/libembind.js
+
+# ═════════════════════════════════════════════════════════════════════════════
+# Stage 2b: bindgen-base (published as ghcr.io/taucad/opencascade.js:bindgen-base)
+#
+# Thin published wrapper around `bindgen-content`: adds OCI labels, the
+# late-COPY of the runtime entrypoint, WORKDIR/ENTRYPOINT/CMD. Patching
+# `scripts/docker-entrypoint.sh` invalidates only the COPY + ENTRYPOINT
+# layers here (and the equivalents in `final-single` / `final-multi`); the
+# heavy `bindgen-content` stage and the downstream `compiled-*` stages
+# cache-hit because they never reference the entrypoint script.
+# ═════════════════════════════════════════════════════════════════════════════
+FROM bindgen-content AS bindgen-base
+
+# ── OCI metadata for the published :bindgen-base image ──────────────────────
+ARG REVISION
+ARG VERSION
+ARG SOURCE_URL=https://github.com/taucad/opencascade.js
+LABEL org.opencontainers.image.title="opencascade.js (bindgen-base)" \
+ org.opencontainers.image.description="Custom-bindings starting point: OCCT patches + PCH + generate index pre-baked (.cpp sources pruned; re-run generate against your YAML)" \
+ org.opencontainers.image.source="${SOURCE_URL}" \
+ org.opencontainers.image.url="${SOURCE_URL}" \
+ org.opencontainers.image.revision="${REVISION}" \
+ org.opencontainers.image.version="${VERSION}" \
+ org.opencontainers.image.licenses="LGPL-2.1-only" \
+ org.opencontainers.image.vendor="taucad"
+
+# R17: :bindgen-base ships with the same docker-entrypoint dispatcher as the
+# final-{threading} images so consumers get a consistent UX across all
+# published tags. Consumers wanting interactive shell override the entrypoint:
+# docker run --rm -it --entrypoint bash ghcr.io/taucad/opencascade.js:bindgen-base
+COPY scripts/docker-entrypoint.sh /opencascade.js/scripts/docker-entrypoint.sh
+WORKDIR /src
+ENTRYPOINT ["/opencascade.js/scripts/docker-entrypoint.sh"]
+CMD ["--help"]
+
+# ═════════════════════════════════════════════════════════════════════════════
+# Stage 3a: compiled-single-threaded
+# ═════════════════════════════════════════════════════════════════════════════
+# Note the `FROM bindgen-content` (not `bindgen-base`): inheriting from the
+# pre-COPY content layer is what isolates `compiled-*` from entrypoint patches.
+FROM bindgen-content AS compiled-single-threaded
+
+# Reset to /opencascade.js for the build-tree RUNs; final-* will WORKDIR /src.
+WORKDIR /opencascade.js/
+
+# Nx daemon plugin workers fail under Docker+qemu (linux/amd64 on arm64 hosts):
+# "Failed to start plugin worker for plugin nx/core/package-json". Disabling
+# here keeps bindgen-content cacheable while fixing compiled-* + consumer link.
+ENV NX_DAEMON=false
+ENV OCJS_CONFIG=single-threaded
+ENV THREADING=single-threaded
+
+# ── (re)generate + compile-bindings + compile-sources + prune (mega-RUN) ────
+# bindgen-base deleted the generated .cpp/.h files from its own layer so the
+# published :bindgen-base image stays small. compiled-{threading} re-runs
+# generate (cheap given PCH + patches are cached) to materialise the .cpp
+# files, then compiles them, then prunes the source files + CMake scratch.
+# .o files for bindings + OCCT static .a libs are kept (needed for link).
+RUN --mount=type=cache,target=/emsdk/upstream/emscripten/cache,id=ocjs-emsdk-${OCJS_CONFIG},sharing=locked \
+ npx nx run ocjs:generate && \
+ npx nx run ocjs:compile-bindings && \
+ npx nx run ocjs:compile-sources && \
+ echo "── Pruning compile intermediates (kept: .o files + OCCT .a libs) ──" && \
+ find build/bindings -type f -name '*.cpp' -delete && \
+ find build/bindings -type f -name '*.h' -delete && \
+ find build -type f -name '*.cpp.o.d' -delete && \
+ if [ -d build/occt-cmake ]; then \
+ find build/occt-cmake -mindepth 1 -maxdepth 2 \
+ ! -path 'build/occt-cmake/lin32' \
+ ! -path 'build/occt-cmake/lin32/clang' \
+ -prune -exec rm -rf {} + ; \
+ find build/occt-cmake/lin32/clang -mindepth 1 -maxdepth 1 \
+ ! -name lib \
+ ! -name bin \
+ -exec rm -rf {} + ; \
+ fi && \
+ echo "── Re-applying non-root perms (folded; bindgen-base chmod stale here) ──" && \
+ chmod -R go+w /opencascade.js/.nx /opencascade.js/build
+
+# ═════════════════════════════════════════════════════════════════════════════
+# Stage 3b: compiled-multi-threaded
+# ═════════════════════════════════════════════════════════════════════════════
+FROM bindgen-content AS compiled-multi-threaded
+
+WORKDIR /opencascade.js/
+
+ENV NX_DAEMON=false
+ENV OCJS_CONFIG=multi-threaded
+ENV THREADING=multi-threaded
+
+RUN --mount=type=cache,target=/emsdk/upstream/emscripten/cache,id=ocjs-emsdk-${OCJS_CONFIG},sharing=locked \
+ npx nx run ocjs:generate && \
+ npx nx run ocjs:compile-bindings && \
+ npx nx run ocjs:compile-sources && \
+ echo "── Pruning compile intermediates (kept: .o files + OCCT .a libs) ──" && \
+ find build/bindings -type f -name '*.cpp' -delete && \
+ find build/bindings -type f -name '*.h' -delete && \
+ find build -type f -name '*.cpp.o.d' -delete && \
+ if [ -d build/occt-cmake ]; then \
+ find build/occt-cmake -mindepth 1 -maxdepth 2 \
+ ! -path 'build/occt-cmake/lin32' \
+ ! -path 'build/occt-cmake/lin32/clang' \
+ -prune -exec rm -rf {} + ; \
+ find build/occt-cmake/lin32/clang -mindepth 1 -maxdepth 1 \
+ ! -name lib \
+ ! -name bin \
+ -exec rm -rf {} + ; \
+ fi && \
+ echo "── Re-applying non-root perms (folded; bindgen-base chmod stale here) ──" && \
+ chmod -R go+w /opencascade.js/.nx /opencascade.js/build
+
+# ═════════════════════════════════════════════════════════════════════════════
+# Stage 4a: final-single (published as ghcr.io/taucad/opencascade.js:single-threaded)
+# ═════════════════════════════════════════════════════════════════════════════
+FROM compiled-single-threaded AS final-single
-ARG threading=single-threaded
-ENV threading=$threading
+# ── OCI image metadata ──────────────────────────────────────────────────────
+# REVISION/VERSION are injected by CI (docker/metadata-action + github.sha);
+# SOURCE_URL defaults to the taucad fork and can be overridden for downstream
+# rebuilds. Labels follow the opencontainers.org spec so `docker inspect` and
+# GHCR's UI surface provenance, licensing, and source links automatically.
+ARG REVISION
+ARG VERSION
+ARG SOURCE_URL=https://github.com/taucad/opencascade.js
+LABEL org.opencontainers.image.title="opencascade.js (single-threaded)" \
+ org.opencontainers.image.description="OpenCASCADE.js single-threaded WASM build image (warm cache, ≤5min link)" \
+ org.opencontainers.image.source="${SOURCE_URL}" \
+ org.opencontainers.image.url="${SOURCE_URL}" \
+ org.opencontainers.image.revision="${REVISION}" \
+ org.opencontainers.image.version="${VERSION}" \
+ org.opencontainers.image.licenses="LGPL-2.1-only" \
+ org.opencontainers.image.vendor="taucad"
-FROM base-image AS test-image
+# WORKDIR /src makes the consumer's bind-mounted YAML directory the working
+# directory at runtime. Combined with `ENV OCJS_OUTPUT_DIR=/src` in
+# bindgen-base, the canonical single-mount Quickstart pattern
+# (`docker run -v "$(pwd):/src" …`) writes artifacts next to the YAML.
+#
+# Late-COPY of docker-entrypoint.sh: see bindgen-base for the rationale —
+# any future entrypoint patch only invalidates this terminal layer, not the
+# multi-GB compiled-single-threaded content above.
+COPY scripts/docker-entrypoint.sh /opencascade.js/scripts/docker-entrypoint.sh
+WORKDIR /src
-RUN \
- mkdir /opencascade.js/build/ && \
- mkdir /opencascade.js/dist/ && \
- /opencascade.js/src/applyPatches.py
+ENTRYPOINT ["/opencascade.js/scripts/docker-entrypoint.sh"]
+CMD ["--help"]
-ENTRYPOINT ["/opencascade.js/src/buildFromYaml.py"]
+# ═════════════════════════════════════════════════════════════════════════════
+# Stage 4b: final-multi (published as ghcr.io/taucad/opencascade.js:multi-threaded)
+# ═════════════════════════════════════════════════════════════════════════════
+FROM compiled-multi-threaded AS final-multi
-FROM test-image AS custom-build-image
+ARG REVISION
+ARG VERSION
+ARG SOURCE_URL=https://github.com/taucad/opencascade.js
+LABEL org.opencontainers.image.title="opencascade.js (multi-threaded)" \
+ org.opencontainers.image.description="OpenCASCADE.js multi-threaded WASM build image (requires COOP/COEP on consumer pages)" \
+ org.opencontainers.image.source="${SOURCE_URL}" \
+ org.opencontainers.image.url="${SOURCE_URL}" \
+ org.opencontainers.image.revision="${REVISION}" \
+ org.opencontainers.image.version="${VERSION}" \
+ org.opencontainers.image.licenses="LGPL-2.1-only" \
+ org.opencontainers.image.vendor="taucad"
-RUN \
- /opencascade.js/src/generateBindings.py && \
- /opencascade.js/src/compileBindings.py ${threading} && \
- /opencascade.js/src/compileSources.py ${threading} && \
- chmod -R 777 /opencascade.js/ && \
- chmod -R 777 /occt
+# Late-COPY of docker-entrypoint.sh: see bindgen-base for the rationale —
+# any future entrypoint patch only invalidates this terminal layer, not the
+# multi-GB compiled-multi-threaded content above.
+COPY scripts/docker-entrypoint.sh /opencascade.js/scripts/docker-entrypoint.sh
+WORKDIR /src
-ENTRYPOINT ["/opencascade.js/src/buildFromYaml.py"]
+ENTRYPOINT ["/opencascade.js/scripts/docker-entrypoint.sh"]
+CMD ["--help"]
diff --git a/LICENSE.OCCT-Exception b/LICENSE.OCCT-Exception
new file mode 100644
index 00000000..9e7df979
--- /dev/null
+++ b/LICENSE.OCCT-Exception
@@ -0,0 +1,17 @@
+Open CASCADE exception (version 1.0) to GNU LGPL version 2.1.
+
+The object code (i.e. not a source) form of a "work that uses the Library"
+can incorporate material from a header file that is part of the Library.
+As a special exception to the GNU Lesser General Public License version 2.1,
+you may distribute such object code incorporating material from header files
+provided with the Open CASCADE Technology libraries (including code of CDL
+generic classes) under terms of your choice, provided that you give
+prominent notice in supporting documentation to this code that it makes use
+of or is based on facilities provided by the Open CASCADE Technology software.
+
+---
+
+This package, @taucad/opencascade.js, ships compiled object code derived from
+the Open CASCADE Technology libraries (https://www.opencascade.com/), used
+under the LGPL-2.1 with the Open CASCADE exception above. See LICENSE for the
+full text of the GNU Lesser General Public License, version 2.1.
diff --git a/MAINTAINER.md b/MAINTAINER.md
new file mode 100644
index 00000000..3e834490
--- /dev/null
+++ b/MAINTAINER.md
@@ -0,0 +1,162 @@
+# Maintainer Guide
+
+Build-from-source, configuration, and release workflow for `@taucad/opencascade.js`. Consumers reaching for the published tarball should start from [README.md](README.md) — this document is for fork maintainers and contributors building OCCT WASM locally.
+
+## Table of Contents
+
+- [Quick Start (Native Build)](#quick-start-native-build)
+- [Build Configuration](#build-configuration)
+ - [YAML Configs](#yaml-configs)
+ - [Configurations](#configurations)
+ - [Environment Variables](#environment-variables)
+- [Customizing Your Build](#customizing-your-build)
+- [Build Commands](#build-commands)
+- [Docker End-to-End Validation](#docker-end-to-end-validation)
+- [Additional Documentation](#additional-documentation)
+
+## Quick Start (Native Build)
+
+Prerequisites: Python 3.10+, Git, CMake, a C++ toolchain.
+
+```bash
+# 1. Clone opencascade.js
+git clone https://github.com/taucad/opencascade.js.git
+cd opencascade.js
+
+# 2. Install Emscripten SDK
+git clone https://github.com/emscripten-core/emsdk.git ../emsdk
+cd ../emsdk && ./emsdk install 5.0.1 && ./emsdk activate 5.0.1 && source ./emsdk_env.sh
+cd ../opencascade.js
+
+# 3. Clone dependencies at pinned commits
+./scripts/clone-deps.sh
+
+# 4. Install Python build dependencies
+pip install -r requirements.txt
+
+# 5. Build WASM (use nohup — full builds take 10-30+ min)
+nohup env OCJS_LTO=0 ./build-wasm.sh full build-configs/full.yml > build.log 2>&1 &
+tail -f build.log
+```
+
+> **Tip:** Full builds take 10-30+ minutes (longer with cold caches). Using `nohup` ensures the build continues if your terminal session disconnects. For link-only rebuilds (~1-2 min), `nohup` is optional.
+
+Output files appear alongside the YAML config: `opencascade_full.wasm`, `opencascade_full.js`, `opencascade_full.d.ts`.
+
+## Build Configuration
+
+### YAML Configs
+
+YAML configs define which OCCT classes are bound to JavaScript:
+
+- `build-configs/full.yml` — all symbols, single-threaded, native WASM exceptions on by default with `getExceptionMessage` runtime helpers
+
+See [docs/reference/yaml-schema.md](docs/reference/yaml-schema.md) for the full YAML schema, including `additionalCppCode`, `additionalCppFiles`, and `mainBuild.additionalBindCode`.
+
+### Configurations
+
+Named compile-time configurations live in [`build-configs/configurations.json`](build-configs/configurations.json). Apply one with `--config`:
+
+```bash
+# Production default — what the published tarball is built with: -O3, baseline SIMD,
+# BigInt, native WASM exceptions, EVAL_CTORS=2, Closure, converge, mimalloc.
+./build-wasm.sh --config single-threaded full build-configs/full.yml
+
+# Size-tuned variant: -Os compile + wasm-opt -O3, same feature set, smaller binary
+./build-wasm.sh --config single-threaded-smallest full build-configs/full.yml
+
+# Threaded variant for SAB/COOP+COEP-isolated deployments
+./build-wasm.sh --config multi-threaded full build-configs/full.yml
+
+# Debug — fastest build, -O0 compile + wasm-opt -O0, SIMD off, converge off
+./build-wasm.sh --config debug full build-configs/full.yml
+```
+
+Add your own entry to `configurations.json` to define a new configuration. See [BUILD_SYSTEM.md](BUILD_SYSTEM.md) for the full list of `OCJS_*` keys.
+
+The published npm tarball ships **both** build outputs:
+
+| Artifact prefix | Config | Subpath export |
+| -------------------------- | ----------------------------------- | -------------------------------------------------------------------- |
+| `opencascade_full.*` | `single-threaded` + `full.yml` | `@taucad/opencascade.js` / `@taucad/opencascade.js/wasm` |
+| `opencascade_full_multi.*` | `multi-threaded` + `full_multi.yml` | `@taucad/opencascade.js/multi` / `@taucad/opencascade.js/multi/wasm` |
+
+Each triple includes a matching `*.provenance.json` sidecar (`dist/opencascade_full.provenance.json` and `dist/opencascade_full_multi.provenance.json`).
+
+### npm release
+
+After `dist/` contains both ST and MT artifacts and smoke tests pass:
+
+```bash
+npm pack --dry-run # verify tarball lists all 12 dist files (6 ST + 6 MT)
+npm publish --tag rc --access public
+```
+
+Do **not** publish from a dirty tree or without both binaries present — consumers expect the MT subpath to resolve at install time.
+
+### Environment Variables
+
+Two layers of "default" matter here. The **bare default** is what `build-wasm.sh` falls back to if you set neither an env var nor a `--config`. The **shipped `full.yml` build** is what the published `@taucad/opencascade.js` tarball was actually linked with — the YAML config carries its own `emccFlags` (`-sWASM_BIGINT`, `-sEVAL_CTORS=2`, `-msimd128`) that win regardless of env var, and every named entry in [`build-configs/configurations.json`](build-configs/configurations.json) sets the corresponding `OCJS_*` envs to match.
+
+| Variable | Bare default | Shipped `full.yml` build | Description |
+| ------------------- | ----------------- | ------------------------ | -------------------------------------------------------------------------------------------------------------------- |
+| `OCJS_OPT` | `-O2` | `-O3` | Compile optimization level |
+| `OCJS_LTO` | `1` | `0` | LTO at compile time. Empirically harmful for OCCT — see [custom emcc flags guide](docs/guides/custom-emcc-flags.md). |
+| `OCJS_EXCEPTIONS` | `0` | `1` | Native WASM exceptions. Shipped build forces this on for decodable C++ exceptions. |
+| `OCJS_SIMD` | `0` | `1` | Baseline WASM SIMD (`-msimd128`). Universally supported. |
+| `OCJS_RELAXED_SIMD` | `0` | `0` | Relaxed SIMD ops on top of `OCJS_SIMD`. Safari 26.x cannot parse these — leave off for cross-browser builds. |
+| `OCJS_BIGINT` | `0` | `1` | `-sWASM_BIGINT` for native i64↔BigInt; eliminates the i64 legalization pass. |
+| `OCJS_EVAL_CTORS` | `false` | `true` | `-sEVAL_CTORS=N` static-init evaluation at compile time. |
+| `OCJS_EXTRA_CFLAGS` | _(empty)_ | _(empty)_ | Extra compile flags appended to C/CXX (e.g. `"-mllvm -inline-threshold=128"`). |
+| `OCJS_DEFINES` | _(empty)_ | `OCCT_NO_DUMP` | Comma-separated list of `-D` macros. |
+| `OCJS_UNDEFINES` | _(empty)_ | `OCC_CONVERT_SIGNALS` | Comma-separated list of `-U` undefines. |
+| `THREADING` | `single-threaded` | `single-threaded` | Threading mode (`single-threaded` or `multi-threaded`). |
+
+The bare-default column is only relevant if you invoke `build-wasm.sh` without `--config` _and_ without `OCJS_CONFIG` — the script's own fallback selects the `single-threaded` configuration when both are unset, so in practice you always get the rightmost column unless you go out of your way to disable it.
+
+## Customizing Your Build
+
+Create a custom YAML config with only the symbols your application needs:
+
+1. Copy `build-configs/full.yml` as a starting point
+2. Remove symbols you don't use from `bindings`
+3. (Most cases) handle typedefs for NCollection and `Handle` types are auto-discovered, so manual `additionalCppCode` edits are usually unnecessary. Edit only when you hit a missing-handle linker error.
+4. Validate: `./build-wasm.sh validate build-configs/my-config.yml`
+5. Build: `./build-wasm.sh link build-configs/my-config.yml`
+
+Fewer symbols = smaller WASM binary. Each symbol adds ~15-25 KB.
+
+## Build Commands
+
+```bash
+# Full build — always use nohup (10-30+ min)
+nohup env ./build-wasm.sh full > build.log 2>&1 &
+
+./build-wasm.sh link # Link only (fastest, reuses .o files)
+./build-wasm.sh validate # Validate config without building
+./build-wasm.sh cache-list # List cached compilations
+./build-wasm.sh cache-gc [n] # Clean old cache entries
+./build-wasm.sh --help # Full usage information
+```
+
+## Docker End-to-End Validation
+
+`scripts/docker-e2e-validate.sh` builds the image, links a consumer YAML, asserts byte-size delta versus a locally-built baseline, and runs a JS smoke test. Driven via Nx:
+
+```bash
+pnpm nx run ocjs:docker-e2e
+```
+
+The script verifies image build success, consumer link, wasm byte-size delta against a local baseline, and a JS-side smoke test.
+
+## Additional Documentation
+
+- [BREAKING_CHANGES.md](BREAKING_CHANGES.md) — consumer migration guide
+- [CHANGELOG.md](CHANGELOG.md) — release notes
+- [BUILD_SYSTEM.md](BUILD_SYSTEM.md) — full `OCJS_*` env-var matrix and configuration authoring
+- [docs/reference/yaml-schema.md](docs/reference/yaml-schema.md) — YAML schema reference
+- [docs/guides/custom-emcc-flags.md](docs/guides/custom-emcc-flags.md) — tuning size, speed, and build time
+- [docs/guides/trim-symbols.md](docs/guides/trim-symbols.md) — trim from `full.yml` to a consumer-sized build
+- [docs/guides/extend-with-cpp.md](docs/guides/extend-with-cpp.md) — add wrappers via `additionalCppCode` / `additionalCppFiles` / `additionalBindCode`
+- [docs/guides/reproducible-ci.md](docs/guides/reproducible-ci.md) — pin-by-SHA, `provenance.json`, SBOM, lockfile discipline
+- [TODO.md](TODO.md) — contributor backlog
diff --git a/README.md b/README.md
index 895c6446..835452ee 100644
--- a/README.md
+++ b/README.md
@@ -1,10 +1,7 @@
-[](https://github.com/donalffons/opencascade.js/actions/workflows/buildFull.yml)
-
-
-
OpenCascade.js
+ opencascade.js
A port of the OpenCascade CAD library to JavaScript and WebAssembly via Emscripten.
@@ -12,22 +9,194 @@
Explore the docs »
- Examples
- ·
- Issues
+ Issues
·
- Discuss
+ Discuss
-# Projects & Examples:
+
+
+
+
+
+## Choose Your Path
+
+| I want to… | Go to |
+| ---------------------------------------------------------- | ----------------------------------------------------------------------------------------- |
+| **Use OCCT from JS or TS** (npm install, ESM `init`) | [Quickstart (npm)](#quickstart-npm) |
+| **Run a reproducible build** (CI, Docker, custom YAML) | [Quickstart (Docker)](#quickstart-docker) |
+| **See what changed in v3** (OCCT V8, ESM-only, exceptions) | [What's New in v3](#whats-new-in-v3) · [BREAKING_CHANGES.md](BREAKING_CHANGES.md) |
+| **Customize the binding set** (trim YAML, add wrappers) | [docs/reference/yaml-schema.md](docs/reference/yaml-schema.md) |
+| **Build OCCT WASM from source** (fork maintainers) | [MAINTAINER.md](MAINTAINER.md) |
+| **Contribute or report an issue** | [Contributing](#contributing) · [Issues](https://github.com/taucad/opencascade.js/issues) |
+
+## Table of Contents
+
+- [Choose Your Path](#choose-your-path)
+- [Table of Contents](#table-of-contents)
+- [Quickstart (npm)](#quickstart-npm)
+ - [Multi-threaded build](#multi-threaded-build)
+- [Quickstart (Docker)](#quickstart-docker)
+- [Tags](#tags)
+- [What's New in v3](#whats-new-in-v3)
+- [Documentation](#documentation)
+- [Projects Using opencascade.js](#projects-using-opencascadejs)
+- [Contributing](#contributing)
+- [License](#license)
+
+## Quickstart (npm)
+
+> Upgrading from v2? See **[BREAKING_CHANGES.md](BREAKING_CHANGES.md)** for the v3 migration guide (package rename, ESM-only loading, exception decode pattern, OCCT V8 API).
+
+```bash
+pnpm add @taucad/opencascade.js@beta
+# or: npm install @taucad/opencascade.js@beta
+```
+
+The package is ESM-only with a default-export `init` function. Pass `locateFile` so the Emscripten loader can resolve the wasm binary from your bundler's output (browser) or `node_modules` layout (Node). Both runtimes reach the binary through the `@taucad/opencascade.js/wasm` subpath export — no `dist/...` deep imports required.
+
+```ts
+// Node
+import { fileURLToPath } from 'node:url';
+import { dirname, join } from 'node:path';
+import init from '@taucad/opencascade.js';
+
+const WASM_DIR = dirname(fileURLToPath(import.meta.resolve('@taucad/opencascade.js/wasm')));
+
+const oc = await init({
+ locateFile: (filename: string) => join(WASM_DIR, filename),
+});
+
+using box = new oc.BRepPrimAPI_MakeBox(10, 10, 10);
+const shape = box.Shape();
+```
+
+```ts
+// Vite / browser
+import init from '@taucad/opencascade.js';
+import wasmUrl from '@taucad/opencascade.js/wasm?url';
+
+const oc = await init({ locateFile: () => wasmUrl });
+```
+
+The published tarball ships pre-built WASM at `dist/opencascade_full.{wasm,js,d.ts}` (single-threaded default) and `dist/opencascade_full_multi.{wasm,js,d.ts}` (multi-threaded opt-in), each with a `provenance.json` sidecar describing the exact toolchain and source commits used.
+
+### Multi-threaded build
+
+For batch meshing, boolean grids, and STEP→glTF pipelines that benefit from OCCT's internal thread pool, import the pthread-enabled variant instead of the default:
+
+```ts
+// Node
+import { fileURLToPath } from 'node:url';
+import { dirname, join } from 'node:path';
+import init from '@taucad/opencascade.js/multi';
+
+const WASM_DIR = dirname(fileURLToPath(import.meta.resolve('@taucad/opencascade.js/multi/wasm')));
+
+const oc = await init({
+ locateFile: (filename: string) => join(WASM_DIR, filename),
+});
+
+// Run once after init — flip OCCT global parallel defaults and size the thread pool.
+oc.BOPAlgo_Options.SetParallelMode(true); // booleans fan out by default
+oc.BRepMesh_IncrementalMesh.SetParallelDefault(true); // meshing fan out by default
+const pool = oc.OSD_ThreadPool.DefaultPool(-1); // lazy-init pool to NbLogicalProcessors
+pool.SetNbDefaultThreadsToLaunch(pool.NbThreads()); // let each call use all workers
+```
+
+```ts
+// Vite / browser (requires COOP/COEP headers — see docs)
+import init from '@taucad/opencascade.js/multi';
+import wasmUrl from '@taucad/opencascade.js/multi/wasm?url';
+
+const oc = await init({ locateFile: () => wasmUrl });
+
+oc.BOPAlgo_Options.SetParallelMode(true);
+oc.BRepMesh_IncrementalMesh.SetParallelDefault(true);
+using pool = oc.OSD_ThreadPool.DefaultPool(-1);
+pool.SetNbDefaultThreadsToLaunch(pool.NbThreads());
+```
+
+Browsers require `Cross-Origin-Opener-Policy: same-origin` and `Cross-Origin-Embedder-Policy: require-corp` on every page that loads the threaded wasm. See the [multi-threaded build guide](https://ocjs.org/docs/package/guides/multi-threading) for activation, benchmarks, and when not to ship threaded; [toolchain custom-build](https://ocjs.org/docs/toolchain/guides/multi-threading) covers the YAML recipe for trimmed MT variants.
+
+## Quickstart (Docker)
+
+Pre-built images are published to [ghcr.io/taucad/opencascade.js](https://github.com/taucad/opencascade.js/pkgs/container/opencascade.js):
+
+- **Release tags** (`v*`) publish multi-arch manifest lists (`linux/amd64` + `linux/arm64`).
+- **Branch pushes** publish `linux/amd64`-only images for fast smoke iteration.
+
+No local build required.
+
+```bash
+docker pull ghcr.io/taucad/opencascade.js:single-threaded
+
+# Single-mount Quickstart — outputs land next to your YAML
+docker run --rm \
+ -v "$(pwd):/src" \
+ -u "$(id -u):$(id -g)" \
+ ghcr.io/taucad/opencascade.js:single-threaded link my-config.yml
+```
+
+For cached iterative builds (link-only reruns in ≤ 5 min), see the named-volume recipe in [MAINTAINER.md](MAINTAINER.md#docker-end-to-end-validation). Apple Silicon runs natively from the manifest list — no `--platform` flag required.
+
+The entrypoint dispatches subcommands (`link`, `compile-bindings`, `compile-sources`, `pch`, `generate`, `apply-patches`) through `npx nx run ocjs:`. `link` is the end-to-end command — Nx's `dependsOn` graph pulls every upstream step with cache reuse, so a fresh container performs a full build and cached re-runs replay only the link. Use `docker run … --help` for the complete reference, or `docker run … nx ` as an escape hatch into raw Nx.
+
+## Tags
+
+| Tag | What it points at |
+| ------------------------------- | ---------------------------------------------------------------------------------- |
+| `:single-threaded` | Latest release, single-threaded warm cache (default for browser CAD UIs) |
+| `:multi-threaded` | Latest release, multi-threaded warm cache (requires COOP/COEP) |
+| `:bindgen-base` | Latest release, post-PCH/generate but pre-compile (custom-bindings starting point) |
+| `:-single-threaded` | Pinned release, single-threaded (e.g. `:3.0.0-single-threaded`) |
+| `:-multi-threaded` | Pinned release, multi-threaded |
+| `:-bindgen-base` | Pinned release, bindgen-base |
+| `:branch-` | Branch tip, single-threaded (amd64-only, ephemeral — 7-day GHCR retention) |
+| `:multi-threaded-branch-` | Branch tip, multi-threaded (amd64-only, ephemeral) |
+| `:bindgen-base-branch-` | Branch tip, bindgen-base (amd64-only, ephemeral) |
+
+On release tags, Docker resolves the right architecture from the manifest list automatically — no `--platform` flag is needed on either `linux/amd64` or `linux/arm64` hosts.
+
+## What's New in v3
+
+- **OCCT 8.0.0** — 1,085 commits of improvements; 22-31% faster boolean operations
+- **Emscripten 5.0.1** — LLVM 17, modern WASM features
+- **Native WASM Exceptions** — `-fwasm-exceptions` replaces JS invoke trampolines; decodable end-to-end via `getExceptionMessage`
+- **ESM-only distribution** — `"type": "module"`; default export is single-threaded `opencascade_full.{js,wasm,d.ts}`; multi-threaded `opencascade_full_multi.{js,wasm,d.ts}` ships under `@taucad/opencascade.js/multi` and `/multi/wasm`
+- **Full TypeScript bindings** — Doxygen-derived JSDoc rendered correctly in Monaco IntelliSense
+- **Suffix-free overloads** — single symbol per class with val-based dispatcher, no more `_2`/`_3` subclasses (measured at ~264 ns/call, <0.011% of wall time on typical CAD models — see [BENCHMARKS.md](BENCHMARKS.md))
+- **Reproducible builds** — `DEPS.json` pins every dependency to an exact commit; per-build `provenance.json` sidecar
+- **Cached, incremental builds** — content-addressed compilation cache turns 10-30 minute clean builds into seconds on hit
+
+See [CHANGELOG.md](CHANGELOG.md) for the full v3.0.0 entry. For empirical evidence of every measurable fork change (wall-clock CAD perf vs native C++, multi-threading speedup, embind dispatch cost, RBV overhead), see **[BENCHMARKS.md](BENCHMARKS.md)**.
+
+## Documentation
+
+- [BREAKING_CHANGES.md](BREAKING_CHANGES.md) — v3 consumer migration guide
+- [CHANGELOG.md](CHANGELOG.md) — release notes
+- **[BENCHMARKS.md](BENCHMARKS.md)** — empirical evidence hub: wall-clock CAD perf vs native C++, multi-threading speedup, embind dispatch cost, RBV overhead
+- [MAINTAINER.md](MAINTAINER.md) — native build, env vars, customization for fork maintainers
+- [docs/reference/yaml-schema.md](docs/reference/yaml-schema.md) — YAML schema (bindings, emccFlags, additionalCppCode, additionalCppFiles, additionalBindCode)
+- [BUILD_SYSTEM.md](BUILD_SYSTEM.md) — `OCJS_*` env-var matrix and configuration authoring
+- [docs/guides/custom-emcc-flags.md](docs/guides/custom-emcc-flags.md) — tuning size, speed, and build time
+- [docs/guides/trim-symbols.md](docs/guides/trim-symbols.md) — trim from `full.yml` to a consumer-sized build
+- [docs/guides/extend-with-cpp.md](docs/guides/extend-with-cpp.md) — add wrappers via `additionalCppCode` / `additionalCppFiles` / `additionalBindCode`
+- [docs/guides/reproducible-ci.md](docs/guides/reproducible-ci.md) — pin-by-SHA, `provenance.json`, SBOM, lockfile discipline
+
+## Projects Using opencascade.js
+
+- [ArchiYou](https://archiyou.com/) — Library, Code-CAD Design Tool, Community Hub
+- [BitByBit](https://bitbybit.dev/) — Code- & node-based CAD Design Tool
+- [CascadeStudio](https://github.com/zalo/CascadeStudio) — Library and Code-CAD Design Tool
+- [RepliCAD](https://replicad.xyz/) — Library and Code-CAD Design Tool
+- [Tau](https://tau.new/) — AI-native CAD platform for the web
+
+## Contributing
-* [ArchiYou](https://archiyou.com/): Library, Code-CAD Design Tool, Community Hub
-* [BitByBit](https://bitbybit.dev/): Code- & node-based - CAD Design Tool
-* [CascadeStudio](https://github.com/zalo/CascadeStudio): Library and Code-CAD Design Tool
-* [RepliCAD](https://replicad.xyz/): Library and Code-CAD Design Tool
-* [OpenCascade.js-examples](https://github.com/donalffons/opencascade.js-examples): Contains general examples on how to use the library.
+Contributions are welcome! See [TODO.md](TODO.md) for the current backlog and [MAINTAINER.md](MAINTAINER.md) for build-from-source instructions.
-# Contributing
+## License
-Contributions are welcome! Feel free to have a look at the [todo-list](TODO.md) if you need some inspiration on what else needs to be done.
+See [LICENSE](LICENSE).
diff --git a/TODO.md b/TODO.md
index 82c88f66..be17f881 100644
--- a/TODO.md
+++ b/TODO.md
@@ -1,42 +1,47 @@
-# OpenCascade.js To-Do's
+# opencascade.js — backlog (v3)
-## 1. AdditionalCppCode
+An honest, public backlog. Items here are either next-cut work or known investigations that have not yet landed. Closed items live in [`CHANGELOG.md`](CHANGELOG.md). Test failures and bugs go to GitHub issues, not here.
-* not specifying additionalCppCode should give you the default tools from opencascade.full.yml
+## Bindgen
-## 2. Improve Bindings
+- **Regex / glob support in YAML `bindings`**: today, every entry must be a literal `- symbol: ClassName`. Adding `- pattern: ^STEPControl_.*$` would compress hand-trimmed YAML files and reduce drift between consumer YAML and OCCT releases.
+- **Trailing-default parity for C-string-wrapper methods**: the trailing-default → optional-arg parity that landed for plain methods (e.g. `BRepOffsetAPI_ThruSections::Build`) is gated off for the C-string wrapper path. Methods like `IFSelect_Act::SetGroup(group, file = "")` still require explicit `file=""` from JS. ~30 OCCT methods are affected; folding the truncation loop into the C-string-wrapper emit in `Bindings.processMethodOrProperty` (the `hasCStringArgs` / `returnIsCString` branch around `bindings.py:1463`) would close the gap. The TS gate in `TypescriptBindings.processMethodOrProperty` must stay coherent with whatever the embind side accepts.
+- **Trailing-default parity for multi-overload methods**: same gap, gated by `numOverloads == 1`. When a class has multiple same-named overloads and one carries trailing defaults, the truncation has to be registered alongside the existing `select_overload<>` entries without colliding with the `_emitValDispatchMethod` arity-tree. Mechanical extension; needs collision testing against the val-dispatch path in `bindings.py`.
+- **Trailing-default parity for return-by-value-wrapper methods**: methods whose return type triggers `_returnTypeRequiresValueWrapper` already emit a custom `optional_override` lambda; that lambda would need its own truncation loop to fan out arities. Not on the critical path for the original `Build()` smoking gun but worth folding in once (1) and (2) above land so the four method-emit gates collapse into a single shared truncation helper.
+- **Single source of truth for the trailing-default eligibility gate**: TS (`TypescriptBindings.processMethodOrProperty`) and embind (`Bindings.processMethodOrProperty`) currently duplicate the predicate set (`numOverloads == 1`, `not hasOutputParams`, `not hasCStringArgs`, `not returnIsCString`, `not _returnTypeRequiresValueWrapper`). Extract into a shared helper (e.g. `_methodTrailingDefaultsEligible(method, args)`) so future tightenings/relaxations cannot drift between surfaces and silently emit `?`-marked TS args without a matching embind binding (the asymmetric-trap class of bug discovered during the PoC).
+- **`std::optional` as a return type (Gate-5)**: bindgen consumes `std::optional` only as a _parameter_ wrapper today (matrix rows {3, 4, 5, 21, 22}); it never emits it as a _return_ type. A method whose C++ signature is `std::optional foo(...)` should map `std::optional(v) → v` and `std::nullopt → undefined` on the JS side, with the `.d.ts` rendering the return as `T | undefined`. Work: (1) detect an `std::optional` return in the embind emit path and route it through `register_optional::fromWireType` (the wire converter already round-trips both directions — confirmed by the PoC's `t3_maybe_value` in `experiments/poc-occt-integration/t1-t4.test.mjs`); (2) teach the `.d.ts` return-type renderer to unwrap `std::optional` to `T | undefined` (mirror of the param-side `T?` handling); (3) flip `OPTIONAL_RETURN_AVAILABLE = true` and write the real bodies in `tests/smoke/smoke-optional-return-types.test.ts` (3 activation-gate pins are already authored and skipped against this flag). Cross-check the strict-null discipline: a returned `nullopt` collapses to `undefined` (not `null`), keeping the surface consistent with rule 5's `undefined`-means-absence convention. Deferred to Gate 5 per `docs/research/ocjs-optional-overload-resolution-blueprint.md` ("Open Items Deferred to Gate 5"); no production OCCT signature is blocked on it yet, so it can land opportunistically once a real `std::optional`-returning surface is in scope.
+- **`register_optional` for enum/class inner types (P1)**: `register_optional` ships only for `bool` (203 sites), `handle` (102), `handle` (2), `int` (1), `TDF_HAllocator` (1) — and zero enum/class/`double` inner types. Any genuine `std::optional` parameter therefore reaches an unbound type at runtime and the full-arity ctor/method throws `Cannot construct … due to unbound types`. Bound public casualties (per `docs/research/ocjs-register-optional-enum-class-gap.md`): `BRepGraph_ParentExplorer` / `BRepGraph_ChildExplorer` (inner enum `BRepGraph_NodeId::Kind` — avoid-kind pruning + `Config` ctor + `GetConfig()` slice; arities 2–4 still work via arity-pad), and `Bnd_Box::Center` / `Bnd_Box2d::Center` (`optional` / `optional` — trivially recovered today via `CornerMin()`/`CornerMax()` midpoint). Fix: emit a `register_optional` for every enum/class used as a genuine `std::optional` param. Restoring all _public_ sites needs 3 inner types (`BRepGraph_NodeId::Kind`, `gp_Pnt`, `gp_Pnt2d`); ≈6 (+`double` + `math_Vector`/`math_Matrix`) also covers the internal modern-V8 math result family. Also harden `tests/smoke/smoke-genuine-optional-param.test.ts` to exercise (and fail loudly on) the full-arity enum ctor — its current 4-arg non-throw assertions route around the unbound invoker and mask the gap. Unblocks the `MIXED_DISPATCH_AVAILABLE` skipped smoke (`tests/smoke/smoke-mixed-fanout-optional.test.ts`).
+- **Generic template-typedef discovery — the "R9" durable fix (P1)**: template-typedef discovery in `discover.py` is gated on the `NCOLLECTION_CONTAINERS` allowlist, so non-NCollection instantiations (`math_VectorBase` = `math_Vector`, `BVH_Box`, `std::bitset<18>`, …) are never enumerated and never get a constructible `class_<>` binding. Consequences: the `math_Vector` family is unbound (`docs/research/ocjs-math-vector-exclusion.md`), the 4 `Approx_ComputeLine` instantiation classes (`BRepApprox_TheComputeLine*OfApprox`, `GeomInt_TheComputeLine*OfWLApprox`) are excluded, 6 `// dropped:` methods land on the `The*Of*` walking-line functors (C3 in `docs/research/ocjs-dropped-methods-audit.md`), and a large `unknown`-type tail persists (`docs/research/ocjs-bindgen-unknown-coverage-audit-v2.md` R9). Fix: refactor discovery to enroll any reachable, fully-instantiated (non-dependent) template typedef, reusing the R2 canonical-key augmentation. Highest-leverage single bindgen change for surface breadth. Risk: medium — manifest grows ~50–100 entries and may surface latent compile errors; stage generate-only first, then enable `class_<>` emit per-package as smoke tests pass.
+- **Re-bind `DE_ShapeFixParameters` + `DESTEP_Parameters` as `value_object`s (P2)**: these plain parameter structs are YAML-excluded, which drops `Get/SetShapeFixParameters` (12) and `DESTEP_Parameters` overloads (9) from `STEP`/`IGESControl_Reader/Writer` and `STEPCAFControl_*` (`docs/research/ocjs-dropped-methods-audit.md` R1). Import shape-healing / STEP-write tuning currently has no JS surface (workaround: `Interface_Static` globals). Low risk — pure data structs, no transitive deps. Land only if import-tuning becomes a product need.
+- **Expose `BOPAlgo_PaveFiller` via a factory (P2)**: abstract/no-public-ctor exclusion drops `PerformWithFiller`/`PPaveFiller`/`DSFiller` (21 methods) across `BRepAlgoAPI_{Fuse,Cut,Common,Section,Splitter,BuilderAlgo}` (`docs/research/ocjs-dropped-methods-audit.md` R3), losing the _shared pave-filler_ reuse optimisation for multi-op boolean chains. Largely redundant with the already-bound `BRepAlgoAPI_BuilderAlgo` (multi-tool path, ~5.66× faster). Medium risk — needs an `optional_override`/factory ctor; verify it links. Land only if shared-filler perf is needed.
-* Passing objects as references is not consistent with passing built-in types, right now. The fix should be fairly easy and non-breaking.
-* It is impossible to return references to built-in types, right now. Is there a way to avoid a breaking change?
-* If a function takes a c-style string as a parameter, currently we wrap this into a std::string instead, because that is compatible with Embind. However, certain APIs like STEPCAFControl_Writer::Transfer behave differently if the c-style string is a null pointer. Currently, that case cannot be covered with the current bindings.
+## Build system
-## 3. Examples and Tests
+- ~~**Provenance signing**: extend `provenance.json` with cosign signatures so downstream consumers can verify provenance without trusting GHCR's manifest list alone.~~ **Completed (R16)** — keyless cosign signing of the manifest-list digest is now part of every release publish; per-arch digests are signed for branch tags. See `cosign verify ghcr.io/taucad/opencascade.js:single-threaded …` in [docs-site](docs-site/content/docs/toolchain/reference/docker-image.mdx#cosign-signatures).
+- **Reproducible-CI guide adoption**: most downstream consumers still pin by tag rather than digest. Promote the `provenance.json` + image-digest workflow in the next release notes.
+- **Switch libclang vendoring from tarball-extract to pip wheel** (deferred from blueprint D11): the vendored LLVM 17 tree is currently 5.6 GB pre-trim → 250 MB post-trim (header-only). A `pip install libclang-headers==18.x` wheel approach would let us skip the tarball download + trim entirely. Open question: does such a wheel exist, and does it ship the `c++/v1` libc++ headers we actually consume? Worth a one-day spike before the next major image release.
+- **GHCR retention policy revisit** (deferred from blueprint D4): current policy retains release tags indefinitely and branch tags 7 days; revisit whether a 30-day or 90-day window for release tags (with a "keep the last 5 minor versions" override) would meaningfully reduce GHCR storage cost without surprising consumers who pin to older versions.
-* Allow interactive code editing on the home page
- * Either by building a simple "Playground" page using [monaco](https://microsoft.github.io/monaco-editor/)
- * Or by linking to example code using CodeSandbox / StackBlitz
-* When the above step done, we can archive the examples repository
-* Add more examples and / or tests
+## Test coverage
-## 4. Community Project Section
+- **Round-trip geometry coverage for mesh exporters**: `STEP`, `IGES`, and `BRep` smokes already write-then-read with `STEPControl_Reader` / `IGESControl_Reader` / `BRepTools` to assert geometry survives the round-trip. `GLB`, `OBJ`, `PLY`, and `STL` smokes currently stop at parsing vertex/face counts out of the serialised output; extend them to re-import through `RWGltf_CafReader` / `RWObj_CafReader` / `RWPly_PlyReader` / `RWStl_Reader` and assert geometric equality within tolerance.
+- **Per-template Playwright artifacts**: capture and archive screenshots from `starter-templates/` smokes on every CI run, not just on failure. Useful for tracking visual drift across `@react-three/drei` or `three.js` upgrades.
-* Add section about featured community projects?!
-* Ask first if the community really wants / needs that (yet) or not
+## Community
-## 5. Default values in bindings
+- **Featured community projects**: confirm the projects listed in `README.md` (`ArchiYou`, `BitByBit`, `CascadeStudio`, `RepliCAD`, `Tau`) are still active and accepting contributors; add new ones if discovered.
+- **Discussions vs Issues triage**: current convention is unclear. Document on the GitHub Discussions front page whether feature requests should land as Discussions or Issues.
-* Add support for default values
+## Upstream Contributions (Deferred — Production Stabilization First)
-## 6. More flexibility when defining custom build bindings in YAML files
+- **Improve upstream OCCT Doxygen comments to enrich generated OCJS JSDoc**: the API-reference JSDoc is derived from OCCT's in-source Doxygen `//!` comments, so classes/methods with sparse, missing, or terse Doxygen upstream produce thin or empty JSDoc (and degraded hover/`LLMs.txt`/docs-site descriptions). Many OCCT symbols carry no `@param`/`@return` prose, undocumented enum values, or single-line summaries. Work: identify the highest-traffic public surfaces with weak Doxygen (the ones consumers actually hit — e.g. `BRep*`, `Geom*`, `STEP*`, `Message_*`), author clear Doxygen comments upstream (params, returns, units, ownership/lifetime, complexity notes), and contribute them to OCCT so the next OCJS regen inherits richer JSDoc. Coordinate with the doc-generation pipeline so markdown in Doxygen (`**bold**`, lists, backticked code) round-trips into the streamdown-rendered descriptions. Defer the upstream PRs behind the same production-stabilization gate as the libembind hunks; meanwhile, OCJS-local JSDoc overrides can patch the most painful gaps without waiting on OCCT review cycles.
+- **Contribute `libembind-overloading.patch` hunks upstream to emscripten** once production OCJS use has validated stability. The four canonical hunks already satisfy the upstream-suitability constraint codified in `docs/policy/ocjs-trailing-default-emission-policy.md` rule 10 (each is a self-contained behavioural extension that preserves first-match-wins ordering and can be motivated to an upstream reviewer without invoking OCJS-specific architecture). Defer landing the upstream PR until: (1) OCJS bindgen migration through Phases 1–4 is complete; (2) replicad and other production consumers have run for ≥1 release cycle without dispatcher regressions; (3) the patch has not been modified for ≥3 months. Hunks to contribute:
+ - Hunk 1 — arity-pad in `$ensureOverloadTable` (widens the resolvable arity set when a call's `args.length` is below the smallest registered overload arity; preserves first-match-wins at the chosen arity).
+ - Hunk 2 — arity-pad in the constructor dispatcher (same mechanism as Hunk 1, applied to `_embind_register_class`'s `constructor_body[args.length]` table).
+ - Hunk 3 — optional-wildcard short-circuit in `$getSignature` (resolves `fieldType.optional === true` slots as wildcard; load-bearing for matrix rows {3, 4, 5, 21, 22}).
+ - Hunk 4 — Path B `cppTypeToJsType` primitive-priority fallback in `$getSignature` (resolves numeric typeIds locally when emcc's `-O3` minifier strips the `cppTypeToJsType` helper's primitive branches; required for `TCollection_ExtendedString(int)` vs `(double)` vs `(char)` dispatch).
+ - Tracking PR: `emscripten-core/emscripten#TBD` (file once the production-stabilization gate clears). The deferred-contribution decision and constraints are also recorded in `docs/policy/ocjs-trailing-default-emission-policy.md` §Migration Sequencing and rule 10.
-* Currently, only "symbol: bla" is supported.
-* Add support for regex
-* Maybe support for inline python functions?!
+---
-## 7. TSDoc comments in typescript definitions
-
-* Helpful in IDEs that support intellisense
-
-## 8. Other
-
-* Experiment with opencascade's built-in visualization and see if it works with Emscripten and if it's any good. Create example.
+Patches welcome on any of the above. Open a draft PR if the work might exceed a weekend so the direction can be discussed early.
diff --git a/bindgen-filters-no-deprecated.yaml b/bindgen-filters-no-deprecated.yaml
new file mode 100644
index 00000000..68a3e65a
--- /dev/null
+++ b/bindgen-filters-no-deprecated.yaml
@@ -0,0 +1,12 @@
+# Overlay: excludes deprecated OCCT symbols from binding generation.
+# Use this config instead of the base bindgen-filters.yaml to build without deprecated APIs.
+#
+# Usage:
+# python -m ocjs_bindgen --config bindgen-filters-no-deprecated.yaml
+# python -m ocjs_bindgen --no-deprecated (equivalent, uses base config)
+
+# Import base config
+extends: bindgen-filters.yaml
+
+deprecated:
+ include: false
diff --git a/bindgen-filters.yaml b/bindgen-filters.yaml
new file mode 100644
index 00000000..f4f30d41
--- /dev/null
+++ b/bindgen-filters.yaml
@@ -0,0 +1,811 @@
+# OpenCascade.js Binding Generator Filter Configuration
+# This file drives which OCCT symbols are included/excluded during binding generation.
+# Semantic rules (abstract classes, deleted constructors, etc.) remain in code.
+#
+# The bindgen filter config controls which symbols are GENERATED (binding code produced).
+# The build YAML config (e.g. custom_build_single_v8.yml) controls which symbols are LINKED.
+# A consumer overlay is simply a link-time YAML listing the symbols needed.
+
+exclude:
+ classes:
+ # Platform-specific
+ - prefix: D3DHost
+ - prefix: IVtk
+ - prefix: Cocoa
+ - prefix: AdvApp2Var
+ - prefix: BRepMeshData_
+ - prefix: BRepTest
+ - prefix: Media
+ - prefix: GeomGridEval_
+ - prefix: Geom2dGridEval_
+ - prefix: ShapePersistent_
+ # Visualization deps (AIS_ColoredShape, Graphic3d_Texture2D, TPrsStd_Driver)
+ - XCAFPrs_AISObject
+ - XCAFPrs_Driver
+ - XCAFPrs_Texture
+ # Visualization stack: classes whose implementations depend on TKOpenGl (not in WASM).
+ # Package-level exclusion already covers these, but explicit listing documents the
+ # 17 classes responsible for ~85 undefined linker symbols in full builds.
+ - AIS_ColoredShape
+ - AIS_InteractiveObject
+ - AIS_Shape
+ - Graphic3d_BSDF
+ - Graphic3d_PBRMaterial
+ - Graphic3d_Structure
+ - Graphic3d_Texture2D
+ - Graphic3d_TextureRoot
+ - Image_Texture
+ - Prs3d_Drawer
+ - Prs3d_Text
+ - PrsMgr_PresentableObject
+ - SelectMgr_SelectableObject
+ - StdPrs_ShapeTool
+ - TPrsStd_Driver
+ - TPrsStd_DriverTable
+ # Undefined symbols
+ - GCPnts_DistFunction2d
+ - GCPnts_DistFunction
+ - GeomFill_SweepSectionGenerator
+ - Geom2dGcc_FunctionTanCuCuCu
+ - CDF_DirectoryIterator
+ - Geom2dEvaluator
+ - BRepApprox_Approx
+ - BRepGProp_VinertGK
+ - BRepOffset_MakeOffset
+ - BRepOffsetAPI_FindContigousEdges
+ - BRepApprox_ResConstraintOfMyGradientbisOfTheComputeLineOfApprox
+ - BRepApprox_ResConstraintOfMyGradientOfTheComputeLineBezierOfApprox
+ - BRepFeat_MakeLinearForm
+ - TopOpeBRepBuild_Builder
+ - TopOpeBRepBuild_Builder1
+ - STEPSelections_Counter
+ - DrawDim_PlanarDimension
+ - GeomFill_NSections
+ - IntPatch_Polyhedron
+ - IntPatch_RLine
+ - Xw_Window
+ - TransferBRep
+ - HLRBRep_BSurfaceTool
+ - HLRBRep_TheCurveLocatorOfTheProjPCurOfCInter
+ - HLRBRep_ThePolyhedronOfInterCSurf
+ - HLRBRep_Surface
+ - IntCurveSurface_ThePolyhedronOfHInter
+ - IntPolyh_MaillageAffinage
+ - IGESSelect_SelectBasicGeom
+ - ShapeFix_WireSegment
+ - StepFEA_SymmetricTensor43d
+ - IFSelect_EditForm
+ - IFSelect_IntParam
+ - IFSelect_ContextModif
+ - IntTools_PntOnFace
+ - IntImpParGen_ImpTool
+ - IGESData_IGESReaderData
+ - IGESToBRep_TopoSurface
+ - StepData_FreeFormEntity
+ - StepData_UndefinedEntity
+ # Abstract / deleted / private constructors
+ - PrsDim_Dimension
+ - FSD_BinaryFile
+ - FSD_File
+ - Font_BRepFont
+ - Message_LazyProgressScope
+ - Standard_ErrorHandler
+ - BOPAlgo_PaveFiller
+ - Graphic3d_CubeMap
+ - Storage_BaseDriver
+ - AIS_Dimension
+ # OCCT V8 MathRoot::Multiple* family — internal functor structs holding
+ # `const &` fields (e.g. `const math_Vector& mySamples`). The const-ref
+ # member implicitly deletes the default constructor, and the structs are
+ # only used as ephemeral curry helpers inside the FindAllRoots template
+ # pipeline (driven through the public `MathRoot_AllRootsResult` API).
+ # Embind cannot bind a class with a deleted default ctor without a
+ # matching `.constructor<…>` declaration, and these have no exposed value
+ # constructor either. Expose `MathRoot_*` higher-level results only.
+ - MathRoot_MultipleGetValueFn
+ # OCCT LDOM (XML DOM) internal allocator-block struct: `LDOM_SBuffer`
+ # owns a singly-linked list of fixed-size buffer chunks, each chunk
+ # represented by `LDOM_SBuffer::LDOM_StringElem`. The struct uses
+ # `DEFINE_NCOLLECTION_ALLOC` which wires an `operator new` overload
+ # taking a `Handle(NCollection_BaseAllocator)` reference — Embind
+ # cannot bind a class without a default-constructible value
+ # constructor matching that signature, and the struct is only used
+ # internally as a list-node by `LDOM_SBuffer::operator<<`. The
+ # public LDOM API surface (`LDOM_OSStream`, `LDOM_SBuffer`) is
+ # already bound directly; the inner allocator block is implementation
+ # detail and excluded structurally here (the recursive class walker
+ # discovered it as a nested class once nested JS-public name encoding
+ # JS-public names instead of dropping them).
+ - LDOM_SBuffer_LDOM_StringElem
+ # OCCT V8 BRepGraph::EditorView mutation Ops — every `*Ops` inner
+ # class on `EditorView` takes a `BRepGraph_MutGuard&` value by
+ # reference (and several methods consume it by value), but
+ # `BRepGraph_MutGuard` has an explicitly deleted copy constructor
+ # (`BRepGraph_MutGuard.hxx` L128) so Embind cannot generate the
+ # marshalling layer. The mutation API is exposed end-to-end through
+ # the runtime via `BRepGraph_Editor_*` higher-level helpers; these
+ # raw-Ops bindings would only surface internal scaffolding even if
+ # they compiled. The recursive walker discovered them as nested
+ # classes, so list them here so the YAML link manifest never
+ # references them and the .cpp generator skips them.
+ - BRepGraph_EditorView_CoEdgeOps
+ - BRepGraph_EditorView_CompSolidOps
+ - BRepGraph_EditorView_CompoundOps
+ - BRepGraph_EditorView_EdgeOps
+ - BRepGraph_EditorView_FaceOps
+ - BRepGraph_EditorView_GenOps
+ - BRepGraph_EditorView_OccurrenceOps
+ - BRepGraph_EditorView_ProductOps
+ - BRepGraph_EditorView_RepOps
+ - BRepGraph_EditorView_ShellOps
+ - BRepGraph_EditorView_SolidOps
+ - BRepGraph_EditorView_VertexOps
+ - BRepGraph_EditorView_WireOps
+ # OCCT V8 Message_Messenger::StreamBuffer — RAII wrapper around an
+ # `std::ostream` reference; deleted copy/assignment, no default
+ # constructor. Embind cannot bind it. The public messenger API is
+ # exposed via `Message_Messenger::Send` overloads that take strings,
+ # not StreamBuffer instances.
+ - Message_Messenger_StreamBuffer
+ # OCCT V8 BRepGProp_Gauss::Inertia — internal struct returned by the
+ # legacy Gauss-quadrature solver; uses a `const&` reference member
+ # so the implicit default constructor is deleted. The public
+ # property-of-shape API (`BRepGProp_Vinert`, etc.) does not surface
+ # `Inertia` directly.
+ - BRepGProp_Gauss_Inertia
+ # OCCT V8 internal `Approx_ComputeLine` template instantiations — the
+ # Walking-Line surface/surface intersection (`GeomInt`) and B-Rep
+ # approximation (`BRepApprox`) helpers. Every constructor overload takes
+ # a `const math_Vector&` parameter, whose underlying type is
+ # `math_VectorBase` (mangled `15math_VectorBaseIdE`). That base
+ # is NOT bound: template-typedef discovery is gated on the
+ # `NCOLLECTION_CONTAINERS` allowlist and the generic-discovery follow-up
+ # never landed, so `math_VectorBase` is never emitted. As a
+ # result every JS call shape throws `Cannot construct ... due to unbound
+ # types` — these classes are unreachable from JS and only surface as dead
+ # `class_<>` registrations. The public capabilities they back are still
+ # exposed via higher-level APIs (`GeomInt`/`GeomAPI` surface-surface
+ # intersection; `BRepApprox`/`BRepBuilderAPI` approximation), so no
+ # modeling surface is lost. Re-include only if direct TKMath vector
+ # access (generic template-typedef discovery) ever lands.
+ - BRepApprox_TheComputeLineOfApprox
+ - BRepApprox_TheComputeLineBezierOfApprox
+ - GeomInt_TheComputeLineOfWLApprox
+ - GeomInt_TheComputeLineBezierOfWLApprox
+ # Misc compilation errors
+ - DsgPrs_RadiusPresentation
+ - Standard_Dump
+ - WNT_HIDSpaceMouse
+ - gp_VectorWithNullMagnitude
+ - BRepTest_Objects
+ - BRepGProp_Gauss
+ - BRepFeat
+ - GeomTools_UndefinedTypeHandler
+ - Interface_Graph
+ - Interface_FileReaderData
+ - Interface_GeneralModule
+ - Interface_HGraph
+ - RWHeaderSection_GeneralModule
+ - Prs3d_ToolQuadric
+ - OSD_FileNode
+ - OSD_File
+ - NCollection_ListNode
+ - NCollection_SeqNode
+ - RWStepAP214_GeneralModule
+ - RWStepShape_RWBrepWithVoids
+ - RWStepShape_RWEdgeCurve
+ - RWStepShape_RWEdgeLoop
+ - RWStepShape_RWFaceBound
+ - LocOpe_Revol
+ - QANCollection
+ - MAT2d_CutCurve
+ - LocOpe_RevolutionForm
+ - MeshTest_CheckTopology
+ - QABugs_PresentableObject
+ - QABugs
+ - QADraw
+ - MeshTest
+ - OSD_Path
+ - QADNaming
+ - Geom_HSequenceOfBSplineSurface
+ - Poly_CoherentTriPtr
+ - StepData_DefaultGeneral
+ - TDF_LabelNode
+ - StepData_GeneralModule
+ - TopClass_SolidExplorer
+ - UTL
+ - VrmlData_IndexedFaceSet
+ - VrmlData_IndexedLineSet
+ - VrmlData_Scene
+ - XBRepMesh
+ - math_NewtonMinimum
+ - math_NewtonFunctionSetRoot
+ # HLRBRep_CLProps removed: in OCCT V8 it is now a `using` alias for
+ # GeomLProp_CLPropsBase>;
+ # the F1 template-alias fix in filterTypedefs.py + processTemplate makes
+ # it bindable.
+ - HLRBRep_Intersector
+ - BOPTest_Objects
+ - BOPTest_DrawableShape
+ - BOPTest
+ - Draw_Drawable3D
+ - DBRep_DrawableShape
+ - StepKinematics_UnconstrainedPair
+ - StepKinematics_UnconstrainedPairValue
+ - StdPersistent_TopLoc
+ # OCCT V8 specific
+ - BSplCLib_CacheParams
+ - LDOM_XmlReader
+ - TDF_DerivedAttribute
+ - HLRAlgo_PolyInternalData
+ - HLRAlgo_Coincidence
+ - Poly_MakeLoops2D
+ - Poly_MakeLoops3D
+ - Handle_math_NotSquare
+ - Handle_math_SingularMatrix
+ - BSplCLib
+ - BRepMesh_Triangle
+ - BRepMesh_Delaun
+ - AIS_GraphicTool
+ - AIS_Manipulator
+ - BRepApprox_TheFunctionOfTheInt2SOfThePrmPrmSvSurfacesOfApprox
+ - BRepBlend_Walking
+ - BRepClass_FaceExplorer
+ - BRepExtrema_ProximityDistTool
+ - BRepExtrema_ProximityValueTool
+ - BRepFeat_MakeRevolutionForm
+ - BRepFill_TrimSurfaceTool
+ - BRepGProp_MeshProps
+ - BRepOffset
+ - BRepOffset_Tool
+ - BRepTopAdaptor_FClass2d
+ - DESTEP_Provider
+ - DESTL_Provider
+ - DEVRML_Provider
+ - DE_Provider
+ - DE_Wrapper
+ - GccAna_Circ2d2TanOn
+ - GccAna_Circ2d2TanRad
+ - GccAna_Circ2d3Tan
+ - GccAna_Circ2dTanCen
+ - GccAna_Circ2dTanOnRad
+ - GccAna_Lin2d2Tan
+ - GccAna_Lin2dTanObl
+ - GccAna_Lin2dTanPar
+ - GccAna_Lin2dTanPer
+ - GccEnt
+ - Geom2dGcc_Circ2d2TanOn
+ - Geom2dGcc_Circ2d2TanOnGeo
+ - Geom2dGcc_Circ2d2TanOnIter
+ - Geom2dGcc_Circ2d2TanRad
+ - Geom2dGcc_Circ2d2TanRadGeo
+ - Geom2dGcc_Circ2d3Tan
+ - Geom2dGcc_Circ2d3TanIter
+ - Geom2dGcc_Circ2dTanCen
+ - Geom2dGcc_Circ2dTanCenGeo
+ - Geom2dGcc_Circ2dTanOnRad
+ - Geom2dGcc_Circ2dTanOnRadGeo
+ - Geom2dGcc_Lin2d2Tan
+ - Geom2dGcc_Lin2d2TanIter
+ - Geom2dGcc_Lin2dTanObl
+ - Geom2dGcc_Lin2dTanOblIter
+ - Geom2dHatch_Elements
+ - GeomInt_TheFunctionOfTheInt2SOfThePrmPrmSvSurfacesOfWLApprox
+ - Graphic3d_Layer
+ - Graphic3d_SequenceOfHClipPlane
+ - Graphic3d_ShaderObject
+ - HLRBRep_Data
+ - HLRBRep_TheCSFunctionOfInterCSurf
+ - IGESData_FreeFormatEntity
+ - IGESData_ParamReader
+ - IntCurveSurface_IntersectionPoint
+ - IntImpParGen
+ - IntWalk_PWalking
+ - IntWalk_TheFunctionOfTheInt2S
+ - Interface_UndefinedContent
+ - Intf_SectionPoint
+ - LocOpe_CSIntersector
+ - LocOpe_CurveShapeIntersector
+ - PCDM_ReaderFilter
+ - Select3D_SensitiveCircle
+ - SelectMgr_SelectableObjectSet
+ - StepToTopoDS_TranslateFace
+ - TColStd_PackedMapOfInteger
+ - TopOpeBRepBuild_GIter
+ - TopOpeBRepBuild_GTopo
+ - TopOpeBRepDS_HDataStructure
+ - TopOpeBRepDS_Interference
+ - TopOpeBRepDS_TKI
+ - TopOpeBRepTool_TOOL
+ - TopOpeBRepTool_makeTransition
+ - TopOpeBRep_FacesFiller
+ - VrmlData_Node
+ - XSAlgo_ShapeProcessor
+ - Graphic3d_MaterialAspect
+ - Message
+ - Message_Messenger
+ - OSD_Protection
+ - PrsDim
+ - PrsDim_EqualDistanceRelation
+ - StepData_StepReaderData
+ - V3d
+ - STEPCAFControl_GDTProperty
+
+ # WASM-meaningless OSD / Standard / Plugin / Message / Quantity
+ - prefix: OSD_SIG
+ - prefix: OSD_Exception_
+ - OSD_Signal
+ - OSD_SignalMode
+ # NOTE: OSD_Thread, OSD_ThreadPool, OSD_Parallel are intentionally NOT excluded.
+ # They are reserved for a future THREADING=multi-threaded build per the
+ # Multi-threading reserve section of
+ - OSD_SharedLibrary
+ - OSD_LoadMode
+ - Plugin
+ - Plugin_Failure
+ - OSD_Host
+ - OSD_Process
+ - OSD_Disk
+ - OSD_OEMType
+ - OSD_SysType
+ - OSD_WhoAmI
+ - OSD_Environment
+ - OSD_PerfMeter
+ - OSD_MemInfo
+ - OSD_Chronometer
+ - OSD_Timer
+ - OSD_CachedFileSystem
+ - OSD_Directory
+ - OSD_DirectoryIterator
+ - OSD_Error
+ - OSD_Exception
+ - OSD_FileIterator
+ - OSD_FileSystem
+ - OSD_FileSystemSelector
+ - OSD_FromWhere
+ - OSD_KindFile
+ - OSD_LocalFileSystem
+ - OSD_LockType
+ - OSD_OSDError
+ - OSD_OpenMode
+ - OSD_SingleProtection
+ # NOTE: Standard_Mutex (+ nested Sentry/Sentry_1/Sentry_2) and Standard_Condition
+ # are intentionally NOT excluded — reserved for the multi-threaded build.
+ - Standard_LicenseError
+ - Standard_LicenseNotFound
+ - Standard_AbortiveTransaction
+ - Standard_ImmutableObject
+ - Standard_MMgrOpt
+ - Standard_MMgrRoot
+ - Message_PrinterSystemLog
+ - Message_ConsoleColor
+ - Quantity_Date
+ - Quantity_DateDefinitionError
+ - Quantity_Period
+ - Quantity_PeriodDefinitionError
+
+ # Dead format (VRML) orphan class. Packages handled via exclude.packages.
+ - DEVRML_ConfigurationNode
+
+ # DE format-config scaffolds (DE_Provider / DE_Wrapper already excluded)
+ - prefix: DEBREP_
+ - prefix: DEGLTF_
+ - prefix: DEIGES_
+ - prefix: DEOBJ_
+ - prefix: DEPLY_
+ - prefix: DESTEP_
+ - prefix: DEXCAF_
+ - DE_ConfigurationContext
+ - DE_ConfigurationNode
+ - DE_ShapeFixConfigurationNode
+ - DE_ShapeFixParameters
+ - DE_ValidationUtils
+
+ methods:
+ FairCurve_Batten: [Dump]
+ FairCurve_MinimalVariation: [Dump]
+ HelixGeom_BuilderApproxCurve: [ApproxParameters]
+ AppDef_MultiLine: [SetParameter]
+ BSplCLib: [DN]
+ BlendFunc: [Knots, Mults, GetShape]
+ AppDef_TheResol: [Error]
+ AppDef_ResConstraintOfTheGradient: [Error]
+ AppDef_ResConstraintOfMyGradientOfCompute: [Error]
+ AppDef_ResConstraintOfMyGradientbisOfBSplineCompute: [Error]
+ BinTools_Curve2dSet: [Dump, ReadCurve2d]
+ BinObjMgt_Persistent: [Read]
+ BinTools: [GetReal, GetShortReal, GetInteger, GetBool, GetExtChar]
+ BinTools_SurfaceSet: [ReadSurface]
+ BinTools_CurveSet: [ReadCurve]
+ BinTools_IStream: [Stream]
+ MeshVS_DataSource: [GetGeom, GetGeomType, GetGroup]
+ MeshVS_DeformedDataSource: [GetGeom, GetGeomType]
+ Interface_STAT: [Description, Phase]
+ VrmlData_Node: [Scene]
+ Font_FTFont: [GlyphImage]
+ LDOMString: [getOwnerDocument]
+ LDOM_MemManager: [Self]
+ LDOM_Node: [getOwnerDocument]
+ Aspect_VKeySet: [Mutex]
+ Image_VideoRecorder: [ChangeFrame]
+ StdPrs_BRepFont: [Mutex]
+ AdvApp2Var_Network: [ChangePatch, Patch]
+ AdvApp2Var_Framework: [IsoU, IsoV]
+ GeomPlate_PlateG0Criterion: [Value, IsSatisfied]
+ GeomPlate_PlateG1Criterion: [Value, IsSatisfied]
+ Resource_Unicode: [] # entire class methods filtered
+ OSD_Thread: [Wait]
+ TCollection_ExtendedString: [ToUTF8CString]
+ Message: [ToOSDMetric, MetricFromString]
+ OSD: [RealToCString]
+ XmlObjMgt: [GetInteger, GetReal]
+ BOPAlgo_Tools: [PerformCommonBlocks]
+ Transfer_Finder: [GetStringAttribute]
+ MoniTool_TypedValue: [Internals]
+ MoniTool_AttrList: [GetStringAttribute]
+ MoniTool_CaseData: [Text]
+ StepData_StepReaderData: [ReadEnumParam, ReadTypedParam]
+ XSControl_Vars: [] # entire class methods filtered
+ Graphic3d_GraduatedTrihedron: [CubicAxesCallback]
+ AIS_ViewController: [Keys, ChangeKeys]
+ Aspect_WindowInputListener: [Keys, ChangeKeys]
+ BRepClass3d_SolidExplorer: [GetTree, Intersector]
+ NCollection_Lerp: [Interpolate]
+ Geom2dHatch_Hatcher: [IsDone]
+ Geom2dAPI_Interpolate: [ClearTangents]
+ Geom2dGcc_Lin2dTanObl: [IsParallel2]
+ Geom2dInt_Geom2dCurveTool: [IsComposite]
+ Geom2dInt_TheCurveLocatorOfTheProjPCurOfGInter: [Locate]
+ GeomInt_IntSS: [SetTolFixTangents, TolFixTangents]
+ GeomAPI_Interpolate: [ClearTangents]
+ GeomFill_FunctionGuide: [Deriv2T]
+ GeomFill_SweepSectionGenerator: [Init]
+ GeomInt_ResConstraintOfMyGradientOfTheComputeLineBezierOfWLApprox: [Error]
+ GeomInt_ResConstraintOfMyGradientbisOfTheComputeLineOfWLApprox: [Error]
+ GeomInt_WLApprox: [Perform]
+ GeomAPI_ExtremaCurveSurface: [Extrema]
+ GeomAPI_ExtremaCurveCurve: [Extrema]
+ GeomAPI_ProjectPointOnSurf: [Extrema]
+ Select3D_SensitiveTriangulation: [LastDetectedTriangle]
+ IntTools_Context: [FClass2d, ProjPS, SolidClassifier]
+ Message_AttributeStream: [Stream]
+ OpenGl_Context: [ChangeClipping, Clipping]
+ OpenGl_GraphicDriver: [Options, ChangeOptions]
+ OpenGl_ShaderProgram: [compileShaderVerbose]
+ OpenGl_View: [SetTextureEnv, SetBackgroundTextureStyle, SetBackgroundGradient, SetBackgroundGradientType]
+ NCollection_Vec2: [cwiseAbs]
+ NCollection_Vec3: [cwiseAbs]
+ NCollection_Vec4: [cwiseAbs]
+ Graphic3d_CStructure: [IsInfinite, stick, highlight, visible, HLRValidation, IsForHighlight, IsMutable, Is2dText]
+ gp_Dir: [D]
+ gp_Dir2d: [D]
+ SelectMgr_SelectableObjectSet: [BVHSubset]
+ AIS_Manipulator: [OptionsForAttach]
+ Graphic3d_ShaderObject: [ShaderVariableList]
+ Message_ProgressScope: [NullString]
+ PCDM_ReaderFilter: [AppendMode]
+ BRepGProp_MeshProps: [BRepGProp_MeshObjType]
+ ShapeProcess: [OperationsFlags]
+ XSAlgo_ShapeProcessor: [ParameterMap]
+ Message_Messenger: [GetTraceLevel, ChangePrinters]
+ Bnd_Box: [Get, GetGap]
+ Bnd_Box2d: [Get, GetGap]
+ CSLib: [Normal, DNNormal]
+ ChFi3d: [ConcaveSide, NextSide, SameSide]
+ GeomFill: [GetShape]
+ PrsDim: [ComputeGeometry, ComputeProjEdgePresentation, ComputeProjVertexPresentation]
+ PrsDim_EqualDistanceRelation: [ComputeGeometry, ComputeProjEdgePresentation, ComputeProjVertexPresentation]
+ Quantity_Color: [Values, ColorFromName]
+ TopAbs: [Compose, Reverse]
+ V3d: [GetProjAxis]
+ Graphic3d_MaterialAspect: [MaterialName]
+ Font_FontMgr: [FindFont]
+ OSD_Protection: [User, System, Group, World]
+ TColStd_PackedMapOfInteger: [GetPackedMap]
+ STEPCAFControl_GDTProperty: [] # entire class methods filtered
+ NCollection_DataMap: [Find] # non-const lvalue reference output param
+ NCollection_IndexedDataMap: [FindFromKey] # non-const lvalue reference output param
+ # OCCT V8 NCollection_DoubleMap exposes Find1/Find2 as a const-return + bool-with-non-const-output-ref overload pair.
+ # Embind's select_overload cannot dispatch the non-const-output overload (same root cause as DataMap::Find above).
+ # Excluding both names drops both overloads; consumers should use the const-return form via operator[]/Seek instead.
+ NCollection_DoubleMap: [Find1, Find2]
+
+ # Methods excluded across ALL classes (any class containing these methods)
+ global_methods:
+ - Limits # OCCT V8: deprecated math globals, removed
+ - ReadStreamList # OCCT V8: removed API
+
+ typedefs:
+ - SelectMgr_Vec3
+ - SelectMgr_Mat4
+ - Handle_Cocoa_Window
+ - Handle_Font_BRepFont
+ - Handle_PCDM_Reader
+ - Handle_PCDM_ReadWriter_1
+ - TColQuantity_Array1OfLength
+ - TopoDS_ListOfShape
+ - Handle_Graphic3d_Structure
+ - PCDM_BaseDriverPointer
+ - Handle_Xw_Window
+ - MoniTool_ValueInterpret
+ - Interface_ValueInterpret
+ - TopOpeBRepTool_IndexedDataMapOfSolidClassifier
+ - NCollection_Utf8Iter
+ - NCollection_Utf16Iter
+ - NCollection_Utf32Iter
+ - NCollection_UtfWideIter
+ - Extrema_UBTreeFillerOfSphere
+ - Graphic3d_Mat4
+ - Graphic3d_Mat4d
+ - TObj_TIntSparseArray_VecOfData
+ - TObj_TIntSparseArray_MapOfData
+ - XCAFDimTolObjects_DatumModifiersSequence
+ - BRepBuilderAPI_BndBoxTree
+ - Extrema_UBTreeOfSphere
+ - ShapeAnalysis_BoxBndTree
+ - BRepClass3d_BndBoxTree
+ - BRepBuilderAPI_CellFilter
+ - IntSurf_Allocator
+ - TDF_HAllocator
+ - Interface_VectorOfFileParameter
+ - Handle_StepKinematics_UnconstrainedPair
+ - Handle_StepKinematics_UnconstrainedPairValue
+ - OpenGl_ListOfStructure
+ - Graphic3d_Vec2
+ - Graphic3d_Vec3
+ # OCCT V8 declares `typedef NCollection_DynamicArray VectorOfPoint;` in TWO different headers
+ # (BRepExtrema_ProximityValueTool.hxx + BRepBuilderAPI_VertexInspector.hxx), causing the bindgen to emit
+ # two `VectorOfPoint.cpp` files that both register `NCollection_DynamicArray` and produce a
+ # wasm-ld duplicate-symbol error on the embind `raw_destructor` symbol. The auto-discovery layer in
+ # ocjs_bindgen/discover.py already binds the same underlying type under the canonical mangled name
+ # `NCollection_DynamicArray_gp_XYZ`, so excluding the user-named alias loses no surface area.
+ - VectorOfPoint
+
+ template_typedefs:
+ # Handle_math_NotSquare / Handle_math_SingularMatrix / Handle_Standard_Type
+ # were previously listed here. They are now filtered structurally by
+ # `scripts/enumerate-symbols.py::collect_symbols` — any `Handle_X`
+ # template typedef whose underlying type is `opencascade::handle`
+ # where `X` is a bound class is dropped, because the class binding
+ # for `X` already emits `.smart_ptr>("Handle_X")`
+ # (in `src/bindings.py:1378`) and a duplicate `class_("Handle_X")`
+ # registration trips Embind's `BindingError: Cannot register type
+ # 'Handle_X' twice`. Triggered in OCCT V8 by Standard_Type.hxx's
+ # `DEFINE_STANDARD_HANDLE(Standard_Type, Standard_Transient)` macro,
+ # which is now exposed via libclang's `templateTypedefs`.
+ - TColStd_PackedMapOfInteger
+ - TColStd_SequenceOfAddress
+ - TopTools_IndexedDataMapOfShapeAddress
+ # HLRBRep_CLProps is `using HLRBRep_CLProps = GeomLProp_CLPropsBase<…,
+ # const HLRBRep_Curve*, …>;` — the `const T*` template argument trips
+ # the bindings.py constructor codegen which emits `const const T* &`.
+ # The class is HLR-internal (HLRBRep_Curve is not exposed to JS) so
+ # excluding it costs no public surface; the codegen fix is tracked in
+ # template-arg bug, F1 follow-up).
+ - HLRBRep_CLProps
+
+ headers:
+ - AIS_DataMapOfSelStat.hxx
+ - AIS_DataMapIteratorOfDataMapOfSelStat.hxx
+ - InterfaceGraphic.hxx
+ - Aspect_XWD.hxx
+ - IVtkDraw_Interactor.hxx
+ - BVH_IndexedBoxSet.hxx
+ - BOPDS_Iterator.hxx
+ - BOPDS_IteratorSI.hxx
+ - BOPTools_BoxTree
+ - BOPTools_BoxTree.hxx
+ - BVH_LinearBuilder.hxx
+ - BVH_RadixSorter.hxx
+ - OSD_Parallel.hxx
+ - OSD_ThreadPool.hxx
+ - Standard_Atomic.hxx
+ - MathLin_Jacobi.hxx
+ - BOPTools_Parallel.hxx
+ - BVH_DistanceField.hxx
+ - IVtk_Types.hxx
+ - IVtk_IShape.hxx
+ - IVtk_IShapeData.hxx
+ - IVtk_IShapeMesher.hxx
+ - IVtk_IShapePickerAlgo.hxx
+ - IVtkOCC_SelectableObject.hxx
+ - IVtkOCC_Shape.hxx
+ - IVtkOCC_ShapeMesher.hxx
+ - IVtkOCC_ShapePickerAlgo.hxx
+ - IVtkTools.hxx
+ - IVtkTools_DisplayModeFilter.hxx
+ - IVtkTools_ShapeDataSource.hxx
+ - IVtkTools_ShapeObject.hxx
+ - IVtkTools_ShapePicker.hxx
+ - IVtkTools_SubPolyDataFilter.hxx
+ - IVtkVTK_ShapeData.hxx
+ - IVtkVTK_View.hxx
+ - OSD_WNT.hxx
+ - WNT_Dword.hxx
+ - IVtkDraw_HighlightAndSelectionPipeline.hxx
+ - math_Householder.hxx
+
+ packages:
+ ## Module Draw (interactive testing tools, not needed in WASM)
+ - Draw
+ - TKDraw
+ - DBRep
+ - DrawTrSurf
+ - TKD3DHostTest
+ - D3DHostTest
+ - TKIVtkDraw
+ - IVtkDraw
+ - TKTopTest
+ - BOPTest
+ - BRepTest
+ - DrawFairCurve
+ - GeometryTest
+ - GeomliteTest
+ - HLRTest
+ - MeshTest
+ - SWDRAW
+ - TKViewerTest
+ - ViewerTest
+ - TKOpenGlTest
+ - OpenGlTest
+ - TKOpenGlesTest
+ - TKDCAF
+ - DDF
+ - DDataStd
+ - DDocStd
+ - DNaming
+ - DPrsStd
+ - DrawDim
+ - TKTObjDRAW
+ - TObjDRAW
+ - TKXSDRAW
+ - TKXSDRAWDE
+ - TKXSDRAWGLTF
+ - TKXSDRAWIGES
+ - TKXSDRAWOBJ
+ - TKXSDRAWPLY
+ - TKXSDRAWSTEP
+ - TKXSDRAWSTL
+ - TKXSDRAWVRML
+ - XSDRAW
+ - XSDRAWIGES
+ - XSDRAWSTEP
+ - XSDRAWSTLVRML
+ - TKQADraw
+ - QABugs
+ - QADNaming
+ - QADraw
+ - QANCollection
+ - TKXDEDRAW
+ - XDEDRAW
+ - DRAWEXE
+
+ ## Module Visualization (rendering is done in Three.js)
+ - TKD3DHost
+ - D3DHost
+ - TKIVtk
+ - IVtk
+ - IVtkOCC
+ - IVtkTools
+ - IVtkVTK
+ - TKMeshVS
+ - MeshVS
+ - TKOpenGl
+ - OpenGl
+ - TKOpenGles
+ - TKService
+ - Aspect
+ - Cocoa
+ - Font
+ - Graphic3d
+ - Image
+ - Media
+ - WNT
+ - Wasm
+ - Xw
+ - Shaders
+ - TKV3d
+ - AIS
+ - DsgPrs
+ - Prs3d
+ - PrsDim
+ - PrsMgr
+ - Select3D
+ - SelectBasics
+ - SelectMgr
+ - StdPrs
+ - StdSelect
+ - V3d
+ - TKVCAF
+ - TPrsStd
+
+ ## Data Exchange — STEP, STL, IGES, GLTF, OBJ, PLY, VRML all included
+ ## Individual problematic classes are excluded above in the classes section
+
+ ## Persistence/serialization drivers (not needed in WASM)
+ - TKBin
+ - BinDrivers
+ - BinMDataXtd
+ - BinMNaming
+ - TKBinL
+ - BinMDF
+ - BinMDataStd
+ - BinMFunction
+ - BinMDocStd
+ - BinObjMgt
+ - BinLDrivers
+ - TKBinTObj
+ - BinTObjDrivers
+ - TKBinXCAF
+ - BinXCAFDrivers
+ - BinMXCAFDoc
+ - TKStd
+ - StdDrivers
+ - StdObject
+ - StdPersistent
+ - StdStorage
+ - ShapePersistent
+ - TKStdL
+ - StdLDrivers
+ - StdLPersistent
+ - StdObjMgt
+ - TKTObj
+ - TObj
+ - TKXml
+ - XmlDrivers
+ - XmlMDataXtd
+ - XmlMNaming
+ - TKXmlL
+ - XmlLDrivers
+ - XmlMDF
+ - XmlMDataStd
+ - XmlMDocStd
+ - XmlMFunction
+ - XmlObjMgt
+ - TKXmlTObj
+ - XmlTObjDrivers
+ - TKXmlXCAF
+ - XmlXCAFDrivers
+ - XmlMXCAFDoc
+
+ ## Naming clash with BRepMesh
+ - XBRepMesh
+
+ ## Deprecated in OCCT 8 (TopOpe*), STEP header internals, approximation / plate / projection
+ ## packages pulled in transitively — excluded for WASM binary size reduction.
+ - TopOpeBRepBuild
+ - TopOpeBRepDS
+ - TopOpeBRepTool
+ - TopOpeBRep
+ - HeaderSection
+ - AppDef
+ - GeomPlate
+ - ProjLib
+
+ ## Dead format (VRML — superseded by glTF / no consumer)
+ - Vrml
+ - VrmlAPI
+ - VrmlConverter
+ - VrmlData
+
+ # Semantic rules that remain in code (not configurable):
+ # - Methods with void*, istream/ostream params (type-based)
+ # - Methods with non-const lvalue enum ref params (OCCT V8)
+ # - Copy/move constructors for classes with deleted copy/move
+ # - Using declarations (AST-based)
+ # - Bit-field properties
+ # - Unbindable nested container types (iterator, size_type, etc.)
+ # - Template arguments with empty type spelling
+ # - ::Iterator typedef patterns (memory growth issue)
+
+# ── Deprecation layer ─────────────────────────────────────────────────────
+# Symbols marked deprecated in OCCT. When deprecated.include is true (default),
+# these symbols are left alone (they may still be excluded by rules above).
+# When deprecated.include is false (or --no-deprecated is passed), every symbol
+# listed here is added to the class and global-method exclusion sets.
+deprecated:
+ include: true
+ symbols:
+ - Limits # OCCT V8: removed deprecated math globals
+ - ReadStreamList # OCCT V8: removed deprecated API
+ - OSD_Protection # OCCT V8: deprecated protection class
diff --git a/build-configs/configurations.json b/build-configs/configurations.json
new file mode 100644
index 00000000..521f23d0
--- /dev/null
+++ b/build-configs/configurations.json
@@ -0,0 +1,88 @@
+{
+ "single-threaded": {
+ "OCJS_OPT": "-O3",
+ "OCJS_LTO": "0",
+ "OCJS_EXCEPTIONS": "1",
+ "OCJS_EH_MODE": "wasm",
+ "OCJS_SIMD": "1",
+ "THREADING": "single-threaded",
+ "OCJS_DEFINES": "OCCT_NO_DUMP",
+ "OCJS_UNDEFINES": "OCC_CONVERT_SIGNALS",
+ "OCJS_WASM_OPT_LEVEL": "-O4",
+ "OCJS_CLOSURE": "true",
+ "OCJS_EVAL_CTORS": "true",
+ "OCJS_EVAL_CTORS_LEVEL": "2",
+ "OCJS_CONVERGE": "true",
+ "OCJS_BIGINT": "1",
+ "OCJS_MALLOC": "mimalloc",
+ "BINARYEN_EXTRA_PASSES": ""
+ },
+ "single-threaded-smallest": {
+ "OCJS_OPT": "-Os",
+ "OCJS_LTO": "0",
+ "OCJS_EXCEPTIONS": "1",
+ "OCJS_EH_MODE": "wasm",
+ "OCJS_SIMD": "1",
+ "THREADING": "single-threaded",
+ "OCJS_DEFINES": "OCCT_NO_DUMP",
+ "OCJS_UNDEFINES": "OCC_CONVERT_SIGNALS",
+ "OCJS_WASM_OPT_LEVEL": "-O3",
+ "OCJS_CLOSURE": "true",
+ "OCJS_EVAL_CTORS": "true",
+ "OCJS_EVAL_CTORS_LEVEL": "2",
+ "OCJS_CONVERGE": "true",
+ "OCJS_BIGINT": "1",
+ "OCJS_MALLOC": "mimalloc",
+ "BINARYEN_EXTRA_PASSES": ""
+ },
+ "multi-threaded": {
+ "OCJS_OPT": "-O3",
+ "OCJS_LTO": "0",
+ "OCJS_EXCEPTIONS": "1",
+ "OCJS_EH_MODE": "wasm",
+ "OCJS_SIMD": "1",
+ "THREADING": "multi-threaded",
+ "OCJS_DEFINES": "OCCT_NO_DUMP",
+ "OCJS_UNDEFINES": "OCC_CONVERT_SIGNALS",
+ "OCJS_WASM_OPT_LEVEL": "-O4",
+ "OCJS_CLOSURE": "true",
+ "OCJS_EVAL_CTORS": "true",
+ "OCJS_EVAL_CTORS_LEVEL": "2",
+ "OCJS_CONVERGE": "true",
+ "OCJS_BIGINT": "1",
+ "OCJS_MALLOC": "mimalloc",
+ "BINARYEN_EXTRA_PASSES": ""
+ },
+ "multi-threaded-browser": {
+ "OCJS_OPT": "-O3",
+ "OCJS_LTO": "0",
+ "OCJS_EXCEPTIONS": "1",
+ "OCJS_EH_MODE": "wasm",
+ "OCJS_SIMD": "1",
+ "THREADING": "multi-threaded",
+ "OCJS_DEFINES": "OCCT_NO_DUMP",
+ "OCJS_UNDEFINES": "OCC_CONVERT_SIGNALS",
+ "OCJS_WASM_OPT_LEVEL": "-O4",
+ "OCJS_CLOSURE": "true",
+ "OCJS_EVAL_CTORS": "true",
+ "OCJS_EVAL_CTORS_LEVEL": "2",
+ "OCJS_CONVERGE": "true",
+ "OCJS_BIGINT": "1",
+ "OCJS_MALLOC": "mimalloc",
+ "BINARYEN_EXTRA_PASSES": ""
+ },
+ "debug": {
+ "OCJS_OPT": "-O0",
+ "OCJS_LTO": "0",
+ "OCJS_EXCEPTIONS": "1",
+ "OCJS_EH_MODE": "wasm",
+ "OCJS_SIMD": "0",
+ "THREADING": "single-threaded",
+ "OCJS_WASM_OPT_LEVEL": "-O0",
+ "OCJS_CLOSURE": "true",
+ "OCJS_EVAL_CTORS": "true",
+ "OCJS_EVAL_CTORS_LEVEL": "2",
+ "OCJS_CONVERGE": "false",
+ "BINARYEN_EXTRA_PASSES": ""
+ }
+}
diff --git a/build-configs/full.yml b/build-configs/full.yml
new file mode 100644
index 00000000..4ccff403
--- /dev/null
+++ b/build-configs/full.yml
@@ -0,0 +1,4489 @@
+mainBuild:
+ name: opencascade_full.js
+ bindings:
+ - symbol: APIHeaderSection_EditHeader
+ - symbol: APIHeaderSection_MakeHeader
+ - symbol: Adaptor2d_Curve2d
+ - symbol: Adaptor2d_Line2d
+ - symbol: Adaptor2d_OffsetCurve
+ - symbol: Adaptor3d_Curve
+ - symbol: Adaptor3d_CurveOnSurface
+ - symbol: Adaptor3d_HSurfaceTool
+ - symbol: Adaptor3d_HVertex
+ - symbol: Adaptor3d_InterFunc
+ - symbol: Adaptor3d_IsoCurve
+ - symbol: Adaptor3d_Surface
+ - symbol: Adaptor3d_TopolTool
+ - symbol: AdvApprox_ApproxAFunction
+ - symbol: AdvApprox_Cutting
+ - symbol: AdvApprox_DichoCutting
+ - symbol: AdvApprox_EvaluatorFunction
+ - symbol: AdvApprox_PrefAndRec
+ - symbol: AdvApprox_PrefCutting
+ - symbol: AdvApprox_SimpleApprox
+ - symbol: AppBlend_Approx
+ - symbol: AppCont_Function
+ - symbol: AppCont_LeastSquare
+ - symbol: AppParCurves
+ - symbol: AppParCurves_Constraint
+ - symbol: AppParCurves_ConstraintCouple
+ - symbol: AppParCurves_MultiBSpCurve
+ - symbol: AppParCurves_MultiCurve
+ - symbol: AppParCurves_MultiPoint
+ - symbol: AppStdL_Application
+ - symbol: AppStd_Application
+ - symbol: ApproxInt_KnotTools
+ - symbol: ApproxInt_SvSurfaces
+ - symbol: Approx_BSplineApproxInterp
+ - symbol: Approx_Curve2d
+ - symbol: Approx_Curve3d
+ - symbol: Approx_CurveOnSurface
+ - symbol: Approx_CurvilinearParameter
+ - symbol: Approx_CurvlinFunc
+ - symbol: Approx_FitAndDivide
+ - symbol: Approx_FitAndDivide2d
+ - symbol: Approx_MCurvesToBSpCurve
+ - symbol: Approx_ParametrizationType
+ - symbol: Approx_SameParameter
+ - symbol: Approx_Status
+ - symbol: Approx_SweepApproximation
+ - symbol: Approx_SweepFunction
+ - symbol: BOPAlgo_AlertAcquiredSelfIntersection
+ - symbol: BOPAlgo_AlertBOPNotAllowed
+ - symbol: BOPAlgo_AlertBOPNotSet
+ - symbol: BOPAlgo_AlertBadPositioning
+ - symbol: BOPAlgo_AlertBuilderFailed
+ - symbol: BOPAlgo_AlertBuildingPCurveFailed
+ - symbol: BOPAlgo_AlertEmptyShape
+ - symbol: BOPAlgo_AlertFaceBuilderUnusedEdges
+ - symbol: BOPAlgo_AlertIntersectionFailed
+ - symbol: BOPAlgo_AlertIntersectionOfPairOfShapesFailed
+ - symbol: BOPAlgo_AlertMultiDimensionalArguments
+ - symbol: BOPAlgo_AlertMultipleArguments
+ - symbol: BOPAlgo_AlertNoFacesToRemove
+ - symbol: BOPAlgo_AlertNoFiller
+ - symbol: BOPAlgo_AlertNoPeriodicityRequired
+ - symbol: BOPAlgo_AlertNotSplittableEdge
+ - symbol: BOPAlgo_AlertNullInputShapes
+ - symbol: BOPAlgo_AlertPostTreatFF
+ - symbol: BOPAlgo_AlertRemovalOfIBForEdgesFailed
+ - symbol: BOPAlgo_AlertRemovalOfIBForFacesFailed
+ - symbol: BOPAlgo_AlertRemovalOfIBForMDimShapes
+ - symbol: BOPAlgo_AlertRemovalOfIBForSolidsFailed
+ - symbol: BOPAlgo_AlertRemoveFeaturesFailed
+ - symbol: BOPAlgo_AlertSelfInterferingShape
+ - symbol: BOPAlgo_AlertShapeIsNotPeriodic
+ - symbol: BOPAlgo_AlertShellSplitterFailed
+ - symbol: BOPAlgo_AlertSolidBuilderFailed
+ - symbol: BOPAlgo_AlertSolidBuilderUnusedFaces
+ - symbol: BOPAlgo_AlertTooFewArguments
+ - symbol: BOPAlgo_AlertTooSmallEdge
+ - symbol: BOPAlgo_AlertUnableToGlue
+ - symbol: BOPAlgo_AlertUnableToMakeClosedEdgeOnFace
+ - symbol: BOPAlgo_AlertUnableToMakeIdentical
+ - symbol: BOPAlgo_AlertUnableToMakePeriodic
+ - symbol: BOPAlgo_AlertUnableToOrientTheShape
+ - symbol: BOPAlgo_AlertUnableToRemoveTheFeature
+ - symbol: BOPAlgo_AlertUnableToRepeat
+ - symbol: BOPAlgo_AlertUnableToTrim
+ - symbol: BOPAlgo_AlertUnknownShape
+ - symbol: BOPAlgo_AlertUnsupportedType
+ - symbol: BOPAlgo_AlertUserBreak
+ - symbol: BOPAlgo_Algo
+ - symbol: BOPAlgo_ArgumentAnalyzer
+ - symbol: BOPAlgo_BOP
+ - symbol: BOPAlgo_Builder
+ - symbol: BOPAlgo_BuilderArea
+ - symbol: BOPAlgo_BuilderFace
+ - symbol: BOPAlgo_BuilderShape
+ - symbol: BOPAlgo_BuilderSolid
+ - symbol: BOPAlgo_CellsBuilder
+ - symbol: BOPAlgo_CheckResult
+ - symbol: BOPAlgo_CheckStatus
+ - symbol: BOPAlgo_CheckerSI
+ - symbol: BOPAlgo_EdgeInfo
+ - symbol: BOPAlgo_GlueEnum
+ - symbol: BOPAlgo_MakeConnected
+ - symbol: BOPAlgo_MakePeriodic
+ - symbol: BOPAlgo_MakePeriodic_PeriodicityParams
+ - symbol: BOPAlgo_MakerVolume
+ - symbol: BOPAlgo_Operation
+ - symbol: BOPAlgo_Options
+ - symbol: BOPAlgo_PISteps
+ - symbol: BOPAlgo_ParallelAlgo
+ - symbol: BOPAlgo_RemoveFeatures
+ - symbol: BOPAlgo_Section
+ - symbol: BOPAlgo_SectionAttribute
+ - symbol: BOPAlgo_ShellSplitter
+ - symbol: BOPAlgo_Splitter
+ - symbol: BOPAlgo_Tools
+ - symbol: BOPAlgo_ToolsProvider
+ - symbol: BOPAlgo_WireEdgeSet
+ - symbol: BOPAlgo_WireSplitter
+ - symbol: BOPDS_CommonBlock
+ - symbol: BOPDS_CoupleOfPaveBlocks
+ - symbol: BOPDS_Curve
+ - symbol: BOPDS_DS
+ - symbol: BOPDS_FaceInfo
+ - symbol: BOPDS_IndexRange
+ - symbol: BOPDS_Interf
+ - symbol: BOPDS_InterfEE
+ - symbol: BOPDS_InterfEF
+ - symbol: BOPDS_InterfEZ
+ - symbol: BOPDS_InterfFF
+ - symbol: BOPDS_InterfFZ
+ - symbol: BOPDS_InterfVE
+ - symbol: BOPDS_InterfVF
+ - symbol: BOPDS_InterfVV
+ - symbol: BOPDS_InterfVZ
+ - symbol: BOPDS_InterfZZ
+ - symbol: BOPDS_Pair
+ - symbol: BOPDS_Pave
+ - symbol: BOPDS_PaveBlock
+ - symbol: BOPDS_Point
+ - symbol: BOPDS_ShapeInfo
+ - symbol: BOPDS_SubIterator
+ - symbol: BOPDS_Tools
+ - symbol: BOPTools_AlgoTools
+ - symbol: BOPTools_AlgoTools2D
+ - symbol: BOPTools_AlgoTools3D
+ - symbol: BOPTools_ConnexityBlock
+ - symbol: BOPTools_CoupleOfShape
+ - symbol: BOPTools_Set
+ - symbol: BRepAdaptor_CompCurve
+ - symbol: BRepAdaptor_Curve
+ - symbol: BRepAdaptor_Curve2d
+ - symbol: BRepAdaptor_Surface
+ - symbol: BRepAlgo
+ - symbol: BRepAlgoAPI_Algo
+ - symbol: BRepAlgoAPI_BooleanOperation
+ - symbol: BRepAlgoAPI_BuilderAlgo
+ - symbol: BRepAlgoAPI_Check
+ - symbol: BRepAlgoAPI_Common
+ - symbol: BRepAlgoAPI_Cut
+ - symbol: BRepAlgoAPI_Defeaturing
+ - symbol: BRepAlgoAPI_Fuse
+ - symbol: BRepAlgoAPI_Section
+ - symbol: BRepAlgoAPI_Splitter
+ - symbol: BRepAlgo_AsDes
+ - symbol: BRepAlgo_FaceRestrictor
+ - symbol: BRepAlgo_Image
+ - symbol: BRepAlgo_Loop
+ - symbol: BRepAlgo_NormalProjection
+ - symbol: BRepApprox_ApproxLine
+ - symbol: BRepApprox_BSpGradient_BFGSOfMyBSplGradientOfTheComputeLineOfApprox
+ - symbol: BRepApprox_BSpParFunctionOfMyBSplGradientOfTheComputeLineOfApprox
+ - symbol: BRepApprox_BSpParLeastSquareOfMyBSplGradientOfTheComputeLineOfApprox
+ - symbol: BRepApprox_Gradient_BFGSOfMyGradientOfTheComputeLineBezierOfApprox
+ - symbol: BRepApprox_Gradient_BFGSOfMyGradientbisOfTheComputeLineOfApprox
+ - symbol: BRepApprox_MyBSplGradientOfTheComputeLineOfApprox
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+ - symbol: math_DirectPolynomialRoots
+ - symbol: math_DoubleTab
+ - symbol: math_EigenValuesSearcher
+ - symbol: math_FRPR
+ - symbol: math_Function
+ - symbol: math_FunctionAllRoots
+ - symbol: math_FunctionRoot
+ - symbol: math_FunctionRoots
+ - symbol: math_FunctionSample
+ - symbol: math_FunctionSet
+ - symbol: math_FunctionSetRoot
+ - symbol: math_FunctionSetWithDerivatives
+ - symbol: math_FunctionWithDerivative
+ - symbol: math_Gauss
+ - symbol: math_GaussLeastSquare
+ - symbol: math_GaussMultipleIntegration
+ - symbol: math_GaussSetIntegration
+ - symbol: math_GaussSingleIntegration
+ - symbol: math_GlobOptMin
+ - symbol: math_Jacobi
+ - symbol: math_KronrodSingleIntegration
+ - symbol: math_Matrix
+ - symbol: math_MultipleVarFunction
+ - symbol: math_MultipleVarFunctionWithGradient
+ - symbol: math_MultipleVarFunctionWithHessian
+ - symbol: math_NewtonFunctionRoot
+ - symbol: math_NotSquare
+ - symbol: math_PSO
+ - symbol: math_PSOParticlesPool
+ - symbol: math_Powell
+ - symbol: math_SVD
+ - symbol: math_SingularMatrix
+ - symbol: math_Status
+ - symbol: math_TrigonometricEquationFunction
+ - symbol: math_TrigonometricFunctionRoots
+ - symbol: math_Uzawa
+ - symbol: math_ValueAndWeight
+ additionalBindCode: |
+ #include
+ #include
+ #include
+ #include
+ #include
+ #include
+ #include
+ #include
+ #include
+ #include
+ #include
+ #include
+ struct TopoDS_Cast {};
+ using namespace emscripten;
+ EMSCRIPTEN_BINDINGS(ocjs_additional) {
+ function("FairCurve_Batten_Compute", optional_override([](FairCurve_Batten& self, int nbIter, double tol) -> int {
+ FairCurve_AnalysisCode code;
+ self.Compute(code, nbIter, tol);
+ return static_cast(code);
+ }));
+ function("FairCurve_MinimalVariation_Compute", optional_override([](FairCurve_MinimalVariation& self, int nbIter, double tol) -> int {
+ FairCurve_AnalysisCode code;
+ self.Compute(code, nbIter, tol);
+ return static_cast(code);
+ }));
+ class_("TopoDS_Cast")
+ .class_function("Edge", optional_override([](const TopoDS_Shape& s) -> TopoDS_Edge { return TopoDS::Edge(s); }))
+ .class_function("Wire", optional_override([](const TopoDS_Shape& s) -> TopoDS_Wire { return TopoDS::Wire(s); }))
+ .class_function("Face", optional_override([](const TopoDS_Shape& s) -> TopoDS_Face { return TopoDS::Face(s); }))
+ .class_function("Vertex", optional_override([](const TopoDS_Shape& s) -> TopoDS_Vertex { return TopoDS::Vertex(s); }))
+ .class_function("Shell", optional_override([](const TopoDS_Shape& s) -> TopoDS_Shell { return TopoDS::Shell(s); }))
+ .class_function("Solid", optional_override([](const TopoDS_Shape& s) -> TopoDS_Solid { return TopoDS::Solid(s); }))
+ .class_function("Compound", optional_override([](const TopoDS_Shape& s) -> TopoDS_Compound { return TopoDS::Compound(s); }))
+ ;
+ }
+ emccFlags:
+ - -fwasm-exceptions
+ - -sEXPORT_EXCEPTION_HANDLING_HELPERS
+ - -sEXPORT_ES6=1
+ - -sMODULARIZE
+ - -sALLOW_MEMORY_GROWTH=1
+ - -sEXPORTED_RUNTIME_METHODS=["FS"]
+ - -sINITIAL_MEMORY=128MB
+ - -sMAXIMUM_MEMORY=4GB
+ - -sUSE_FREETYPE=1
+ - -sERROR_ON_UNDEFINED_SYMBOLS=0
+ - --no-entry
+ - -Wl,--allow-undefined
+ - --emit-symbol-map
+ - -sSTACK_SIZE=8388608
+ - -sWASM_BIGINT
+ - -sEVAL_CTORS=2
+ - -msimd128
+ - -O3
diff --git a/build-configs/full_multi.yml b/build-configs/full_multi.yml
new file mode 100644
index 00000000..93d6e7a8
--- /dev/null
+++ b/build-configs/full_multi.yml
@@ -0,0 +1,4500 @@
+mainBuild:
+ name: opencascade_full_multi.js
+ bindings:
+ - symbol: APIHeaderSection_EditHeader
+ - symbol: APIHeaderSection_MakeHeader
+ - symbol: Adaptor2d_Curve2d
+ - symbol: Adaptor2d_Line2d
+ - symbol: Adaptor2d_OffsetCurve
+ - symbol: Adaptor3d_Curve
+ - symbol: Adaptor3d_CurveOnSurface
+ - symbol: Adaptor3d_HSurfaceTool
+ - symbol: Adaptor3d_HVertex
+ - symbol: Adaptor3d_InterFunc
+ - symbol: Adaptor3d_IsoCurve
+ - symbol: Adaptor3d_Surface
+ - symbol: Adaptor3d_TopolTool
+ - symbol: AdvApprox_ApproxAFunction
+ - symbol: AdvApprox_Cutting
+ - symbol: AdvApprox_DichoCutting
+ - symbol: AdvApprox_EvaluatorFunction
+ - symbol: AdvApprox_PrefAndRec
+ - symbol: AdvApprox_PrefCutting
+ - symbol: AdvApprox_SimpleApprox
+ - symbol: AppBlend_Approx
+ - symbol: AppCont_Function
+ - symbol: AppCont_LeastSquare
+ - symbol: AppParCurves
+ - symbol: AppParCurves_Constraint
+ - symbol: AppParCurves_ConstraintCouple
+ - symbol: AppParCurves_MultiBSpCurve
+ - symbol: AppParCurves_MultiCurve
+ - symbol: AppParCurves_MultiPoint
+ - symbol: AppStdL_Application
+ - symbol: AppStd_Application
+ - symbol: ApproxInt_KnotTools
+ - symbol: ApproxInt_SvSurfaces
+ - symbol: Approx_BSplineApproxInterp
+ - symbol: Approx_Curve2d
+ - symbol: Approx_Curve3d
+ - symbol: Approx_CurveOnSurface
+ - symbol: Approx_CurvilinearParameter
+ - symbol: Approx_CurvlinFunc
+ - symbol: Approx_FitAndDivide
+ - symbol: Approx_FitAndDivide2d
+ - symbol: Approx_MCurvesToBSpCurve
+ - symbol: Approx_ParametrizationType
+ - symbol: Approx_SameParameter
+ - symbol: Approx_Status
+ - symbol: Approx_SweepApproximation
+ - symbol: Approx_SweepFunction
+ - symbol: BOPAlgo_AlertAcquiredSelfIntersection
+ - symbol: BOPAlgo_AlertBOPNotAllowed
+ - symbol: BOPAlgo_AlertBOPNotSet
+ - symbol: BOPAlgo_AlertBadPositioning
+ - symbol: BOPAlgo_AlertBuilderFailed
+ - symbol: BOPAlgo_AlertBuildingPCurveFailed
+ - symbol: BOPAlgo_AlertEmptyShape
+ - symbol: BOPAlgo_AlertFaceBuilderUnusedEdges
+ - symbol: BOPAlgo_AlertIntersectionFailed
+ - symbol: BOPAlgo_AlertIntersectionOfPairOfShapesFailed
+ - symbol: BOPAlgo_AlertMultiDimensionalArguments
+ - symbol: BOPAlgo_AlertMultipleArguments
+ - symbol: BOPAlgo_AlertNoFacesToRemove
+ - symbol: BOPAlgo_AlertNoFiller
+ - symbol: BOPAlgo_AlertNoPeriodicityRequired
+ - symbol: BOPAlgo_AlertNotSplittableEdge
+ - symbol: BOPAlgo_AlertNullInputShapes
+ - symbol: BOPAlgo_AlertPostTreatFF
+ - symbol: BOPAlgo_AlertRemovalOfIBForEdgesFailed
+ - symbol: BOPAlgo_AlertRemovalOfIBForFacesFailed
+ - symbol: BOPAlgo_AlertRemovalOfIBForMDimShapes
+ - symbol: BOPAlgo_AlertRemovalOfIBForSolidsFailed
+ - symbol: BOPAlgo_AlertRemoveFeaturesFailed
+ - symbol: BOPAlgo_AlertSelfInterferingShape
+ - symbol: BOPAlgo_AlertShapeIsNotPeriodic
+ - symbol: BOPAlgo_AlertShellSplitterFailed
+ - symbol: BOPAlgo_AlertSolidBuilderFailed
+ - symbol: BOPAlgo_AlertSolidBuilderUnusedFaces
+ - symbol: BOPAlgo_AlertTooFewArguments
+ - symbol: BOPAlgo_AlertTooSmallEdge
+ - symbol: BOPAlgo_AlertUnableToGlue
+ - symbol: BOPAlgo_AlertUnableToMakeClosedEdgeOnFace
+ - symbol: BOPAlgo_AlertUnableToMakeIdentical
+ - symbol: BOPAlgo_AlertUnableToMakePeriodic
+ - symbol: BOPAlgo_AlertUnableToOrientTheShape
+ - symbol: BOPAlgo_AlertUnableToRemoveTheFeature
+ - symbol: BOPAlgo_AlertUnableToRepeat
+ - symbol: BOPAlgo_AlertUnableToTrim
+ - symbol: BOPAlgo_AlertUnknownShape
+ - symbol: BOPAlgo_AlertUnsupportedType
+ - symbol: BOPAlgo_AlertUserBreak
+ - symbol: BOPAlgo_Algo
+ - symbol: BOPAlgo_ArgumentAnalyzer
+ - symbol: BOPAlgo_BOP
+ - symbol: BOPAlgo_Builder
+ - symbol: BOPAlgo_BuilderArea
+ - symbol: BOPAlgo_BuilderFace
+ - symbol: BOPAlgo_BuilderShape
+ - symbol: BOPAlgo_BuilderSolid
+ - symbol: BOPAlgo_CellsBuilder
+ - symbol: BOPAlgo_CheckResult
+ - symbol: BOPAlgo_CheckStatus
+ - symbol: BOPAlgo_CheckerSI
+ - symbol: BOPAlgo_EdgeInfo
+ - symbol: BOPAlgo_GlueEnum
+ - symbol: BOPAlgo_MakeConnected
+ - symbol: BOPAlgo_MakePeriodic
+ - symbol: BOPAlgo_MakePeriodic_PeriodicityParams
+ - symbol: BOPAlgo_MakerVolume
+ - symbol: BOPAlgo_Operation
+ - symbol: BOPAlgo_Options
+ - symbol: BOPAlgo_PISteps
+ - symbol: BOPAlgo_ParallelAlgo
+ - symbol: BOPAlgo_RemoveFeatures
+ - symbol: BOPAlgo_Section
+ - symbol: BOPAlgo_SectionAttribute
+ - symbol: BOPAlgo_ShellSplitter
+ - symbol: BOPAlgo_Splitter
+ - symbol: BOPAlgo_Tools
+ - symbol: BOPAlgo_ToolsProvider
+ - symbol: BOPAlgo_WireEdgeSet
+ - symbol: BOPAlgo_WireSplitter
+ - symbol: BOPDS_CommonBlock
+ - symbol: BOPDS_CoupleOfPaveBlocks
+ - symbol: BOPDS_Curve
+ - symbol: BOPDS_DS
+ - symbol: BOPDS_FaceInfo
+ - symbol: BOPDS_IndexRange
+ - symbol: BOPDS_Interf
+ - symbol: BOPDS_InterfEE
+ - symbol: BOPDS_InterfEF
+ - symbol: BOPDS_InterfEZ
+ - symbol: BOPDS_InterfFF
+ - symbol: BOPDS_InterfFZ
+ - symbol: BOPDS_InterfVE
+ - symbol: BOPDS_InterfVF
+ - symbol: BOPDS_InterfVV
+ - symbol: BOPDS_InterfVZ
+ - symbol: BOPDS_InterfZZ
+ - symbol: BOPDS_Pair
+ - symbol: BOPDS_Pave
+ - symbol: BOPDS_PaveBlock
+ - symbol: BOPDS_Point
+ - symbol: BOPDS_ShapeInfo
+ - symbol: BOPDS_SubIterator
+ - symbol: BOPDS_Tools
+ - symbol: BOPTools_AlgoTools
+ - symbol: BOPTools_AlgoTools2D
+ - symbol: BOPTools_AlgoTools3D
+ - symbol: BOPTools_ConnexityBlock
+ - symbol: BOPTools_CoupleOfShape
+ - symbol: BOPTools_Set
+ - symbol: BRepAdaptor_CompCurve
+ - symbol: BRepAdaptor_Curve
+ - symbol: BRepAdaptor_Curve2d
+ - symbol: BRepAdaptor_Surface
+ - symbol: BRepAlgo
+ - symbol: BRepAlgoAPI_Algo
+ - symbol: BRepAlgoAPI_BooleanOperation
+ - symbol: BRepAlgoAPI_BuilderAlgo
+ - symbol: BRepAlgoAPI_Check
+ - symbol: BRepAlgoAPI_Common
+ - symbol: BRepAlgoAPI_Cut
+ - symbol: BRepAlgoAPI_Defeaturing
+ - symbol: BRepAlgoAPI_Fuse
+ - symbol: BRepAlgoAPI_Section
+ - symbol: BRepAlgoAPI_Splitter
+ - symbol: BRepAlgo_AsDes
+ - symbol: BRepAlgo_FaceRestrictor
+ - symbol: BRepAlgo_Image
+ - symbol: BRepAlgo_Loop
+ - symbol: BRepAlgo_NormalProjection
+ - symbol: BRepApprox_ApproxLine
+ - symbol: BRepApprox_BSpGradient_BFGSOfMyBSplGradientOfTheComputeLineOfApprox
+ - symbol: BRepApprox_BSpParFunctionOfMyBSplGradientOfTheComputeLineOfApprox
+ - symbol: BRepApprox_BSpParLeastSquareOfMyBSplGradientOfTheComputeLineOfApprox
+ - symbol: BRepApprox_Gradient_BFGSOfMyGradientOfTheComputeLineBezierOfApprox
+ - symbol: BRepApprox_Gradient_BFGSOfMyGradientbisOfTheComputeLineOfApprox
+ - symbol: BRepApprox_MyBSplGradientOfTheComputeLineOfApprox
+ - symbol: BRepApprox_MyGradientOfTheComputeLineBezierOfApprox
+ - symbol: BRepApprox_MyGradientbisOfTheComputeLineOfApprox
+ - symbol: BRepApprox_ParFunctionOfMyGradientOfTheComputeLineBezierOfApprox
+ - symbol: BRepApprox_ParFunctionOfMyGradientbisOfTheComputeLineOfApprox
+ - symbol: BRepApprox_ParLeastSquareOfMyGradientOfTheComputeLineBezierOfApprox
+ - symbol: BRepApprox_ParLeastSquareOfMyGradientbisOfTheComputeLineOfApprox
+ - symbol: BRepApprox_SurfaceTool
+ - symbol: BRepApprox_TheImpPrmSvSurfacesOfApprox
+ - symbol: BRepApprox_TheInt2SOfThePrmPrmSvSurfacesOfApprox
+ - symbol: BRepApprox_TheMultiLineOfApprox
+ - symbol: BRepApprox_TheMultiLineToolOfApprox
+ - symbol: BRepApprox_ThePrmPrmSvSurfacesOfApprox
+ - symbol: BRepApprox_TheZerImpFuncOfTheImpPrmSvSurfacesOfApprox
+ - symbol: BRepBlend_AppFunc
+ - symbol: BRepBlend_AppFuncRoot
+ - symbol: BRepBlend_AppFuncRst
+ - symbol: BRepBlend_AppFuncRstRst
+ - symbol: BRepBlend_AppSurf
+ - symbol: BRepBlend_AppSurface
+ - symbol: BRepBlend_BlendTool
+ - symbol: BRepBlend_CSWalking
+ - symbol: BRepBlend_CurvPointRadInv
+ - symbol: BRepBlend_Extremity
+ - symbol: BRepBlend_HCurve2dTool
+ - symbol: BRepBlend_HCurveTool
+ - symbol: BRepBlend_Line
+ - symbol: BRepBlend_PointOnRst
+ - symbol: BRepBlend_RstRstConstRad
+ - symbol: BRepBlend_RstRstEvolRad
+ - symbol: BRepBlend_RstRstLineBuilder
+ - symbol: BRepBlend_SurfCurvConstRadInv
+ - symbol: BRepBlend_SurfCurvEvolRadInv
+ - symbol: BRepBlend_SurfPointConstRadInv
+ - symbol: BRepBlend_SurfPointEvolRadInv
+ - symbol: BRepBlend_SurfRstConstRad
+ - symbol: BRepBlend_SurfRstEvolRad
+ - symbol: BRepBlend_SurfRstLineBuilder
+ - symbol: BRepBndLib
+ - symbol: BRepBuilderAPI
+ - symbol: BRepBuilderAPI_BndBoxTreeSelector
+ - symbol: BRepBuilderAPI_Collect
+ - symbol: BRepBuilderAPI_Command
+ - symbol: BRepBuilderAPI_Copy
+ - symbol: BRepBuilderAPI_EdgeError
+ - symbol: BRepBuilderAPI_FaceError
+ - symbol: BRepBuilderAPI_FastSewing
+ - symbol: BRepBuilderAPI_FindPlane
+ - symbol: BRepBuilderAPI_GTransform
+ - symbol: BRepBuilderAPI_MakeEdge
+ - symbol: BRepBuilderAPI_MakeEdge2d
+ - symbol: BRepBuilderAPI_MakeFace
+ - symbol: BRepBuilderAPI_MakePolygon
+ - symbol: BRepBuilderAPI_MakeShape
+ - symbol: BRepBuilderAPI_MakeShapeOnMesh
+ - symbol: BRepBuilderAPI_MakeShell
+ - symbol: BRepBuilderAPI_MakeSolid
+ - symbol: BRepBuilderAPI_MakeVertex
+ - symbol: BRepBuilderAPI_MakeWire
+ - symbol: BRepBuilderAPI_ModifyShape
+ - symbol: BRepBuilderAPI_NurbsConvert
+ - symbol: BRepBuilderAPI_PipeError
+ - symbol: BRepBuilderAPI_Sewing
+ - symbol: BRepBuilderAPI_ShapeModification
+ - symbol: BRepBuilderAPI_ShellError
+ - symbol: BRepBuilderAPI_Transform
+ - symbol: BRepBuilderAPI_TransitionMode
+ - symbol: BRepBuilderAPI_VertexInspector
+ - symbol: BRepBuilderAPI_WireError
+ - symbol: BRepCheck
+ - symbol: BRepCheck_Analyzer
+ - symbol: BRepCheck_Edge
+ - symbol: BRepCheck_Face
+ - symbol: BRepCheck_Result
+ - symbol: BRepCheck_Shell
+ - symbol: BRepCheck_Solid
+ - symbol: BRepCheck_Status
+ - symbol: BRepCheck_Vertex
+ - symbol: BRepCheck_Wire
+ - symbol: BRepClass3d
+ - symbol: BRepClass3d_BndBoxTreeSelectorLine
+ - symbol: BRepClass3d_BndBoxTreeSelectorPoint
+ - symbol: BRepClass3d_Intersector3d
+ - symbol: BRepClass3d_SClassifier
+ - symbol: BRepClass3d_SolidClassifier
+ - symbol: BRepClass3d_SolidExplorer
+ - symbol: BRepClass3d_SolidPassiveClassifier
+ - symbol: BRepClass_Edge
+ - symbol: BRepClass_FClass2dOfFClassifier
+ - symbol: BRepClass_FClassifier
+ - symbol: BRepClass_FaceClassifier
+ - symbol: BRepClass_FacePassiveClassifier
+ - symbol: BRepClass_Intersector
+ - symbol: BRepExtrema_DistShapeShape
+ - symbol: BRepExtrema_DistanceSS
+ - symbol: BRepExtrema_ElementFilter
+ - symbol: BRepExtrema_ExtCC
+ - symbol: BRepExtrema_ExtCF
+ - symbol: BRepExtrema_ExtFF
+ - symbol: BRepExtrema_ExtPC
+ - symbol: BRepExtrema_ExtPF
+ - symbol: BRepExtrema_OverlapTool
+ - symbol: BRepExtrema_Poly
+ - symbol: BRepExtrema_ProximityDistTool_PrjState
+ - symbol: BRepExtrema_SelfIntersection
+ - symbol: BRepExtrema_ShapeProximity
+ - symbol: BRepExtrema_SolutionElem
+ - symbol: BRepExtrema_SupportType
+ - symbol: BRepExtrema_TriangleSet
+ - symbol: BRepExtrema_UnCompatibleShape
+ - symbol: BRepExtrema_VertexInspector
+ - symbol: BRepFeat_Builder
+ - symbol: BRepFeat_Form
+ - symbol: BRepFeat_Gluer
+ - symbol: BRepFeat_MakeCylindricalHole
+ - symbol: BRepFeat_MakeDPrism
+ - symbol: BRepFeat_MakePipe
+ - symbol: BRepFeat_MakePrism
+ - symbol: BRepFeat_MakeRevol
+ - symbol: BRepFeat_PerfSelection
+ - symbol: BRepFeat_RibSlot
+ - symbol: BRepFeat_SplitShape
+ - symbol: BRepFeat_Status
+ - symbol: BRepFeat_StatusError
+ - symbol: BRepFill
+ - symbol: BRepFill_ACRLaw
+ - symbol: BRepFill_AdvancedEvolved
+ - symbol: BRepFill_ApproxSeewing
+ - symbol: BRepFill_CompatibleWires
+ - symbol: BRepFill_ComputeCLine
+ - symbol: BRepFill_CurveConstraint
+ - symbol: BRepFill_Draft
+ - symbol: BRepFill_DraftLaw
+ - symbol: BRepFill_Edge3DLaw
+ - symbol: BRepFill_EdgeFaceAndOrder
+ - symbol: BRepFill_EdgeOnSurfLaw
+ - symbol: BRepFill_Evolved
+ - symbol: BRepFill_FaceAndOrder
+ - symbol: BRepFill_Filling
+ - symbol: BRepFill_Generator
+ - symbol: BRepFill_LocationLaw
+ - symbol: BRepFill_MultiLine
+ - symbol: BRepFill_NSections
+ - symbol: BRepFill_OffsetAncestors
+ - symbol: BRepFill_OffsetWire
+ - symbol: BRepFill_Pipe
+ - symbol: BRepFill_PipeShell
+ - symbol: BRepFill_Section
+ - symbol: BRepFill_SectionLaw
+ - symbol: BRepFill_SectionPlacement
+ - symbol: BRepFill_ShapeLaw
+ - symbol: BRepFill_Sweep
+ - symbol: BRepFill_ThruSectionErrorStatus
+ - symbol: BRepFill_TransitionStyle
+ - symbol: BRepFill_TrimEdgeTool
+ - symbol: BRepFill_TrimShellCorner
+ - symbol: BRepFill_TypeOfContact
+ - symbol: BRepFilletAPI_LocalOperation
+ - symbol: BRepFilletAPI_MakeChamfer
+ - symbol: BRepFilletAPI_MakeFillet
+ - symbol: BRepFilletAPI_MakeFillet2d
+ - symbol: BRepGProp
+ - symbol: BRepGProp_Cinert
+ - symbol: BRepGProp_Domain
+ - symbol: BRepGProp_EdgeTool
+ - symbol: BRepGProp_Face
+ - symbol: BRepGProp_MeshCinert
+ - symbol: BRepGProp_Sinert
+ - symbol: BRepGProp_TFunction
+ - symbol: BRepGProp_UFunction
+ - symbol: BRepGProp_Vinert
+ - symbol: BRepGraph
+ - symbol: BRepGraphInc_BaseDef
+ - symbol: BRepGraphInc_BaseRef
+ - symbol: BRepGraphInc_BaseRep
+ - symbol: BRepGraphInc_ChildRef
+ - symbol: BRepGraphInc_CoEdgeDef
+ - symbol: BRepGraphInc_CoEdgeRef
+ - symbol: BRepGraphInc_CompSolidDef
+ - symbol: BRepGraphInc_CompoundDef
+ - symbol: BRepGraphInc_Curve2DRep
+ - symbol: BRepGraphInc_Curve3DRep
+ - symbol: BRepGraphInc_EdgeDef
+ - symbol: BRepGraphInc_FaceDef
+ - symbol: BRepGraphInc_FaceRef
+ - symbol: BRepGraphInc_OccurrenceDef
+ - symbol: BRepGraphInc_OccurrenceRef
+ - symbol: BRepGraphInc_Polygon2DRep
+ - symbol: BRepGraphInc_Polygon3DRep
+ - symbol: BRepGraphInc_PolygonOnTriRep
+ - symbol: BRepGraphInc_Populate
+ - symbol: BRepGraphInc_ProductDef
+ - symbol: BRepGraphInc_Reconstruct
+ - symbol: BRepGraphInc_Reconstruct_Cache
+ - symbol: BRepGraphInc_Reconstruct_Cache_TempScope
+ - symbol: BRepGraphInc_ReverseIndex
+ - symbol: BRepGraphInc_ShellDef
+ - symbol: BRepGraphInc_ShellRef
+ - symbol: BRepGraphInc_SolidDef
+ - symbol: BRepGraphInc_SolidRef
+ - symbol: BRepGraphInc_Storage
+ - symbol: BRepGraphInc_SurfaceRep
+ - symbol: BRepGraphInc_TriangulationRep
+ - symbol: BRepGraphInc_VertexDef
+ - symbol: BRepGraphInc_VertexRef
+ - symbol: BRepGraphInc_WireDef
+ - symbol: BRepGraphInc_WireInstance
+ - symbol: BRepGraphInc_WireRef
+ - symbol: BRepGraph_Builder
+ - symbol: BRepGraph_CacheKind
+ - symbol: BRepGraph_CacheKindRegistry
+ - symbol: BRepGraph_CacheValue
+ - symbol: BRepGraph_CacheView
+ - symbol: BRepGraph_ChildExplorer
+ - symbol: BRepGraph_ChildRefId
+ - symbol: BRepGraph_CoEdgeId
+ - symbol: BRepGraph_CoEdgeRefId
+ - symbol: BRepGraph_CoEdgesOfEdge
+ - symbol: BRepGraph_CompSolidId
+ - symbol: BRepGraph_CompSolidsOfSolid
+ - symbol: BRepGraph_Compact
+ - symbol: BRepGraph_CompoundId
+ - symbol: BRepGraph_CompoundsOfCompSolid
+ - symbol: BRepGraph_Copy
+ - symbol: BRepGraph_Curve2DRepId
+ - symbol: BRepGraph_Curve3DRepId
+ - symbol: BRepGraph_Data
+ - symbol: BRepGraph_Deduplicate
+ - symbol: BRepGraph_DeferredScope
+ - symbol: BRepGraph_DefsChildOfCompound
+ - symbol: BRepGraph_DefsChildOfShell
+ - symbol: BRepGraph_DefsChildOfSolid
+ - symbol: BRepGraph_DefsCoEdgeOfWire
+ - symbol: BRepGraph_DefsEdgeOfWire
+ - symbol: BRepGraph_DefsFaceOfShell
+ - symbol: BRepGraph_DefsIterator_ChildOfCompoundTraits
+ - symbol: BRepGraph_DefsIterator_ChildOfShellTraits
+ - symbol: BRepGraph_DefsIterator_ChildOfSolidTraits
+ - symbol: BRepGraph_DefsIterator_CoEdgeOfWireTraits
+ - symbol: BRepGraph_DefsIterator_DefsVertexOfEdge
+ - symbol: BRepGraph_DefsIterator_EdgeOfWireTraits
+ - symbol: BRepGraph_DefsIterator_FaceOfShellTraits
+ - symbol: BRepGraph_DefsIterator_OccurrenceOfProductTraits
+ - symbol: BRepGraph_DefsIterator_ShellOfSolidTraits
+ - symbol: BRepGraph_DefsIterator_SolidOfCompSolidTraits
+ - symbol: BRepGraph_DefsIterator_VertexOfFaceTraits
+ - symbol: BRepGraph_DefsIterator_WireOfFaceTraits
+ - symbol: BRepGraph_DefsOccurrenceOfProduct
+ - symbol: BRepGraph_DefsShellOfSolid
+ - symbol: BRepGraph_DefsSolidOfCompSolid
+ - symbol: BRepGraph_DefsVertexOfFace
+ - symbol: BRepGraph_DefsWireOfFace
+ - symbol: BRepGraph_EdgeId
+ - symbol: BRepGraph_EdgesOfVertex
+ - symbol: BRepGraph_EditorView
+ - symbol: BRepGraph_FaceId
+ - symbol: BRepGraph_FaceRefId
+ - symbol: BRepGraph_FacesOfEdge
+ - symbol: BRepGraph_FullChildRefIterator
+ - symbol: BRepGraph_FullCoEdgeRefIterator
+ - symbol: BRepGraph_FullFaceRefIterator
+ - symbol: BRepGraph_FullOccurrenceRefIterator
+ - symbol: BRepGraph_FullShellRefIterator
+ - symbol: BRepGraph_FullSolidRefIterator
+ - symbol: BRepGraph_FullVertexRefIterator
+ - symbol: BRepGraph_FullWireRefIterator
+ - symbol: BRepGraph_History
+ - symbol: BRepGraph_HistoryRecord
+ - symbol: BRepGraph_Layer
+ - symbol: BRepGraph_LayerIterator
+ - symbol: BRepGraph_LayerParam
+ - symbol: BRepGraph_LayerParam_VertexParams
+ - symbol: BRepGraph_LayerRegistry
+ - symbol: BRepGraph_LayerRegularity
+ - symbol: BRepGraph_LayerRegularity_EdgeRegularities
+ - symbol: BRepGraph_MeshCacheStorage
+ - symbol: BRepGraph_MeshCache_CoEdgeMeshEntry
+ - symbol: BRepGraph_MeshCache_EdgeMeshEntry
+ - symbol: BRepGraph_MeshCache_FaceMeshEntry
+ - symbol: BRepGraph_MeshView
+ - symbol: BRepGraph_MeshView_CoEdgeOps
+ - symbol: BRepGraph_MeshView_EdgeOps
+ - symbol: BRepGraph_MeshView_FaceOps
+ - symbol: BRepGraph_MeshView_PolyOps
+ - symbol: BRepGraph_NodeId
+ - symbol: BRepGraph_OccurrenceId
+ - symbol: BRepGraph_OccurrenceRefId
+ - symbol: BRepGraph_OccurrencesOfProduct
+ - symbol: BRepGraph_ParallelPolicy
+ - symbol: BRepGraph_ParentExplorer
+ - symbol: BRepGraph_Polygon2DRepId
+ - symbol: BRepGraph_Polygon3DRepId
+ - symbol: BRepGraph_PolygonOnTriRepId
+ - symbol: BRepGraph_ProductId
+ - symbol: BRepGraph_RefId
+ - symbol: BRepGraph_RefTransientCache
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+ - symbol: BRepGraph_RefsIterator_RefsVertexOfEdge
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+ - symbol: BRepGraph_RefsIterator_SolidOfCompSolidTraits
+ - symbol: BRepGraph_RefsIterator_VertexOfFaceTraits
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+ - symbol: BRepGraph_RefsOccurrenceOfProduct
+ - symbol: BRepGraph_RefsProductsOfOccurrence
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+ - symbol: Hatch_Line
+ - symbol: Hatch_LineForm
+ - symbol: Hatch_Parameter
+ - symbol: HelixBRep_BuilderHelix
+ - symbol: HelixGeom_BuilderApproxCurve
+ - symbol: HelixGeom_BuilderHelix
+ - symbol: HelixGeom_BuilderHelixCoil
+ - symbol: HelixGeom_BuilderHelixGen
+ - symbol: HelixGeom_HelixCurve
+ - symbol: HelixGeom_Tools
+ - symbol: Hermit
+ - symbol: IFGraph_AllConnected
+ - symbol: IFGraph_AllShared
+ - symbol: IFGraph_Articulations
+ - symbol: IFGraph_Compare
+ - symbol: IFGraph_ConnectedComponants
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+ - symbol: IFGraph_Cycles
+ - symbol: IFGraph_ExternalSources
+ - symbol: IFGraph_SCRoots
+ - symbol: IFGraph_StrongComponants
+ - symbol: IFGraph_SubPartsIterator
+ - symbol: IFSelect
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+ - symbol: IFSelect_Activator
+ - symbol: IFSelect_AppliedModifiers
+ - symbol: IFSelect_BasicDumper
+ - symbol: IFSelect_CheckCounter
+ - symbol: IFSelect_ContextWrite
+ - symbol: IFSelect_DispGlobal
+ - symbol: IFSelect_DispPerCount
+ - symbol: IFSelect_DispPerFiles
+ - symbol: IFSelect_DispPerOne
+ - symbol: IFSelect_DispPerSignature
+ - symbol: IFSelect_Dispatch
+ - symbol: IFSelect_EditValue
+ - symbol: IFSelect_Editor
+ - symbol: IFSelect_Functions
+ - symbol: IFSelect_GeneralModifier
+ - symbol: IFSelect_GraphCounter
+ - symbol: IFSelect_ListEditor
+ - symbol: IFSelect_ModelCopier
+ - symbol: IFSelect_ModifEditForm
+ - symbol: IFSelect_ModifReorder
+ - symbol: IFSelect_Modifier
+ - symbol: IFSelect_PacketList
+ - symbol: IFSelect_ParamEditor
+ - symbol: IFSelect_PrintCount
+ - symbol: IFSelect_PrintFail
+ - symbol: IFSelect_RemainMode
+ - symbol: IFSelect_ReturnStatus
+ - symbol: IFSelect_SelectAnyList
+ - symbol: IFSelect_SelectAnyType
+ - symbol: IFSelect_SelectBase
+ - symbol: IFSelect_SelectCombine
+ - symbol: IFSelect_SelectControl
+ - symbol: IFSelect_SelectDeduct
+ - symbol: IFSelect_SelectDiff
+ - symbol: IFSelect_SelectEntityNumber
+ - symbol: IFSelect_SelectErrorEntities
+ - symbol: IFSelect_SelectExplore
+ - symbol: IFSelect_SelectExtract
+ - symbol: IFSelect_SelectFlag
+ - symbol: IFSelect_SelectInList
+ - symbol: IFSelect_SelectIncorrectEntities
+ - symbol: IFSelect_SelectIntersection
+ - symbol: IFSelect_SelectModelEntities
+ - symbol: IFSelect_SelectModelRoots
+ - symbol: IFSelect_SelectPointed
+ - symbol: IFSelect_SelectRange
+ - symbol: IFSelect_SelectRootComps
+ - symbol: IFSelect_SelectRoots
+ - symbol: IFSelect_SelectSent
+ - symbol: IFSelect_SelectShared
+ - symbol: IFSelect_SelectSharing
+ - symbol: IFSelect_SelectSignature
+ - symbol: IFSelect_SelectSignedShared
+ - symbol: IFSelect_SelectSignedSharing
+ - symbol: IFSelect_SelectSuite
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+ - symbol: IFSelect_SelectionIterator
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+ - symbol: IFSelect_ShareOutResult
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+ - symbol: IFSelect_Signature
+ - symbol: IFSelect_SignatureList
+ - symbol: IFSelect_TransformStandard
+ - symbol: IFSelect_Transformer
+ - symbol: IFSelect_WorkLibrary
+ - symbol: IFSelect_WorkSession
+ - symbol: IGESAppli
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+ - symbol: IGESAppli_ElementResults
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+ - symbol: IGESAppli_FlowLineSpec
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+ - symbol: IGESAppli_LevelToPWBLayerMap
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+ - symbol: IGESAppli_NodalDisplAndRot
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+ - symbol: IGESAppli_PinNumber
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+ - symbol: IGESAppli_ReadWriteModule
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+ - symbol: IGESAppli_ToolDrilledHole
+ - symbol: IGESAppli_ToolElementResults
+ - symbol: IGESAppli_ToolFiniteElement
+ - symbol: IGESAppli_ToolFlow
+ - symbol: IGESAppli_ToolFlowLineSpec
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+ - symbol: IGESAppli_ToolLevelToPWBLayerMap
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+ - symbol: IGESAppli_ToolNodalDisplAndRot
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+ - symbol: IGESAppli_ToolPipingFlow
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+ - symbol: IGESAppli_ToolRegionRestriction
+ - symbol: IGESBasic
+ - symbol: IGESBasic_AssocGroupType
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+ - symbol: IGESBasic_ExternalRefFileName
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+ - symbol: IGESBasic_GroupWithoutBackP
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+ - symbol: IGESBasic_HArray1OfHArray1OfInteger
+ - symbol: IGESBasic_HArray1OfHArray1OfReal
+ - symbol: IGESBasic_HArray1OfHArray1OfXY
+ - symbol: IGESBasic_HArray1OfHArray1OfXYZ
+ - symbol: IGESBasic_Hierarchy
+ - symbol: IGESBasic_Name
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+ - symbol: IGESBasic_SingularSubfigure
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+ - symbol: IGESBasic_SubfigureDef
+ - symbol: IGESBasic_ToolAssocGroupType
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+ - symbol: IGESBasic_ToolExternalRefFileName
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+ - symbol: IGESBasic_ToolGroup
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+ - symbol: IGESSelect_ChangeLevelNumber
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+ - symbol: IGESSelect_FloatFormat
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+ - symbol: IGESSelect_IGESTypeForm
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+ - symbol: IGESSelect_RebuildDrawings
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+ - symbol: IGESSelect_SelectBypassGroup
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+ - symbol: IGESSelect_SelectFromSingleView
+ - symbol: IGESSelect_SelectLevelNumber
+ - symbol: IGESSelect_SelectName
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+ - symbol: IGESSelect_SelectSingleViewFrom
+ - symbol: IGESSelect_SelectSubordinate
+ - symbol: IGESSelect_SelectVisibleStatus
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+ - symbol: IGESSelect_SetLabel
+ - symbol: IGESSelect_SetVersion5
+ - symbol: IGESSelect_SignColor
+ - symbol: IGESSelect_SignLevelNumber
+ - symbol: IGESSelect_SignStatus
+ - symbol: IGESSelect_SplineToBSpline
+ - symbol: IGESSelect_UpdateCreationDate
+ - symbol: IGESSelect_UpdateFileName
+ - symbol: IGESSelect_UpdateLastChange
+ - symbol: IGESSelect_ViewSorter
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+ - symbol: IMeshData_Array1OfVertexOfDelaun
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+ - symbol: IMeshData_ListOfPnt2d
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+ - symbol: IMeshData_MapOfIntegerInteger
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+ - symbol: IMeshData_PCurve
+ - symbol: IMeshData_ParametersList
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+ - symbol: IMeshData_StatusOwner
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+ - symbol: IMeshData_VectorOfBoolean
+ - symbol: IMeshData_VectorOfCircle
+ - symbol: IMeshData_VectorOfElements
+ - symbol: IMeshData_VectorOfIEdgeHandles
+ - symbol: IMeshData_VectorOfIEdgePtrs
+ - symbol: IMeshData_VectorOfIFaceHandles
+ - symbol: IMeshData_VectorOfIPCurveHandles
+ - symbol: IMeshData_VectorOfIWireHandles
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+ - symbol: IMeshData_VectorOfOrientation
+ - symbol: IMeshData_VectorOfVertex
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+ - symbol: IntAna_ResultType
+ - symbol: IntCurveSurface_HInter
+ - symbol: IntCurveSurface_Intersection
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+ - symbol: TNaming_IteratorOnShapesSet
+ - symbol: TNaming_Localizer
+ - symbol: TNaming_Name
+ - symbol: TNaming_NameType
+ - symbol: TNaming_NamedShape
+ - symbol: TNaming_Naming
+ - symbol: TNaming_NamingTool
+ - symbol: TNaming_NewShapeIterator
+ - symbol: TNaming_OldShapeIterator
+ - symbol: TNaming_RefShape
+ - symbol: TNaming_SameShapeIterator
+ - symbol: TNaming_Scope
+ - symbol: TNaming_Selector
+ - symbol: TNaming_ShapesSet
+ - symbol: TNaming_Tool
+ - symbol: TNaming_TranslateTool
+ - symbol: TNaming_Translator
+ - symbol: TNaming_UsedShapes
+ - symbol: TopAbs
+ - symbol: TopAbs_Orientation
+ - symbol: TopAbs_ShapeEnum
+ - symbol: TopAbs_State
+ - symbol: TopBas_TestInterference
+ - symbol: TopCnx_EdgeFaceTransition
+ - symbol: TopExp
+ - symbol: TopExp_Explorer
+ - symbol: TopLoc_Datum3D
+ - symbol: TopLoc_ItemLocation
+ - symbol: TopLoc_Location
+ - symbol: TopLoc_SListNodeOfItemLocation
+ - symbol: TopLoc_SListOfItemLocation
+ - symbol: TopTools
+ - symbol: TopTools_FormatVersion
+ - symbol: TopTools_LocationSet
+ - symbol: TopTools_ShapeMapHasher
+ - symbol: TopTools_ShapeSet
+ - symbol: TopTrans_CurveTransition
+ - symbol: TopTrans_SurfaceTransition
+ - symbol: TopoDSToStep
+ - symbol: TopoDSToStep_Builder
+ - symbol: TopoDSToStep_BuilderError
+ - symbol: TopoDSToStep_FacetedError
+ - symbol: TopoDSToStep_FacetedTool
+ - symbol: TopoDSToStep_MakeBrepWithVoids
+ - symbol: TopoDSToStep_MakeEdgeError
+ - symbol: TopoDSToStep_MakeFaceError
+ - symbol: TopoDSToStep_MakeFacetedBrep
+ - symbol: TopoDSToStep_MakeFacetedBrepAndBrepWithVoids
+ - symbol: TopoDSToStep_MakeGeometricCurveSet
+ - symbol: TopoDSToStep_MakeManifoldSolidBrep
+ - symbol: TopoDSToStep_MakeShellBasedSurfaceModel
+ - symbol: TopoDSToStep_MakeStepEdge
+ - symbol: TopoDSToStep_MakeStepFace
+ - symbol: TopoDSToStep_MakeStepVertex
+ - symbol: TopoDSToStep_MakeStepWire
+ - symbol: TopoDSToStep_MakeTessellatedItem
+ - symbol: TopoDSToStep_MakeVertexError
+ - symbol: TopoDSToStep_MakeWireError
+ - symbol: TopoDSToStep_Root
+ - symbol: TopoDSToStep_Tool
+ - symbol: TopoDSToStep_WireframeBuilder
+ - symbol: TopoDS_AlertAttribute
+ - symbol: TopoDS_AlertWithShape
+ - symbol: TopoDS_Builder
+ - symbol: TopoDS_CompSolid
+ - symbol: TopoDS_Compound
+ - symbol: TopoDS_Edge
+ - symbol: TopoDS_Face
+ - symbol: TopoDS_FrozenShape
+ - symbol: TopoDS_HShape
+ - symbol: TopoDS_Iterator
+ - symbol: TopoDS_LockedShape
+ - symbol: TopoDS_Shape
+ - symbol: TopoDS_Shell
+ - symbol: TopoDS_Solid
+ - symbol: TopoDS_TCompSolid
+ - symbol: TopoDS_TCompound
+ - symbol: TopoDS_TEdge
+ - symbol: TopoDS_TFace
+ - symbol: TopoDS_TShape
+ - symbol: TopoDS_TShell
+ - symbol: TopoDS_TSolid
+ - symbol: TopoDS_TVertex
+ - symbol: TopoDS_TWire
+ - symbol: TopoDS_UnCompatibleShapes
+ - symbol: TopoDS_Vertex
+ - symbol: TopoDS_Wire
+ - symbol: TransferBRep_BinderOfShape
+ - symbol: TransferBRep_Reader
+ - symbol: TransferBRep_ShapeBinder
+ - symbol: TransferBRep_ShapeInfo
+ - symbol: TransferBRep_ShapeListBinder
+ - symbol: TransferBRep_ShapeMapper
+ - symbol: TransferBRep_TransferResultInfo
+ - symbol: Transfer_ActorDispatch
+ - symbol: Transfer_ActorOfFinderProcess
+ - symbol: Transfer_ActorOfProcessForFinder
+ - symbol: Transfer_ActorOfProcessForTransient
+ - symbol: Transfer_ActorOfTransientProcess
+ - symbol: Transfer_Binder
+ - symbol: Transfer_BinderOfTransientInteger
+ - symbol: Transfer_DataInfo
+ - symbol: Transfer_DispatchControl
+ - symbol: Transfer_FindHasher
+ - symbol: Transfer_Finder
+ - symbol: Transfer_FinderProcess
+ - symbol: Transfer_IteratorOfProcessForFinder
+ - symbol: Transfer_IteratorOfProcessForTransient
+ - symbol: Transfer_MapContainer
+ - symbol: Transfer_MultipleBinder
+ - symbol: Transfer_ProcessForFinder
+ - symbol: Transfer_ProcessForTransient
+ - symbol: Transfer_ResultFromModel
+ - symbol: Transfer_ResultFromTransient
+ - symbol: Transfer_SimpleBinderOfTransient
+ - symbol: Transfer_StatusExec
+ - symbol: Transfer_StatusResult
+ - symbol: Transfer_TransferDeadLoop
+ - symbol: Transfer_TransferDispatch
+ - symbol: Transfer_TransferFailure
+ - symbol: Transfer_TransferInput
+ - symbol: Transfer_TransferIterator
+ - symbol: Transfer_TransferOutput
+ - symbol: Transfer_TransientListBinder
+ - symbol: Transfer_TransientMapper
+ - symbol: Transfer_TransientProcess
+ - symbol: Transfer_UndefMode
+ - symbol: Transfer_VoidBinder
+ - symbol: Units
+ - symbol: UnitsAPI
+ - symbol: UnitsAPI_SystemUnits
+ - symbol: UnitsMethods
+ - symbol: UnitsMethods_LengthUnit
+ - symbol: Units_Dimensions
+ - symbol: Units_Explorer
+ - symbol: Units_Lexicon
+ - symbol: Units_MathSentence
+ - symbol: Units_Measurement
+ - symbol: Units_NoSuchType
+ - symbol: Units_NoSuchUnit
+ - symbol: Units_Quantity
+ - symbol: Units_Sentence
+ - symbol: Units_ShiftedToken
+ - symbol: Units_ShiftedUnit
+ - symbol: Units_Token
+ - symbol: Units_Unit
+ - symbol: Units_UnitSentence
+ - symbol: Units_UnitsDictionary
+ - symbol: Units_UnitsLexicon
+ - symbol: Units_UnitsSystem
+ - symbol: XCAFApp_Application
+ - symbol: XCAFDimTolObjects_AngularQualifier
+ - symbol: XCAFDimTolObjects_DatumModifWithValue
+ - symbol: XCAFDimTolObjects_DatumObject
+ - symbol: XCAFDimTolObjects_DatumSingleModif
+ - symbol: XCAFDimTolObjects_DatumTargetType
+ - symbol: XCAFDimTolObjects_DimensionFormVariance
+ - symbol: XCAFDimTolObjects_DimensionGrade
+ - symbol: XCAFDimTolObjects_DimensionModif
+ - symbol: XCAFDimTolObjects_DimensionObject
+ - symbol: XCAFDimTolObjects_DimensionQualifier
+ - symbol: XCAFDimTolObjects_DimensionType
+ - symbol: XCAFDimTolObjects_GeomToleranceMatReqModif
+ - symbol: XCAFDimTolObjects_GeomToleranceModif
+ - symbol: XCAFDimTolObjects_GeomToleranceObject
+ - symbol: XCAFDimTolObjects_GeomToleranceType
+ - symbol: XCAFDimTolObjects_GeomToleranceTypeValue
+ - symbol: XCAFDimTolObjects_GeomToleranceZoneModif
+ - symbol: XCAFDimTolObjects_ToleranceZoneAffectedPlane
+ - symbol: XCAFDimTolObjects_Tool
+ - symbol: XCAFDoc
+ - symbol: XCAFDoc_Area
+ - symbol: XCAFDoc_AssemblyGraph
+ - symbol: XCAFDoc_AssemblyGraph_Iterator
+ - symbol: XCAFDoc_AssemblyItemId
+ - symbol: XCAFDoc_AssemblyItemRef
+ - symbol: XCAFDoc_AssemblyIterator
+ - symbol: XCAFDoc_AssemblyTool
+ - symbol: XCAFDoc_Centroid
+ - symbol: XCAFDoc_ClippingPlaneTool
+ - symbol: XCAFDoc_Color
+ - symbol: XCAFDoc_ColorTool
+ - symbol: XCAFDoc_ColorType
+ - symbol: XCAFDoc_Datum
+ - symbol: XCAFDoc_DimTol
+ - symbol: XCAFDoc_DimTolTool
+ - symbol: XCAFDoc_Dimension
+ - symbol: XCAFDoc_DocumentTool
+ - symbol: XCAFDoc_Editor
+ - symbol: XCAFDoc_GeomTolerance
+ - symbol: XCAFDoc_GraphNode
+ - symbol: XCAFDoc_LayerTool
+ - symbol: XCAFDoc_LengthUnit
+ - symbol: XCAFDoc_Location
+ - symbol: XCAFDoc_Material
+ - symbol: XCAFDoc_MaterialTool
+ - symbol: XCAFDoc_Note
+ - symbol: XCAFDoc_NoteBalloon
+ - symbol: XCAFDoc_NoteBinData
+ - symbol: XCAFDoc_NoteComment
+ - symbol: XCAFDoc_NotesTool
+ - symbol: XCAFDoc_ShapeMapTool
+ - symbol: XCAFDoc_ShapeTool
+ - symbol: XCAFDoc_View
+ - symbol: XCAFDoc_ViewTool
+ - symbol: XCAFDoc_VisMaterial
+ - symbol: XCAFDoc_VisMaterialCommon
+ - symbol: XCAFDoc_VisMaterialPBR
+ - symbol: XCAFDoc_VisMaterialTool
+ - symbol: XCAFDoc_Volume
+ - symbol: XCAFNoteObjects_NoteObject
+ - symbol: XCAFPrs
+ - symbol: XCAFPrs_DocumentExplorer
+ - symbol: XCAFPrs_DocumentIdIterator
+ - symbol: XCAFPrs_DocumentNode
+ - symbol: XCAFPrs_Style
+ - symbol: XCAFView_Object
+ - symbol: XCAFView_ProjectionType
+ - symbol: XSAlgo
+ - symbol: XSAlgo_AlgoContainer
+ - symbol: XSControl
+ - symbol: XSControl_ConnectedShapes
+ - symbol: XSControl_Controller
+ - symbol: XSControl_FuncShape
+ - symbol: XSControl_Functions
+ - symbol: XSControl_Reader
+ - symbol: XSControl_SelectForTransfer
+ - symbol: XSControl_SignTransferStatus
+ - symbol: XSControl_TransferReader
+ - symbol: XSControl_TransferWriter
+ - symbol: XSControl_Utils
+ - symbol: XSControl_Vars
+ - symbol: XSControl_WorkSession
+ - symbol: XSControl_WorkSessionMap
+ - symbol: XSControl_Writer
+ - symbol: gce_ErrorType
+ - symbol: gce_MakeCirc
+ - symbol: gce_MakeCirc2d
+ - symbol: gce_MakeCone
+ - symbol: gce_MakeCylinder
+ - symbol: gce_MakeDir
+ - symbol: gce_MakeDir2d
+ - symbol: gce_MakeElips
+ - symbol: gce_MakeElips2d
+ - symbol: gce_MakeHypr
+ - symbol: gce_MakeHypr2d
+ - symbol: gce_MakeLin
+ - symbol: gce_MakeLin2d
+ - symbol: gce_MakeMirror
+ - symbol: gce_MakeMirror2d
+ - symbol: gce_MakeParab
+ - symbol: gce_MakeParab2d
+ - symbol: gce_MakePln
+ - symbol: gce_MakeRotation
+ - symbol: gce_MakeRotation2d
+ - symbol: gce_MakeScale
+ - symbol: gce_MakeScale2d
+ - symbol: gce_MakeTranslation
+ - symbol: gce_MakeTranslation2d
+ - symbol: gce_Root
+ - symbol: gp
+ - symbol: gp_Ax1
+ - symbol: gp_Ax2
+ - symbol: gp_Ax22d
+ - symbol: gp_Ax2d
+ - symbol: gp_Ax3
+ - symbol: gp_Circ
+ - symbol: gp_Circ2d
+ - symbol: gp_Cone
+ - symbol: gp_Cylinder
+ - symbol: gp_Dir
+ - symbol: gp_Dir2d
+ - symbol: gp_Elips
+ - symbol: gp_Elips2d
+ - symbol: gp_EulerSequence
+ - symbol: gp_GTrsf
+ - symbol: gp_GTrsf2d
+ - symbol: gp_Hypr
+ - symbol: gp_Hypr2d
+ - symbol: gp_Lin
+ - symbol: gp_Lin2d
+ - symbol: gp_Mat
+ - symbol: gp_Mat2d
+ - symbol: gp_Parab
+ - symbol: gp_Parab2d
+ - symbol: gp_Pln
+ - symbol: gp_Pnt
+ - symbol: gp_Pnt2d
+ - symbol: gp_Quaternion
+ - symbol: gp_QuaternionNLerp
+ - symbol: gp_QuaternionSLerp
+ - symbol: gp_Sphere
+ - symbol: gp_Torus
+ - symbol: gp_Trsf
+ - symbol: gp_Trsf2d
+ - symbol: gp_TrsfForm
+ - symbol: gp_Vec
+ - symbol: gp_Vec2d
+ - symbol: gp_XY
+ - symbol: gp_XYZ
+ - symbol: math
+ - symbol: math_BFGS
+ - symbol: math_BissecNewton
+ - symbol: math_BracketMinimum
+ - symbol: math_BracketedRoot
+ - symbol: math_BrentMinimum
+ - symbol: math_BullardGenerator
+ - symbol: math_ComputeGaussPointsAndWeights
+ - symbol: math_ComputeKronrodPointsAndWeights
+ - symbol: math_Crout
+ - symbol: math_DirectPolynomialRoots
+ - symbol: math_DoubleTab
+ - symbol: math_EigenValuesSearcher
+ - symbol: math_FRPR
+ - symbol: math_Function
+ - symbol: math_FunctionAllRoots
+ - symbol: math_FunctionRoot
+ - symbol: math_FunctionRoots
+ - symbol: math_FunctionSample
+ - symbol: math_FunctionSet
+ - symbol: math_FunctionSetRoot
+ - symbol: math_FunctionSetWithDerivatives
+ - symbol: math_FunctionWithDerivative
+ - symbol: math_Gauss
+ - symbol: math_GaussLeastSquare
+ - symbol: math_GaussMultipleIntegration
+ - symbol: math_GaussSetIntegration
+ - symbol: math_GaussSingleIntegration
+ - symbol: math_GlobOptMin
+ - symbol: math_Jacobi
+ - symbol: math_KronrodSingleIntegration
+ - symbol: math_Matrix
+ - symbol: math_MultipleVarFunction
+ - symbol: math_MultipleVarFunctionWithGradient
+ - symbol: math_MultipleVarFunctionWithHessian
+ - symbol: math_NewtonFunctionRoot
+ - symbol: math_NotSquare
+ - symbol: math_PSO
+ - symbol: math_PSOParticlesPool
+ - symbol: math_Powell
+ - symbol: math_SVD
+ - symbol: math_SingularMatrix
+ - symbol: math_Status
+ - symbol: math_TrigonometricEquationFunction
+ - symbol: math_TrigonometricFunctionRoots
+ - symbol: math_Uzawa
+ - symbol: math_ValueAndWeight
+ additionalBindCode: |
+ #include
+ #include
+ #include
+ #include
+ #include
+ #include
+ #include
+ #include
+ #include
+ #include
+ #include
+ #include
+ struct TopoDS_Cast {};
+ using namespace emscripten;
+ EMSCRIPTEN_BINDINGS(ocjs_additional) {
+ function("FairCurve_Batten_Compute", optional_override([](FairCurve_Batten& self, int nbIter, double tol) -> int {
+ FairCurve_AnalysisCode code;
+ self.Compute(code, nbIter, tol);
+ return static_cast(code);
+ }));
+ function("FairCurve_MinimalVariation_Compute", optional_override([](FairCurve_MinimalVariation& self, int nbIter, double tol) -> int {
+ FairCurve_AnalysisCode code;
+ self.Compute(code, nbIter, tol);
+ return static_cast(code);
+ }));
+ class_("TopoDS_Cast")
+ .class_function("Edge", optional_override([](const TopoDS_Shape& s) -> TopoDS_Edge { return TopoDS::Edge(s); }))
+ .class_function("Wire", optional_override([](const TopoDS_Shape& s) -> TopoDS_Wire { return TopoDS::Wire(s); }))
+ .class_function("Face", optional_override([](const TopoDS_Shape& s) -> TopoDS_Face { return TopoDS::Face(s); }))
+ .class_function("Vertex", optional_override([](const TopoDS_Shape& s) -> TopoDS_Vertex { return TopoDS::Vertex(s); }))
+ .class_function("Shell", optional_override([](const TopoDS_Shape& s) -> TopoDS_Shell { return TopoDS::Shell(s); }))
+ .class_function("Solid", optional_override([](const TopoDS_Shape& s) -> TopoDS_Solid { return TopoDS::Solid(s); }))
+ .class_function("Compound", optional_override([](const TopoDS_Shape& s) -> TopoDS_Compound { return TopoDS::Compound(s); }))
+ ;
+ }
+ emccFlags:
+ - -fwasm-exceptions
+ - -sEXPORT_EXCEPTION_HANDLING_HELPERS
+ - -sEXPORT_ES6=1
+ - -sMODULARIZE
+ - -sALLOW_MEMORY_GROWTH=1
+ - -sEXPORTED_RUNTIME_METHODS=["FS"]
+ - -sINITIAL_MEMORY=128MB
+ - -sMAXIMUM_MEMORY=4GB
+ - -sUSE_FREETYPE=1
+ - -sERROR_ON_UNDEFINED_SYMBOLS=0
+ - --no-entry
+ - -Wl,--allow-undefined
+ - --emit-symbol-map
+ - -sSTACK_SIZE=8388608
+ - -sWASM_BIGINT
+ - -msimd128
+ - -O3
+ # ── Multi-threading additions (delta from full.yml) ─────────────
+ # Recipe: docs-site/content/docs/package/guides/multi-threading.mdx (published /multi subpath).
+ # -sEVAL_CTORS=2 (present in full.yml) is DROPPED -- ctor evaluation
+ # order is non-deterministic under pthread workers.
+ - -pthread
+ - -sUSE_PTHREADS=1
+ # Pre-spawn one worker per logical CPU on the host. The expression is evaluated by the
+ # generated JS glue at module-instantiation time, so a single binary adapts to whatever
+ # hardware loads it. See BENCHMARKS.md — Impact of R1 (PTHREAD_POOL_SIZE bump).
+ - -sPTHREAD_POOL_SIZE=navigator.hardwareConcurrency
+ - -sSHARED_MEMORY=1
+ - -sENVIRONMENT=web,worker,node
diff --git a/build-configs/full_multi_browser.yml b/build-configs/full_multi_browser.yml
new file mode 100644
index 00000000..0ed19e29
--- /dev/null
+++ b/build-configs/full_multi_browser.yml
@@ -0,0 +1,4541 @@
+# R12 — Browser-only multi-threaded build (opt-in variant of full_multi.yml).
+#
+# This configuration adds `-sGROWABLE_ARRAYBUFFERS=1` to the multi-threaded
+# base so consumers can avoid the per-call HEAP* re-fetch dance documented
+# in `docs-site/content/docs/package/guides/multi-threading.mdx` (search
+# for "Performance notes"). The flag tells Emscripten to emit JS glue that
+# calls `WebAssembly.Memory.prototype.toResizableBuffer()` to wrap the
+# pthread `SharedArrayBuffer` as a resizable view — eliminating the
+# `-Wpthreads-mem-growth` advisory entirely.
+#
+# Runtime support matrix (May 2026 baseline):
+# Supported:
+# - Chrome / Edge >= 144
+# - Firefox >= 145
+# - Safari >= 26.2 (desktop + iOS)
+# NOT supported (do NOT ship this build to these runtimes):
+# - Node.js (all current LTS) — runtime TypeError on init:
+# `TypeError: wasmMemory.toResizableBuffer is not a function`
+# - Bun (all current versions)
+# - Deno (all current versions)
+# - Samsung Internet (lags behind upstream Chromium)
+#
+# Use `full_multi.yml` if you need to support any of the unsupported
+# runtimes; the default multi-threaded build keeps `-sGROWABLE_ARRAYBUFFERS=0`
+# precisely so it stays compatible with Node-based test harnesses, Bun,
+# Deno, and legacy mobile browsers.
+#
+# Rollback recipe — to revert a consumer to the broadly-compatible build,
+# swap their YAML's `link full_multi_browser.yml` for `link full_multi.yml`
+# (no other changes needed; the artefact names are identical).
+mainBuild:
+ name: opencascade_full_multi_browser.js
+ bindings:
+ - symbol: APIHeaderSection_EditHeader
+ - symbol: APIHeaderSection_MakeHeader
+ - symbol: Adaptor2d_Curve2d
+ - symbol: Adaptor2d_Line2d
+ - symbol: Adaptor2d_OffsetCurve
+ - symbol: Adaptor3d_Curve
+ - symbol: Adaptor3d_CurveOnSurface
+ - symbol: Adaptor3d_HSurfaceTool
+ - symbol: Adaptor3d_HVertex
+ - symbol: Adaptor3d_InterFunc
+ - symbol: Adaptor3d_IsoCurve
+ - symbol: Adaptor3d_Surface
+ - symbol: Adaptor3d_TopolTool
+ - symbol: AdvApprox_ApproxAFunction
+ - symbol: AdvApprox_Cutting
+ - symbol: AdvApprox_DichoCutting
+ - symbol: AdvApprox_EvaluatorFunction
+ - symbol: AdvApprox_PrefAndRec
+ - symbol: AdvApprox_PrefCutting
+ - symbol: AdvApprox_SimpleApprox
+ - symbol: AppBlend_Approx
+ - symbol: AppCont_Function
+ - symbol: AppCont_LeastSquare
+ - symbol: AppParCurves
+ - symbol: AppParCurves_Constraint
+ - symbol: AppParCurves_ConstraintCouple
+ - symbol: AppParCurves_MultiBSpCurve
+ - symbol: AppParCurves_MultiCurve
+ - symbol: AppParCurves_MultiPoint
+ - symbol: AppStdL_Application
+ - symbol: AppStd_Application
+ - symbol: ApproxInt_KnotTools
+ - symbol: ApproxInt_SvSurfaces
+ - symbol: Approx_BSplineApproxInterp
+ - symbol: Approx_Curve2d
+ - symbol: Approx_Curve3d
+ - symbol: Approx_CurveOnSurface
+ - symbol: Approx_CurvilinearParameter
+ - symbol: Approx_CurvlinFunc
+ - symbol: Approx_FitAndDivide
+ - symbol: Approx_FitAndDivide2d
+ - symbol: Approx_MCurvesToBSpCurve
+ - symbol: Approx_ParametrizationType
+ - symbol: Approx_SameParameter
+ - symbol: Approx_Status
+ - symbol: Approx_SweepApproximation
+ - symbol: Approx_SweepFunction
+ - symbol: BOPAlgo_AlertAcquiredSelfIntersection
+ - symbol: BOPAlgo_AlertBOPNotAllowed
+ - symbol: BOPAlgo_AlertBOPNotSet
+ - symbol: BOPAlgo_AlertBadPositioning
+ - symbol: BOPAlgo_AlertBuilderFailed
+ - symbol: BOPAlgo_AlertBuildingPCurveFailed
+ - symbol: BOPAlgo_AlertEmptyShape
+ - symbol: BOPAlgo_AlertFaceBuilderUnusedEdges
+ - symbol: BOPAlgo_AlertIntersectionFailed
+ - symbol: BOPAlgo_AlertIntersectionOfPairOfShapesFailed
+ - symbol: BOPAlgo_AlertMultiDimensionalArguments
+ - symbol: BOPAlgo_AlertMultipleArguments
+ - symbol: BOPAlgo_AlertNoFacesToRemove
+ - symbol: BOPAlgo_AlertNoFiller
+ - symbol: BOPAlgo_AlertNoPeriodicityRequired
+ - symbol: BOPAlgo_AlertNotSplittableEdge
+ - symbol: BOPAlgo_AlertNullInputShapes
+ - symbol: BOPAlgo_AlertPostTreatFF
+ - symbol: BOPAlgo_AlertRemovalOfIBForEdgesFailed
+ - symbol: BOPAlgo_AlertRemovalOfIBForFacesFailed
+ - symbol: BOPAlgo_AlertRemovalOfIBForMDimShapes
+ - symbol: BOPAlgo_AlertRemovalOfIBForSolidsFailed
+ - symbol: BOPAlgo_AlertRemoveFeaturesFailed
+ - symbol: BOPAlgo_AlertSelfInterferingShape
+ - symbol: BOPAlgo_AlertShapeIsNotPeriodic
+ - symbol: BOPAlgo_AlertShellSplitterFailed
+ - symbol: BOPAlgo_AlertSolidBuilderFailed
+ - symbol: BOPAlgo_AlertSolidBuilderUnusedFaces
+ - symbol: BOPAlgo_AlertTooFewArguments
+ - symbol: BOPAlgo_AlertTooSmallEdge
+ - symbol: BOPAlgo_AlertUnableToGlue
+ - symbol: BOPAlgo_AlertUnableToMakeClosedEdgeOnFace
+ - symbol: BOPAlgo_AlertUnableToMakeIdentical
+ - symbol: BOPAlgo_AlertUnableToMakePeriodic
+ - symbol: BOPAlgo_AlertUnableToOrientTheShape
+ - symbol: BOPAlgo_AlertUnableToRemoveTheFeature
+ - symbol: BOPAlgo_AlertUnableToRepeat
+ - symbol: BOPAlgo_AlertUnableToTrim
+ - symbol: BOPAlgo_AlertUnknownShape
+ - symbol: BOPAlgo_AlertUnsupportedType
+ - symbol: BOPAlgo_AlertUserBreak
+ - symbol: BOPAlgo_Algo
+ - symbol: BOPAlgo_ArgumentAnalyzer
+ - symbol: BOPAlgo_BOP
+ - symbol: BOPAlgo_Builder
+ - symbol: BOPAlgo_BuilderArea
+ - symbol: BOPAlgo_BuilderFace
+ - symbol: BOPAlgo_BuilderShape
+ - symbol: BOPAlgo_BuilderSolid
+ - symbol: BOPAlgo_CellsBuilder
+ - symbol: BOPAlgo_CheckResult
+ - symbol: BOPAlgo_CheckStatus
+ - symbol: BOPAlgo_CheckerSI
+ - symbol: BOPAlgo_EdgeInfo
+ - symbol: BOPAlgo_GlueEnum
+ - symbol: BOPAlgo_MakeConnected
+ - symbol: BOPAlgo_MakePeriodic
+ - symbol: BOPAlgo_MakePeriodic_PeriodicityParams
+ - symbol: BOPAlgo_MakerVolume
+ - symbol: BOPAlgo_Operation
+ - symbol: BOPAlgo_Options
+ - symbol: BOPAlgo_PISteps
+ - symbol: BOPAlgo_ParallelAlgo
+ - symbol: BOPAlgo_RemoveFeatures
+ - symbol: BOPAlgo_Section
+ - symbol: BOPAlgo_SectionAttribute
+ - symbol: BOPAlgo_ShellSplitter
+ - symbol: BOPAlgo_Splitter
+ - symbol: BOPAlgo_Tools
+ - symbol: BOPAlgo_ToolsProvider
+ - symbol: BOPAlgo_WireEdgeSet
+ - symbol: BOPAlgo_WireSplitter
+ - symbol: BOPDS_CommonBlock
+ - symbol: BOPDS_CoupleOfPaveBlocks
+ - symbol: BOPDS_Curve
+ - symbol: BOPDS_DS
+ - symbol: BOPDS_FaceInfo
+ - symbol: BOPDS_IndexRange
+ - symbol: BOPDS_Interf
+ - symbol: BOPDS_InterfEE
+ - symbol: BOPDS_InterfEF
+ - symbol: BOPDS_InterfEZ
+ - symbol: BOPDS_InterfFF
+ - symbol: BOPDS_InterfFZ
+ - symbol: BOPDS_InterfVE
+ - symbol: BOPDS_InterfVF
+ - symbol: BOPDS_InterfVV
+ - symbol: BOPDS_InterfVZ
+ - symbol: BOPDS_InterfZZ
+ - symbol: BOPDS_Pair
+ - symbol: BOPDS_Pave
+ - symbol: BOPDS_PaveBlock
+ - symbol: BOPDS_Point
+ - symbol: BOPDS_ShapeInfo
+ - symbol: BOPDS_SubIterator
+ - symbol: BOPDS_Tools
+ - symbol: BOPTools_AlgoTools
+ - symbol: BOPTools_AlgoTools2D
+ - symbol: BOPTools_AlgoTools3D
+ - symbol: BOPTools_ConnexityBlock
+ - symbol: BOPTools_CoupleOfShape
+ - symbol: BOPTools_Set
+ - symbol: BRepAdaptor_CompCurve
+ - symbol: BRepAdaptor_Curve
+ - symbol: BRepAdaptor_Curve2d
+ - symbol: BRepAdaptor_Surface
+ - symbol: BRepAlgo
+ - symbol: BRepAlgoAPI_Algo
+ - symbol: BRepAlgoAPI_BooleanOperation
+ - symbol: BRepAlgoAPI_BuilderAlgo
+ - symbol: BRepAlgoAPI_Check
+ - symbol: BRepAlgoAPI_Common
+ - symbol: BRepAlgoAPI_Cut
+ - symbol: BRepAlgoAPI_Defeaturing
+ - symbol: BRepAlgoAPI_Fuse
+ - symbol: BRepAlgoAPI_Section
+ - symbol: BRepAlgoAPI_Splitter
+ - symbol: BRepAlgo_AsDes
+ - symbol: BRepAlgo_FaceRestrictor
+ - symbol: BRepAlgo_Image
+ - symbol: BRepAlgo_Loop
+ - symbol: BRepAlgo_NormalProjection
+ - symbol: BRepApprox_ApproxLine
+ - symbol: BRepApprox_BSpGradient_BFGSOfMyBSplGradientOfTheComputeLineOfApprox
+ - symbol: BRepApprox_BSpParFunctionOfMyBSplGradientOfTheComputeLineOfApprox
+ - symbol: BRepApprox_BSpParLeastSquareOfMyBSplGradientOfTheComputeLineOfApprox
+ - symbol: BRepApprox_Gradient_BFGSOfMyGradientOfTheComputeLineBezierOfApprox
+ - symbol: BRepApprox_Gradient_BFGSOfMyGradientbisOfTheComputeLineOfApprox
+ - symbol: BRepApprox_MyBSplGradientOfTheComputeLineOfApprox
+ - symbol: BRepApprox_MyGradientOfTheComputeLineBezierOfApprox
+ - symbol: BRepApprox_MyGradientbisOfTheComputeLineOfApprox
+ - symbol: BRepApprox_ParFunctionOfMyGradientOfTheComputeLineBezierOfApprox
+ - symbol: BRepApprox_ParFunctionOfMyGradientbisOfTheComputeLineOfApprox
+ - symbol: BRepApprox_ParLeastSquareOfMyGradientOfTheComputeLineBezierOfApprox
+ - symbol: BRepApprox_ParLeastSquareOfMyGradientbisOfTheComputeLineOfApprox
+ - symbol: BRepApprox_SurfaceTool
+ - symbol: BRepApprox_TheImpPrmSvSurfacesOfApprox
+ - symbol: BRepApprox_TheInt2SOfThePrmPrmSvSurfacesOfApprox
+ - symbol: BRepApprox_TheMultiLineOfApprox
+ - symbol: BRepApprox_TheMultiLineToolOfApprox
+ - symbol: BRepApprox_ThePrmPrmSvSurfacesOfApprox
+ - symbol: BRepApprox_TheZerImpFuncOfTheImpPrmSvSurfacesOfApprox
+ - symbol: BRepBlend_AppFunc
+ - symbol: BRepBlend_AppFuncRoot
+ - symbol: BRepBlend_AppFuncRst
+ - symbol: BRepBlend_AppFuncRstRst
+ - symbol: BRepBlend_AppSurf
+ - symbol: BRepBlend_AppSurface
+ - symbol: BRepBlend_BlendTool
+ - symbol: BRepBlend_CSWalking
+ - symbol: BRepBlend_CurvPointRadInv
+ - symbol: BRepBlend_Extremity
+ - symbol: BRepBlend_HCurve2dTool
+ - symbol: BRepBlend_HCurveTool
+ - symbol: BRepBlend_Line
+ - symbol: BRepBlend_PointOnRst
+ - symbol: BRepBlend_RstRstConstRad
+ - symbol: BRepBlend_RstRstEvolRad
+ - symbol: BRepBlend_RstRstLineBuilder
+ - symbol: BRepBlend_SurfCurvConstRadInv
+ - symbol: BRepBlend_SurfCurvEvolRadInv
+ - symbol: BRepBlend_SurfPointConstRadInv
+ - symbol: BRepBlend_SurfPointEvolRadInv
+ - symbol: BRepBlend_SurfRstConstRad
+ - symbol: BRepBlend_SurfRstEvolRad
+ - symbol: BRepBlend_SurfRstLineBuilder
+ - symbol: BRepBndLib
+ - symbol: BRepBuilderAPI
+ - symbol: BRepBuilderAPI_BndBoxTreeSelector
+ - symbol: BRepBuilderAPI_Collect
+ - symbol: BRepBuilderAPI_Command
+ - symbol: BRepBuilderAPI_Copy
+ - symbol: BRepBuilderAPI_EdgeError
+ - symbol: BRepBuilderAPI_FaceError
+ - symbol: BRepBuilderAPI_FastSewing
+ - symbol: BRepBuilderAPI_FindPlane
+ - symbol: BRepBuilderAPI_GTransform
+ - symbol: BRepBuilderAPI_MakeEdge
+ - symbol: BRepBuilderAPI_MakeEdge2d
+ - symbol: BRepBuilderAPI_MakeFace
+ - symbol: BRepBuilderAPI_MakePolygon
+ - symbol: BRepBuilderAPI_MakeShape
+ - symbol: BRepBuilderAPI_MakeShapeOnMesh
+ - symbol: BRepBuilderAPI_MakeShell
+ - symbol: BRepBuilderAPI_MakeSolid
+ - symbol: BRepBuilderAPI_MakeVertex
+ - symbol: BRepBuilderAPI_MakeWire
+ - symbol: BRepBuilderAPI_ModifyShape
+ - symbol: BRepBuilderAPI_NurbsConvert
+ - symbol: BRepBuilderAPI_PipeError
+ - symbol: BRepBuilderAPI_Sewing
+ - symbol: BRepBuilderAPI_ShapeModification
+ - symbol: BRepBuilderAPI_ShellError
+ - symbol: BRepBuilderAPI_Transform
+ - symbol: BRepBuilderAPI_TransitionMode
+ - symbol: BRepBuilderAPI_VertexInspector
+ - symbol: BRepBuilderAPI_WireError
+ - symbol: BRepCheck
+ - symbol: BRepCheck_Analyzer
+ - symbol: BRepCheck_Edge
+ - symbol: BRepCheck_Face
+ - symbol: BRepCheck_Result
+ - symbol: BRepCheck_Shell
+ - symbol: BRepCheck_Solid
+ - symbol: BRepCheck_Status
+ - symbol: BRepCheck_Vertex
+ - symbol: BRepCheck_Wire
+ - symbol: BRepClass3d
+ - symbol: BRepClass3d_BndBoxTreeSelectorLine
+ - symbol: BRepClass3d_BndBoxTreeSelectorPoint
+ - symbol: BRepClass3d_Intersector3d
+ - symbol: BRepClass3d_SClassifier
+ - symbol: BRepClass3d_SolidClassifier
+ - symbol: BRepClass3d_SolidExplorer
+ - symbol: BRepClass3d_SolidPassiveClassifier
+ - symbol: BRepClass_Edge
+ - symbol: BRepClass_FClass2dOfFClassifier
+ - symbol: BRepClass_FClassifier
+ - symbol: BRepClass_FaceClassifier
+ - symbol: BRepClass_FacePassiveClassifier
+ - symbol: BRepClass_Intersector
+ - symbol: BRepExtrema_DistShapeShape
+ - symbol: BRepExtrema_DistanceSS
+ - symbol: BRepExtrema_ElementFilter
+ - symbol: BRepExtrema_ExtCC
+ - symbol: BRepExtrema_ExtCF
+ - symbol: BRepExtrema_ExtFF
+ - symbol: BRepExtrema_ExtPC
+ - symbol: BRepExtrema_ExtPF
+ - symbol: BRepExtrema_OverlapTool
+ - symbol: BRepExtrema_Poly
+ - symbol: BRepExtrema_ProximityDistTool_PrjState
+ - symbol: BRepExtrema_SelfIntersection
+ - symbol: BRepExtrema_ShapeProximity
+ - symbol: BRepExtrema_SolutionElem
+ - symbol: BRepExtrema_SupportType
+ - symbol: BRepExtrema_TriangleSet
+ - symbol: BRepExtrema_UnCompatibleShape
+ - symbol: BRepExtrema_VertexInspector
+ - symbol: BRepFeat_Builder
+ - symbol: BRepFeat_Form
+ - symbol: BRepFeat_Gluer
+ - symbol: BRepFeat_MakeCylindricalHole
+ - symbol: BRepFeat_MakeDPrism
+ - symbol: BRepFeat_MakePipe
+ - symbol: BRepFeat_MakePrism
+ - symbol: BRepFeat_MakeRevol
+ - symbol: BRepFeat_PerfSelection
+ - symbol: BRepFeat_RibSlot
+ - symbol: BRepFeat_SplitShape
+ - symbol: BRepFeat_Status
+ - symbol: BRepFeat_StatusError
+ - symbol: BRepFill
+ - symbol: BRepFill_ACRLaw
+ - symbol: BRepFill_AdvancedEvolved
+ - symbol: BRepFill_ApproxSeewing
+ - symbol: BRepFill_CompatibleWires
+ - symbol: BRepFill_ComputeCLine
+ - symbol: BRepFill_CurveConstraint
+ - symbol: BRepFill_Draft
+ - symbol: BRepFill_DraftLaw
+ - symbol: BRepFill_Edge3DLaw
+ - symbol: BRepFill_EdgeFaceAndOrder
+ - symbol: BRepFill_EdgeOnSurfLaw
+ - symbol: BRepFill_Evolved
+ - symbol: BRepFill_FaceAndOrder
+ - symbol: BRepFill_Filling
+ - symbol: BRepFill_Generator
+ - symbol: BRepFill_LocationLaw
+ - symbol: BRepFill_MultiLine
+ - symbol: BRepFill_NSections
+ - symbol: BRepFill_OffsetAncestors
+ - symbol: BRepFill_OffsetWire
+ - symbol: BRepFill_Pipe
+ - symbol: BRepFill_PipeShell
+ - symbol: BRepFill_Section
+ - symbol: BRepFill_SectionLaw
+ - symbol: BRepFill_SectionPlacement
+ - symbol: BRepFill_ShapeLaw
+ - symbol: BRepFill_Sweep
+ - symbol: BRepFill_ThruSectionErrorStatus
+ - symbol: BRepFill_TransitionStyle
+ - symbol: BRepFill_TrimEdgeTool
+ - symbol: BRepFill_TrimShellCorner
+ - symbol: BRepFill_TypeOfContact
+ - symbol: BRepFilletAPI_LocalOperation
+ - symbol: BRepFilletAPI_MakeChamfer
+ - symbol: BRepFilletAPI_MakeFillet
+ - symbol: BRepFilletAPI_MakeFillet2d
+ - symbol: BRepGProp
+ - symbol: BRepGProp_Cinert
+ - symbol: BRepGProp_Domain
+ - symbol: BRepGProp_EdgeTool
+ - symbol: BRepGProp_Face
+ - symbol: BRepGProp_MeshCinert
+ - symbol: BRepGProp_Sinert
+ - symbol: BRepGProp_TFunction
+ - symbol: BRepGProp_UFunction
+ - symbol: BRepGProp_Vinert
+ - symbol: BRepGraph
+ - symbol: BRepGraphInc_BaseDef
+ - symbol: BRepGraphInc_BaseRef
+ - symbol: BRepGraphInc_BaseRep
+ - symbol: BRepGraphInc_ChildRef
+ - symbol: BRepGraphInc_CoEdgeDef
+ - symbol: BRepGraphInc_CoEdgeRef
+ - symbol: BRepGraphInc_CompSolidDef
+ - symbol: BRepGraphInc_CompoundDef
+ - symbol: BRepGraphInc_Curve2DRep
+ - symbol: BRepGraphInc_Curve3DRep
+ - symbol: BRepGraphInc_EdgeDef
+ - symbol: BRepGraphInc_FaceDef
+ - symbol: BRepGraphInc_FaceRef
+ - symbol: BRepGraphInc_OccurrenceDef
+ - symbol: BRepGraphInc_OccurrenceRef
+ - symbol: BRepGraphInc_Polygon2DRep
+ - symbol: BRepGraphInc_Polygon3DRep
+ - symbol: BRepGraphInc_PolygonOnTriRep
+ - symbol: BRepGraphInc_Populate
+ - symbol: BRepGraphInc_ProductDef
+ - symbol: BRepGraphInc_Reconstruct
+ - symbol: BRepGraphInc_Reconstruct_Cache
+ - symbol: BRepGraphInc_Reconstruct_Cache_TempScope
+ - symbol: BRepGraphInc_ReverseIndex
+ - symbol: BRepGraphInc_ShellDef
+ - symbol: BRepGraphInc_ShellRef
+ - symbol: BRepGraphInc_SolidDef
+ - symbol: BRepGraphInc_SolidRef
+ - symbol: BRepGraphInc_Storage
+ - symbol: BRepGraphInc_SurfaceRep
+ - symbol: BRepGraphInc_TriangulationRep
+ - symbol: BRepGraphInc_VertexDef
+ - symbol: BRepGraphInc_VertexRef
+ - symbol: BRepGraphInc_WireDef
+ - symbol: BRepGraphInc_WireInstance
+ - symbol: BRepGraphInc_WireRef
+ - symbol: BRepGraph_Builder
+ - symbol: BRepGraph_CacheKind
+ - symbol: BRepGraph_CacheKindRegistry
+ - symbol: BRepGraph_CacheValue
+ - symbol: BRepGraph_CacheView
+ - symbol: BRepGraph_ChildExplorer
+ - symbol: BRepGraph_ChildRefId
+ - symbol: BRepGraph_CoEdgeId
+ - symbol: BRepGraph_CoEdgeRefId
+ - symbol: BRepGraph_CoEdgesOfEdge
+ - symbol: BRepGraph_CompSolidId
+ - symbol: BRepGraph_CompSolidsOfSolid
+ - symbol: BRepGraph_Compact
+ - symbol: BRepGraph_CompoundId
+ - symbol: BRepGraph_CompoundsOfCompSolid
+ - symbol: BRepGraph_Copy
+ - symbol: BRepGraph_Curve2DRepId
+ - symbol: BRepGraph_Curve3DRepId
+ - symbol: BRepGraph_Data
+ - symbol: BRepGraph_Deduplicate
+ - symbol: BRepGraph_DeferredScope
+ - symbol: BRepGraph_DefsChildOfCompound
+ - symbol: BRepGraph_DefsChildOfShell
+ - symbol: BRepGraph_DefsChildOfSolid
+ - symbol: BRepGraph_DefsCoEdgeOfWire
+ - symbol: BRepGraph_DefsEdgeOfWire
+ - symbol: BRepGraph_DefsFaceOfShell
+ - symbol: BRepGraph_DefsIterator_ChildOfCompoundTraits
+ - symbol: BRepGraph_DefsIterator_ChildOfShellTraits
+ - symbol: BRepGraph_DefsIterator_ChildOfSolidTraits
+ - symbol: BRepGraph_DefsIterator_CoEdgeOfWireTraits
+ - symbol: BRepGraph_DefsIterator_DefsVertexOfEdge
+ - symbol: BRepGraph_DefsIterator_EdgeOfWireTraits
+ - symbol: BRepGraph_DefsIterator_FaceOfShellTraits
+ - symbol: BRepGraph_DefsIterator_OccurrenceOfProductTraits
+ - symbol: BRepGraph_DefsIterator_ShellOfSolidTraits
+ - symbol: BRepGraph_DefsIterator_SolidOfCompSolidTraits
+ - symbol: BRepGraph_DefsIterator_VertexOfFaceTraits
+ - symbol: BRepGraph_DefsIterator_WireOfFaceTraits
+ - symbol: BRepGraph_DefsOccurrenceOfProduct
+ - symbol: BRepGraph_DefsShellOfSolid
+ - symbol: BRepGraph_DefsSolidOfCompSolid
+ - symbol: BRepGraph_DefsVertexOfFace
+ - symbol: BRepGraph_DefsWireOfFace
+ - symbol: BRepGraph_EdgeId
+ - symbol: BRepGraph_EdgesOfVertex
+ - symbol: BRepGraph_EditorView
+ - symbol: BRepGraph_FaceId
+ - symbol: BRepGraph_FaceRefId
+ - symbol: BRepGraph_FacesOfEdge
+ - symbol: BRepGraph_FullChildRefIterator
+ - symbol: BRepGraph_FullCoEdgeRefIterator
+ - symbol: BRepGraph_FullFaceRefIterator
+ - symbol: BRepGraph_FullOccurrenceRefIterator
+ - symbol: BRepGraph_FullShellRefIterator
+ - symbol: BRepGraph_FullSolidRefIterator
+ - symbol: BRepGraph_FullVertexRefIterator
+ - symbol: BRepGraph_FullWireRefIterator
+ - symbol: BRepGraph_History
+ - symbol: BRepGraph_HistoryRecord
+ - symbol: BRepGraph_Layer
+ - symbol: BRepGraph_LayerIterator
+ - symbol: BRepGraph_LayerParam
+ - symbol: BRepGraph_LayerParam_VertexParams
+ - symbol: BRepGraph_LayerRegistry
+ - symbol: BRepGraph_LayerRegularity
+ - symbol: BRepGraph_LayerRegularity_EdgeRegularities
+ - symbol: BRepGraph_MeshCacheStorage
+ - symbol: BRepGraph_MeshCache_CoEdgeMeshEntry
+ - symbol: BRepGraph_MeshCache_EdgeMeshEntry
+ - symbol: BRepGraph_MeshCache_FaceMeshEntry
+ - symbol: BRepGraph_MeshView
+ - symbol: BRepGraph_MeshView_CoEdgeOps
+ - symbol: BRepGraph_MeshView_EdgeOps
+ - symbol: BRepGraph_MeshView_FaceOps
+ - symbol: BRepGraph_MeshView_PolyOps
+ - symbol: BRepGraph_NodeId
+ - symbol: BRepGraph_OccurrenceId
+ - symbol: BRepGraph_OccurrenceRefId
+ - symbol: BRepGraph_OccurrencesOfProduct
+ - symbol: BRepGraph_ParallelPolicy
+ - symbol: BRepGraph_ParentExplorer
+ - symbol: BRepGraph_Polygon2DRepId
+ - symbol: BRepGraph_Polygon3DRepId
+ - symbol: BRepGraph_PolygonOnTriRepId
+ - symbol: BRepGraph_ProductId
+ - symbol: BRepGraph_RefId
+ - symbol: BRepGraph_RefTransientCache
+ - symbol: BRepGraph_RefUID
+ - symbol: BRepGraph_RefsChildOfCompound
+ - symbol: BRepGraph_RefsChildOfShell
+ - symbol: BRepGraph_RefsChildOfSolid
+ - symbol: BRepGraph_RefsCoEdgeOfWire
+ - symbol: BRepGraph_RefsCompSolidsOfSolid
+ - symbol: BRepGraph_RefsCompoundsOfChild
+ - symbol: BRepGraph_RefsEdgesOfVertex
+ - symbol: BRepGraph_RefsFaceOfShell
+ - symbol: BRepGraph_RefsFacesOfWire
+ - symbol: BRepGraph_RefsIterator_ChildOfCompoundTraits
+ - symbol: BRepGraph_RefsIterator_ChildOfShellTraits
+ - symbol: BRepGraph_RefsIterator_ChildOfSolidTraits
+ - symbol: BRepGraph_RefsIterator_CoEdgeOfWireTraits
+ - symbol: BRepGraph_RefsIterator_FaceOfShellTraits
+ - symbol: BRepGraph_RefsIterator_OccurrenceOfProductTraits
+ - symbol: BRepGraph_RefsIterator_RefsVertexOfEdge
+ - symbol: BRepGraph_RefsIterator_ShellOfSolidTraits
+ - symbol: BRepGraph_RefsIterator_SolidOfCompSolidTraits
+ - symbol: BRepGraph_RefsIterator_VertexOfFaceTraits
+ - symbol: BRepGraph_RefsIterator_WireOfFaceTraits
+ - symbol: BRepGraph_RefsOccurrenceOfProduct
+ - symbol: BRepGraph_RefsProductsOfOccurrence
+ - symbol: BRepGraph_RefsShellOfSolid
+ - symbol: BRepGraph_RefsShellsOfFace
+ - symbol: BRepGraph_RefsSolidOfCompSolid
+ - symbol: BRepGraph_RefsSolidsOfShell
+ - symbol: BRepGraph_RefsVertexOfFace
+ - symbol: BRepGraph_RefsView
+ - symbol: BRepGraph_RefsView_ChildOps
+ - symbol: BRepGraph_RefsView_CoEdgeOps
+ - symbol: BRepGraph_RefsView_FaceOps
+ - symbol: BRepGraph_RefsView_OccurrenceOps
+ - symbol: BRepGraph_RefsView_ShellOps
+ - symbol: BRepGraph_RefsView_SolidOps
+ - symbol: BRepGraph_RefsView_VertexOps
+ - symbol: BRepGraph_RefsView_WireOps
+ - symbol: BRepGraph_RefsWireOfFace
+ - symbol: BRepGraph_RefsWiresOfCoEdge
+ - symbol: BRepGraph_RelatedIterator
+ - symbol: BRepGraph_RepId
+ - symbol: BRepGraph_ReverseIterator_CompSolidOfSolidRefTraits
+ - symbol: BRepGraph_ReverseIterator_CompoundOfChildRefTraits
+ - symbol: BRepGraph_ReverseIterator_EdgeOfVertexRefTraits
+ - symbol: BRepGraph_ReverseIterator_FaceOfWireRefTraits
+ - symbol: BRepGraph_ReverseIterator_ProductOfOccurrenceRefTraits
+ - symbol: BRepGraph_ReverseIterator_ShellOfFaceRefTraits
+ - symbol: BRepGraph_ReverseIterator_SolidOfShellRefTraits
+ - symbol: BRepGraph_ReverseIterator_WireOfCoEdgeRefTraits
+ - symbol: BRepGraph_RootProductIterator
+ - symbol: BRepGraph_ShapesView
+ - symbol: BRepGraph_ShellId
+ - symbol: BRepGraph_ShellRefId
+ - symbol: BRepGraph_ShellsOfFace
+ - symbol: BRepGraph_SolidId
+ - symbol: BRepGraph_SolidRefId
+ - symbol: BRepGraph_SolidsOfShell
+ - symbol: BRepGraph_SurfaceRepId
+ - symbol: BRepGraph_Tool
+ - symbol: BRepGraph_Tool_CoEdge
+ - symbol: BRepGraph_Tool_Edge
+ - symbol: BRepGraph_Tool_Face
+ - symbol: BRepGraph_Tool_Mesh
+ - symbol: BRepGraph_Tool_Shell
+ - symbol: BRepGraph_Tool_Vertex
+ - symbol: BRepGraph_Tool_Wire
+ - symbol: BRepGraph_TopoView
+ - symbol: BRepGraph_TopoView_CoEdgeOps
+ - symbol: BRepGraph_TopoView_CompSolidOps
+ - symbol: BRepGraph_TopoView_CompoundOps
+ - symbol: BRepGraph_TopoView_EdgeOps
+ - symbol: BRepGraph_TopoView_FaceOps
+ - symbol: BRepGraph_TopoView_GenOps
+ - symbol: BRepGraph_TopoView_GeometryOps
+ - symbol: BRepGraph_TopoView_OccurrenceOps
+ - symbol: BRepGraph_TopoView_ProductOps
+ - symbol: BRepGraph_TopoView_ShellOps
+ - symbol: BRepGraph_TopoView_SolidOps
+ - symbol: BRepGraph_TopoView_VertexOps
+ - symbol: BRepGraph_TopoView_WireOps
+ - symbol: BRepGraph_Transform
+ - symbol: BRepGraph_TransientCache
+ - symbol: BRepGraph_TriangulationRepId
+ - symbol: BRepGraph_UID
+ - symbol: BRepGraph_UIDsView
+ - symbol: BRepGraph_Validate
+ - symbol: BRepGraph_Validate_Options
+ - symbol: BRepGraph_Validate_Result
+ - symbol: BRepGraph_VersionStamp
+ - symbol: BRepGraph_VertexId
+ - symbol: BRepGraph_VertexRefId
+ - symbol: BRepGraph_WireExplorer
+ - symbol: BRepGraph_WireId
+ - symbol: BRepGraph_WireRefId
+ - symbol: BRepGraph_WiresOfCoEdge
+ - symbol: BRepIntCurveSurface_Inter
+ - symbol: BRepLProp
+ - symbol: BRepLProp_CLProps
+ - symbol: BRepLProp_SLProps
+ - symbol: BRepLProp_SurfaceTool
+ - symbol: BRepLib
+ - symbol: BRepLib_CheckCurveOnSurface
+ - symbol: BRepLib_Command
+ - symbol: BRepLib_EdgeError
+ - symbol: BRepLib_FaceError
+ - symbol: BRepLib_FindSurface
+ - symbol: BRepLib_FuseEdges
+ - symbol: BRepLib_MakeEdge
+ - symbol: BRepLib_MakeEdge2d
+ - symbol: BRepLib_MakeFace
+ - symbol: BRepLib_MakePolygon
+ - symbol: BRepLib_MakeShape
+ - symbol: BRepLib_MakeShell
+ - symbol: BRepLib_MakeSolid
+ - symbol: BRepLib_MakeVertex
+ - symbol: BRepLib_MakeWire
+ - symbol: BRepLib_PointCloudShape
+ - symbol: BRepLib_ShapeModification
+ - symbol: BRepLib_ShellError
+ - symbol: BRepLib_ToolTriangulatedShape
+ - symbol: BRepLib_ValidateEdge
+ - symbol: BRepLib_WireError
+ - symbol: BRepMAT2d_BisectingLocus
+ - symbol: BRepMAT2d_Explorer
+ - symbol: BRepMAT2d_LinkTopoBilo
+ - symbol: BRepMesh_BaseMeshAlgo
+ - symbol: BRepMesh_BoundaryParamsRangeSplitter
+ - symbol: BRepMesh_Circle
+ - symbol: BRepMesh_CircleInspector
+ - symbol: BRepMesh_CircleTool
+ - symbol: BRepMesh_Classifier
+ - symbol: BRepMesh_ConeRangeSplitter
+ - symbol: BRepMesh_ConstrainedBaseMeshAlgo
+ - symbol: BRepMesh_Context
+ - symbol: BRepMesh_CurveTessellator
+ - symbol: BRepMesh_CustomBaseMeshAlgo
+ - symbol: BRepMesh_CylinderRangeSplitter
+ - symbol: BRepMesh_DataStructureOfDelaun
+ - symbol: BRepMesh_DefaultRangeSplitter
+ - symbol: BRepMesh_Deflection
+ - symbol: BRepMesh_DegreeOfFreedom
+ - symbol: BRepMesh_DelabellaBaseMeshAlgo
+ - symbol: BRepMesh_DelabellaMeshAlgoFactory
+ - symbol: BRepMesh_DelaunayBaseMeshAlgo
+ - symbol: BRepMesh_DiscretAlgoFactory
+ - symbol: BRepMesh_DiscretFactory
+ - symbol: BRepMesh_DiscretRoot
+ - symbol: BRepMesh_Edge
+ - symbol: BRepMesh_EdgeDiscret
+ - symbol: BRepMesh_EdgeTessellationExtractor
+ - symbol: BRepMesh_ExtrusionRangeSplitter
+ - symbol: BRepMesh_FaceChecker
+ - symbol: BRepMesh_FaceDiscret
+ - symbol: BRepMesh_FastDiscret
+ - symbol: BRepMesh_GeomTool
+ - symbol: BRepMesh_IncrementalMesh
+ - symbol: BRepMesh_IncrementalMeshFactory
+ - symbol: BRepMesh_MeshAlgoFactory
+ - symbol: BRepMesh_MeshTool
+ - symbol: BRepMesh_MeshTool_NodeClassifier
+ - symbol: BRepMesh_ModelBuilder
+ - symbol: BRepMesh_ModelHealer
+ - symbol: BRepMesh_ModelPostProcessor
+ - symbol: BRepMesh_ModelPreProcessor
+ - symbol: BRepMesh_NURBSRangeSplitter
+ - symbol: BRepMesh_OrientedEdge
+ - symbol: BRepMesh_PairOfIndex
+ - symbol: BRepMesh_SelectorOfDataStructureOfDelaun
+ - symbol: BRepMesh_ShapeTool
+ - symbol: BRepMesh_ShapeVisitor
+ - symbol: BRepMesh_SphereRangeSplitter
+ - symbol: BRepMesh_TorusRangeSplitter
+ - symbol: BRepMesh_Triangulator
+ - symbol: BRepMesh_UVParamRangeSplitter
+ - symbol: BRepMesh_UndefinedRangeSplitter
+ - symbol: BRepMesh_Vertex
+ - symbol: BRepMesh_VertexInspector
+ - symbol: BRepMesh_VertexTool
+ - symbol: BRepOffsetAPI_DraftAngle
+ - symbol: BRepOffsetAPI_MakeDraft
+ - symbol: BRepOffsetAPI_MakeEvolved
+ - symbol: BRepOffsetAPI_MakeFilling
+ - symbol: BRepOffsetAPI_MakeOffset
+ - symbol: BRepOffsetAPI_MakeOffsetShape
+ - symbol: BRepOffsetAPI_MakePipe
+ - symbol: BRepOffsetAPI_MakePipeShell
+ - symbol: BRepOffsetAPI_MakeThickSolid
+ - symbol: BRepOffsetAPI_MiddlePath
+ - symbol: BRepOffsetAPI_NormalProjection
+ - symbol: BRepOffsetAPI_ThruSections
+ - symbol: BRepOffsetSimple_Status
+ - symbol: BRepOffset_Analyse
+ - symbol: BRepOffset_Error
+ - symbol: BRepOffset_Inter2d
+ - symbol: BRepOffset_Inter3d
+ - symbol: BRepOffset_Interval
+ - symbol: BRepOffset_MakeLoops
+ - symbol: BRepOffset_MakeSimpleOffset
+ - symbol: BRepOffset_Mode
+ - symbol: BRepOffset_Offset
+ - symbol: BRepOffset_SimpleOffset
+ - symbol: BRepOffset_Status
+ - symbol: BRepPreviewAPI_MakeBox
+ - symbol: BRepPrimAPI_MakeBox
+ - symbol: BRepPrimAPI_MakeCone
+ - symbol: BRepPrimAPI_MakeCylinder
+ - symbol: BRepPrimAPI_MakeHalfSpace
+ - symbol: BRepPrimAPI_MakeOneAxis
+ - symbol: BRepPrimAPI_MakePrism
+ - symbol: BRepPrimAPI_MakeRevol
+ - symbol: BRepPrimAPI_MakeRevolution
+ - symbol: BRepPrimAPI_MakeSphere
+ - symbol: BRepPrimAPI_MakeSweep
+ - symbol: BRepPrimAPI_MakeTorus
+ - symbol: BRepPrimAPI_MakeWedge
+ - symbol: BRepPrim_Builder
+ - symbol: BRepPrim_Cone
+ - symbol: BRepPrim_Cylinder
+ - symbol: BRepPrim_Direction
+ - symbol: BRepPrim_FaceBuilder
+ - symbol: BRepPrim_GWedge
+ - symbol: BRepPrim_OneAxis
+ - symbol: BRepPrim_Revolution
+ - symbol: BRepPrim_Sphere
+ - symbol: BRepPrim_Torus
+ - symbol: BRepPrim_Wedge
+ - symbol: BRepProj_Projection
+ - symbol: BRepSweep_Builder
+ - symbol: BRepSweep_Iterator
+ - symbol: BRepSweep_NumLinearRegularSweep
+ - symbol: BRepSweep_Prism
+ - symbol: BRepSweep_Revol
+ - symbol: BRepSweep_Rotation
+ - symbol: BRepSweep_Tool
+ - symbol: BRepSweep_Translation
+ - symbol: BRepSweep_Trsf
+ - symbol: BRepToIGESBRep_Entity
+ - symbol: BRepToIGES_BREntity
+ - symbol: BRepToIGES_BRShell
+ - symbol: BRepToIGES_BRSolid
+ - symbol: BRepToIGES_BRWire
+ - symbol: BRepTools
+ - symbol: BRepTools_CopyModification
+ - symbol: BRepTools_GTrsfModification
+ - symbol: BRepTools_History
+ - symbol: BRepTools_Modification
+ - symbol: BRepTools_Modifier
+ - symbol: BRepTools_NurbsConvertModification
+ - symbol: BRepTools_PurgeLocations
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+ - symbol: gp_Mat
+ - symbol: gp_Mat2d
+ - symbol: gp_Parab
+ - symbol: gp_Parab2d
+ - symbol: gp_Pln
+ - symbol: gp_Pnt
+ - symbol: gp_Pnt2d
+ - symbol: gp_Quaternion
+ - symbol: gp_QuaternionNLerp
+ - symbol: gp_QuaternionSLerp
+ - symbol: gp_Sphere
+ - symbol: gp_Torus
+ - symbol: gp_Trsf
+ - symbol: gp_Trsf2d
+ - symbol: gp_TrsfForm
+ - symbol: gp_Vec
+ - symbol: gp_Vec2d
+ - symbol: gp_XY
+ - symbol: gp_XYZ
+ - symbol: math
+ - symbol: math_BFGS
+ - symbol: math_BissecNewton
+ - symbol: math_BracketMinimum
+ - symbol: math_BracketedRoot
+ - symbol: math_BrentMinimum
+ - symbol: math_BullardGenerator
+ - symbol: math_ComputeGaussPointsAndWeights
+ - symbol: math_ComputeKronrodPointsAndWeights
+ - symbol: math_Crout
+ - symbol: math_DirectPolynomialRoots
+ - symbol: math_DoubleTab
+ - symbol: math_EigenValuesSearcher
+ - symbol: math_FRPR
+ - symbol: math_Function
+ - symbol: math_FunctionAllRoots
+ - symbol: math_FunctionRoot
+ - symbol: math_FunctionRoots
+ - symbol: math_FunctionSample
+ - symbol: math_FunctionSet
+ - symbol: math_FunctionSetRoot
+ - symbol: math_FunctionSetWithDerivatives
+ - symbol: math_FunctionWithDerivative
+ - symbol: math_Gauss
+ - symbol: math_GaussLeastSquare
+ - symbol: math_GaussMultipleIntegration
+ - symbol: math_GaussSetIntegration
+ - symbol: math_GaussSingleIntegration
+ - symbol: math_GlobOptMin
+ - symbol: math_Jacobi
+ - symbol: math_KronrodSingleIntegration
+ - symbol: math_Matrix
+ - symbol: math_MultipleVarFunction
+ - symbol: math_MultipleVarFunctionWithGradient
+ - symbol: math_MultipleVarFunctionWithHessian
+ - symbol: math_NewtonFunctionRoot
+ - symbol: math_NotSquare
+ - symbol: math_PSO
+ - symbol: math_PSOParticlesPool
+ - symbol: math_Powell
+ - symbol: math_SVD
+ - symbol: math_SingularMatrix
+ - symbol: math_Status
+ - symbol: math_TrigonometricEquationFunction
+ - symbol: math_TrigonometricFunctionRoots
+ - symbol: math_Uzawa
+ - symbol: math_ValueAndWeight
+ additionalBindCode: |
+ #include
+ #include
+ #include
+ #include
+ #include
+ #include
+ #include
+ #include
+ #include
+ #include
+ #include
+ #include
+ struct TopoDS_Cast {};
+ using namespace emscripten;
+ EMSCRIPTEN_BINDINGS(ocjs_additional) {
+ function("FairCurve_Batten_Compute", optional_override([](FairCurve_Batten& self, int nbIter, double tol) -> int {
+ FairCurve_AnalysisCode code;
+ self.Compute(code, nbIter, tol);
+ return static_cast(code);
+ }));
+ function("FairCurve_MinimalVariation_Compute", optional_override([](FairCurve_MinimalVariation& self, int nbIter, double tol) -> int {
+ FairCurve_AnalysisCode code;
+ self.Compute(code, nbIter, tol);
+ return static_cast(code);
+ }));
+ class_("TopoDS_Cast")
+ .class_function("Edge", optional_override([](const TopoDS_Shape& s) -> TopoDS_Edge { return TopoDS::Edge(s); }))
+ .class_function("Wire", optional_override([](const TopoDS_Shape& s) -> TopoDS_Wire { return TopoDS::Wire(s); }))
+ .class_function("Face", optional_override([](const TopoDS_Shape& s) -> TopoDS_Face { return TopoDS::Face(s); }))
+ .class_function("Vertex", optional_override([](const TopoDS_Shape& s) -> TopoDS_Vertex { return TopoDS::Vertex(s); }))
+ .class_function("Shell", optional_override([](const TopoDS_Shape& s) -> TopoDS_Shell { return TopoDS::Shell(s); }))
+ .class_function("Solid", optional_override([](const TopoDS_Shape& s) -> TopoDS_Solid { return TopoDS::Solid(s); }))
+ .class_function("Compound", optional_override([](const TopoDS_Shape& s) -> TopoDS_Compound { return TopoDS::Compound(s); }))
+ ;
+ }
+ emccFlags:
+ - -fwasm-exceptions
+ - -sEXPORT_EXCEPTION_HANDLING_HELPERS
+ - -sEXPORT_ES6=1
+ - -sMODULARIZE
+ - -sALLOW_MEMORY_GROWTH=1
+ - -sEXPORTED_RUNTIME_METHODS=["FS"]
+ - -sINITIAL_MEMORY=128MB
+ - -sMAXIMUM_MEMORY=4GB
+ - -sUSE_FREETYPE=1
+ - -sERROR_ON_UNDEFINED_SYMBOLS=0
+ - --no-entry
+ - -Wl,--allow-undefined
+ - --emit-symbol-map
+ - -sSTACK_SIZE=8388608
+ - -sWASM_BIGINT
+ - -msimd128
+ - -O3
+ # ── Multi-threading additions (delta from full.yml) ─────────────
+ # Recipe: docs-site/content/docs/package/guides/multi-threading.mdx (published /multi subpath).
+ # -sEVAL_CTORS=2 (present in full.yml) is DROPPED -- ctor evaluation
+ # order is non-deterministic under pthread workers.
+ - -pthread
+ - -sUSE_PTHREADS=1
+ # Pre-spawn one worker per logical CPU on the host. The expression is evaluated by the
+ # generated JS glue at module-instantiation time, so a single binary adapts to whatever
+ # hardware loads it. See BENCHMARKS.md — Impact of R1 (PTHREAD_POOL_SIZE bump).
+ - -sPTHREAD_POOL_SIZE=navigator.hardwareConcurrency
+ - -sSHARED_MEMORY=1
+ # R12 — browser-only ENVIRONMENT (no `node`). Node.js lacks
+ # `WebAssembly.Memory.prototype.toResizableBuffer()` (May 2026), so the
+ # generated JS glue for -sGROWABLE_ARRAYBUFFERS=1 below throws on
+ # module init under Node. Stripping `node` from ENVIRONMENT makes that
+ # incompatibility explicit at build time.
+ - -sENVIRONMENT=web,worker
+ # R12 — enable resizable SharedArrayBuffer views so consumers can hoist
+ # HEAP* references out of hot loops without re-fetching them after
+ # every growth event. Eliminates the `-Wpthreads-mem-growth` advisory.
+ # Requires Chrome/Edge >= 144, Firefox >= 145, Safari >= 26.2.
+ # See `full_multi_browser.yml` header for the full support matrix.
+ - -sGROWABLE_ARRAYBUFFERS=1
diff --git a/build-configs/link-filter-poc.yml b/build-configs/link-filter-poc.yml
new file mode 100644
index 00000000..ead9320b
--- /dev/null
+++ b/build-configs/link-filter-poc.yml
@@ -0,0 +1,69 @@
+# build-configs/link-filter-poc.yml
+#
+# 22-symbol replicad-like trim — smoke YAML for docker.yml CI.
+#
+# Refreshed against OCCT V8 per the production-readiness blueprint:
+# docs/research/ocjs-docker-production-readiness-blueprint.md
+# (Appendix: link-filter-poc.yml Refresh Procedure)
+#
+# Source of truth: tests/sentinel/test_link_filter_poc_yaml.py::POC_YAML_SCOPE.
+# The sentinel reachability test (test_link_ncollection_reachability.py) MAY
+# reference a wider superset (`_REPLICAD_LIKE_SCOPE`) for filter-completeness
+# assertions, but this YAML MUST remain at exactly 22 symbols to keep CI smoke
+# link time bounded. The drift-prevention test in tests/sentinel/ enforces this.
+#
+# Category coverage (6 OCCT subsystems × 22 symbols):
+# Standard : 2
+# gp : 6
+# TopoDS : 8
+# BRepPrimAPI : 2
+# BRepBuilderAPI : 3
+# Bnd : 1
+mainBuild:
+ name: opencascade_linkfilter_poc.js
+ bindings:
+ # Standard infra (2)
+ - symbol: Standard_Transient
+ - symbol: Standard_Type
+ # gp (6)
+ - symbol: gp_Pnt
+ - symbol: gp_Vec
+ - symbol: gp_Dir
+ - symbol: gp_Trsf
+ - symbol: gp_Ax2
+ - symbol: gp_XYZ
+ # TopoDS (8)
+ - symbol: TopoDS
+ - symbol: TopoDS_Shape
+ - symbol: TopoDS_Edge
+ - symbol: TopoDS_Wire
+ - symbol: TopoDS_Face
+ - symbol: TopoDS_Solid
+ - symbol: TopoDS_Compound
+ - symbol: TopoDS_Iterator
+ # BRepPrimAPI (2)
+ - symbol: BRepPrimAPI_MakeBox
+ - symbol: BRepPrimAPI_MakeSphere
+ # BRepBuilderAPI (3)
+ - symbol: BRepBuilderAPI_MakeEdge
+ - symbol: BRepBuilderAPI_MakeFace
+ - symbol: BRepBuilderAPI_MakeWire
+ # Bnd (1)
+ - symbol: Bnd_Box
+ emccFlags:
+ - -fwasm-exceptions
+ - -sEXPORT_EXCEPTION_HANDLING_HELPERS
+ - -sEXPORT_ES6=1
+ - -sMODULARIZE
+ - -sALLOW_MEMORY_GROWTH=1
+ - -sEXPORTED_RUNTIME_METHODS=["FS"]
+ - -sINITIAL_MEMORY=64MB
+ - -sMAXIMUM_MEMORY=2GB
+ - -sERROR_ON_UNDEFINED_SYMBOLS=0
+ - --no-entry
+ - -Wl,--allow-undefined
+ - --emit-symbol-map
+ - -sSTACK_SIZE=8388608
+ - -sWASM_BIGINT
+ - -msimd128
+ - -O3
diff --git a/build-native.sh b/build-native.sh
new file mode 100755
index 00000000..2bd02dc6
--- /dev/null
+++ b/build-native.sh
@@ -0,0 +1,66 @@
+#!/bin/bash
+set -euo pipefail
+cd "$(dirname "$0")"
+
+echo "=== OpenCascade.js Native Build ==="
+
+# Shared emsdk with assimpjs
+export EMSDK="${EMSDK:-$(cd ../assimpjs/emsdk && pwd)}"
+echo "Using EMSDK: $EMSDK"
+source "$EMSDK/emsdk_env.sh"
+echo "Emscripten: $(emcc --version | head -1)"
+
+# Dependency roots
+export OCJS_ROOT="$(pwd)"
+export OCCT_ROOT="${OCCT_ROOT:-$(cd ../OCCT && pwd)}"
+export RAPIDJSON_ROOT="${RAPIDJSON_ROOT:-$(cd ../rapidjson && pwd)}"
+export FREETYPE_ROOT="${FREETYPE_ROOT:-$(cd ../freetype && pwd)}"
+
+# Dev build flags: -O0 and no LTO for fast iteration
+export OCJS_OPT="${OCJS_OPT:--O0}"
+export OCJS_LTO="${OCJS_LTO:-0}"
+
+echo "OCJS_ROOT: $OCJS_ROOT"
+echo "OCCT_ROOT: $OCCT_ROOT"
+echo "RAPIDJSON_ROOT: $RAPIDJSON_ROOT"
+echo "FREETYPE_ROOT: $FREETYPE_ROOT"
+echo "OCJS_OPT: $OCJS_OPT"
+echo "OCJS_LTO: $OCJS_LTO"
+echo ""
+
+# Ensure build directories exist
+mkdir -p build/{bindings,sources,dist}
+
+# Step 1: Apply OCCT patches
+echo "=== Step 1: Applying patches ==="
+python3 src/patches/patch_using_statements.py
+
+# Step 2: Build flat includes + PCH (25x compilation speedup)
+echo "=== Step 2: Building flat includes + precompiled header ==="
+python3 -c "
+import sys; sys.path.insert(0, 'src')
+from ocjs_bindgen.config.paths import buildFlatIncludes, buildPch
+buildFlatIncludes()
+buildPch()
+"
+
+# Step 3: Generate bindings
+echo "=== Step 3: Generating bindings ==="
+python3 -m ocjs_bindgen --config bindgen-filters.yaml
+
+# Step 4: Compile bindings (uses PCH + flat includes)
+echo "=== Step 4: Compiling bindings ==="
+python3 src/compileBindings.py single-threaded
+
+# Step 5: Compile OCCT sources via CMake (replaces legacy src/compileSources.py)
+echo "=== Step 5: Compiling OCCT sources (CMake) ==="
+./build-wasm.sh sources
+
+echo ""
+echo "=== Build complete ==="
+echo "Run 'PYTHONPATH=src python3 -m ocjs_bindgen.link.yaml_build ' to link into final WASM."
+echo ""
+echo "Build optimization summary:"
+echo " - Flat includes: 467 -I paths -> 1 (eliminates stat() overhead)"
+echo " - PCH: 5,640 headers precompiled once (~92MB binary)"
+echo " - Combined: ~25x per-file speedup (52s -> 2s per binding file)"
diff --git a/build-wasm.sh b/build-wasm.sh
new file mode 100755
index 00000000..0bb643b6
--- /dev/null
+++ b/build-wasm.sh
@@ -0,0 +1,1029 @@
+#!/bin/bash
+set -euo pipefail
+
+# ── OpenCascade.js WASM Build Script ─────────────────────────────────
+#
+# Single entry point for all build operations: PCH rebuild, binding
+# compilation, source compilation, and final WASM linking.
+# Includes config-keyed compilation caching and provenance tracking.
+#
+# Usage:
+# ./build-wasm.sh link # Link only (fastest, reuses .o)
+# ./build-wasm.sh pch # Rebuild flat includes + PCH
+# ./build-wasm.sh pch link # Rebuild PCH then link
+# ./build-wasm.sh generate # Generate binding .cpp files from OCCT headers
+# ./build-wasm.sh bindings # Compile bindings only
+# ./build-wasm.sh sources # Compile OCCT sources only
+# ./build-wasm.sh full # Full pipeline: pch + generate + bindings + sources + link
+# ./build-wasm.sh --config single-threaded full # Full pipeline with named configuration
+#
+# Environment overrides (all optional, sensible defaults provided):
+# EMSDK Path to emsdk (default: deps/emsdk/)
+# OCCT_ROOT Path to OCCT source (default: deps/OCCT/)
+# RAPIDJSON_ROOT Path to rapidjson (default: deps/rapidjson/)
+# FREETYPE_ROOT Path to freetype (default: ./freetype)
+# OCJS_OPT Compile optimization level (default: -O2)
+# OCJS_EXTRA_CFLAGS Extra compile flags appended to C/CXX flags (e.g. "-mllvm -inline-threshold=128")
+# OCJS_LTO Enable LTO at compile time: 0|1 (default: 1)
+# OCJS_EXCEPTIONS Enable native WASM exceptions: 0|1 (default: 0)
+# THREADING Threading mode: single-threaded|multi-threaded (default: single-threaded)
+#
+# Examples:
+# # Production single build (-O2 compile, noLTO)
+# OCJS_LTO=0 ./build-wasm.sh full build-configs/full.yml
+#
+# # Quick rebuild after changing filterPackages.py
+# ./build-wasm.sh pch link build-configs/full.yml
+#
+# # Dev build (fast compile, no LTO)
+# OCJS_OPT=-O0 OCJS_LTO=0 ./build-wasm.sh link custom_build.yml
+#
+# # Use named configuration
+# ./build-wasm.sh --config single-threaded full consumer.yml
+# ─────────────────────────────────────────────────────────────────────
+
+SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd)"
+cd "$SCRIPT_DIR"
+
+# ── Help ─────────────────────────────────────────────────────────────
+
+show_help() {
+ cat << 'HELPEOF'
+Usage: ./build-wasm.sh [options] []
+
+Commands:
+ full Full pipeline: apply-patches + pch + generate + bindings + sources + bind-symbols + link
+ apply-patches Apply OCCT source patches (idempotent — all 4 OCCT patches + libembind patch are hard requirements)
+ link Link only (reuses compiled .o files, fastest)
+ bind-symbols Extract Embind registrations to build/additional-bind-symbols.json (run before link)
+ pch Rebuild flat includes + precompiled header
+ generate Generate binding .cpp files from OCCT headers
+ bindings Compile bindings only
+ sources Compile OCCT sources only
+ validate Validate YAML config without building
+ clean-generated Remove all generated .d.ts.json and .cpp files (handles symlinks)
+ clean-objects Remove all compiled .o files from compiled-bindings/ (handles symlinks)
+
+Options:
+ --help Show this help message
+ --config Apply a named configuration from build-configs/configurations.json
+
+Environment Variables:
+ EMSDK Path to Emscripten SDK (default: deps/emsdk/)
+ OCCT_ROOT Path to OCCT source (default: deps/OCCT/)
+ RAPIDJSON_ROOT Path to rapidjson (default: deps/rapidjson/)
+ FREETYPE_ROOT Path to freetype (default: deps/freetype/)
+ OCJS_CONFIG Named configuration (alternative to --config flag)
+ OCJS_OPT Optimization level: -O0, -O2, -O3, -Os, -Oz (default: -O2)
+ OCJS_EXTRA_CFLAGS Extra compile flags (e.g. "-mllvm -inline-threshold=128")
+ OCJS_LTO Enable LTO: 0|1 (default: 0)
+ OCJS_EXCEPTIONS Native WASM exceptions: 0|1 (default: 0)
+ THREADING Threading mode: single-threaded|multi-threaded (default: single-threaded)
+ OCJS_STRICT_DEPS Fail on dependency commit mismatch: 0|1 (default: 0)
+ OCJS_FORCE_GENERATE Force regeneration of all bindings: 0|1 (default: 0)
+
+Examples:
+ # Full build with a named configuration
+ ./build-wasm.sh --config single-threaded full build-configs/full.yml
+
+ # Link only with consumer YAML (reuses compile cache)
+ ./build-wasm.sh --config single-threaded link path/to/consumer.yml
+
+ # Override a flag from the config
+ OCJS_WASM_OPT_LEVEL=-O4 ./build-wasm.sh --config single-threaded full consumer.yml
+
+ # Raw env vars, no config (backward compat)
+ OCJS_OPT=-O3 OCJS_LTO=0 ./build-wasm.sh full build-configs/full.yml
+
+ # Validate config without building
+ ./build-wasm.sh validate build-configs/full.yml
+HELPEOF
+ exit 0
+}
+
+if [ "${1:-}" = "--help" ] || [ "${1:-}" = "-h" ]; then
+ show_help
+fi
+
+# (cache-list and cache-gc removed -- caching is managed by Nx)
+
+_resolve_symlink_target() {
+ local path="$1"
+ if [ -L "$path" ]; then
+ readlink -f "$path" 2>/dev/null || readlink "$path"
+ else
+ echo "$path"
+ fi
+}
+
+_ensure_doxygen() {
+ # System-only check. The pinned-tarball download path was removed because:
+ # - The doxygen GitHub release only ships an x86_64 Linux tarball.
+ # - On arm64 Linux (Docker Desktop on Apple Silicon, GitHub Actions
+ # ubuntu-24.04-arm, etc.) the binary fails to execute, then
+ # extract-docs.py silently fell back to system doxygen anyway —
+ # producing host-vs-container JSDoc divergence with no diagnostic.
+ # The OCCT XML extraction is stable across Doxygen 1.9.x through 1.16.x,
+ # so we accept whatever the system provides. On arm64, verify the binary is
+ # executable (not merely present on disk) before preferring the pinned copy —
+ # see extract-docs.py doxygen resolution logic.
+ # arm64 doxygen must be executable, not merely present on disk.
+ if ! command -v doxygen >/dev/null 2>&1; then
+ cat >&2 <<'EOF'
+ERROR: doxygen not installed.
+ Linux : apt-get install -y doxygen (Ubuntu 22.04 ships 1.9.1+, 24.04 ships 1.10.x)
+ macOS : brew install doxygen (Homebrew ships 1.14.x)
+ Other : https://www.doxygen.nl/manual/install.html
+This project no longer ships a pinned doxygen binary because upstream does
+not publish arm64-linux releases. The generated JSDoc is functionally
+identical across doxygen 1.9.x through 1.16.x for the OCCT corpus.
+EOF
+ return 1
+ fi
+ echo " Using system Doxygen $(doxygen --version 2>/dev/null | awk '{print $1}')"
+}
+
+if [ "${1:-}" = "clean-generated" ]; then
+ echo "Cleaning generated .d.ts.json and .cpp files..."
+ target="$(_resolve_symlink_target "$SCRIPT_DIR/build/bindings")"
+ if [ -d "$target" ]; then
+ count=$(find "$target" \( -name "*.d.ts.json" -o \( -name "*.cpp" ! -name "*.cpp.o" \) \) | wc -l | tr -d ' ')
+ find "$target" -name "*.d.ts.json" -delete 2>/dev/null || true
+ find "$target" -name "*.cpp" ! -name "*.cpp.o" -delete 2>/dev/null || true
+ rm -f "$SCRIPT_DIR/build/bindings/.generator-hash" 2>/dev/null || true
+ echo " Removed $count generated files."
+ else
+ echo " No build/bindings directory found."
+ fi
+ echo "Done. Run 'generate' to regenerate."
+ exit 0
+fi
+
+if [ "${1:-}" = "clean-objects" ]; then
+ echo "Cleaning compiled .o files..."
+ target="$SCRIPT_DIR/build/compiled-bindings"
+ if [ -d "$target" ]; then
+ count=$(find "$target" -name "*.cpp.o" | wc -l | tr -d ' ')
+ rm -rf "$target"
+ echo " Removed $count object files from compiled-bindings/."
+ else
+ echo " No build/compiled-bindings directory found."
+ fi
+ # Also clean legacy .cpp.o from build/bindings/ if present
+ legacy="$(_resolve_symlink_target "$SCRIPT_DIR/build/bindings")"
+ if [ -d "$legacy" ]; then
+ legacy_count=$(find "$legacy" -name "*.cpp.o" 2>/dev/null | wc -l | tr -d ' ')
+ if [ "$legacy_count" -gt 0 ]; then
+ find "$legacy" -name "*.cpp.o" -delete 2>/dev/null || true
+ echo " Removed $legacy_count legacy object files from bindings/."
+ fi
+ fi
+ echo "Done. Run 'bindings' to recompile."
+ exit 0
+fi
+
+# ── Resolve paths ────────────────────────────────────────────────────
+
+if [ -z "${EMSDK:-}" ] || [ ! -d "${EMSDK:-}" ]; then
+ if [ -d "$SCRIPT_DIR/deps/emsdk" ]; then
+ export EMSDK="$SCRIPT_DIR/deps/emsdk"
+ elif [ -d "$SCRIPT_DIR/../assimpjs/emsdk" ]; then
+ export EMSDK="$(cd "$SCRIPT_DIR/../assimpjs/emsdk" && pwd)"
+ else
+ echo "ERROR: EMSDK not found. Run scripts/clone-deps.sh or set EMSDK=" >&2
+ exit 1
+ fi
+fi
+source "$EMSDK/emsdk_env.sh" 2>/dev/null
+
+# Project-local Python venv is the canonical interpreter for every build script.
+# Python 3.14 project-local venv for bindgen (see pyproject.toml).
+export OCJS_PYTHON="$SCRIPT_DIR/.venv/bin/python"
+if [ ! -x "$OCJS_PYTHON" ]; then
+ echo "ERROR: $OCJS_PYTHON not found. Run scripts/clone-deps.sh first." >&2
+ exit 1
+fi
+
+export OCJS_ROOT="$SCRIPT_DIR"
+export OCCT_ROOT="${OCCT_ROOT:-$(cd "$SCRIPT_DIR/deps/OCCT" 2>/dev/null && pwd || { cd "$SCRIPT_DIR/../OCCT" 2>/dev/null && pwd; } || echo "")}"
+export RAPIDJSON_ROOT="${RAPIDJSON_ROOT:-$(cd "$SCRIPT_DIR/deps/rapidjson" 2>/dev/null && pwd || { cd "$SCRIPT_DIR/../rapidjson" 2>/dev/null && pwd; } || echo "$SCRIPT_DIR/rapidjson")}"
+export FREETYPE_ROOT="${FREETYPE_ROOT:-$(cd "$SCRIPT_DIR/deps/freetype" 2>/dev/null && pwd || { cd "$SCRIPT_DIR/../freetype" 2>/dev/null && pwd; } || echo "$SCRIPT_DIR/freetype")}"
+
+for dep_name in OCCT_ROOT RAPIDJSON_ROOT FREETYPE_ROOT; do
+ dep_val="${!dep_name}"
+ if [ -z "$dep_val" ] || [ ! -d "$dep_val" ]; then
+ echo "ERROR: $dep_name not found at '$dep_val'" >&2
+ exit 1
+ fi
+done
+
+# ── Validate dependency commits against DEPS.json ────────────────────
+
+DEPS_FILE="$SCRIPT_DIR/DEPS.json"
+if [ -f "$DEPS_FILE" ]; then
+ "$OCJS_PYTHON" -c "
+import json, subprocess, os, sys
+deps = json.load(open('$DEPS_FILE'))['dependencies']
+checks = [
+ ('occt', os.environ.get('OCCT_ROOT', '')),
+ ('rapidjson', os.environ.get('RAPIDJSON_ROOT', '')),
+ ('freetype', os.environ.get('FREETYPE_ROOT', '')),
+]
+warnings = []
+for name, path in checks:
+ if not path or not os.path.isdir(os.path.join(path, '.git')):
+ continue
+ expected = deps[name]['commit']
+ actual = subprocess.check_output(['git', '-C', path, 'rev-parse', 'HEAD'], text=True).strip()
+ if actual != expected:
+ warnings.append(f' {name}: expected {expected[:12]}, got {actual[:12]}')
+if warnings:
+ print('WARNING: Dependency commit mismatch (vs DEPS.json):', file=sys.stderr)
+ for w in warnings:
+ print(w, file=sys.stderr)
+ if os.environ.get('OCJS_STRICT_DEPS', '') == '1':
+ print('ERROR: --strict deps check failed. Set OCJS_STRICT_DEPS=0 to override.', file=sys.stderr)
+ sys.exit(1)
+" || true
+fi
+
+# ── Pre-scan for --config flag ────────────────────────────────────────
+
+_prescan_args=("$@")
+for (( _i=0; _i<${#_prescan_args[@]}; _i++ )); do
+ if [ "${_prescan_args[$_i]}" = "--config" ] && [ $((_i+1)) -lt ${#_prescan_args[@]} ]; then
+ export OCJS_CONFIG="${_prescan_args[$((_i+1))]}"
+ break
+ fi
+done
+
+# OCJS_CONFIG inheritance contract (R6 / W1 fix) — cached Nx subtasks
+# (`apply-patches`, `pch`, `generate`, `compile-bindings`, `compile-sources`,
+# `link`) all declare `{ "env": "OCJS_CONFIG" }` in their `inputs` so the
+# cache key bifurcates on the named configuration. That means a parent
+# `OCJS_CONFIG=multi-threaded nx run ocjs:link` will NOT reuse a
+# single-threaded `pch` cache entry. Within this script we simply
+# inherit whatever the parent process exported; the explicit `:-` default
+# only fires on direct CLI invocation, not on the Nx-driven path.
+#
+# To override:
+# OCJS_CONFIG=multi-threaded ./build-wasm.sh link
+# ./build-wasm.sh --config multi-threaded link
+#
+# To inspect:
+# echo "$OCJS_CONFIG" # current named configuration
+# cat build-configs/configurations.json | jq 'keys' # available configurations
+export OCJS_CONFIG="${OCJS_CONFIG:-single-threaded}"
+
+if [ -n "${OCJS_CONFIG:-}" ]; then
+ _CONFIG_FILE="$SCRIPT_DIR/build-configs/configurations.json"
+ if [ ! -f "$_CONFIG_FILE" ]; then
+ echo "ERROR: configurations.json not found at $_CONFIG_FILE" >&2
+ exit 1
+ fi
+ echo "Loading configuration: $OCJS_CONFIG"
+ eval "$("$OCJS_PYTHON" -c "
+import json, sys
+configs = json.load(open('$_CONFIG_FILE'))
+name = '$OCJS_CONFIG'
+if name not in configs:
+ print(f'echo \"ERROR: Configuration \"{name}\" not found. Available: {\", \".join(configs.keys())}\" >&2; exit 1')
+ sys.exit(0)
+cfg = configs[name]
+for key, val in cfg.items():
+ print(f'export {key}=\"{val}\"')
+")"
+ echo ""
+fi
+
+# ── Build flags ──────────────────────────────────────────────────────
+
+export OCJS_OPT="${OCJS_OPT:--O3}"
+export OCJS_EXTRA_CFLAGS="${OCJS_EXTRA_CFLAGS:-}"
+export OCJS_LTO="${OCJS_LTO:-0}"
+export OCJS_EXCEPTIONS="${OCJS_EXCEPTIONS:-0}"
+export OCJS_WASM_OPT_LEVEL="${OCJS_WASM_OPT_LEVEL:--O4}"
+export OCJS_CLOSURE="${OCJS_CLOSURE:-false}"
+export OCJS_EVAL_CTORS="${OCJS_EVAL_CTORS:-false}"
+export OCJS_CONVERGE="${OCJS_CONVERGE:-false}"
+export OCJS_DEFINES="${OCJS_DEFINES:-}"
+export OCJS_UNDEFINES="${OCJS_UNDEFINES:-}"
+export OCJS_SIMD="${OCJS_SIMD:-0}"
+export OCJS_RELAXED_SIMD="${OCJS_RELAXED_SIMD:-0}"
+export OCJS_BIGINT="${OCJS_BIGINT:-0}"
+export OCJS_MALLOC="${OCJS_MALLOC:-dlmalloc}"
+export OCJS_FORCE_GENERATE="${OCJS_FORCE_GENERATE:-0}"
+export THREADING="${THREADING:-single-threaded}"
+export PYTHONPATH="$OCJS_ROOT/src:${PYTHONPATH:-}"
+export BUILD_DIR="${BUILD_DIR:-$OCJS_ROOT/build}"
+OCJS_OUTPUT_DIR="${OCJS_OUTPUT_DIR:-$OCJS_ROOT/dist}"
+if [[ "$OCJS_OUTPUT_DIR" != /* ]]; then
+ OCJS_OUTPUT_DIR="$OCJS_ROOT/$OCJS_OUTPUT_DIR"
+fi
+export OCJS_OUTPUT_DIR
+
+# ── Print config ─────────────────────────────────────────────────────
+
+echo "╔══════════════════════════════════════════════════════════╗"
+echo "║ OpenCascade.js WASM Build ║"
+echo "╠══════════════════════════════════════════════════════════╣"
+printf "║ %-14s %s\n" "EMSDK:" "$EMSDK ║"
+printf "║ %-14s %s\n" "Emscripten:" "$(emcc --version 2>/dev/null | head -1) ║"
+printf "║ %-14s %s\n" "OCCT_ROOT:" "$OCCT_ROOT ║"
+printf "║ %-14s %s\n" "OCJS_OPT:" "$OCJS_OPT ║"
+if [ -n "$OCJS_EXTRA_CFLAGS" ]; then
+printf "║ %-14s %s\n" "EXTRA_CFLAGS:" "$OCJS_EXTRA_CFLAGS ║"
+fi
+printf "║ %-14s %s\n" "OCJS_LTO:" "$OCJS_LTO ║"
+printf "║ %-14s %s\n" "OCJS_EXCEPTIONS:" "$OCJS_EXCEPTIONS ║"
+printf "║ %-14s %s\n" "OCJS_SIMD:" "$OCJS_SIMD ║"
+printf "║ %-14s %s\n" "OCJS_RELAXED_SIMD:" "$OCJS_RELAXED_SIMD ║"
+printf "║ %-14s %s\n" "THREADING:" "$THREADING ║"
+printf "║ %-14s %s\n" "OCJS_MALLOC:" "$OCJS_MALLOC ║"
+printf "║ %-14s %s\n" "wasm-opt:" "$OCJS_WASM_OPT_LEVEL ║"
+printf "║ %-14s %s\n" "BUILD_DIR:" "$BUILD_DIR ║"
+printf "║ %-14s %s\n" "OCJS_CONFIG:" "${OCJS_CONFIG:-} ║"
+echo "╚══════════════════════════════════════════════════════════╝"
+echo ""
+
+mkdir -p "$BUILD_DIR"/{bindings,sources}
+mkdir -p "$OCJS_OUTPUT_DIR"
+
+# ── Build flag validation ─────────────────────────────────────────────
+
+validate_build_flags() {
+ "$OCJS_PYTHON" -c "
+import sys; sys.path.insert(0, 'src')
+from ocjs_bindgen.config.flags import validate_build_flags, BuildFlagMismatch
+try:
+ validate_build_flags()
+except BuildFlagMismatch as e:
+ print(str(e), flush=True)
+ sys.exit(1)
+"
+}
+
+# ── Step functions ───────────────────────────────────────────────────
+
+_ensure_standard_version_hxx() {
+ local target="$OCCT_ROOT/src/FoundationClasses/TKernel/Standard/Standard_Version.hxx"
+ local template="$OCCT_ROOT/adm/templates/Standard_Version.hxx.in"
+ if [ -f "$target" ]; then
+ return 0
+ fi
+ if [ ! -f "$template" ]; then
+ echo " WARNING: Standard_Version.hxx.in template not found" >&2
+ return 0
+ fi
+ echo " Generating Standard_Version.hxx from cmake template..."
+ "$OCJS_PYTHON" -c "
+import re
+with open('$template') as f: c = f.read()
+with open('$OCCT_ROOT/adm/cmake/version.cmake') as f: v = f.read()
+major = re.search(r'OCC_VERSION_MAJOR\s+(\d+)', v).group(1)
+minor = re.search(r'OCC_VERSION_MINOR\s+(\d+)', v).group(1)
+maint = re.search(r'OCC_VERSION_MAINTENANCE\s+(\d+)', v).group(1)
+c = c.replace('@OCC_VERSION_MAJOR@', major)
+c = c.replace('@OCC_VERSION_MINOR@', minor)
+c = c.replace('@OCC_VERSION_MAINTENANCE@', maint)
+c = c.replace('@OCC_VERSION_DATE@', '2024-01-01')
+c = c.replace('@SET_OCC_VERSION_DEVELOPMENT@', '#define OCC_VERSION_DEVELOPMENT \"dev\"')
+with open('$target', 'w') as f: f.write(c)
+print(f' Generated Standard_Version.hxx (OCCT {major}.{minor}.{maint})')
+"
+}
+
+step_pch() {
+ echo "═══ Rebuilding flat includes + PCH ═══"
+ _ensure_standard_version_hxx
+ rm -f build/pch.h.pch build/pch.h
+ rm -rf build/occt-includes
+ "$OCJS_PYTHON" -c "
+import sys; sys.path.insert(0, 'src')
+from ocjs_bindgen.config.paths import buildFlatIncludes, buildPch
+buildFlatIncludes()
+buildPch(threading='$THREADING')
+"
+ echo ""
+}
+
+step_docs() {
+ echo "═══ Generating OCCT documentation JSON ═══"
+ _ensure_doxygen
+ "$OCJS_PYTHON" src/extract-docs.py
+ echo ""
+}
+
+step_generate() {
+ echo "═══ Generating bindings from OCCT headers ═══"
+
+ step_docs
+
+ find "$OCJS_ROOT/src" -type d -name "__pycache__" -exec rm -rf {} + 2>/dev/null || true
+
+ if [ "${OCJS_FORCE_GENERATE:-0}" = "1" ]; then
+ echo " Force regeneration: clearing existing .d.ts.json and .cpp files"
+ local target="$OCJS_ROOT/build/bindings"
+ [ -L "$target" ] && target="$(readlink -f "$target")"
+ if [ -d "$target" ]; then
+ find "$target" -name "*.d.ts.json" -delete 2>/dev/null || true
+ find "$target" -name "*.cpp" ! -name "*.cpp.o" -delete 2>/dev/null || true
+ rm -f "$OCJS_ROOT/build/bindings/.generator-hash" 2>/dev/null || true
+ fi
+ fi
+
+ local config="${OCJS_BINDGEN_CONFIG:-$OCJS_ROOT/bindgen-filters.yaml}"
+ if [ -f "$config" ]; then
+ echo " Using bindgen config: $config"
+ export OCJS_BINDGEN_CONFIG="$config"
+ fi
+ "$OCJS_PYTHON" -m ocjs_bindgen --config "$config"
+ echo ""
+}
+
+step_bindings() {
+ echo "═══ Compiling bindings ═══"
+ "$OCJS_PYTHON" src/compileBindings.py "$THREADING"
+ echo ""
+}
+
+step_sources() {
+ echo "═══ Compiling OCCT sources (CMake) ═══"
+ step_sources_cmake
+ echo ""
+}
+
+step_sources_cmake() {
+ local cmake_build_dir="$OCJS_ROOT/build/occt-cmake"
+ local lib_dir="$cmake_build_dir/lin32/clang/lib"
+
+ if [ -d "$lib_dir" ] && [ "$(ls "$lib_dir"/*.a 2>/dev/null | wc -l)" -gt 0 ]; then
+ echo " CMake build directory exists with $(ls "$lib_dir"/*.a | wc -l | tr -d ' ') libraries, checking if rebuild needed..."
+ fi
+
+ local cmake_flags=(
+ -DCMAKE_BUILD_TYPE=Release
+ -DBUILD_LIBRARY_TYPE=Static
+ -DBUILD_MODULE_FoundationClasses=ON
+ -DBUILD_MODULE_ModelingData=ON
+ -DBUILD_MODULE_ModelingAlgorithms=ON
+ -DBUILD_MODULE_DataExchange=ON
+ -DBUILD_MODULE_ApplicationFramework=ON
+ -DBUILD_MODULE_Visualization=OFF
+ -DBUILD_MODULE_Draw=OFF
+ -DBUILD_DOC_Overview=OFF
+ -DUSE_TCL=OFF
+ -DUSE_TK=OFF
+ -DUSE_RAPIDJSON=ON
+ "-D3RDPARTY_RAPIDJSON_DIR=$RAPIDJSON_ROOT"
+ "-D3RDPARTY_RAPIDJSON_INCLUDE_DIR=$RAPIDJSON_ROOT/include"
+ "-D3RDPARTY_FREETYPE_DIR=$FREETYPE_ROOT"
+ "-D3RDPARTY_FREETYPE_INCLUDE_DIR_freetype2=$FREETYPE_ROOT/include"
+ "-D3RDPARTY_FREETYPE_INCLUDE_DIR_ft2build=$FREETYPE_ROOT/include"
+ )
+
+ local cflags="$OCJS_OPT -DIGNORE_NO_ATOMICS=1 -DOCCT_NO_PLUGINS -DHAVE_RAPIDJSON"
+ local cxxflags="$cflags -frtti"
+
+ if [ "$OCJS_LTO" = "1" ]; then
+ cflags="$cflags -flto"
+ cxxflags="$cxxflags -flto"
+ fi
+
+ if [ "$OCJS_EXCEPTIONS" = "1" ]; then
+ if [ "${OCJS_EH_MODE:-wasm}" = "js" ]; then
+ cxxflags="$cxxflags -fexceptions"
+ else
+ cxxflags="$cxxflags -fwasm-exceptions"
+ fi
+ cxxflags="$cxxflags -DOCJS_EXCEPTIONS_ENABLED=1"
+ else
+ cflags="$cflags -sSUPPORT_LONGJMP=0"
+ cxxflags="$cxxflags -sSUPPORT_LONGJMP=0"
+ fi
+
+ if [ "$OCJS_SIMD" = "1" ]; then
+ cflags="$cflags -msimd128"
+ cxxflags="$cxxflags -msimd128"
+ if [ "$OCJS_RELAXED_SIMD" = "1" ]; then
+ cflags="$cflags -mrelaxed-simd"
+ cxxflags="$cxxflags -mrelaxed-simd"
+ fi
+ fi
+
+ if [ "$THREADING" = "multi-threaded" ]; then
+ cflags="$cflags -pthread"
+ cxxflags="$cxxflags -pthread"
+ fi
+
+ if [ -n "$OCJS_DEFINES" ]; then
+ IFS=',' read -ra defines <<< "$OCJS_DEFINES"
+ for d in "${defines[@]}"; do
+ d="$(echo "$d" | xargs)"
+ [ -n "$d" ] && cflags="$cflags -D$d" && cxxflags="$cxxflags -D$d"
+ done
+ fi
+ if [ -n "$OCJS_UNDEFINES" ]; then
+ IFS=',' read -ra undefines <<< "$OCJS_UNDEFINES"
+ for u in "${undefines[@]}"; do
+ u="$(echo "$u" | xargs)"
+ [ -n "$u" ] && cflags="$cflags -U$u" && cxxflags="$cxxflags -U$u"
+ done
+ fi
+
+ if [ -n "$OCJS_EXTRA_CFLAGS" ]; then
+ cflags="$cflags $OCJS_EXTRA_CFLAGS"
+ cxxflags="$cxxflags $OCJS_EXTRA_CFLAGS"
+ fi
+
+ cmake_flags+=(
+ "-DCMAKE_C_FLAGS=$cflags"
+ "-DCMAKE_CXX_FLAGS=$cxxflags"
+ )
+
+ if [ "$OCJS_EXCEPTIONS" != "1" ]; then
+ cmake_flags+=(
+ "-DCMAKE_C_FLAGS_RELEASE=-DNDEBUG -sDISABLE_EXCEPTION_CATCHING=1 -sSUPPORT_LONGJMP=0 -UOCC_CONVERT_SIGNALS"
+ "-DCMAKE_CXX_FLAGS_RELEASE=-DNDEBUG -sDISABLE_EXCEPTION_CATCHING=1 -sSUPPORT_LONGJMP=0 -UOCC_CONVERT_SIGNALS"
+ )
+ fi
+
+ echo " Configuring OCCT via CMake..."
+ emcmake cmake -B "$cmake_build_dir" \
+ "${cmake_flags[@]}" \
+ -Wno-dev \
+ "$OCCT_ROOT" 2>&1 | tail -5
+
+ local nproc
+ nproc=$(sysctl -n hw.ncpu 2>/dev/null || nproc 2>/dev/null || echo 4)
+ echo " Building OCCT with $nproc parallel jobs..."
+ cmake --build "$cmake_build_dir" -j"$nproc" 2>&1 | tail -5
+
+ local lib_count
+ lib_count=$(ls "$lib_dir"/*.a 2>/dev/null | wc -l | tr -d ' ')
+ echo " CMake produced $lib_count static libraries in $lib_dir"
+
+ echo "$lib_dir" > "$OCJS_ROOT/build/.cmake-lib-dir"
+}
+
+step_dts() {
+ local yaml="$1"
+ if [ ! -f "$yaml" ]; then
+ echo "ERROR: YAML config not found: $yaml" >&2
+ exit 1
+ fi
+ local yaml_abs
+ yaml_abs="$(cd "$(dirname "$yaml")" && pwd)/$(basename "$yaml")"
+ echo "═══ Regenerating .d.ts from $yaml_abs (no compile/link) ═══"
+ cd "$(dirname "$yaml_abs")"
+ PYTHONPATH="$OCJS_ROOT/src" "$OCJS_PYTHON" -m ocjs_bindgen.link.yaml_build --dts-only "$(basename "$yaml_abs")"
+ cd "$SCRIPT_DIR"
+ echo ""
+}
+
+step_bind_symbols() {
+ local yaml="$1"
+ if [ ! -f "$yaml" ]; then
+ echo "ERROR: YAML config not found: $yaml" >&2
+ exit 1
+ fi
+ local yaml_abs
+ yaml_abs="$(cd "$(dirname "$yaml")" && pwd)/$(basename "$yaml")"
+ echo "═══ Extracting Embind registration manifest from $yaml_abs ═══"
+ # Dedicated NX-graph stage between `generate` and `link` — writes
+ # `build/additional-bind-symbols.json` so the link-time `verifyBindings`
+ # consumer (and the post-link `validate-build.py` consumer) can both
+ # resolve Embind builtins without depending on the link stage having
+ # opened libclang first. NX `link.dependsOn` ordering enforces the
+ # producer/consumer contract; running this manually is fine too (e.g.
+ # for local diagnostics or smoke-test driven invocations).
+ PYTHONPATH="$OCJS_ROOT/src" "$OCJS_PYTHON" -m ocjs_bindgen.bind_symbols \
+ --build-dir "$BUILD_DIR" "$yaml_abs"
+ echo ""
+}
+
+step_link() {
+ local yaml="$1"
+ if [ ! -f "$yaml" ]; then
+ echo "ERROR: YAML config not found: $yaml" >&2
+ exit 1
+ fi
+ local yaml_abs
+ yaml_abs="$(cd "$(dirname "$yaml")" && pwd)/$(basename "$yaml")"
+ echo "═══ Linking WASM from $yaml_abs ═══"
+ echo " Output dir: $OCJS_OUTPUT_DIR"
+ mkdir -p "$OCJS_OUTPUT_DIR"
+ # Scope cleanup to the current build's name so multi-config workflows
+ # (e.g. single-threaded + multi-threaded coexisting in dist/) don't wipe
+ # the other config's artefacts. The build name lives at `mainBuild.name`
+ # in the YAML (always the first `name:` field at column 0+2 indentation).
+ local build_js build_base
+ build_js=$(awk '$1 == "name:" {print $2; exit}' "$yaml_abs")
+ if [ -z "$build_js" ]; then
+ echo "ERROR: could not parse mainBuild.name from $yaml_abs" >&2
+ exit 1
+ fi
+ build_base="${build_js%.js}"
+ find "$OCJS_OUTPUT_DIR" -maxdepth 1 \( \
+ -name "${build_base}.wasm" \
+ -o -name "${build_js}" \
+ -o -name "${build_base}.d.ts" \
+ -o -name "${build_base}.js.symbols" \
+ -o -name "${build_base}.provenance.json" \
+ -o -name "${build_base}.build-manifest.json" \
+ \) -delete 2>/dev/null || true
+ cd "$OCJS_OUTPUT_DIR"
+ PYTHONPATH="$OCJS_ROOT/src" "$OCJS_PYTHON" -m ocjs_bindgen.link.yaml_build "$yaml_abs"
+ cd "$SCRIPT_DIR"
+ echo ""
+}
+
+step_apply_patches() {
+ # The four OCCT source patches below are HARD REQUIREMENTS for every
+ # supported build (single-threaded and multi-threaded alike). The legacy
+ # OCJS_PATCH_DUMP / OCJS_PATCH_STEPCAF env-var toggles were removed —
+ # making required behaviour optional was a footgun (a `OCJS_PATCH_DUMP=false`
+ # build silently produces an unusable WASM that fails at link or at runtime
+ # depending on which symbols the consumer pulls in).
+ echo "═══ Applying OCCT source patches ═══"
+
+ if [ -d "$OCCT_ROOT/.git" ]; then
+ echo " Reverting OCCT source tree to clean state..."
+ git -C "$OCCT_ROOT" checkout -- . 2>/dev/null || true
+ fi
+
+ echo " Applying using-statement / V8 bugfix patches..."
+ "$OCJS_PYTHON" src/patches/patch_using_statements.py
+ echo " Applying Standard_Dump stub patch..."
+ "$OCJS_PYTHON" src/patches/patch_standard_dump.py
+ echo " Applying noexcept destructors patch (7 classes)..."
+ "$OCJS_PYTHON" src/patches/patch_noexcept_destructors.py
+ echo " Applying STEPCAFControl_Controller DynamicType patch..."
+ "$OCJS_PYTHON" src/patches/patch_stepcaf_dyntype.py
+ echo " All patches applied."
+
+ step_patch_embind
+
+ echo "$(date +%s)" > "$BUILD_DIR/patches-applied"
+ echo ""
+}
+
+step_patch_embind() {
+ # Patch-hygiene contract (see docs/policy/ocjs-trailing-default-emission-policy.md
+ # rule 6 and docs/research/ocjs-libembind-phase-0-hygiene.md). On EVERY
+ # invocation we:
+ # 1. Verify the vendored pristine snapshot at
+ # src/vendor/pristine-libembind.js matches its expected SHA256.
+ # 2. Reset deps/emsdk/upstream/emscripten/src/lib/libembind.js from the
+ # pristine snapshot (overwriting any prior patched / hot-edited state).
+ # 3. Apply src/patches/libembind-overloading.patch.
+ # 4. Verify the patched file's SHA256 matches the expected hash recorded
+ # at src/patches/libembind-overloading.expected.sha256.
+ #
+ # The prior hash-skip + reverse-apply scheme accumulated five duplicate
+ # `$getSignature` definitions across iterative patch revisions because JS
+ # object-literal duplicate-key semantics silently kept only the last copy,
+ # producing non-deterministic dispatch behaviour across machines. The
+ # pristine-reset + hash-verify pipeline makes the step idempotent at the
+ # file level (not merely at the patch-hash level) and fails loudly if
+ # either the pristine snapshot or the post-patch result drifts.
+ echo "═══ Patching emsdk libembind.js (type-based overload dispatch) ═══"
+
+ local embind_dir="$EMSDK/upstream/emscripten"
+ local embind_file="$embind_dir/src/lib/libembind.js"
+ local patch_file="$OCJS_ROOT/src/patches/libembind-overloading.patch"
+ local pristine_file="$OCJS_ROOT/src/vendor/pristine-libembind.js"
+ local pristine_hash_file="$OCJS_ROOT/src/vendor/pristine-libembind.expected.sha256"
+ local expected_hash_file="$OCJS_ROOT/src/patches/libembind-overloading.expected.sha256"
+
+ if [ ! -d "$embind_dir" ]; then
+ echo "ERROR: emscripten directory not found at $embind_dir" >&2
+ exit 1
+ fi
+ if [ ! -f "$pristine_file" ]; then
+ echo "ERROR: pristine libembind snapshot not found at $pristine_file" >&2
+ echo " Re-fetch from https://raw.githubusercontent.com/emscripten-core/emscripten//src/lib/libembind.js" >&2
+ exit 1
+ fi
+ if [ ! -f "$patch_file" ]; then
+ echo "ERROR: patch file not found at $patch_file" >&2
+ exit 1
+ fi
+
+ local emsdk_version
+ emsdk_version="$(cat "$embind_dir/emscripten-version.txt" 2>/dev/null | tr -d '"' | tr -d '[:space:]')"
+ if [ "$emsdk_version" != "5.0.1" ]; then
+ echo "WARNING: libembind patch was created for emsdk 5.0.1 but found $emsdk_version" >&2
+ echo " The patch may fail or produce incorrect results." >&2
+ fi
+
+ _sha256() {
+ if command -v shasum >/dev/null 2>&1; then
+ shasum -a 256 "$1" | awk '{print $1}'
+ else
+ sha256sum "$1" | awk '{print $1}'
+ fi
+ }
+
+ if [ -f "$pristine_hash_file" ]; then
+ local pristine_actual pristine_expected
+ pristine_actual="$(_sha256 "$pristine_file")"
+ pristine_expected="$(cat "$pristine_hash_file" | tr -d '[:space:]')"
+ if [ "$pristine_actual" != "$pristine_expected" ]; then
+ echo "ERROR: pristine snapshot SHA256 mismatch." >&2
+ echo " file: $pristine_file" >&2
+ echo " expected: $pristine_expected" >&2
+ echo " actual: $pristine_actual" >&2
+ exit 1
+ fi
+ fi
+
+ echo " Resetting libembind.js from pristine snapshot..."
+ mkdir -p "$(dirname "$embind_file")"
+ cp "$pristine_file" "$embind_file"
+ local reset_actual reset_expected
+ reset_actual="$(_sha256 "$embind_file")"
+ reset_expected="$(_sha256 "$pristine_file")"
+ if [ "$reset_actual" != "$reset_expected" ]; then
+ echo "ERROR: post-reset SHA256 mismatch (copy failed or destination tampered with)." >&2
+ exit 1
+ fi
+
+ echo " Applying libembind-overloading.patch..."
+ cd "$embind_dir" || exit 1
+ if ! patch -p0 -N --no-backup-if-mismatch < "$patch_file"; then
+ patch_status=$?
+ echo "ERROR: libembind patch failed (exit $patch_status) against pristine snapshot." >&2
+ echo " Pristine SHA256: $reset_actual" >&2
+ echo " Patch file: $patch_file" >&2
+ exit 1
+ fi
+ cd "$OCJS_ROOT" || exit 1
+
+ local patched_actual
+ patched_actual="$(_sha256 "$embind_file")"
+ if [ -f "$expected_hash_file" ]; then
+ local patched_expected
+ patched_expected="$(cat "$expected_hash_file" | tr -d '[:space:]')"
+ if [ "$patched_actual" != "$patched_expected" ]; then
+ echo "ERROR: post-patch SHA256 mismatch." >&2
+ echo " file: $embind_file" >&2
+ echo " expected: $patched_expected (from $expected_hash_file)" >&2
+ echo " actual: $patched_actual" >&2
+ echo " Regenerate via:" >&2
+ echo " cp ; patch -p0 < $patch_file" >&2
+ echo " shasum -a 256 | awk '{print \$1}' > $expected_hash_file" >&2
+ exit 1
+ fi
+ else
+ echo " WARNING: expected hash file not found at $expected_hash_file" >&2
+ echo " Skipping post-patch hash verification (run once and seed the hash)." >&2
+ fi
+
+ # Retain the hash-stamp file purely for diagnostic visibility — the
+ # decision to reset+reapply no longer depends on it (we ALWAYS reset).
+ echo "$patched_actual" > "$BUILD_DIR/embind-patch-hash"
+ echo " libembind.js patched successfully (sha256 $patched_actual)."
+}
+
+# (step_compile_all removed -- Nx manages task orchestration and caching)
+
+# ── Parse commands ───────────────────────────────────────────────────
+
+if [ $# -eq 0 ]; then
+ echo "Usage: $0 [...] []"
+ echo ""
+ echo "Commands:"
+ echo " apply-patches Apply OCCT source patches (idempotent)"
+ echo " pch Rebuild flat includes + PCH"
+ echo " docs Generate OCCT documentation JSON (for JSDoc)"
+ echo " generate Generate binding .cpp files from OCCT headers"
+ echo " bindings Compile bindings only"
+ echo " sources Compile OCCT sources only"
+ echo " dts Regenerate .d.ts only from existing fragments (no compile/link)"
+ echo " bind-symbols Extract Embind registrations -> build/additional-bind-symbols.json"
+ echo " link Link WASM binary from YAML config"
+ echo " full Full pipeline (apply-patches + pch + generate + bindings + sources + link)"
+ echo " clean-generated Remove generated .d.ts.json and .cpp (handles symlinks)"
+ echo " clean-objects Remove compiled .o files from compiled-bindings/ (handles symlinks)"
+ exit 1
+fi
+
+YAML_CONFIG=""
+COMMANDS=()
+
+while [ $# -gt 0 ]; do
+ case "$1" in
+ --help|-h)
+ show_help
+ ;;
+ --config)
+ shift
+ if [ $# -eq 0 ]; then
+ echo "ERROR: --config requires a configuration name" >&2
+ exit 1
+ fi
+ export OCJS_CONFIG="$1"
+ shift
+ ;;
+ pch|docs|generate|bindings|sources|apply-patches|patch-embind)
+ COMMANDS+=("$1")
+ shift
+ ;;
+ validate)
+ COMMANDS+=("$1")
+ shift
+ if [ $# -eq 0 ]; then
+ echo "ERROR: validate requires a YAML config path argument" >&2
+ exit 1
+ fi
+ YAML_CONFIG="$(cd "$(dirname "$1")" && pwd)/$(basename "$1")"
+ shift
+ ;;
+ dts|link|full|provenance|bind-symbols)
+ COMMANDS+=("$1")
+ shift
+ if [ $# -eq 0 ]; then
+ echo "ERROR: command requires a YAML config path argument" >&2
+ exit 1
+ fi
+ YAML_CONFIG="$(cd "$(dirname "$1")" && pwd)/$(basename "$1")"
+ shift
+ ;;
+ *)
+ if [ -f "$1" ] && [[ "$1" == *.yml ]]; then
+ YAML_CONFIG="$(cd "$(dirname "$1")" && pwd)/$(basename "$1")"
+ shift
+ else
+ echo "ERROR: Unknown command or file: $1" >&2
+ echo "Run './build-wasm.sh --help' for usage." >&2
+ exit 1
+ fi
+ ;;
+ esac
+done
+
+START_TIME=$(date +%s)
+
+for cmd in "${COMMANDS[@]}"; do
+ case "$cmd" in
+ apply-patches) step_apply_patches ;;
+ patch-embind) step_patch_embind ;;
+ pch) step_pch ;;
+ docs) step_docs ;;
+ generate) step_generate ;;
+ bindings) validate_build_flags && step_bindings ;;
+ sources) step_sources ;;
+ dts) step_dts "$YAML_CONFIG" ;;
+ bind-symbols) step_bind_symbols "$YAML_CONFIG" ;;
+ link)
+ # `link` must be self-contained when invoked as the Docker
+ # ENTRYPOINT — no separate `provenance`/`validate` runs precede
+ # it. `provenance.py init` seeds `build/provenance.json` so the
+ # `prov.add_linking(...)` call inside `step_link` (which guards
+ # on `_load()` returning a non-empty dict) actually records the
+ # link section; the end-of-script `finalize` then promotes the
+ # scratchpad to `/.provenance.json`.
+ # `validate-build.py` writes the companion `.build-manifest.json`
+ # so CI smoke + downstream consumers (replicad, examples) can
+ # round-trip the build-flag fingerprint without reaching back
+ # into the build cache.
+ validate_build_flags
+ "$OCJS_PYTHON" "$OCJS_ROOT/src/provenance.py" init
+ # V3 RE-SHIP: extract Embind registrations into
+ # `build/additional-bind-symbols.json` BEFORE `step_link` runs the
+ # link-time `verifyBindings` consumer. NX's own dep-graph enforces
+ # this ordering when invoked via `nx run`; the shell entry mirrors
+ # the contract for direct `./build-wasm.sh link ` invocations
+ # so the producer never lags its consumer.
+ step_bind_symbols "$YAML_CONFIG"
+ step_link "$YAML_CONFIG"
+ echo "═══ Post-link validation ═══"
+ # V10 — unconditional hard-fail. Alias-resolved + builtin buckets
+ # absorb every historical false positive in validate-build.py; any
+ # surviving failure is a real link gap and must fail the wrapper.
+ "$OCJS_PYTHON" "$OCJS_ROOT/scripts/validate-build.py" "$YAML_CONFIG" "$OCJS_OUTPUT_DIR" --build-dir "$BUILD_DIR"
+ echo ""
+ ;;
+ validate)
+ echo "═══ Validating YAML config: $YAML_CONFIG ═══"
+ "$OCJS_PYTHON" -c "
+import yaml, sys
+sys.path.insert(0, '$OCJS_ROOT/src')
+from cerberus import Validator
+schema = eval(open('$OCJS_ROOT/src/customBuildSchema.py').read())
+config = yaml.safe_load(open('$YAML_CONFIG'))
+v = Validator(schema)
+if v.validate(config, schema):
+ normalized = v.normalized(config)
+ bindings = normalized['mainBuild']['bindings']
+ name = normalized['mainBuild']['name']
+ flags = normalized['mainBuild'].get('emccFlags', [])
+ print(f' Config valid: {len(bindings)} bindings')
+ print(f' Build name: {name}')
+ print(f' emccFlags: {len(flags)} flags')
+ has_exc = any('-fexceptions' in f or '-fwasm-exceptions' in f for f in flags)
+ has_exc_str = 'yes' if has_exc else 'no'
+ print(f' Exceptions: {has_exc_str}')
+else:
+ print(f' INVALID: {v.errors}', file=sys.stderr)
+ sys.exit(1)
+"
+ echo ""
+ ;;
+ provenance)
+ # V5 RE-SHIP — preserve the scratchpad written by the prior `link`
+ # subcommand. Calling `provenance.py init` here wiped the
+ # `linking{}`, `postProcessing{}`, and `nCollectionManifest{}`
+ # blocks `step_link` populates via `prov.add_linking(...)`; the
+ # subsequent `finalize` then promoted the *empty* scratchpad to
+ # `/.provenance.json`, dropping every link-time
+ # fact downstream consumers (audit doc V5/V9 contracts,
+ # `test_provenance_carries_ncollection_manifest_with_invariant`)
+ # depend on. The NX task graph guarantees `link` runs first
+ # (`provenance` `dependsOn: ["link"]`), so the scratchpad
+ # already exists when this subcommand fires — `init` only re-
+ # seeded for standalone CLI use, which we now serve by having
+ # `finalize` no-op cleanly when the scratchpad is absent.
+ echo "═══ Generating build provenance ═══"
+ "$OCJS_PYTHON" src/provenance.py finalize --wasm-dir "$OCJS_OUTPUT_DIR" --yaml "${YAML_CONFIG:-}" --duration 0
+ echo ""
+ ;;
+ full)
+ # Same self-contained-`init` contract as `link` (see comment
+ # there). Without it, `prov.add_linking(...)` inside `step_link`
+ # silently no-ops and the end-of-script `finalize` writes
+ # nothing — published artefacts only had a `.provenance.json`
+ # because the host NX pipeline ran the `provenance` subcommand
+ # in a separate invocation beforehand.
+ "$OCJS_PYTHON" "$OCJS_ROOT/src/provenance.py" init
+ step_apply_patches
+ step_pch
+ step_generate
+ step_bindings
+ step_sources_cmake
+ # Same producer-before-consumer contract as the `link` subcommand —
+ # see comment there for full rationale.
+ step_bind_symbols "$YAML_CONFIG"
+ step_link "$YAML_CONFIG"
+ echo "═══ Post-build validation ═══"
+ # V10 — unconditional hard-fail. See `link` subcommand for rationale.
+ "$OCJS_PYTHON" "$OCJS_ROOT/scripts/validate-build.py" "$YAML_CONFIG" "$OCJS_OUTPUT_DIR" --build-dir "$BUILD_DIR"
+ echo ""
+ ;;
+ esac
+done
+
+END_TIME=$(date +%s)
+ELAPSED=$((END_TIME - START_TIME))
+
+# ── Finalize provenance ──────────────────────────────────────────────
+#
+# Promotes the `build/provenance.json` scratchpad seeded by `init` (in
+# either `link` or `full`) and updated by `step_link` (`add_linking`)
+# into `/.provenance.json`. Stderr is no longer
+# suppressed — when finalize fails (missing scratchpad, unwritable
+# output dir, etc.) it now surfaces instead of silently dropping the
+# artefact and tripping the CI smoke `Assert smoke artefacts present`
+# step later. `|| true` is retained so non-YAML-driven commands
+# (`pch`, `apply-patches`, `bindings`) that legitimately have nothing
+# to finalize don't fail the wrapper.
+
+if [ -n "$YAML_CONFIG" ]; then
+ "$OCJS_PYTHON" src/provenance.py finalize --wasm-dir "$OCJS_OUTPUT_DIR" --yaml "$YAML_CONFIG" --duration "$ELAPSED" || true
+fi
+
+echo ""
+echo "╔══════════════════════════════════════════════════════════╗"
+echo "║ Build Complete ║"
+echo "╠══════════════════════════════════════════════════════════╣"
+printf "║ %-14s %s\n" "Duration:" "${ELAPSED}s ║"
+printf "║ %-14s %s\n" "Config:" "${OCJS_CONFIG:-} ║"
+
+if [ -n "$YAML_CONFIG" ]; then
+ for wasm in "$OCJS_OUTPUT_DIR"/*.wasm; do
+ if [ -f "$wasm" ]; then
+ BASENAME="$(basename "$wasm")"
+ SIZE=$(stat -f%z "$wasm" 2>/dev/null || stat -c%s "$wasm" 2>/dev/null || echo "0")
+ SIZE_MB=$(awk -v s="$SIZE" 'BEGIN { printf "%.2f", s / 1048576 }' 2>/dev/null || echo "?")
+ GZIP_SIZE=$(gzip -c "$wasm" 2>/dev/null | wc -c | tr -d ' ')
+ GZIP_MB=$(awk -v s="$GZIP_SIZE" 'BEGIN { printf "%.2f", s / 1048576 }' 2>/dev/null || echo "?")
+ printf "║ %-14s %s\n" "WASM:" "$BASENAME ($SIZE_MB MB, ${GZIP_MB} MB gzipped) ║"
+ fi
+ done
+ for js in "$OCJS_OUTPUT_DIR"/*.js; do
+ if [ -f "$js" ] && [[ "$js" != *.d.ts ]]; then
+ SIZE=$(stat -f%z "$js" 2>/dev/null || stat -c%s "$js" 2>/dev/null || echo "0")
+ SIZE_KB=$(awk -v s="$SIZE" 'BEGIN { printf "%.1f", s / 1024 }' 2>/dev/null || echo "?")
+ printf "║ %-14s %s\n" "JS:" "$(basename "$js") (${SIZE_KB} KB) ║"
+ fi
+ done
+ for dts in "$OCJS_OUTPUT_DIR"/*.d.ts; do
+ if [ -f "$dts" ]; then
+ SIZE=$(stat -f%z "$dts" 2>/dev/null || stat -c%s "$dts" 2>/dev/null || echo "0")
+ SIZE_KB=$(awk -v s="$SIZE" 'BEGIN { printf "%.1f", s / 1024 }' 2>/dev/null || echo "?")
+ printf "║ %-14s %s\n" "Types:" "$(basename "$dts") (${SIZE_KB} KB) ║"
+ fi
+ done
+fi
+echo "╚══════════════════════════════════════════════════════════╝"
diff --git a/check.ts b/check.ts
new file mode 100644
index 00000000..460d7d6e
--- /dev/null
+++ b/check.ts
@@ -0,0 +1,9 @@
+import type { OpenCascadeInstance } from './build-configs/opencascade_full.js';
+declare const oc: OpenCascadeInstance;
+declare const face: any;
+declare const loc: any;
+const triResult = oc.BRep_Tool.Triangulation(face, loc, 0);
+const tri = triResult.result;
+type TriType = typeof tri;
+const _check: TriType = tri;
+tri.isNull();
diff --git a/dist/.gitignore b/dist/.gitignore
deleted file mode 100644
index 653af8dd..00000000
--- a/dist/.gitignore
+++ /dev/null
@@ -1,6 +0,0 @@
-**
-!index.js
-!index.d.ts
-!node.js
-!node.d.ts
-!tsconfig.json
diff --git a/dist/.npmignore b/dist/.npmignore
deleted file mode 100644
index abd40ed8..00000000
--- a/dist/.npmignore
+++ /dev/null
@@ -1,2 +0,0 @@
-/reference-docs/
-/reference-docs.zip
diff --git a/dist/index.d.ts b/dist/index.d.ts
deleted file mode 100644
index 6bb23d10..00000000
--- a/dist/index.d.ts
+++ /dev/null
@@ -1,16 +0,0 @@
-import init, { OpenCascadeInstance } from "./opencascade.full";
-export * from "./opencascade.full";
-
-type OpenCascadeModuleObject = {
- [key: string]: any;
-};
-
-export default function initOpenCascade(
- settings?: {
- mainJS?: init;
- mainWasm?: string;
- worker?: string;
- libs?: string[];
- module?: OpenCascadeModuleObject;
- },
-): Promise;
diff --git a/dist/index.js b/dist/index.js
deleted file mode 100644
index 2c486b2b..00000000
--- a/dist/index.js
+++ /dev/null
@@ -1,32 +0,0 @@
-import ocFullJS from "./opencascade.full.js";
-import ocFullWasm from "./opencascade.full.wasm";
-
-const initOpenCascade = ({
- mainJS = ocFullJS,
- mainWasm = ocFullWasm,
- worker = undefined,
- libs = [],
- module = {},
-} = {}) => {
- return new Promise((resolve, reject) => {
- new mainJS({
- locateFile(path) {
- if (path.endsWith('.wasm')) {
- return mainWasm;
- }
- if (path.endsWith('.worker.js') && !!worker) {
- return worker;
- }
- return path;
- },
- ...module
- }).then(async oc => {
- for (let lib of libs) {
- await oc.loadDynamicLibrary(lib, { loadAsync: true, global: true, nodelete: true, allowUndefined: false });
- }
- resolve(oc);
- });
- });
-};
-
-export default initOpenCascade;
diff --git a/dist/node.d.ts b/dist/node.d.ts
deleted file mode 100644
index 6bb23d10..00000000
--- a/dist/node.d.ts
+++ /dev/null
@@ -1,16 +0,0 @@
-import init, { OpenCascadeInstance } from "./opencascade.full";
-export * from "./opencascade.full";
-
-type OpenCascadeModuleObject = {
- [key: string]: any;
-};
-
-export default function initOpenCascade(
- settings?: {
- mainJS?: init;
- mainWasm?: string;
- worker?: string;
- libs?: string[];
- module?: OpenCascadeModuleObject;
- },
-): Promise;
diff --git a/dist/node.js b/dist/node.js
deleted file mode 100644
index 60293b4d..00000000
--- a/dist/node.js
+++ /dev/null
@@ -1,40 +0,0 @@
-// patch __dirname
-import { dirname } from 'path';
-import { fileURLToPath } from 'url';
-globalThis.__dirname = dirname(fileURLToPath(import.meta.url));
-
-// patch require
-import { createRequire } from 'module';
-globalThis.require = createRequire(import.meta.url);
-
-import ocFullJS from "./opencascade.full.js";
-
-const initOpenCascade = ({
- mainJS = ocFullJS,
- mainWasm = `${globalThis.__dirname}/opencascade.full.wasm`,
- worker = undefined,
- libs = [],
- module = {},
-} = {}) => {
- return new Promise((resolve, reject) => {
- new mainJS({
- locateFile(path) {
- if (path.endsWith('.wasm')) {
- return mainWasm;
- }
- if (path.endsWith('.worker.js') && !!worker) {
- return worker;
- }
- return path;
- },
- ...module
- }).then(async oc => {
- for (let lib of libs) {
- await oc.loadDynamicLibrary(lib, { loadAsync: true, global: true, nodelete: true, allowUndefined: false });
- }
- resolve(oc);
- });
- });
-};
-
-export default initOpenCascade;
diff --git a/docs-site/.gitignore b/docs-site/.gitignore
new file mode 100644
index 00000000..442b66d4
--- /dev/null
+++ b/docs-site/.gitignore
@@ -0,0 +1,14 @@
+node_modules
+.next
+out
+.source
+.vercel
+.env*.local
+*.tsbuildinfo
+next-env.d.ts
+
+content/docs/package/api/**
+!content/docs/package/api/.gitkeep
+
+playwright-report
+test-results
diff --git a/docs-site/.vale.ini b/docs-site/.vale.ini
new file mode 100644
index 00000000..8064c6b5
--- /dev/null
+++ b/docs-site/.vale.ini
@@ -0,0 +1,5 @@
+StylesPath = .vale/styles
+MinAlertLevel = suggestion
+
+[*.mdx]
+BasedOnStyles = Ocjs
diff --git a/docs-site/.vale/styles/Ocjs/CondescendingFiller.yml b/docs-site/.vale/styles/Ocjs/CondescendingFiller.yml
new file mode 100644
index 00000000..49e369a0
--- /dev/null
+++ b/docs-site/.vale/styles/Ocjs/CondescendingFiller.yml
@@ -0,0 +1,10 @@
+extends: existence
+message: "Condescending filler '%s' adds no information — delete the word."
+level: error
+ignorecase: true
+tokens:
+ - '\bsimply\b'
+ - "\\bjust\\b(?!\\s+(in\\s+time|now|the))"
+ - 'as you can see'
+ - 'obviously'
+ - 'clearly[,\\s]'
diff --git a/docs-site/.vale/styles/Ocjs/NoEmojiBody.yml b/docs-site/.vale/styles/Ocjs/NoEmojiBody.yml
new file mode 100644
index 00000000..7c1db7d1
--- /dev/null
+++ b/docs-site/.vale/styles/Ocjs/NoEmojiBody.yml
@@ -0,0 +1,6 @@
+extends: existence
+message: "Emojis are reserved for the page-actions component — keep body content emoji-free."
+level: warning
+tokens:
+ - '[\x{1F300}-\x{1FAFF}]'
+ - '[\x{2600}-\x{27BF}]'
diff --git a/docs-site/.vale/styles/Ocjs/NoWelcomeTo.yml b/docs-site/.vale/styles/Ocjs/NoWelcomeTo.yml
new file mode 100644
index 00000000..0f7d4041
--- /dev/null
+++ b/docs-site/.vale/styles/Ocjs/NoWelcomeTo.yml
@@ -0,0 +1,6 @@
+extends: existence
+message: "Pages must open with a concrete sentence stating purpose, not 'Welcome to…'."
+level: error
+ignorecase: true
+tokens:
+ - '\bWelcome to\b'
diff --git a/docs-site/.vale/styles/Ocjs/PowerfulFlexibleEasyToUse.yml b/docs-site/.vale/styles/Ocjs/PowerfulFlexibleEasyToUse.yml
new file mode 100644
index 00000000..14b657c5
--- /dev/null
+++ b/docs-site/.vale/styles/Ocjs/PowerfulFlexibleEasyToUse.yml
@@ -0,0 +1,8 @@
+extends: existence
+message: "Avoid the 'powerful, flexible, easy-to-use' marketing triplet — describe a concrete capability instead."
+level: error
+ignorecase: true
+tokens:
+ - 'powerful'
+ - 'flexible'
+ - 'easy[\s-]?to[\s-]?use'
diff --git a/docs-site/.vale/styles/Ocjs/Superlatives.yml b/docs-site/.vale/styles/Ocjs/Superlatives.yml
new file mode 100644
index 00000000..60a1c1aa
--- /dev/null
+++ b/docs-site/.vale/styles/Ocjs/Superlatives.yml
@@ -0,0 +1,14 @@
+extends: existence
+message: "Marketing superlatives ('%s') are banned — use concrete numbers or capability claims."
+level: error
+ignorecase: true
+tokens:
+ - 'blazing fast'
+ - 'lightning[\s-]?fast'
+ - 'state[\s-]?of[\s-]?the[\s-]?art'
+ - 'world[\s-]?class'
+ - 'cutting[\s-]?edge'
+ - 'best[\s-]?in[\s-]?class'
+ - 'next[\s-]?generation'
+ - 'revolutionary'
+ - 'game[\s-]?changing'
diff --git a/docs-site/.vale/styles/Ocjs/meta.json b/docs-site/.vale/styles/Ocjs/meta.json
new file mode 100644
index 00000000..89f54ef4
--- /dev/null
+++ b/docs-site/.vale/styles/Ocjs/meta.json
@@ -0,0 +1,4 @@
+{
+ "feed": "https://github.com/taucad/opencascade.js",
+ "vale_version": ">=3.0.0"
+}
diff --git a/docs-site/app/(home)/layout.tsx b/docs-site/app/(home)/layout.tsx
new file mode 100644
index 00000000..9dc1be49
--- /dev/null
+++ b/docs-site/app/(home)/layout.tsx
@@ -0,0 +1,9 @@
+import type { ReactNode } from 'react';
+import { HomeLayout } from 'fumadocs-ui/layouts/home';
+import { baseOptions } from '../layout.config';
+
+const HomeShellLayout = ({ children }: { readonly children: ReactNode }): React.JSX.Element => {
+ return {children} ;
+};
+
+export default HomeShellLayout;
diff --git a/docs-site/app/(home)/page.tsx b/docs-site/app/(home)/page.tsx
new file mode 100644
index 00000000..4d773721
--- /dev/null
+++ b/docs-site/app/(home)/page.tsx
@@ -0,0 +1,276 @@
+import Link from 'next/link';
+import type { ReactNode } from 'react';
+import { HomeFooter } from '../../components/home-footer';
+import { usedByProjects } from '../../lib/home-used-by';
+import { renderInlineCode } from '../../lib/inline-code-text';
+import { resolveIcon } from '../../lib/icon-resolver';
+import { GITHUB_REPO_URL } from '../../lib/site';
+
+const personaCards = [
+ {
+ title: 'npm consumer',
+ description: 'Install `@taucad/opencascade.js@beta`, render a box, export STEP. 4 minutes.',
+ href: '/docs/package/getting-started/quick-start-npm',
+ cta: 'Start with npm',
+ icon: 'lib:npm',
+ iconKind: 'brand',
+ primary: true,
+ },
+ {
+ title: 'Docker consumer',
+ description: 'Pull a GHCR image, link a YAML, build a trimmed wasm. 2 minutes.',
+ href: '/docs/toolchain/getting-started/quick-start-docker',
+ cta: 'Start with Docker',
+ icon: 'lib:docker',
+ iconKind: 'brand',
+ primary: false,
+ },
+ {
+ title: 'Library author',
+ description: 'Trim symbols, add custom C++, ship reproducible CI. No fork.',
+ href: '/docs/toolchain/guides/extend-with-cpp',
+ cta: 'Extend with C++',
+ icon: 'lib:webassembly',
+ iconKind: 'brand',
+ primary: false,
+ },
+ {
+ title: 'AI agent / LLM',
+ description: 'Fetch `/llms.txt` for the full surface, or any page as raw `.mdx`.',
+ href: '/llms.txt',
+ cta: 'Read llms.txt',
+ icon: 'lucide:bot text-fd-primary',
+ iconKind: 'lucide-tinted',
+ primary: false,
+ },
+] as const;
+
+const v3Highlights = [
+ {
+ title: 'ESM-only build',
+ description: 'One wasm, one `init()` Promise. No CommonJS.',
+ icon: 'lucide:zap text-amber-500',
+ },
+ {
+ title: 'Suffix-free symbols',
+ description: '`gp_Pnt`, not `gp_Pnt_3`. Overloads dispatched in C++.',
+ icon: 'lucide:scissors text-sky-500',
+ },
+ {
+ title: '`using` disposables',
+ description: 'Every shape implements `Symbol.dispose` for scope-exit memory management.',
+ icon: 'lucide:recycle text-emerald-500',
+ },
+ {
+ title: 'Multi-threaded WASM',
+ description: '1.24× geomean on mixed CAD. Opt in via `/multi`.',
+ icon: 'lucide:gauge text-fd-primary',
+ href: '/docs/package/guides/multi-threading',
+ },
+] as const;
+
+const v3Pillars = [
+ {
+ title: 'OCCT V8',
+ description:
+ 'First WebAssembly binding to track OCCT V8 — BRepGraph, modern differential property packages, NCollection size_t migration, Gordon surface construction.',
+ icon: 'lucide:layers text-fd-muted-foreground',
+ },
+ {
+ title: 'Agent-native',
+ description:
+ 'Every page is an `.mdx` resource. `/llms.txt` indexes the surface. Suffix-free symbols read like the C++ docs — LLMs hit the right overload without a lookup table.',
+ icon: 'lucide:bot text-fd-muted-foreground',
+ },
+ {
+ title: 'Browser-first',
+ description:
+ 'ESM single-file, Vite / Next / Bun ready, COOP/COEP-aware threading, multi-arch GHCR images so Apple Silicon and Linux build the same bytes.',
+ icon: 'lucide:globe text-fd-muted-foreground',
+ },
+] as const;
+
+const CHANGELOG_URL = `${GITHUB_REPO_URL}/blob/master/CHANGELOG.md`;
+const BREAKING_CHANGES_URL = `${GITHUB_REPO_URL}/blob/master/BREAKING_CHANGES.md`;
+
+const personaIconClass = (iconKind: 'brand' | 'lucide' | 'lucide-tinted'): string => {
+ if (iconKind === 'brand') {
+ return 'flex size-9 shrink-0 items-center justify-center rounded-lg border border-fd-border bg-fd-muted/30 p-1 [&_img]:size-full';
+ }
+ if (iconKind === 'lucide-tinted') {
+ return 'flex size-9 shrink-0 items-center justify-center rounded-lg border border-fd-border bg-fd-primary/10 p-1.5 [&_svg]:size-5';
+ }
+ return 'flex size-9 shrink-0 items-center justify-center rounded-lg border border-fd-border bg-fd-muted/30 p-1.5 [&_svg]:size-5';
+};
+
+const personaCardClass = (primary: boolean): string =>
+ primary
+ ? 'group block rounded-xl border border-yellow-500/60 bg-yellow-500/[0.03] p-5 shadow-sm transition-colors hover:border-yellow-500'
+ : 'group block rounded-xl border border-fd-border bg-fd-card p-5 transition-colors hover:border-fd-primary';
+
+const HomePage = (): ReactNode => {
+ return (
+
+
+
+
+
+ {personaCards.map((card) => (
+
+
+
+ {resolveIcon(card.icon)}
+
+
{renderInlineCode(card.title)}
+
+
{renderInlineCode(card.description)}
+
{card.cta} →
+
+ ))}
+
+
+
+
+ FAQ — fork status, maintenance, contributing →
+
+
+
+
+
+ Used by
+
+
+
+ See all projects →
+
+
+
+
+
+
+ V3 upgrades OCCT to V8 and modernizes the toolchain for the agentic, browser-first era.
+
+
+ {renderInlineCode(
+ 'This is not a maintenance bump. V3 retargets the bindings at coding agents and modern bundlers — the same wasm runs unchanged in a Vite tab, a Bun CLI, and a Cursor agent tool call.',
+ )}
+
+
+
+ {v3Pillars.map((pillar) => (
+
+
+
+ {resolveIcon(pillar.icon)}
+
+
{pillar.title}
+
+
{renderInlineCode(pillar.description)}
+
+ ))}
+
+
+
+
+ Read the V3 breaking changes →
+
+
+
+
+
+ What's new in V3
+
+
+ {v3Highlights.map((item) => {
+ const body = (
+ <>
+
+
+ {resolveIcon(item.icon)}
+
+
{renderInlineCode(item.title)}
+
+
{renderInlineCode(item.description)}
+ >
+ );
+
+ if ('href' in item && item.href !== undefined) {
+ return (
+
+ {body}
+
+ );
+ }
+
+ return (
+
+ {body}
+
+ );
+ })}
+
+
+
+
+ See full release notes →
+
+
+
+
+
+
+ );
+};
+
+export default HomePage;
diff --git a/docs-site/app/api/search/route.ts b/docs-site/app/api/search/route.ts
new file mode 100644
index 00000000..15ed189a
--- /dev/null
+++ b/docs-site/app/api/search/route.ts
@@ -0,0 +1,89 @@
+import 'server-only';
+import { promises as fs } from 'node:fs';
+import { resolve } from 'node:path';
+import { initAdvancedSearch } from 'fumadocs-core/search/server';
+import type { AdvancedIndex } from 'fumadocs-core/search/server';
+import { source } from '../../../lib/source';
+
+type ApiSearchEntry = {
+ readonly id: string;
+ readonly title: string;
+ readonly description: string;
+ readonly url: string;
+ readonly tag: string;
+ readonly structured: {
+ contents: ReadonlyArray<{ heading: string; content: string }>;
+ };
+};
+
+const SEARCH_INDEX_PATH = resolve(process.cwd(), 'data/api-search-index.json');
+
+/**
+ * Read the 20 MB JSON once per server process. Lives outside the Next
+ * module graph (no `import './api-search-index'`), so Turbopack / webpack
+ * never have to parse or bundle it.
+ */
+const loadApiEntries = async (): Promise => {
+ try {
+ const raw = await fs.readFile(SEARCH_INDEX_PATH, 'utf8');
+ return JSON.parse(raw) as readonly ApiSearchEntry[];
+ } catch {
+ return [];
+ }
+};
+
+const toAdvancedIndex = (entry: ApiSearchEntry): AdvancedIndex => ({
+ id: entry.id,
+ title: entry.title,
+ description: entry.description,
+ url: entry.url,
+ tag: entry.tag,
+ structuredData: {
+ headings: [],
+ contents: entry.structured.contents.map((c) => ({ heading: c.heading, content: c.content })),
+ },
+});
+
+const buildServer = async (): Promise> => {
+ // Hand-written docs: include only pages that carry MDX-derived
+ // structuredData. Virtual API pages (from `lib/api-source.ts`) have none,
+ // so they're filtered out here — their content is contributed by the
+ // dedicated `api-search-index.json` entries with `tag` of class | method |
+ // property below.
+ const sourceIndexes: AdvancedIndex[] = [];
+ for (const page of source.getPages()) {
+ if (page.type !== 'docs') continue;
+ if (page.url.startsWith('/docs/package/api/') || page.url === '/docs/package/api') continue;
+ const structuredData = page.data.structuredData;
+ if (!structuredData) continue;
+ sourceIndexes.push({
+ id: page.url,
+ title: page.data.title ?? page.url,
+ description: page.data.description ?? '',
+ url: page.url,
+ tag: 'docs',
+ structuredData,
+ });
+ }
+
+ const apiEntries = await loadApiEntries();
+ const apiIndexes = apiEntries.map(toAdvancedIndex);
+
+ return initAdvancedSearch({
+ indexes: [...sourceIndexes, ...apiIndexes],
+ language: 'english',
+ });
+};
+
+const serverPromise = buildServer();
+
+export const GET = async (request: Request): Promise => {
+ const server = await serverPromise;
+ const url = new URL(request.url);
+ const query = url.searchParams.get('query') ?? '';
+ const tag = url.searchParams.get('tag') ?? undefined;
+ const results = await server.search(query, tag ? { tag } : undefined);
+ return new Response(JSON.stringify(results), {
+ headers: { 'Content-Type': 'application/json; charset=utf-8' },
+ });
+};
diff --git a/docs-site/app/docs/[[...slug]]/page.tsx b/docs-site/app/docs/[[...slug]]/page.tsx
new file mode 100644
index 00000000..19ce8add
--- /dev/null
+++ b/docs-site/app/docs/[[...slug]]/page.tsx
@@ -0,0 +1,65 @@
+import type { Metadata } from 'next';
+import { notFound } from 'next/navigation';
+import { DocsBody, DocsDescription, DocsPage, DocsTitle } from 'fumadocs-ui/page';
+import { MarkdownCopyButton, ViewOptionsPopover } from 'fumadocs-ui/layouts/docs/page';
+import defaultMdxComponents from 'fumadocs-ui/mdx';
+import { TypeTable } from 'fumadocs-ui/components/type-table';
+import { source } from '../../../lib/source';
+import { Mermaid } from '../../../components/mermaid';
+import { TagBadge } from '../../../components/tag-badge';
+import { GITHUB_REPO_URL, DOCS_DIR } from '../../../lib/site';
+
+type PageProps = {
+ readonly params: Promise<{ readonly slug?: string[] }>;
+};
+
+const DocsPageRoute = async ({ params }: PageProps): Promise => {
+ const { slug } = await params;
+ // Virtual API pages (from `lib/api-source.ts`) are served by
+ // `app/docs/package/api/[[...slug]]/page.tsx`, which is a more-specific route and
+ // wins under Next routing. This guard is defensive: it ensures that if
+ // routing ever changes, a virtual page with no MDX `body` can never reach
+ // the catch-all renderer below (which would crash on `page.data.body`).
+ if (slug?.[0] === 'package' && slug?.[1] === 'api') notFound();
+ const page = source.getPage(slug);
+ if (!page || page.type !== 'docs') notFound();
+
+ const MdxContent = page.data.body;
+ const markdownUrl = `${page.url}.mdx`;
+ const githubUrl = `${GITHUB_REPO_URL}/blob/master/${DOCS_DIR}/${page.path}`;
+
+ return (
+
+ {page.data.title}
+ {page.data.description}
+
+
+
+
+
+
+
+
+ );
+};
+
+export default DocsPageRoute;
+
+export const generateStaticParams = (): Array<{ slug: string[] }> => source.generateParams();
+
+export const generateMetadata = async ({ params }: PageProps): Promise => {
+ const { slug } = await params;
+ const page = source.getPage(slug);
+ if (!page) return {};
+ return {
+ title: page.data.title,
+ description: page.data.description,
+ };
+};
diff --git a/docs-site/app/docs/layout.tsx b/docs-site/app/docs/layout.tsx
new file mode 100644
index 00000000..eb59e146
--- /dev/null
+++ b/docs-site/app/docs/layout.tsx
@@ -0,0 +1,14 @@
+import type { ReactNode } from 'react';
+import { DocsLayout } from 'fumadocs-ui/layouts/docs';
+import { source } from '../../lib/source';
+import { baseOptions, TauAttributionFooter } from '../layout.config';
+
+const DocsShellLayout = ({ children }: { readonly children: ReactNode }): React.JSX.Element => {
+ return (
+ }}>
+ {children}
+
+ );
+};
+
+export default DocsShellLayout;
diff --git a/docs-site/app/docs/package/api/[[...slug]]/page.tsx b/docs-site/app/docs/package/api/[[...slug]]/page.tsx
new file mode 100644
index 00000000..5615407a
--- /dev/null
+++ b/docs-site/app/docs/package/api/[[...slug]]/page.tsx
@@ -0,0 +1,114 @@
+import type { Metadata } from 'next';
+import { notFound } from 'next/navigation';
+import { DocsBody, DocsDescription, DocsPage, DocsTitle } from 'fumadocs-ui/page';
+import { MarkdownCopyButton, ViewOptionsPopover } from 'fumadocs-ui/layouts/docs/page';
+import { source } from '../../../../../lib/source';
+import {
+ enumerateApiRoutes,
+ resolveApiRoute,
+ type ApiRouteResolution,
+} from '../../../../../lib/api-route-resolver';
+import { ApiHierarchyTree } from '../../../../../components/api/api-hierarchy-tree';
+import { ApiModuleIndex } from '../../../../../components/api/api-module-index';
+import { ApiToolkitIndex } from '../../../../../components/api/api-toolkit-index';
+import { ApiPackagePage } from '../../../../../components/api/api-package-page';
+
+type PageProps = {
+ readonly params: Promise<{ readonly slug?: string[] }>;
+};
+
+const renderBody = (resolution: ApiRouteResolution): React.ReactNode => {
+ switch (resolution.kind) {
+ case 'root':
+ return ;
+ case 'module':
+ return ;
+ case 'toolkit':
+ return (
+
+ );
+ case 'package':
+ return (
+
+ );
+ }
+};
+
+const titleFor = (resolution: ApiRouteResolution): string => {
+ switch (resolution.kind) {
+ case 'root':
+ return 'API Reference';
+ case 'module':
+ return resolution.moduleName;
+ case 'toolkit':
+ return resolution.toolkitName;
+ case 'package':
+ return resolution.pageCount > 1
+ ? `${resolution.packageName} (page ${resolution.page} of ${resolution.pageCount})`
+ : resolution.packageName;
+ default: {
+ const _exhaustive: never = resolution;
+ return _exhaustive;
+ }
+ }
+};
+
+const descriptionFor = (resolution: ApiRouteResolution): string | undefined => {
+ if (resolution.kind === 'package') return resolution.description;
+ if (resolution.kind === 'root') {
+ return 'All bound OCCT classes, methods, and properties across every toolkit.';
+ }
+ const slug = resolution.kind === 'module' ? [resolution.moduleSlug] : [resolution.moduleSlug, resolution.toolkitSlug];
+ const page = source.getPage(['package', 'api', ...slug]);
+ return page?.data.description;
+};
+
+const ApiRoutePage = async ({ params }: PageProps): Promise => {
+ const { slug } = await params;
+ const resolution = resolveApiRoute(slug);
+ if (!resolution) notFound();
+
+ // Tie into the Fumadocs source so the sidebar tree highlights the right
+ // node and so `` picks up the toc context. The virtual page
+ // exists in `lib/api-source.ts`.
+ const page = source.getPage(['package', 'api', ...(slug ?? [])]);
+ const title = page?.data.title ?? titleFor(resolution);
+ const description = page?.data.description ?? descriptionFor(resolution);
+ const slugPath = (slug ?? []).join('/');
+ const markdownUrl = slugPath.length > 0 ? `/docs/package/api/${slugPath}.mdx` : '/docs/package/api.mdx';
+
+ return (
+
+ {title}
+ {description ? {description} : null}
+
+
+
+
+ {renderBody(resolution)}
+
+ );
+};
+
+export default ApiRoutePage;
+
+export const generateStaticParams = (): Array<{ slug: string[] }> => enumerateApiRoutes();
+
+export const generateMetadata = async ({ params }: PageProps): Promise => {
+ const { slug } = await params;
+ const resolution = resolveApiRoute(slug);
+ if (!resolution) return {};
+ return {
+ title: titleFor(resolution),
+ description: descriptionFor(resolution),
+ };
+};
diff --git a/docs-site/app/docs/package/api/llms.txt/route.ts b/docs-site/app/docs/package/api/llms.txt/route.ts
new file mode 100644
index 00000000..00d467b6
--- /dev/null
+++ b/docs-site/app/docs/package/api/llms.txt/route.ts
@@ -0,0 +1,37 @@
+import { apiTree } from '../../../../../lib/api-source';
+import { SITE_TITLE, SITE_URL } from '../../../../../lib/site';
+
+export const revalidate = false;
+
+/**
+ * Compact, AI-consumer index of every API package with a stable Markdown
+ * deep link. The accompanying `[[...slug]].mdx` route renders one package
+ * at a time as full Markdown — fetch a specific package via, e.g.
+ * `/docs/package/api/foundation-classes/tk-math/gp.mdx`.
+ */
+export const GET = (): Response => {
+ const lines: string[] = [];
+ lines.push(`# ${SITE_TITLE} — API Reference`);
+ lines.push(`Site: ${SITE_URL}`, '');
+ lines.push(
+ `This index lists every bound OCCT package. Fetch the full per-package reference as Markdown by appending \`.mdx\` to any URL below.`,
+ '',
+ );
+ for (const ocModule of apiTree.modules) {
+ lines.push(`## ${ocModule.name}`);
+ if (ocModule.description) lines.push(ocModule.description);
+ lines.push('');
+ for (const toolkit of ocModule.toolkits) {
+ lines.push(`### ${toolkit.name}`);
+ if (toolkit.description) lines.push(toolkit.description);
+ for (const pkg of toolkit.packages) {
+ const url = `${SITE_URL}/docs/package/api/${ocModule.slug}/${toolkit.slug}/${pkg.slug}`;
+ lines.push(`- [${pkg.name}](${url}): ${pkg.description}`);
+ }
+ lines.push('');
+ }
+ }
+ return new Response(lines.join('\n'), {
+ headers: { 'Content-Type': 'text/plain; charset=utf-8' },
+ });
+};
diff --git a/docs-site/app/global.css b/docs-site/app/global.css
new file mode 100644
index 00000000..aa0e113a
--- /dev/null
+++ b/docs-site/app/global.css
@@ -0,0 +1,95 @@
+@import 'tailwindcss';
+@import 'fumadocs-ui/css/neutral.css';
+@import 'fumadocs-ui/css/preset.css';
+
+@source '../node_modules/fumadocs-ui/dist/**/*.js';
+@source '../node_modules/streamdown/dist/*.js';
+
+/*
+ * Streamdown ships shadcn/ui token class names (`text-foreground`, `bg-muted`,
+ * `text-muted-foreground`, `text-primary`, `border-border`) on the markdown
+ * elements it renders by default — most visibly its Shiki code blocks and
+ * tables. Fumadocs exposes the same palette under `--color-fd-*` tokens, so we
+ * alias the shadcn names onto the Fumadocs ones. `@theme inline` keeps the
+ * utilities referencing the `--color-fd-*` variables at use-site, so they flip
+ * automatically between light and dark with the rest of the theme.
+ */
+@theme inline {
+ --color-foreground: var(--color-fd-foreground);
+ --color-muted: var(--color-fd-muted);
+ --color-muted-foreground: var(--color-fd-muted-foreground);
+ --color-border: var(--color-fd-border);
+ --color-primary: var(--color-fd-primary);
+}
+
+/**
+ * API-reference signature token palette — aligned with VSCode's default
+ * TypeScript *semantic* highlighting (Default Light Modern / Default Dark
+ * Modern) so a signature line is coloured the way an editor would colour the
+ * equivalent `.d.ts`. The previous palette painted every OCCT identifier
+ * (class titles, `extends` chips, member names AND type references) with one
+ * purple `fn` hue, which made purple dominate the page.
+ *
+ * Mapping (VSCode semantic token → token below):
+ * keyword (`storage`/`keyword`: extends, readonly, new, constructor) →
+ * keyword hue (Light #AF00DB / Dark #C586C0 — VSCode's magenta)
+ * type (`entity.name.type`/`class`: OCCT classes, void, boolean,
+ * number, return + param types) →
+ * type hue (Light #267F99 / Dark #4EC9B0 — VSCode's teal)
+ * variable / `entity.name.function` (param names, method/property names,
+ * identifiers) → plain foreground (`--color-fd-foreground`)
+ * punctuation (`()`, `:`, `<>`, `|`, `?`, `...`) →
+ * muted foreground (`--color-fd-muted-foreground`)
+ *
+ * `--color-api-fn` is retained solely for `{@link}` cross-reference links in
+ * the description prose (`api-markdown.tsx`), where an accent link colour is
+ * conventional and intentional.
+ */
+@theme {
+ --color-api-keyword: #af00db;
+ --color-api-type: #267f99;
+ --color-api-fn: #6f42c1;
+}
+
+.dark {
+ --color-api-keyword: #c586c0;
+ --color-api-type: #4ec9b0;
+ --color-api-fn: #b392f0;
+}
+
+body {
+ font-family:
+ 'Inter',
+ ui-sans-serif,
+ system-ui,
+ -apple-system,
+ sans-serif;
+}
+
+/**
+ * Deep-link highlight. When the page loads with (or navigates to) a
+ * `#Class` / `#Class__kind__idx` hash, `ApiHashHighlight` adds this class to
+ * the target class card / member row to flash a primary-tinted ring that fades
+ * out. Box-shadow only (no background) so the card's `bg-fd-card` is never
+ * momentarily overridden, and the ring respects each element's own rounded
+ * corners. Theme-aware via the Fumadocs `--color-fd-primary` token.
+ */
+@keyframes api-anchor-flash {
+ 0%,
+ 12% {
+ box-shadow: 0 0 0 2px color-mix(in oklab, var(--color-fd-primary) 65%, transparent);
+ }
+ 100% {
+ box-shadow: 0 0 0 2px transparent;
+ }
+}
+
+.api-anchor-flash {
+ animation: api-anchor-flash 1.6s ease-out;
+}
+
+@media (prefers-reduced-motion: reduce) {
+ .api-anchor-flash {
+ animation-duration: 0.01ms;
+ }
+}
diff --git a/docs-site/app/layout.config.tsx b/docs-site/app/layout.config.tsx
new file mode 100644
index 00000000..c6403b1b
--- /dev/null
+++ b/docs-site/app/layout.config.tsx
@@ -0,0 +1,38 @@
+import Link from 'next/link';
+import type { ReactNode } from 'react';
+import type { BaseLayoutProps } from 'fumadocs-ui/layouts/shared';
+import { GITHUB_REPO_URL } from '../lib/site';
+
+export const NavTitle = (): ReactNode => (
+
+ {/* eslint-disable-next-line @next/next/no-img-element -- inline SVG brand mark in nav chrome */}
+
+ OpenCascade.js
+
+);
+
+export const TauAttributionFooter = (): ReactNode => (
+
+ Maintained by{' '}
+
+ Tau
+ {' '}
+ during the V3 / OCCT V8 release window — see the{' '}
+
+ FAQ
+
+ .
+
+);
+
+export const baseOptions: BaseLayoutProps = {
+ nav: {
+ title: ,
+ },
+ githubUrl: GITHUB_REPO_URL,
+ links: [
+ { text: 'Package', url: '/docs/package' },
+ { text: 'Toolchain', url: '/docs/toolchain' },
+ { text: 'API', url: '/docs/package/api' },
+ ],
+};
diff --git a/docs-site/app/layout.tsx b/docs-site/app/layout.tsx
new file mode 100644
index 00000000..5ac3569c
--- /dev/null
+++ b/docs-site/app/layout.tsx
@@ -0,0 +1,27 @@
+import type { ReactNode } from 'react';
+import type { Metadata } from 'next';
+import { RootProvider } from 'fumadocs-ui/provider/next';
+import { SITE_TITLE, SITE_DESCRIPTION, SITE_URL } from '../lib/site';
+import './global.css';
+
+export const metadata: Metadata = {
+ metadataBase: new URL(SITE_URL),
+ title: { default: SITE_TITLE, template: '%s — OpenCascade.js' },
+ description: SITE_DESCRIPTION,
+ icons: {
+ icon: '/favicon.ico',
+ apple: '/favicon.ico',
+ },
+};
+
+const RootLayout = ({ children }: { readonly children: ReactNode }): React.JSX.Element => {
+ return (
+
+
+ {children}
+
+
+ );
+};
+
+export default RootLayout;
diff --git a/docs-site/app/llms-full.txt/route.ts b/docs-site/app/llms-full.txt/route.ts
new file mode 100644
index 00000000..e29faf0e
--- /dev/null
+++ b/docs-site/app/llms-full.txt/route.ts
@@ -0,0 +1,23 @@
+import { source } from '../../lib/source';
+import { getLlmText } from '../../lib/get-llms-text';
+
+export const revalidate = false;
+
+export const GET = async (): Promise => {
+ const sections: string[] = [];
+ for (const page of source.getPages()) {
+ // Virtual API pages (under /docs/package/api/*) have no MDX body. They expose
+ // their full reference content through `/docs/package/api/<...>.mdx` instead,
+ // which is synthesised from the shard JSON in
+ // `app/docs/package/api/[[...slug]].mdx/route.ts`.
+ if (page.type !== 'docs') continue;
+ if (page.url === '/docs/package/api' || page.url.startsWith('/docs/package/api/')) continue;
+ sections.push(await getLlmText(page));
+ }
+ sections.push(
+ '# API Reference\nThe full bound OCCT API (5 000+ classes) is exposed as one synthesised Markdown page per package at `/docs/package/api///.mdx`. Use the search endpoint at `/api/search?query=…` to discover entries.',
+ );
+ return new Response(sections.join('\n\n---\n\n'), {
+ headers: { 'Content-Type': 'text/plain; charset=utf-8' },
+ });
+};
diff --git a/docs-site/app/llms.mdx/docs/[[...slug]]/route.ts b/docs-site/app/llms.mdx/docs/[[...slug]]/route.ts
new file mode 100644
index 00000000..3948c968
--- /dev/null
+++ b/docs-site/app/llms.mdx/docs/[[...slug]]/route.ts
@@ -0,0 +1,39 @@
+import { notFound } from 'next/navigation';
+import { source } from '../../../../lib/source';
+import { getLlmText } from '../../../../lib/get-llms-text';
+
+type RouteParams = { readonly params: Promise<{ readonly slug?: string[] }> };
+
+export const revalidate = false;
+
+/**
+ * Raw-Markdown handler for hand-written docs.
+ *
+ * URL shape exposed to consumers: `/docs/.mdx` (rewritten in
+ * `next.config.ts` to `/llms.mdx/docs/` so the literal `.mdx`
+ * sits on a static parent folder — the dynamic catch-all sibling of
+ * `.mdx` is the Next.js / Turbopack edge case that produces a 404).
+ *
+ * The more-specific synthesised API handler lives at
+ * `app/llms.mdx/docs/api/[[...slug]]/route.ts`.
+ */
+export const GET = async (_request: Request, { params }: RouteParams): Promise => {
+ const resolved = (await params) ?? {};
+ if (resolved.slug?.[0] === 'package' && resolved.slug?.[1] === 'api') notFound();
+ const page = source.getPage(resolved.slug);
+ if (!page || page.type !== 'docs') notFound();
+ const text = await getLlmText(page);
+ return new Response(text, {
+ headers: { 'Content-Type': 'text/plain; charset=utf-8' },
+ });
+};
+
+export const generateStaticParams = (): Array<{ slug: string[] }> =>
+ source
+ .generateParams()
+ .filter(
+ (entry) =>
+ Array.isArray(entry.slug) &&
+ entry.slug.length > 0 &&
+ !(entry.slug[0] === 'package' && entry.slug[1] === 'api'),
+ );
diff --git a/docs-site/app/llms.mdx/docs/package/api/[[...slug]]/route.ts b/docs-site/app/llms.mdx/docs/package/api/[[...slug]]/route.ts
new file mode 100644
index 00000000..7051a124
--- /dev/null
+++ b/docs-site/app/llms.mdx/docs/package/api/[[...slug]]/route.ts
@@ -0,0 +1,96 @@
+import { notFound } from 'next/navigation';
+import { resolveApiRoute, enumerateApiRoutes } from '../../../../../../lib/api-route-resolver';
+import { slicePackageClasses } from '../../../../../../lib/api-package-pagination';
+import { loadShard } from '../../../../../../components/api/api-data';
+import { shardToMarkdown } from '../../../../../../lib/shard-to-markdown';
+import { apiTree } from '../../../../../../lib/api-source';
+
+type RouteParams = { readonly params: Promise<{ readonly slug?: string[] }> };
+
+export const revalidate = false;
+
+const renderListing = (title: string, url: string, links: ReadonlyArray<{ name: string; url: string; description?: string }>): string => {
+ const lines: string[] = [];
+ lines.push(`# ${title}`, `URL: ${url}`, '');
+ for (const link of links) {
+ if (link.description) {
+ lines.push(`- [${link.name}](${link.url}): ${link.description}`);
+ } else {
+ lines.push(`- [${link.name}](${link.url})`);
+ }
+ }
+ return lines.join('\n');
+};
+
+/**
+ * Raw-Markdown handler for synthesised OCCT API package pages.
+ *
+ * URL shape exposed to consumers: `/docs/package/api/.mdx` and
+ * `/docs/package/api.mdx` for the root — rewritten in `next.config.ts` to
+ * `/llms.mdx/docs/package/api/` and `/llms.mdx/docs/package/api` respectively
+ * so the literal `.mdx` lives on a static parent folder. The
+ * `[[...slug]].mdx` folder pattern (literal extension on a dynamic
+ * catch-all) is silently broken in Next.js App Router and produces
+ * a route regex that collides with the sibling `[[...slug]]/page.tsx`.
+ */
+export const GET = async (_request: Request, { params }: RouteParams): Promise => {
+ const resolved = (await params) ?? {};
+ const resolution = resolveApiRoute(resolved.slug);
+ if (!resolution) notFound();
+
+ let body: string;
+ if (resolution.kind === 'package') {
+ const shard = await loadShard(resolution.shardKey);
+ const { slice } = slicePackageClasses(shard.classes ?? [], resolution.page);
+ const title =
+ resolution.pageCount > 1
+ ? `${resolution.packageName} (page ${resolution.page} of ${resolution.pageCount})`
+ : resolution.packageName;
+ const baseUrl = `/docs/package/api/${resolution.moduleSlug}/${resolution.toolkitSlug}/${resolution.packageSlug}`;
+ const url =
+ resolution.page > 1 ? `${baseUrl}/page-${resolution.page}` : baseUrl;
+ body = shardToMarkdown({ ...shard, classes: [...slice] }, { title, url });
+ } else if (resolution.kind === 'toolkit') {
+ const ocModule = apiTree.modules.find((m) => m.slug === resolution.moduleSlug);
+ const toolkit = ocModule?.toolkits.find((t) => t.slug === resolution.toolkitSlug);
+ const packages = toolkit?.packages ?? [];
+ body = renderListing(
+ `${resolution.toolkitName} — Packages`,
+ `/docs/package/api/${resolution.moduleSlug}/${resolution.toolkitSlug}`,
+ packages.map((p) => ({
+ name: p.name,
+ url: `/docs/package/api/${resolution.moduleSlug}/${resolution.toolkitSlug}/${p.slug}`,
+ description: p.description,
+ })),
+ );
+ } else if (resolution.kind === 'module') {
+ const ocModule = apiTree.modules.find((m) => m.slug === resolution.moduleSlug);
+ const toolkits = ocModule?.toolkits ?? [];
+ body = renderListing(
+ `${resolution.moduleName} — Toolkits`,
+ `/docs/package/api/${resolution.moduleSlug}`,
+ toolkits.map((t) => ({
+ name: t.name,
+ url: `/docs/package/api/${resolution.moduleSlug}/${t.slug}`,
+ description: t.description,
+ })),
+ );
+ } else {
+ body = renderListing(
+ 'API Reference',
+ '/docs/package/api',
+ apiTree.modules.map((m) => ({
+ name: m.name,
+ url: `/docs/package/api/${m.slug}`,
+ description: m.description,
+ })),
+ );
+ }
+
+ return new Response(body, {
+ headers: { 'Content-Type': 'text/plain; charset=utf-8' },
+ });
+};
+
+export const generateStaticParams = (): Array<{ slug: string[] }> =>
+ enumerateApiRoutes().filter((entry) => entry.slug.length > 0);
diff --git a/docs-site/app/llms.txt/route.ts b/docs-site/app/llms.txt/route.ts
new file mode 100644
index 00000000..231ccbba
--- /dev/null
+++ b/docs-site/app/llms.txt/route.ts
@@ -0,0 +1,11 @@
+import { getLlmRefText } from '../../lib/get-llms-text';
+import { SITE_TITLE, SITE_URL } from '../../lib/site';
+
+export const revalidate = false;
+
+export const GET = (): Response => {
+ const body = getLlmRefText({ siteTitle: SITE_TITLE, siteUrl: SITE_URL });
+ return new Response(body, {
+ headers: { 'Content-Type': 'text/plain; charset=utf-8' },
+ });
+};
diff --git a/docs-site/app/og/[...slug]/route.tsx b/docs-site/app/og/[...slug]/route.tsx
new file mode 100644
index 00000000..ecd5ec06
--- /dev/null
+++ b/docs-site/app/og/[...slug]/route.tsx
@@ -0,0 +1,41 @@
+import { ImageResponse } from '@vercel/og';
+import { source } from '../../../lib/source';
+import { SITE_TITLE } from '../../../lib/site';
+
+export const runtime = 'nodejs';
+
+type RouteParams = { readonly params: Promise<{ readonly slug: string[] }> };
+
+export const GET = async (_request: Request, { params }: RouteParams): Promise => {
+ const { slug } = await params;
+ const page = source.getPage(slug);
+ const title = page?.data.title ?? SITE_TITLE;
+ const description = page?.data.description ?? '';
+
+ return new ImageResponse(
+ (
+
+
OpenCascade.js
+
{title}
+ {description ? (
+
+ {description}
+
+ ) : undefined}
+
+ ),
+ { width: 1200, height: 630 },
+ );
+};
diff --git a/docs-site/components/api/api-anchor.tsx b/docs-site/components/api/api-anchor.tsx
new file mode 100644
index 00000000..6c20cc3f
--- /dev/null
+++ b/docs-site/components/api/api-anchor.tsx
@@ -0,0 +1,63 @@
+'use client';
+
+import { useState } from 'react';
+import type { ReactNode } from 'react';
+import { Link2, Check } from 'lucide-react';
+
+export type ApiAnchorProps = {
+ /** Stable element id this anchor targets (also becomes the URL hash). */
+ readonly anchorId: string;
+ /** Human-readable label (class or member name) for accessible naming. */
+ readonly label: string;
+};
+
+/**
+ * Hover-revealed "copy link" affordance shown to the right of a class title
+ * or member name. Clicking copies the absolute deep-link URL (`…#`)
+ * to the clipboard, updates the address-bar hash, and flashes a tick on
+ * success — reusing the tick-on-copy pattern from `tag-badge.tsx`.
+ *
+ * The icon stays hidden until the surrounding `group` element (the card
+ * header / member row) is hovered or this button is keyboard-focused,
+ * matching the standard docs "#"/link-icon affordance. Replacing the hash via
+ * `history.replaceState` (rather than assigning `location.hash`) avoids both a
+ * history entry and a native jump — the item is already in view — while the
+ * manual `hashchange` dispatch lets `ApiHashHighlight` flash the linked target
+ * so the user can confirm exactly what was copied.
+ */
+export const ApiAnchor = ({ anchorId, label }: ApiAnchorProps): ReactNode => {
+ const [copied, setCopied] = useState(false);
+
+ const handleCopy = async (): Promise => {
+ const origin = globalThis.location?.origin ?? '';
+ const pathname = globalThis.location?.pathname ?? '';
+ // Update the hash + flash the target first so the anchor still works even
+ // if the Clipboard API is unavailable (it rejects when the document is
+ // unfocused or permission is denied). The tick only shows on a real copy.
+ globalThis.history?.replaceState(null, '', `#${anchorId}`);
+ globalThis.dispatchEvent?.(new HashChangeEvent('hashchange'));
+ try {
+ await globalThis.navigator?.clipboard?.writeText(`${origin}${pathname}#${anchorId}`);
+ setCopied(true);
+ globalThis.setTimeout?.(() => setCopied(false), 1200);
+ } catch {
+ // Clipboard blocked; the address-bar hash is already updated, so the
+ // deep-link remains shareable via the URL bar.
+ }
+ };
+
+ const Icon = copied ? Check : Link2;
+ return (
+
+
+
+ );
+};
diff --git a/docs-site/components/api/api-class-card.tsx b/docs-site/components/api/api-class-card.tsx
new file mode 100644
index 00000000..712c0f3f
--- /dev/null
+++ b/docs-site/components/api/api-class-card.tsx
@@ -0,0 +1,372 @@
+import { Fragment } from 'react';
+import type { ReactNode } from 'react';
+import { ApiSignature } from './api-signature';
+import { ApiInheritanceChip } from './api-inheritance-chip';
+import { ApiProse } from './api-prose';
+import { ApiTypeLink } from './api-type-link';
+import { ApiAnchor } from './api-anchor';
+import { parseComment, type ParsedComment } from './parse-comment';
+import { buildClassAnchorMap } from './types';
+import type { ApiClass, ApiMethod, ApiProperty } from './types';
+
+const IDENT_RE = /([A-Za-z_]\w*)/g;
+
+/**
+ * Same renderer as `ApiSignature.renderTypeTokens` but inlined so property
+ * rows can linkify their type strings without depending on the signature
+ * module. Punctuation gets the muted foreground; the identifier itself runs
+ * through `ApiTypeLink` (keywords take the keyword hue, types take the type
+ * hue), matching VSCode's default TypeScript semantic highlighting.
+ */
+const renderTypeTokens = (raw: string): ReactNode[] => {
+ const out: ReactNode[] = [];
+ let cursor = 0;
+ for (const match of raw.matchAll(IDENT_RE)) {
+ if (match.index === undefined) continue;
+ if (match.index > cursor) {
+ out.push(
+
+ {raw.slice(cursor, match.index)}
+ ,
+ );
+ }
+ out.push( );
+ cursor = match.index + match[0].length;
+ }
+ if (cursor < raw.length) {
+ out.push(
+
+ {raw.slice(cursor)}
+ ,
+ );
+ }
+ return out;
+};
+
+const isOverload = (arr: readonly ApiMethod[], i: number): boolean => {
+ const name = arr[i]?.name;
+ if (!name) return false;
+ const before = i > 0 && arr[i - 1]?.name === name;
+ const after = i < arr.length - 1 && arr[i + 1]?.name === name;
+ return before || after;
+};
+
+const collectChain = (cls: ApiClass): string[] => {
+ const seen = new Set();
+ const out: string[] = [];
+ const push = (t: string | undefined): void => {
+ if (!t) return;
+ const norm = t.trim();
+ if (!norm || seen.has(norm)) return;
+ seen.add(norm);
+ out.push(norm);
+ };
+ for (const t of cls.extends ?? []) push(t);
+ const anc = cls.ancestors;
+ if (Array.isArray(anc)) {
+ for (const a of anc) push(typeof a === 'string' ? a : undefined);
+ } else if (anc && typeof anc === 'object') {
+ for (const key of Object.keys(anc)) push(key);
+ }
+ return out;
+};
+
+/**
+ * Member names that are TypeScript keywords (rather than identifiers) take
+ * the keyword hue; every other member name is a plain identifier and renders
+ * in the foreground colour — matching VSCode's semantic highlighting, where
+ * `constructor`/`new` are keywords but method/property names are not.
+ */
+const KEYWORD_MEMBER_NAMES = new Set(['constructor', 'new']);
+
+const memberNameClass = (name: string): string =>
+ KEYWORD_MEMBER_NAMES.has(name) ? 'text-api-keyword' : 'text-fd-foreground';
+
+const DefList = ({
+ label,
+ children,
+}: {
+ readonly label: string;
+ readonly children: ReactNode;
+}): ReactNode => (
+
+
+ {label}
+
+
{children}
+
+);
+
+const ParametersList = ({
+ parameters,
+ parsed,
+}: {
+ readonly parameters: readonly ApiMethod['parameters'][number][];
+ readonly parsed: ParsedComment;
+}): ReactNode => {
+ if (parameters.length === 0) return undefined;
+ return (
+
+
+ {parameters.map((p) => {
+ const description = parsed.params.get(p.name);
+ return (
+
+ {p.name}
+ {description ? (
+ <>
+ —
+
+ >
+ ) : undefined}
+
+ );
+ })}
+
+
+ );
+};
+
+const ReturnsBlock = ({
+ returnType,
+ text,
+}: {
+ readonly returnType: string;
+ readonly text: string | null;
+}): ReactNode => {
+ if (!text && (returnType === 'void' || returnType === 'undefined')) return undefined;
+ if (!text) return undefined;
+ return (
+
+
+
+ );
+};
+
+const RemarksBlock = ({ text }: { readonly text: string | null }): ReactNode => {
+ if (!text) return undefined;
+ return (
+
+
+
+ );
+};
+
+const SeeBlock = ({ items }: { readonly items: readonly string[] }): ReactNode => {
+ if (items.length === 0) return undefined;
+ return (
+
+
+ {items.map((entry, idx) => (
+
+
+
+ ))}
+
+
+ );
+};
+
+const DeprecatedBanner = ({ text }: { readonly text: string | null }): ReactNode => {
+ if (text === null) return undefined;
+ return (
+
+
+ Deprecated
+
+ {text ? (
+
+ ) : undefined}
+
+ );
+};
+
+const renderMemberRow = (
+ anchorId: string,
+ arr: readonly ApiMethod[],
+ i: number,
+): ReactNode => {
+ const member = arr[i]!;
+ const overload = isOverload(arr, i);
+ const parsed = parseComment(member.comment);
+ const isDeprecated = parsed.deprecated !== null;
+ return (
+
+
+ {parsed.description ? (
+
+ ) : undefined}
+
+
+
+
+
+
+ );
+};
+
+const renderPropertyRow = (
+ anchorId: string,
+ arr: readonly ApiProperty[],
+ i: number,
+): ReactNode => {
+ const prop = arr[i]!;
+ const parsed = parseComment(prop.comment);
+ const isDeprecated = parsed.deprecated !== null;
+ return (
+
+
+
+ {prop.name}
+
+
+
:
+
{renderTypeTokens(prop.type)}
+ {prop.readonly ? (
+
+ readonly
+
+ ) : undefined}
+
+ {parsed.description ? (
+
+ ) : undefined}
+
+
+
+
+ );
+};
+
+const Section = ({
+ title,
+ count,
+ children,
+}: {
+ readonly title: string;
+ readonly count: number;
+ readonly children: ReactNode;
+}): ReactNode => (
+
+
+ {title}
+ ({count})
+
+
+
+);
+
+export type ApiClassCardProps = {
+ readonly cls: ApiClass;
+};
+
+/**
+ * Single OCCT class card. Composes signature/chip/prose components into
+ * sections for constructors, static methods, instance methods, and
+ * properties. Each member row now structures its JSDoc payload — the raw
+ * comment is parsed (see `parse-comment.ts`) and laid out as a description
+ * paragraph plus dedicated Parameters / Returns / Remarks / See-also
+ * blocks, instead of dumping `@param ... @returns ...` text into a single
+ * paragraph.
+ *
+ * Adjacent same-name members are flagged as connected overloads via dashed
+ * borders. Anchor IDs are deterministic, human-readable
+ * `-` strings (with a 0-indexed ordinal on overloaded
+ * tokens); see `buildClassAnchorMap` in `./types.ts`.
+ *
+ * Wrapped in `not-prose` so Tailwind Typography's `prose a` underline-all
+ * rule doesn't bleed into the structured layout (member names, chips,
+ * cross-reference links each have their own intentional styling).
+ */
+export const ApiClassCard = ({ cls }: ApiClassCardProps): ReactNode => {
+ const chain = collectChain(cls);
+ const classDoc = parseComment(cls.summary);
+ const anchors = buildClassAnchorMap(cls);
+ return (
+
+
+
+ {chain.length > 0 ? (
+
+ {chain.map((t) => (
+
+
+
+ ))}
+
+ ) : undefined}
+
+
+ {classDoc.description ? (
+
+ ) : undefined}
+
+ {cls.constructors.length > 0 ? (
+
+ {cls.constructors.map((_, i) => renderMemberRow(anchors.get(`ctor:${i}`)!, cls.constructors, i))}
+
+ ) : undefined}
+
+ {cls.staticMethods.length > 0 ? (
+
+ {cls.staticMethods.map((_, i) => renderMemberRow(anchors.get(`static:${i}`)!, cls.staticMethods, i))}
+
+ ) : undefined}
+
+ {cls.instanceMethods.length > 0 ? (
+
+ {cls.instanceMethods.map((_, i) => renderMemberRow(anchors.get(`inst:${i}`)!, cls.instanceMethods, i))}
+
+ ) : undefined}
+
+ {cls.properties.length > 0 ? (
+
+ {cls.properties.map((_, i) => renderPropertyRow(anchors.get(`prop:${i}`)!, cls.properties, i))}
+
+ ) : undefined}
+
+ );
+};
diff --git a/docs-site/components/api/api-data.ts b/docs-site/components/api/api-data.ts
new file mode 100644
index 00000000..0d8d5fd9
--- /dev/null
+++ b/docs-site/components/api/api-data.ts
@@ -0,0 +1,29 @@
+import { promises as fs } from 'node:fs';
+import { join, resolve } from 'node:path';
+import type { ApiIndex, ApiShard } from './types';
+
+const DATA_DIR = resolve(process.cwd(), 'data');
+
+let indexPromise: Promise | undefined;
+
+export const loadIndex = (): Promise => {
+ if (!indexPromise) {
+ indexPromise = fs
+ .readFile(join(DATA_DIR, 'index.json'), 'utf8')
+ .then((raw) => JSON.parse(raw) as ApiIndex);
+ }
+ return indexPromise;
+};
+
+const shardCache = new Map>();
+
+export const loadShard = (shardKey: string): Promise => {
+ let promise = shardCache.get(shardKey);
+ if (!promise) {
+ promise = fs
+ .readFile(join(DATA_DIR, `${shardKey}.json`), 'utf8')
+ .then((raw) => JSON.parse(raw) as ApiShard);
+ shardCache.set(shardKey, promise);
+ }
+ return promise;
+};
diff --git a/docs-site/components/api/api-hash-highlight.tsx b/docs-site/components/api/api-hash-highlight.tsx
new file mode 100644
index 00000000..21dbc421
--- /dev/null
+++ b/docs-site/components/api/api-hash-highlight.tsx
@@ -0,0 +1,44 @@
+'use client';
+
+import { useEffect } from 'react';
+
+const FLASH_CLASS = 'api-anchor-flash';
+
+/**
+ * Scrolls the element matching the current URL hash into view and briefly
+ * flashes a highlight ring on it. Re-adding the animation class after a forced
+ * reflow restarts the keyframes even when the same target is re-linked.
+ */
+const focusHash = (): void => {
+ const hash = globalThis.location?.hash;
+ if (!hash || hash.length < 2) return;
+ const id = decodeURIComponent(hash.slice(1));
+ const element = globalThis.document?.getElementById(id);
+ if (!element) return;
+ element.scrollIntoView({ behavior: 'smooth', block: 'start' });
+ element.classList.remove(FLASH_CLASS);
+ void element.offsetWidth;
+ element.classList.add(FLASH_CLASS);
+ globalThis.setTimeout?.(() => element.classList.remove(FLASH_CLASS), 1600);
+};
+
+/**
+ * Client-only behaviour for API anchor deep-links. On initial mount (page
+ * loaded with a `#Class` / `#Class-Member` hash) and on every subsequent
+ * `hashchange` — whether from clicking a member-name link or copying a link
+ * via `ApiAnchor` — smooth-scrolls the target into view and flashes a
+ * highlight so the linked class/member is easy to spot. Renders nothing.
+ */
+export const ApiHashHighlight = (): null => {
+ useEffect(() => {
+ // Defer the initial pass so the SSR'd target is in the DOM and any native
+ // hash jump has settled before the smooth-scroll + flash.
+ const initial = globalThis.setTimeout?.(focusHash, 60);
+ globalThis.addEventListener?.('hashchange', focusHash);
+ return () => {
+ globalThis.clearTimeout?.(initial);
+ globalThis.removeEventListener?.('hashchange', focusHash);
+ };
+ }, []);
+ return null;
+};
diff --git a/docs-site/components/api/api-hierarchy-tree.tsx b/docs-site/components/api/api-hierarchy-tree.tsx
new file mode 100644
index 00000000..b346ba57
--- /dev/null
+++ b/docs-site/components/api/api-hierarchy-tree.tsx
@@ -0,0 +1,107 @@
+import Link from 'next/link';
+import type { ReactNode } from 'react';
+import { loadIndex } from './api-data';
+
+const kebab = (input: string): string =>
+ input
+ .replace(/([a-z\d])([A-Z])/g, '$1-$2')
+ .replace(/([A-Z])([A-Z][a-z])/g, '$1-$2')
+ .toLowerCase();
+
+const ApiStat = ({ label, value }: { readonly label: string; readonly value: ReactNode }): ReactNode => (
+
+
+ {label}
+
+ {value}
+
+);
+
+/**
+ * Renders the full API hierarchy on the `/docs/package/api` landing page as a
+ * Module / Toolkit / Package tree. Reads `data/index.json` at build time;
+ * no client JS.
+ */
+export const ApiHierarchyTree = async (): Promise => {
+ const index = await loadIndex();
+ const manifest = index.manifest;
+
+ return (
+
+
+
+
+ {index.modules.map((ocModule) => {
+ const moduleSlug = kebab(ocModule.name);
+ return (
+
+
+
+ ▸
+
+
+ {ocModule.name}
+
+
+ {ocModule.classCount} classes ·{' '}
+ {ocModule.toolkitCount} toolkits
+
+
+
+ {ocModule.toolkits.map((toolkit) => {
+ const toolkitSlug = kebab(toolkit.name);
+ return (
+
+
+
+ {toolkit.name}
+
+
+ {toolkit.classCount} classes
+
+
+
+ {toolkit.packages.map((pkg) => (
+
+ {pkg.name}
+
+ ))}
+
+
+ );
+ })}
+
+
+ );
+ })}
+
+
+ );
+};
diff --git a/docs-site/components/api/api-inheritance-chip.tsx b/docs-site/components/api/api-inheritance-chip.tsx
new file mode 100644
index 00000000..8ccbd2dc
--- /dev/null
+++ b/docs-site/components/api/api-inheritance-chip.tsx
@@ -0,0 +1,24 @@
+import type { ReactNode } from 'react';
+import { ApiTypeLink } from './api-type-link';
+
+export type ApiInheritanceChipProps = {
+ readonly type: string;
+};
+
+/**
+ * Clickable type chip used in the inheritance chain (`extends`) row of
+ * `ApiClassCard`. Rendered with the `plain` tone so the parent class name
+ * reads as a quiet, foreground-coloured chip rather than a coloured type
+ * reference — the chip's border + muted background already signal it as a
+ * distinct element. Resolves through `ApiTypeLink`; misses render as a plain
+ * chip.
+ */
+export const ApiInheritanceChip = ({ type }: ApiInheritanceChipProps): ReactNode => {
+ const trimmed = (type ?? '').trim();
+ if (!trimmed) return undefined;
+ return (
+
+
+
+ );
+};
diff --git a/docs-site/components/api/api-markdown.tsx b/docs-site/components/api/api-markdown.tsx
new file mode 100644
index 00000000..1879efb9
--- /dev/null
+++ b/docs-site/components/api/api-markdown.tsx
@@ -0,0 +1,156 @@
+'use client';
+
+import Link from 'next/link';
+import type { ComponentProps, ReactNode } from 'react';
+import { Streamdown, defaultRemarkPlugins } from 'streamdown';
+import remarkBreaks from 'remark-breaks';
+
+/**
+ * The `remarkPlugins` prop replaces Streamdown's defaults rather than extending
+ * them, so we re-include the bundled defaults (GFM + code-meta) and append
+ * `remark-breaks` to honour single-newline line breaks.
+ */
+const REMARK_PLUGINS = [...Object.values(defaultRemarkPlugins), remarkBreaks];
+
+/**
+ * Matches fumadocs-ui prose `:where(code)` styling (kept in sync with
+ * `lib/inline-code-text.tsx`) so inline code inside API prose reads the same as
+ * inline code in the surrounding MDX docs.
+ */
+const INLINE_CODE_CLASS =
+ 'rounded-[5px] border border-fd-border bg-fd-muted px-[0.3em] py-[0.15em] font-mono text-[0.85em] font-normal text-fd-foreground';
+
+/**
+ * Cross-reference link styling, carried over verbatim from `ApiTypeLink` so
+ * `{@link ...}` references resolved into markdown links keep their existing
+ * appearance: function/class purple, no rest-state underline, a subtle
+ * underline on hover.
+ */
+const LINK_CLASS =
+ 'text-api-fn underline decoration-current/0 underline-offset-2 transition-[text-decoration-color] hover:decoration-current/60';
+
+/**
+ * Renders a markdown link. Internal cross-references (resolved from
+ * `{@link ...}` to an absolute `/docs/...` path during the server pre-pass) use
+ * Next's ` ` for client-side navigation; anything else (absolute URLs in
+ * the upstream JSDoc) falls back to a new-tab anchor. Both share the API
+ * cross-reference styling so linkification never visually regresses.
+ */
+const MarkdownLink = ({ href, children }: ComponentProps<'a'>): ReactNode => {
+ if (typeof href === 'string' && href.startsWith('/')) {
+ return (
+
+ {children}
+
+ );
+ }
+ return (
+
+ {children}
+
+ );
+};
+
+const InlineCode = ({ children }: ComponentProps<'code'>): ReactNode => (
+ {children}
+);
+
+const Strong = ({ children }: ComponentProps<'strong'>): ReactNode => (
+ {children}
+);
+
+const Emphasis = ({ children }: ComponentProps<'em'>): ReactNode => {children} ;
+
+export type ApiMarkdownProps = {
+ /** Pre-resolved markdown (with `{@link ...}` already turned into links). */
+ readonly markdown: string;
+ /** Render as inline flow (no block paragraph margins). */
+ readonly inline?: boolean;
+ readonly className?: string;
+};
+
+/**
+ * Renders OCCT JSDoc prose as real markdown via Streamdown: bold, lists,
+ * inline code, fenced code blocks, tables, and paragraph/line breaks. Runs in
+ * static (non-streaming) mode with link-safety modals disabled and Shiki
+ * pinned to the GitHub light/dark themes that the rest of the API surface is
+ * sampled from.
+ *
+ * `remark-breaks` is added so the upstream JSDoc's single-newline line breaks
+ * (one logical statement per line) survive as visible breaks instead of being
+ * collapsed into run-on paragraphs.
+ *
+ * Inline mode collapses paragraphs to plain inline flow so short prose
+ * (parameter descriptions, `@returns`, `@remarks`, `@see`, `@deprecated`) reads
+ * as a sentence rather than a stacked block, while still resolving bold, inline
+ * code, and `{@link}` links.
+ */
+export const ApiMarkdown = ({ markdown, inline = false, className }: ApiMarkdownProps): ReactNode => {
+ if (inline) {
+ return (
+ {children} ,
+ inlineCode: ({ children }) => {children} ,
+ strong: ({ children }) => {children} ,
+ em: ({ children }) => {children} ,
+ p: ({ children }) => {children} ,
+ ul: ({ children }) => (
+
+ ),
+ ol: ({ children }) => (
+ {children}
+ ),
+ li: ({ children }) => {children} ,
+ }}
+ >
+ {markdown}
+
+ );
+ }
+
+ return (
+ {children} ,
+ inlineCode: ({ children }) => {children} ,
+ strong: ({ children }) => {children} ,
+ em: ({ children }) => {children} ,
+ p: ({ children }) => {children}
,
+ ul: ({ children }) => (
+
+ ),
+ ol: ({ children }) => (
+ {children}
+ ),
+ li: ({ children }) => {children} ,
+ h1: ({ children }) => {children} ,
+ h2: ({ children }) => {children} ,
+ h3: ({ children }) => {children} ,
+ h4: ({ children }) => {children} ,
+ blockquote: ({ children }) => (
+
+ {children}
+
+ ),
+ hr: () => ,
+ }}
+ >
+ {markdown}
+
+ );
+};
diff --git a/docs-site/components/api/api-module-index.tsx b/docs-site/components/api/api-module-index.tsx
new file mode 100644
index 00000000..864b81be
--- /dev/null
+++ b/docs-site/components/api/api-module-index.tsx
@@ -0,0 +1,55 @@
+import Link from 'next/link';
+import type { ReactNode } from 'react';
+import { loadIndex } from './api-data';
+
+const kebab = (input: string): string =>
+ input
+ .replace(/([a-z\d])([A-Z])/g, '$1-$2')
+ .replace(/([A-Z])([A-Z][a-z])/g, '$1-$2')
+ .toLowerCase();
+
+export type ApiModuleIndexProps = {
+ readonly moduleName: string;
+};
+
+/**
+ * Toolkit grid for a single OCCT module. Rendered inside Fumadocs'
+ * ``, which applies Tailwind Typography prose styles by default —
+ * `not-prose` opts the structured nav out so links don't pick up the
+ * underline-everything `prose a` rule.
+ */
+export const ApiModuleIndex = async ({ moduleName }: ApiModuleIndexProps): Promise => {
+ const index = await loadIndex();
+ const ocModule = index.modules.find((m) => m.name === moduleName);
+ if (!ocModule) {
+ return Unknown module: {moduleName}
;
+ }
+ const moduleSlug = kebab(ocModule.name);
+ return (
+
+
+ {ocModule.toolkits.map((toolkit) => (
+
+
+ {toolkit.name}
+
+
+ {toolkit.headline}
+
+
+ {toolkit.classCount}
+ {toolkit.classCount === 1 ? 'class' : 'classes'}
+ ·
+ {toolkit.packages.length}
+ {toolkit.packages.length === 1 ? 'package' : 'packages'}
+
+
+ ))}
+
+
+ );
+};
diff --git a/docs-site/components/api/api-package-page.tsx b/docs-site/components/api/api-package-page.tsx
new file mode 100644
index 00000000..8ca2854b
--- /dev/null
+++ b/docs-site/components/api/api-package-page.tsx
@@ -0,0 +1,88 @@
+import type { ReactNode } from 'react';
+import { slicePackageClasses } from '../../lib/api-package-pagination';
+import { loadShard } from './api-data';
+import { ApiClassCard } from './api-class-card';
+import { ApiHashHighlight } from './api-hash-highlight';
+import { ApiPackagePagination } from './api-package-pagination';
+
+export type ApiPackagePageProps = {
+ readonly shardKey: string;
+ readonly basePath: string;
+ readonly page: number;
+ readonly pageCount: number;
+ readonly classCount: number;
+};
+
+/**
+ * RSC. Reads the shard JSON at build time, renders one `ApiClassCard` per
+ * bound class inline, and generates a sidebar class jumplist. Build-time
+ * only — no client JS for the class cards themselves.
+ */
+export const ApiPackagePage = async ({
+ shardKey,
+ basePath,
+ page,
+ pageCount,
+ classCount,
+}: ApiPackagePageProps): Promise => {
+ const shard = await loadShard(shardKey);
+ const { slice: classes } = slicePackageClasses(shard.classes ?? [], page);
+
+ if (classes.length === 0) {
+ return (
+
+ No bound classes in this package.
+
+ );
+ }
+
+ return (
+
+
+
+
+
+
+
+ {classes.map((cls) => (
+
+ ))}
+
+
+ {pageCount > 1 ? (
+
+ ) : null}
+
+ );
+};
diff --git a/docs-site/components/api/api-package-pagination.tsx b/docs-site/components/api/api-package-pagination.tsx
new file mode 100644
index 00000000..8c81f113
--- /dev/null
+++ b/docs-site/components/api/api-package-pagination.tsx
@@ -0,0 +1,51 @@
+import Link from 'next/link';
+import type { ReactNode } from 'react';
+
+export type ApiPackagePaginationProps = {
+ readonly basePath: string;
+ readonly page: number;
+ readonly pageCount: number;
+ readonly classCount: number;
+};
+
+export const ApiPackagePagination = ({
+ basePath,
+ page,
+ pageCount,
+ classCount,
+}: ApiPackagePaginationProps): ReactNode => {
+ if (pageCount <= 1) return null;
+
+ const pageHref = (target: number): string =>
+ target === 1 ? basePath : `${basePath}/page-${target}`;
+
+ return (
+
+
+ Page {page} of {pageCount}
+ ({classCount} classes)
+
+
+ {page > 1 ? (
+
+ Previous
+
+ ) : null}
+ {page < pageCount ? (
+
+ Next
+
+ ) : null}
+
+
+ );
+};
diff --git a/docs-site/components/api/api-prose.tsx b/docs-site/components/api/api-prose.tsx
new file mode 100644
index 00000000..15dc7525
--- /dev/null
+++ b/docs-site/components/api/api-prose.tsx
@@ -0,0 +1,98 @@
+import type { ReactNode } from 'react';
+import { loadTypeIndex } from '../../lib/api-type-index';
+import { ApiMarkdown } from './api-markdown';
+
+export type ApiProseProps = {
+ readonly text: string;
+ /** Render as inline flow (parameter descriptions, `@returns`, `@see`, …). */
+ readonly inline?: boolean;
+ readonly className?: string;
+};
+
+const LINK_RE = /\{@link\s+([^}|]+?)(?:\s*\|\s*`?([^`}]+?)`?)?\s*\}/g;
+
+/**
+ * Splits prose into alternating non-code / code segments. Fenced blocks
+ * (```` ``` ````) and inline code (`` ` `` or `` `` ``) are captured so callers
+ * can transform only the prose between them.
+ */
+const CODE_SEGMENT_RE = /(```[\s\S]*?```|``[^`]*``|`[^`]*`)/g;
+
+const isCodeSegment = (segment: string): boolean => segment.startsWith('`');
+
+/**
+ * Strips one optional layer of backticks/whitespace from a `{@link}` label so
+ * it can be re-wrapped consistently as inline code in the emitted markdown.
+ */
+const cleanLabel = (raw: string): string => raw.trim().replace(/^`(.*)`$/s, '$1').trim();
+
+/**
+ * Escapes stray `<`/`>` that appear in prose (e.g. the C++ template arguments
+ * in `BRepGraph_Iterator`). Left unescaped, Streamdown's HTML
+ * sanitizer parses them as raw HTML tags and silently drops the enclosed text.
+ * Code spans and fenced blocks are skipped so C++ snippets containing `<`/`>`
+ * (and `&`) render verbatim.
+ */
+const escapeStrayHtml = (text: string): string =>
+ text
+ .split(CODE_SEGMENT_RE)
+ .map((segment) =>
+ isCodeSegment(segment)
+ ? segment
+ : segment.replace(/&(?![a-zA-Z#][a-zA-Z0-9]*;)/g, '&').replace(//g, '>'),
+ )
+ .join('');
+
+/**
+ * Resolves OCCT JSDoc prose into standard markdown so it can be rendered by
+ * `ApiMarkdown` (Streamdown). The only transform applied here is turning
+ * `{@link Target | Label}` references into markdown links — every other
+ * markdown construct (bold, lists, inline/fenced code, paragraphs) is authored
+ * in the upstream comment and passes through untouched.
+ *
+ * Targets are resolved against the build-time `data/api-type-index.json`:
+ *
+ * - resolved identifier → `[`Label`](/docs/.../shard#fragment)` (a real
+ * markdown link; the label stays wrapped in code so cross-references read as
+ * monospace identifiers, matching the previous `ApiTypeLink` rendering);
+ * - denylisted / unresolved identifier → `` `Label` `` (inline code, no link),
+ * so nothing turns into a dead link.
+ *
+ * Runs on the server (RSC) because the type index lives on disk.
+ */
+const resolveLinks = async (text: string): Promise => {
+ if (!text.includes('{@link')) return text;
+ const { denylist, entries } = await loadTypeIndex();
+ return text.replace(LINK_RE, (_match, rawTarget: string, rawLabel: string | undefined) => {
+ const target = rawTarget.trim();
+ const label = cleanLabel(rawLabel ?? target);
+ const code = `\`${label}\``;
+ if (denylist.has(target) || denylist.has(target.toLowerCase())) return code;
+ const hit = entries.get(target);
+ if (!hit) return code;
+ return `[${code}](${hit.url}#${hit.fragment})`;
+ });
+};
+
+const resolveProseMarkdown = async (text: string): Promise => {
+ if (!text) return '';
+ // Resolve `{@link}` first (targets may contain template `<...>`), then escape
+ // any remaining stray angle brackets in the prose. Resolved labels are wrapped
+ // in code spans, so the escape pass leaves them — and any C++ snippets —
+ // untouched.
+ const linked = await resolveLinks(text);
+ return escapeStrayHtml(linked);
+};
+
+/**
+ * Renders OCCT JSDoc prose as real markdown. `{@link Target | Label}`
+ * references are resolved to markdown links (cross-package navigation comes
+ * from the build-time `nameToHit` map) before the text is handed to
+ * `ApiMarkdown`, which renders bold, lists, inline/fenced code, tables, and
+ * paragraph/line breaks via Streamdown.
+ */
+export const ApiProse = async ({ text, inline, className }: ApiProseProps): Promise => {
+ if (!text) return undefined;
+ const markdown = await resolveProseMarkdown(text);
+ return ;
+};
diff --git a/docs-site/components/api/api-signature.tsx b/docs-site/components/api/api-signature.tsx
new file mode 100644
index 00000000..cbf28c55
--- /dev/null
+++ b/docs-site/components/api/api-signature.tsx
@@ -0,0 +1,84 @@
+import { Fragment } from 'react';
+import type { ReactNode } from 'react';
+import { ApiTypeLink } from './api-type-link';
+import type { ApiMethod, ApiParameter } from './types';
+
+const IDENT_RE = /([A-Za-z_]\w*)/g;
+
+/**
+ * Splits a raw type string into linkified tokens. Identifiers run through
+ * `ApiTypeLink` (keywords take the keyword hue, types take the type hue);
+ * everything else (punctuation, generics, whitespace) is preserved verbatim
+ * and tinted with the muted foreground, matching VSCode's treatment of
+ * punctuation in a type annotation.
+ */
+const renderTypeTokens = (raw: string): ReactNode[] => {
+ const out: ReactNode[] = [];
+ let cursor = 0;
+ for (const match of raw.matchAll(IDENT_RE)) {
+ if (match.index === undefined) continue;
+ if (match.index > cursor) {
+ out.push(
+
+ {raw.slice(cursor, match.index)}
+ ,
+ );
+ }
+ out.push( );
+ cursor = match.index + match[0].length;
+ }
+ if (cursor < raw.length) {
+ out.push(
+
+ {raw.slice(cursor)}
+ ,
+ );
+ }
+ return out;
+};
+
+const renderParameter = (param: ApiParameter, idx: number): ReactNode => {
+ const prefix = param.rest ? '...' : '';
+ const opt = param.optional ? '?' : '';
+ return (
+
+ {prefix ? {prefix} : undefined}
+ {param.name}
+ {opt ? {opt} : undefined}
+ :
+ {renderTypeTokens(param.type)}
+
+ );
+};
+
+export type ApiSignatureProps = {
+ readonly method: ApiMethod;
+};
+
+/**
+ * Overload-aware signature renderer. Tokens are coloured to match VSCode's
+ * default TypeScript semantic highlighting:
+ *
+ * keyword magenta (keywords, via `ApiTypeLink`)
+ * type / class teal (OCCT class identifiers, primitive types)
+ * variable foreground (parameter names)
+ * punctuation muted (brackets, `:`, `,`, `?`, `...`, separators)
+ */
+export const ApiSignature = ({ method }: ApiSignatureProps): ReactNode => {
+ const params = (method.parameters ?? []).map(renderParameter);
+ const ret = method.returnType ?? 'void';
+ return (
+
+ (
+ {params.map((node, idx) => (
+
+ {idx > 0 ? , : undefined}
+ {node}
+
+ ))}
+ )
+ :
+ {renderTypeTokens(ret)}
+
+ );
+};
diff --git a/docs-site/components/api/api-toolkit-index.tsx b/docs-site/components/api/api-toolkit-index.tsx
new file mode 100644
index 00000000..9186c2dc
--- /dev/null
+++ b/docs-site/components/api/api-toolkit-index.tsx
@@ -0,0 +1,57 @@
+import Link from 'next/link';
+import type { ReactNode } from 'react';
+import { loadIndex } from './api-data';
+
+const kebab = (input: string): string =>
+ input
+ .replace(/([a-z\d])([A-Z])/g, '$1-$2')
+ .replace(/([A-Z])([A-Z][a-z])/g, '$1-$2')
+ .toLowerCase();
+
+export type ApiToolkitIndexProps = {
+ readonly moduleName: string;
+ readonly toolkitName: string;
+};
+
+/**
+ * Package grid for a single toolkit. Uses `not-prose` to opt out of
+ * Fumadocs prose typography (which underlines every link by default).
+ */
+export const ApiToolkitIndex = async ({
+ moduleName,
+ toolkitName,
+}: ApiToolkitIndexProps): Promise => {
+ const index = await loadIndex();
+ const ocModule = index.modules.find((m) => m.name === moduleName);
+ const toolkit = ocModule?.toolkits.find((t) => t.name === toolkitName);
+ if (!ocModule || !toolkit) {
+ return (
+
+ Unknown toolkit: {moduleName}/{toolkitName}
+
+ );
+ }
+ const moduleSlug = kebab(ocModule.name);
+ const toolkitSlug = kebab(toolkit.name);
+ return (
+
+
+ {toolkit.packages.map((pkg) => (
+
+
+ {pkg.name}
+
+
+ {pkg.classes.length}
+ {pkg.classes.length === 1 ? 'class' : 'classes'}
+
+
+ ))}
+
+
+ );
+};
diff --git a/docs-site/components/api/api-type-link.tsx b/docs-site/components/api/api-type-link.tsx
new file mode 100644
index 00000000..2239e7ae
--- /dev/null
+++ b/docs-site/components/api/api-type-link.tsx
@@ -0,0 +1,89 @@
+import Link from 'next/link';
+import type { ReactNode } from 'react';
+import { loadTypeIndex } from '../../lib/api-type-index';
+
+export type ApiTypeLinkProps = {
+ readonly name: string;
+ readonly children?: ReactNode;
+ /**
+ * Colour tone for the rendered token:
+ * - `type` (default) — VSCode semantic highlighting for a type position:
+ * keywords take the keyword hue, everything else (primitives, resolved
+ * and unresolved OCCT identifiers) takes the type hue.
+ * - `plain` — foreground colour regardless of resolution. Used by the
+ * `extends` inheritance chip, which the design keeps as a quiet,
+ * foreground-coloured chip rather than a coloured type reference.
+ */
+ readonly tone?: 'type' | 'plain';
+};
+
+/**
+ * TypeScript keywords that the build-time denylist
+ * (`data/api-type-index.json`) lumps together with primitive type names.
+ * VSCode's semantic highlighting colours these two groups differently — true
+ * keywords (`extends`, `readonly`, …) take the keyword hue, while primitive
+ * types (`void`, `boolean`, `number`, …) take the type hue — so we split the
+ * flat denylist back apart here.
+ */
+const TS_KEYWORDS = new Set([
+ 'readonly',
+ 'infer',
+ 'abstract',
+ 'declare',
+ 'extends',
+ 'implements',
+ 'keyof',
+ 'this',
+ 'return',
+ 'new',
+ 'typeof',
+]);
+
+/**
+ * Inline type reference. Colours follow VSCode's default TypeScript semantic
+ * highlighting so a signature reads like the editor would render it:
+ *
+ * - TypeScript keywords (`readonly`, `extends`, …) → keyword hue, no link.
+ * - Primitive types (`void`, `boolean`, `number`, …) → type hue, no link.
+ * - Resolved OCCT identifiers (`TopoDS_Face`, `Geom_Surface`, …) → type hue,
+ * navigable Next link with a subtle hover underline (no rest-state
+ * underline — matches the rest of the API surface).
+ * - Unresolved identifiers → type hue, no link (still a type position).
+ *
+ * With `tone="plain"` every branch renders in plain foreground instead, used
+ * by the `extends` inheritance chip.
+ *
+ * Resolution data comes from the build-time `data/api-type-index.json`.
+ * Async RSC — no client JS for the lookup.
+ */
+export const ApiTypeLink = async ({
+ name,
+ children,
+ tone = 'type',
+}: ApiTypeLinkProps): Promise => {
+ const trimmed = name.trim();
+ const label = children ?? trimmed;
+ const { denylist, entries } = await loadTypeIndex();
+
+ if (denylist.has(trimmed) || denylist.has(trimmed.toLowerCase())) {
+ const isKeyword = TS_KEYWORDS.has(trimmed) || TS_KEYWORDS.has(trimmed.toLowerCase());
+ const keywordClass = isKeyword ? 'text-api-keyword' : 'text-api-type';
+ return {label} ;
+ }
+
+ const colorClass = tone === 'plain' ? 'text-fd-foreground' : 'text-api-type';
+ const hit = entries.get(trimmed);
+ if (!hit) {
+ return {label} ;
+ }
+ return (
+
+ {label}
+
+ );
+};
diff --git a/docs-site/components/api/parse-comment.ts b/docs-site/components/api/parse-comment.ts
new file mode 100644
index 00000000..151006db
--- /dev/null
+++ b/docs-site/components/api/parse-comment.ts
@@ -0,0 +1,128 @@
+/**
+ * Parses an OCCT-flavored JSDoc comment into a structured shape so the
+ * renderer can lay out each tag in its own dedicated section instead of
+ * dumping the raw text (`@param ... @returns ...`) into a single paragraph.
+ *
+ * Observed tag inventory across all shipped shards (May 2026):
+ *
+ * @param — 10045 occurrences (by far the most common; each binds a
+ * description to one of the method's typed parameters)
+ * @returns — 3051 occurrences
+ * @link — 858 occurrences (handled separately by `ApiProse`)
+ * @remarks — 243 occurrences
+ * @deprecated — 172 occurrences
+ * @see — 44 occurrences
+ * @Returns — 2 occurrences (capitalisation typo upstream; aliased)
+ *
+ * `{@link ...}` references stay embedded in each description fragment and
+ * are resolved downstream by `ApiProse`, so the parser deliberately does
+ * not try to interpret them itself.
+ */
+
+export type ParsedComment = {
+ readonly description: string;
+ readonly params: ReadonlyMap;
+ readonly returns: string | null;
+ readonly remarks: string | null;
+ readonly deprecated: string | null;
+ readonly see: readonly string[];
+};
+
+const EMPTY: ParsedComment = {
+ description: '',
+ params: new Map(),
+ returns: null,
+ remarks: null,
+ deprecated: null,
+ see: [],
+};
+
+/**
+ * A block-level tag boundary. Tags are matched only at the start of a line
+ * after optional whitespace; this prevents stray `@param` strings inside
+ * the description body from being treated as section delimiters. The regex
+ * also tolerates one-leading-asterisk prose (OCCT JSDoc sometimes retains
+ * the leading `*` even after the bindgen strip).
+ */
+const BLOCK_TAG_RE = /(^|\n)\s*\*?\s*@([a-zA-Z]+)\b[ \t]*/g;
+
+const collapseWhitespace = (text: string): string =>
+ text.replace(/[ \t]+\n/g, '\n').replace(/\n{3,}/g, '\n\n').trim();
+
+/**
+ * Split a `@param` body into `(name, description)`. The first whitespace-
+ * separated token is the parameter name; the rest is its description.
+ * Handles the upstream pattern `@param theFoo description ...` and
+ * gracefully degrades when the description is empty.
+ */
+const splitParam = (raw: string): { name: string; description: string } | null => {
+ const trimmed = raw.trim();
+ if (!trimmed) return null;
+ const match = trimmed.match(/^([A-Za-z_][\w$]*)\s*(.*)$/s);
+ if (!match) return null;
+ return { name: match[1]!, description: match[2]!.trim() };
+};
+
+export const parseComment = (raw: string | undefined | null): ParsedComment => {
+ if (!raw || !raw.trim()) return EMPTY;
+
+ const segments: Array<{ tag: string | null; body: string }> = [];
+ let cursor = 0;
+ let currentTag: string | null = null;
+
+ BLOCK_TAG_RE.lastIndex = 0;
+ for (const match of raw.matchAll(BLOCK_TAG_RE)) {
+ const startOfTag = match.index! + match[1]!.length;
+ segments.push({ tag: currentTag, body: raw.slice(cursor, startOfTag) });
+ currentTag = match[2]!.toLowerCase();
+ cursor = match.index! + match[0].length;
+ }
+ // Always push the trailing segment, even when its body is empty — this is
+ // what makes a body-less `@deprecated` register as a present-but-empty
+ // marker rather than disappearing entirely.
+ segments.push({ tag: currentTag, body: raw.slice(cursor) });
+
+ let description = '';
+ const params = new Map();
+ let returns: string | null = null;
+ let remarks: string | null = null;
+ let deprecated: string | null = null;
+ const see: string[] = [];
+
+ for (const seg of segments) {
+ const body = collapseWhitespace(seg.body);
+ if (seg.tag === null) {
+ description = body;
+ continue;
+ }
+ switch (seg.tag) {
+ case 'param': {
+ const parsed = splitParam(body);
+ if (parsed && parsed.name) params.set(parsed.name, parsed.description);
+ break;
+ }
+ case 'returns':
+ case 'return': {
+ returns = body || returns;
+ break;
+ }
+ case 'remarks':
+ case 'remark': {
+ remarks = body || remarks;
+ break;
+ }
+ case 'deprecated': {
+ deprecated = body || '';
+ break;
+ }
+ case 'see': {
+ if (body) see.push(body);
+ break;
+ }
+ default:
+ break;
+ }
+ }
+
+ return { description, params, returns, remarks, deprecated, see };
+};
diff --git a/docs-site/components/api/types.ts b/docs-site/components/api/types.ts
new file mode 100644
index 00000000..b98f3a8a
--- /dev/null
+++ b/docs-site/components/api/types.ts
@@ -0,0 +1,166 @@
+export type ApiParameter = {
+ readonly name: string;
+ readonly type: string;
+ readonly optional: boolean;
+ readonly rest: boolean;
+};
+
+export type ApiMethod = {
+ readonly name: string;
+ readonly signature: string;
+ readonly parameters: readonly ApiParameter[];
+ readonly returnType: string;
+ readonly comment: string;
+};
+
+export type ApiProperty = {
+ readonly name: string;
+ readonly type: string;
+ readonly comment: string;
+ readonly readonly?: boolean;
+};
+
+export type ApiClass = {
+ readonly name: string;
+ readonly kind: 'class' | 'interface';
+ readonly summary: string;
+ readonly extends: readonly string[];
+ readonly ancestors: readonly string[] | Record;
+ readonly constructors: readonly ApiMethod[];
+ readonly staticMethods: readonly ApiMethod[];
+ readonly instanceMethods: readonly ApiMethod[];
+ readonly properties: readonly ApiProperty[];
+};
+
+export type ApiShard = {
+ readonly schema: number;
+ readonly shard: string;
+ readonly generatedAt: string;
+ readonly classes: readonly ApiClass[];
+};
+
+export type ApiManifest = {
+ readonly wasm_bytes?: number;
+ readonly validation_passed?: boolean;
+ readonly requested?: number;
+ readonly compiled?: number;
+ readonly built_at?: string;
+};
+
+export type ApiIndexPackage = {
+ readonly name: string;
+ readonly shard: string;
+ readonly classes: ReadonlyArray<{
+ readonly name: string;
+ readonly kind: string;
+ readonly extends: readonly string[];
+ readonly summary: string;
+ readonly members: { readonly constructors: number; readonly staticMethods: number; readonly instanceMethods: number; readonly properties: number };
+ }>;
+};
+
+export type ApiIndexToolkit = {
+ readonly name: string;
+ readonly headline: string;
+ readonly classCount: number;
+ readonly packages: readonly ApiIndexPackage[];
+};
+
+export type ApiIndexModule = {
+ readonly name: string;
+ readonly headline: string;
+ readonly classCount: number;
+ readonly toolkitCount: number;
+ readonly toolkits: readonly ApiIndexToolkit[];
+};
+
+export type ApiIndex = {
+ readonly schema: number;
+ readonly manifest: ApiManifest;
+ readonly totals: {
+ readonly modules: number;
+ readonly toolkits: number;
+ readonly packages: number;
+ readonly classes: number;
+ readonly searchEntries: number;
+ };
+ readonly quickLinks: ReadonlyArray<{
+ readonly name: string;
+ readonly kind: string;
+ readonly p: string;
+ readonly s: string;
+ }>;
+ readonly modules: readonly ApiIndexModule[];
+ readonly searchIndex: ReadonlyArray<{
+ readonly n: string;
+ readonly k: string;
+ readonly p: string;
+ readonly s: string;
+ readonly a: string;
+ readonly q: string;
+ }>;
+};
+
+export type ApiSearchEntry = {
+ readonly id: string;
+ readonly title: string;
+ readonly description: string;
+ readonly url: string;
+ readonly tag: string;
+ readonly structured: { contents: ReadonlyArray<{ heading: string; content: string }> };
+};
+
+export type MemberKind = 'ctor' | 'static' | 'inst' | 'prop';
+
+/**
+ * Anchor token for a member. Constructors render under the literal
+ * `Constructor` token (the upstream JSDoc names them `constructor`, but the
+ * capitalised, kind-agnostic token reads better in a URL and avoids clashing
+ * with the TypeScript keyword); every other member uses its real name.
+ */
+const anchorToken = (kind: MemberKind, name: string): string =>
+ kind === 'ctor' ? 'Constructor' : name;
+
+/**
+ * Builds deterministic, human-readable anchor ids for every member of a class.
+ *
+ * Scheme: `-`. The hyphen is the single level
+ * separator as we descend from class to member, so the underscores inside
+ * OCCT class names (`Message_Gravity`) and member/enum-value names
+ * (`Message_Trace`) stay unambiguous — e.g. `Message_Gravity-Message_Trace`.
+ *
+ * Overloaded members (and multi-constructor classes) get a 0-indexed ordinal
+ * appended directly to the token: `…-Clear0`, `…-Clear1`, `…-Constructor0`,
+ * `…-Constructor1`. The ordinal is the member's position within its own
+ * same-token group, counted in stable declaration order, so adding an
+ * *unrelated* member never shifts an existing anchor. Members whose token is
+ * unique in the class stay clean with no number (`…-GetAlerts`).
+ *
+ * The result is keyed by `:` (the member's kind + array index)
+ * so the caller can map each rendered row back to its anchor. Returned ids are
+ * collision-free: distinct tokens differ by token, shared tokens differ by
+ * ordinal.
+ */
+export const buildClassAnchorMap = (cls: ApiClass): ReadonlyMap => {
+ const entries: ReadonlyArray<{ readonly key: string; readonly token: string }> = [
+ ...cls.constructors.map((_, i) => ({ key: `ctor:${i}`, token: anchorToken('ctor', 'constructor') })),
+ ...cls.staticMethods.map((m, i) => ({ key: `static:${i}`, token: anchorToken('static', m.name) })),
+ ...cls.instanceMethods.map((m, i) => ({ key: `inst:${i}`, token: anchorToken('inst', m.name) })),
+ ...cls.properties.map((p, i) => ({ key: `prop:${i}`, token: anchorToken('prop', p.name) })),
+ ];
+
+ const totalByToken = new Map();
+ for (const entry of entries) {
+ totalByToken.set(entry.token, (totalByToken.get(entry.token) ?? 0) + 1);
+ }
+
+ const ordinalByToken = new Map();
+ const anchors = new Map();
+ for (const entry of entries) {
+ const ordinal = ordinalByToken.get(entry.token) ?? 0;
+ ordinalByToken.set(entry.token, ordinal + 1);
+ const needsOrdinal = (totalByToken.get(entry.token) ?? 1) > 1;
+ anchors.set(entry.key, `${cls.name}-${entry.token}${needsOrdinal ? ordinal : ''}`);
+ }
+ return anchors;
+};
diff --git a/docs-site/components/home-footer.tsx b/docs-site/components/home-footer.tsx
new file mode 100644
index 00000000..8db29e17
--- /dev/null
+++ b/docs-site/components/home-footer.tsx
@@ -0,0 +1,93 @@
+import Link from 'next/link';
+import type { ReactNode } from 'react';
+import { GITHUB_REPO_URL } from '../lib/site';
+
+const UPSTREAM_REPO_URL = 'https://github.com/donalffons/opencascade.js';
+const LICENSE_URL = `${GITHUB_REPO_URL}/blob/master/LICENSE`;
+
+const footerLinkClass = 'text-fd-muted-foreground hover:text-fd-primary hover:underline';
+
+const FooterColumn = ({
+ title,
+ children,
+}: {
+ readonly title: string;
+ readonly children: ReactNode;
+}): ReactNode => (
+
+);
+
+const FooterExternalLink = ({
+ href,
+ children,
+}: {
+ readonly href: string;
+ readonly children: ReactNode;
+}): ReactNode => (
+
+ {children}
+
+);
+
+export const HomeFooter = (): ReactNode => {
+ return (
+
+
+
+
+ GitHub repository
+
+
+ Discussions
+
+
+ Issues
+
+
+
+
+
+
+ llms.txt
+
+
+
+
+ llms-full.txt
+
+
+
+
+ API reference
+
+
+
+
+
+
+ LGPL-2.1-only WITH OCCT Exception
+
+
+ Maintained by Tau
+
+
+
+ FAQ
+
+
+
+
+
+
+ OpenCascade.js — fork of{' '}
+
+ donalffons/opencascade.js
+
+ . Upstream OCCT © OPEN CASCADE SAS.
+
+
+ );
+};
diff --git a/docs-site/components/mermaid.tsx b/docs-site/components/mermaid.tsx
new file mode 100644
index 00000000..2624d0d5
--- /dev/null
+++ b/docs-site/components/mermaid.tsx
@@ -0,0 +1,88 @@
+'use client';
+
+import { useEffect, useRef, useState } from 'react';
+import type { ReactNode } from 'react';
+
+const fontFamily = "'Inter', ui-sans-serif, system-ui, sans-serif";
+
+let mermaidIdCounter = 0;
+
+const MermaidRenderer = ({ chart }: { readonly chart: string }): ReactNode => {
+ const [id] = useState(() => `mermaid-${mermaidIdCounter++}`);
+ const [svg, setSvg] = useState();
+ const [isDark, setIsDark] = useState(false);
+ const containerRef = useRef(null);
+ const bindFunctionsRef = useRef<((element: Element) => void) | undefined>(undefined);
+
+ useEffect(() => {
+ const media = globalThis.matchMedia?.('(prefers-color-scheme: dark)');
+ const detect = (): void => {
+ const root = document.documentElement;
+ setIsDark(root.classList.contains('dark') || media?.matches === true);
+ };
+ detect();
+ const observer = new MutationObserver(detect);
+ observer.observe(document.documentElement, { attributes: true, attributeFilter: ['class'] });
+ media?.addEventListener('change', detect);
+ return () => {
+ observer.disconnect();
+ media?.removeEventListener('change', detect);
+ };
+ }, []);
+
+ useEffect(() => {
+ let cancelled = false;
+ // Reset render state when chart/theme inputs change.
+ // eslint-disable-next-line react-hooks/set-state-in-effect -- async mermaid render owns the follow-up setState
+ setSvg(undefined);
+
+ void (async () => {
+ const { default: mermaid } = await import('mermaid');
+ if (cancelled) return;
+
+ mermaid.initialize({
+ startOnLoad: false,
+ securityLevel: 'loose',
+ fontFamily,
+ theme: isDark ? 'dark' : 'default',
+ flowchart: { curve: 'basis', padding: 20 },
+ });
+
+ const result = await mermaid.render(id, chart.replaceAll(String.raw`\n`, '\n'));
+ if (cancelled) return;
+ bindFunctionsRef.current = result.bindFunctions;
+ setSvg(result.svg);
+ })();
+
+ return () => {
+ cancelled = true;
+ };
+ }, [chart, isDark, id]);
+
+ useEffect(() => {
+ if (containerRef.current && bindFunctionsRef.current) {
+ bindFunctionsRef.current(containerRef.current);
+ bindFunctionsRef.current = undefined;
+ }
+ }, [svg]);
+
+ if (!svg) return undefined;
+
+ return (
+
+ );
+};
+
+/**
+ * Renders a Mermaid diagram from chart definition text. Client-only.
+ */
+export const Mermaid = ({ chart }: { readonly chart: string }): ReactNode => {
+ return ;
+};
diff --git a/docs-site/components/ocjs-example.tsx b/docs-site/components/ocjs-example.tsx
new file mode 100644
index 00000000..ab05aaaf
--- /dev/null
+++ b/docs-site/components/ocjs-example.tsx
@@ -0,0 +1,104 @@
+'use client';
+
+import { useEffect, useState } from 'react';
+import type { ReactNode } from 'react';
+import { ThreeViewer } from './three-viewer';
+
+export type OcjsExampleProps = {
+ readonly title: string;
+ readonly description?: string;
+ /** Raw TypeScript source string — typically supplied via a server-side `?raw` import. */
+ readonly source: string;
+ /** Function returning a GLB byte array. Receives the lazy-initialised OCCT module. */
+ readonly run: (oc: unknown) => Promise;
+ readonly defaultOpen?: boolean;
+};
+
+const initState: { promise?: Promise } = {};
+const lazyInitOcct = async (): Promise => {
+ if (!initState.promise) {
+ initState.promise = (async () => {
+ const initModule: { default: (options?: { locateFile?: (file: string) => string }) => Promise } =
+ await import('@taucad/opencascade.js');
+ return initModule.default({
+ locateFile: (file: string) => `/${file}`,
+ });
+ })();
+ }
+ return initState.promise;
+};
+
+/**
+ * Embeds a runnable OCCT example inside an MDX page. The `run` callback is
+ * executed in the browser against a lazily-initialised `@taucad/opencascade.js`
+ * instance and the resulting GLB bytes are handed to ``.
+ */
+export const OcjsExample = ({
+ title,
+ description,
+ source,
+ run,
+ defaultOpen = false,
+}: OcjsExampleProps): ReactNode => {
+ const [glb, setGlb] = useState(undefined);
+ const [error, setError] = useState(undefined);
+ const [sourceOpen, setSourceOpen] = useState(defaultOpen);
+ const [running, setRunning] = useState(true);
+
+ useEffect(() => {
+ let cancelled = false;
+ // eslint-disable-next-line react-hooks/set-state-in-effect -- async example runner owns the follow-up setState
+ setRunning(true);
+ setError(undefined);
+ void (async () => {
+ try {
+ const oc = await lazyInitOcct();
+ const bytes = await run(oc);
+ if (cancelled) return;
+ setGlb(bytes);
+ } catch (caught: unknown) {
+ if (cancelled) return;
+ setError(caught instanceof Error ? caught.message : String(caught));
+ } finally {
+ if (!cancelled) setRunning(false);
+ }
+ })();
+ return () => {
+ cancelled = true;
+ };
+ }, [run]);
+
+ return (
+
+
+
+
{title}
+ {description ? (
+
{description}
+ ) : undefined}
+
+ setSourceOpen((open) => !open)}
+ className="text-xs text-fd-muted-foreground hover:text-fd-foreground"
+ >
+ {sourceOpen ? 'Hide source' : 'Show source'}
+
+
+
+ {running ? (
+
Initialising OCCT…
+ ) : undefined}
+ {error ? (
+
Example failed: {error}
+ ) : undefined}
+ {glb ?
: undefined}
+
+ {sourceOpen ? (
+
+ {source}
+
+ ) : undefined}
+
+ );
+};
diff --git a/docs-site/components/tag-badge.tsx b/docs-site/components/tag-badge.tsx
new file mode 100644
index 00000000..acf855c2
--- /dev/null
+++ b/docs-site/components/tag-badge.tsx
@@ -0,0 +1,36 @@
+'use client';
+
+import { useState } from 'react';
+import type { ReactNode } from 'react';
+
+export type TagBadgeProps = {
+ /** GHCR tag, e.g. `ghcr.io/taucad/opencascade.js:3.0.0-beta.5` */
+ readonly tag: string;
+ readonly label?: string;
+};
+
+/**
+ * Inline pill rendering a container image / GHCR tag with one-click copy.
+ */
+export const TagBadge = ({ tag, label }: TagBadgeProps): ReactNode => {
+ const [copied, setCopied] = useState(false);
+ const display = label ?? tag;
+
+ const handleClick = async (): Promise => {
+ await globalThis.navigator?.clipboard?.writeText(tag);
+ setCopied(true);
+ globalThis.setTimeout?.(() => setCopied(false), 1200);
+ };
+
+ return (
+
+ {copied ? '✓' : '📋'}
+ {display}
+
+ );
+};
diff --git a/docs-site/components/three-viewer.tsx b/docs-site/components/three-viewer.tsx
new file mode 100644
index 00000000..d343d629
--- /dev/null
+++ b/docs-site/components/three-viewer.tsx
@@ -0,0 +1,95 @@
+'use client';
+
+import { useEffect, useRef } from 'react';
+import type { ReactNode } from 'react';
+
+export type ThreeViewerProps = {
+ readonly glb: Uint8Array | undefined;
+ readonly height?: number;
+ readonly background?: number;
+};
+
+/**
+ * Tiny three.js GLB viewer with orbit controls. Used inside ``
+ * to render the result of an in-browser OCCT example. Mounts client-only.
+ */
+export const ThreeViewer = ({
+ glb,
+ height = 360,
+ background = 0x111111,
+}: ThreeViewerProps): ReactNode => {
+ const containerRef = useRef(null);
+
+ useEffect(() => {
+ if (!glb || !containerRef.current) return;
+
+ let cancelled = false;
+ let cleanup: (() => void) | undefined;
+
+ void (async () => {
+ const THREE = await import('three');
+ const { GLTFLoader } = await import('three/examples/jsm/loaders/GLTFLoader.js');
+ const { OrbitControls } = await import('three/examples/jsm/controls/OrbitControls.js');
+ if (cancelled || !containerRef.current) return;
+
+ const container = containerRef.current;
+ const width = container.clientWidth || 600;
+
+ const scene = new THREE.Scene();
+ scene.background = new THREE.Color(background);
+
+ const camera = new THREE.PerspectiveCamera(45, width / height, 0.1, 5000);
+ camera.position.set(100, 100, 100);
+
+ scene.add(new THREE.AmbientLight(0xffffff, 0.5));
+ const dirLight = new THREE.DirectionalLight(0xffffff, 1);
+ dirLight.position.set(1, 1, 1);
+ scene.add(dirLight);
+
+ const renderer = new THREE.WebGLRenderer({ antialias: true });
+ renderer.setSize(width, height, false);
+ renderer.setPixelRatio(globalThis.devicePixelRatio || 1);
+ container.replaceChildren(renderer.domElement);
+
+ const controls = new OrbitControls(camera, renderer.domElement);
+ controls.target.set(0, 0, 0);
+
+ const loader = new GLTFLoader();
+ const blob = new Blob([glb as BlobPart], { type: 'model/gltf-binary' });
+ const url = URL.createObjectURL(blob);
+ loader.load(url, (gltf) => {
+ scene.add(gltf.scene);
+ URL.revokeObjectURL(url);
+ });
+
+ let raf = 0;
+ const tick = (): void => {
+ controls.update();
+ renderer.render(scene, camera);
+ raf = globalThis.requestAnimationFrame(tick);
+ };
+ tick();
+
+ cleanup = () => {
+ globalThis.cancelAnimationFrame(raf);
+ controls.dispose();
+ renderer.dispose();
+ container.replaceChildren();
+ };
+ })();
+
+ return () => {
+ cancelled = true;
+ cleanup?.();
+ };
+ }, [glb, height, background]);
+
+ return (
+
+ );
+};
diff --git a/docs-site/content/docs/meta.json b/docs-site/content/docs/meta.json
new file mode 100644
index 00000000..320cd42d
--- /dev/null
+++ b/docs-site/content/docs/meta.json
@@ -0,0 +1,4 @@
+{
+ "title": "OpenCascade.js",
+ "pages": ["package", "toolchain"]
+}
diff --git a/docs-site/content/docs/package/concepts/calling-occt-from-js.mdx b/docs-site/content/docs/package/concepts/calling-occt-from-js.mdx
new file mode 100644
index 00000000..eba4807c
--- /dev/null
+++ b/docs-site/content/docs/package/concepts/calling-occt-from-js.mdx
@@ -0,0 +1,167 @@
+---
+title: Calling OCCT from JavaScript
+description: How OCCT C++ surfaces project into JS — suffix-free overloads, val-dispatched calls, string enums, default args, and the TopoDS bridge.
+---
+
+The OCJS bindings present OCCT to JavaScript through a handful of conventions
+that hide most of the C++ idioms. This page covers the call-site rules that
+apply to every API surface — constructors, methods, statics, and downcasts. For
+the shape of what comes back, see [Return shapes](./return-shapes).
+
+## A worked example, top to bottom
+
+Most of the rules below show up in this 8-line construction of an arc-edge:
+
+```typescript
+using p1 = new oc.gp_Pnt(0, 0, 0);
+using p2 = new oc.gp_Pnt(5, 0, 5);
+using p3 = new oc.gp_Pnt(10, 0, 0);
+using arcMaker = new oc.GC_MakeArcOfCircle(p1, p2, p3);
+using curve = arcMaker.Value(); // Geom_TrimmedCurve smart pointer
+using edge = new oc.BRepBuilderAPI_MakeEdge(curve);
+using shape = edge.Edge(); // TopoDS_Edge
+using wire = new oc.BRepBuilderAPI_MakeWire(shape);
+```
+
+No `_2` / `_3` suffixes. No `Handle_*` wrappers. No `.get()` unwraps. No
+manual `.delete()`. The rest of the page explains why each line works.
+
+## No more `_N` overload suffixes
+
+OCJS V3 removed the legacy `_N` overload suffixes. You always call the
+suffix-free constructor or method; the runtime picks the right overload based
+on arity and argument shape.
+
+```typescript
+using p = new oc.gp_Pnt(1, 2, 3); // not gp_Pnt_3
+using box1 = new oc.BRepPrimAPI_MakeBox(10, 20, 30);
+using origin = new oc.gp_Pnt(1, 2, 3);
+using box2 = new oc.BRepPrimAPI_MakeBox(origin, 10, 20, 30);
+using corner = new oc.gp_Pnt(5, 10, 15);
+using box3 = new oc.BRepPrimAPI_MakeBox(origin, corner);
+```
+
+`gp_Pnt`, `BRepPrimAPI_MakeBox`, `BRepBuilderAPI_MakeEdge` — every multi-arity
+constructor surface works this way.
+
+## Overload dispatch is by argument shape
+
+Same-arity overloads are picked at call time by a small JS-side dispatcher.
+You don't pick the overload — you pass arguments of the right shape and the
+binding routes the call.
+
+Three kinds of dispatch you'll see most often:
+
+- **By class type** — `BRepBuilderAPI_MakeEdge(gp_Pnt, gp_Pnt)` and
+ `BRepBuilderAPI_MakeEdge(TopoDS_Vertex, TopoDS_Vertex)` both have arity 2;
+ the dispatcher routes by `instanceof`.
+- **By integer vs float** — `gp_XY.SetCoord(1, 5.0)` routes to the indexed
+ overload (`Number.isInteger(1) === true`). Float-only forms use the
+ coordinate overload.
+- **By enum value** — passing `oc.IntSurf_TypeTrans.IntSurf_In` selects the
+ enum-tagged constructor variant.
+
+Where C++ has parallel `int` and `size_t` overloads the bindgen collapses them
+to a single JS signature. `list.FindKey(1)` works without disambiguation.
+
+## Methods returning values use `()`
+
+Every value-returning accessor is a method call, not a property. The most
+common gotcha is reading a `gp_Pnt` as if its coordinates were fields:
+
+```typescript
+// Right — method calls.
+using p = new oc.gp_Pnt(1, 2, 3);
+console.log(p.X(), p.Y(), p.Z()); // 1 2 3
+
+// Wrong — these are the bound functions, not numbers.
+console.log(p.X, p.Y, p.Z); // [Function: X] [Function: Y] [Function: Z]
+```
+
+The same rule applies to `face.IsNull()`, `list.Size()`, `curve.FirstParameter()`,
+and every other "looks like a getter" surface in the binding.
+
+## Enums are string-valued object members
+
+Every C++ enum is exposed as a plain JS object whose members are strings whose
+value equals the member name:
+
+```typescript
+oc.TopAbs_ShapeEnum.TopAbs_EDGE === 'TopAbs_EDGE'; // true
+oc.TopAbs_Orientation.TopAbs_FORWARD === 'TopAbs_FORWARD';
+```
+
+Always reach for the object-member spelling — it's the form IntelliSense
+surfaces, the bindings emit `.d.ts` types for, and the smoke tests use:
+
+```typescript
+using box = new oc.BRepPrimAPI_MakeBox(10, 10, 10);
+using shape = box.Shape();
+using explorer = new oc.TopExp_Explorer(
+ shape,
+ oc.TopAbs_ShapeEnum.TopAbs_FACE,
+ oc.TopAbs_ShapeEnum.TopAbs_SHAPE,
+);
+```
+
+Enum-typed return values are strings too:
+
+```typescript
+const transition = aline.TransitionOnS1(); // 'IntSurf_In'
+```
+
+There is no `.value` accessor — the member already _is_ the value.
+
+## Trailing default args fill themselves
+
+C++ default arguments work the way you'd expect: omit trailing parameters and
+the binding fills the C++ defaults.
+
+```typescript
+// BRepMesh_IncrementalMesh(shape, linearDeflection, isRelative=false,
+// angDeflection=0.5, isInParallel=false)
+using mesh = new oc.BRepMesh_IncrementalMesh(shape, 0.1);
+
+// BRepAlgoAPI_Fuse(S1, S2, ProgressRange=...)
+using fuse = new oc.BRepAlgoAPI_Fuse(s1, s2);
+```
+
+Non-trailing positions still need an argument — if you want to override
+`angDeflection` you must also pass `isRelative`.
+
+## `TopoDS` is the downcast bridge
+
+`oc.TopoDS` is the namespace bridge for casting a `TopoDS_Shape` down to its
+concrete subtype. Each member is a free function that takes a generic shape
+and returns the typed wrapper.
+
+```typescript
+using explorer = new oc.TopExp_Explorer(
+ shape,
+ oc.TopAbs_ShapeEnum.TopAbs_EDGE,
+ oc.TopAbs_ShapeEnum.TopAbs_SHAPE,
+);
+using current = explorer.Current();
+using edge = oc.TopoDS.Edge(current); // typed TopoDS_Edge
+```
+
+The same shape exists for `Face`, `Wire`, `Vertex`, `Shell`, `Solid`,
+`CompSolid`, and `Compound`. Each is a function, not a constructor — no `new`.
+
+## Errors throw `WebAssembly.Exception`
+
+When OCCT raises a C++ exception, it surfaces in JS as a `WebAssembly.Exception`
+carrying the typed C++ tag. Decoding the tag gives you the actual OCCT error
+(e.g. `Standard_DomainError`, `Standard_NullObject`). See the dedicated
+[Debugging WASM exceptions](../guides/debugging-wasm-exceptions) guide for the
+matching pattern; this concepts page intentionally stays out of the
+runtime-decoding weeds.
+
+## Related
+
+- [Return shapes](./return-shapes) — what comes back from a call: native values,
+ in-place class outputs, envelopes, and Handle elision.
+- [Handles and collections](./handles-and-collections) — smart-pointer surfaces
+ (`isNull` / `nullify`) and the `NCollection_*` containers.
+- [Memory and disposables](./memory-and-disposables) — the `using` rule and the
+ `DisposableStack` patterns for ownership transfer.
diff --git a/docs-site/content/docs/package/concepts/handles-and-collections.mdx b/docs-site/content/docs/package/concepts/handles-and-collections.mdx
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@@ -0,0 +1,200 @@
+---
+title: Handles and collections
+description: Smart-pointer surfaces (isNull / nullify) and the NCollection_* container family — what shows up in JS and how to use it.
+---
+
+OCCT carries two long-running C++ idioms that V3's JS surface unifies under
+JS-native shapes: the `Handle` smart pointer family and the `NCollection_*`
+templated container family. This page covers both and the everyday patterns
+they bring to your call sites.
+
+## Smart pointers are unified
+
+In OCCT C++, a `Handle` is an intrusive refcount wrapper around a
+heap-allocated `Geom_Curve`. In the V3 JS bindings, the wrapper and the
+pointee are the same JS object — every `Standard_Transient` subclass _is_ the
+Handle.
+
+```typescript
+using pnt = new oc.gp_Pnt(0, 0, 0);
+using dir = new oc.gp_Dir(0, 0, 1);
+using ax2 = new oc.gp_Ax2(pnt, dir);
+using circle = new oc.Geom_Circle(ax2, 5);
+circle.isNull(); // false
+```
+
+You never reach for a `Handle_` wrapper class — they don't exist on the
+binding object:
+
+```typescript
+oc['Handle_Geom_Curve']; // undefined
+```
+
+You never call `.get()` to unwrap a Handle. Functions that expect a
+`Handle` accept the `Geom_Line` directly:
+
+```typescript
+using line = new oc.Geom_Line(ax1);
+using edge = new oc.BRepBuilderAPI_MakeEdge(line);
+```
+
+## `isNull()` vs `nullify()`
+
+Two methods carry the Handle nullability semantics into JS:
+
+- `isNull()` is a read — `true` if the smart pointer holds no object.
+- `nullify()` clears the smart pointer. **Method calls on a nullified Handle
+ throw.**
+
+```typescript
+using circle = new oc.Geom_Circle(ax2, 5);
+circle.isNull(); // false
+circle.nullify();
+circle.isNull(); // true
+circle.Radius(); // throws — decode via WebAssembly.Exception
+```
+
+The throw surfaces as a `WebAssembly.Exception` carrying the C++ tag; see
+[Debugging WASM exceptions](../guides/debugging-wasm-exceptions).
+
+Plain primitive value types (`gp_Pnt`, `gp_Dir`, `gp_Vec`) do **not** have
+`isNull` / `nullify` — they're not smart pointers, they're directly-owned
+value objects.
+
+## The `NCollection_*` container family
+
+OCCT predates `std::vector`, so it ships its own container family. The
+bindgen auto-discovers `NCollection_*` types referenced by surviving bound
+classes and emits one JS class per template instantiation. The JS class name
+is the mangled C++ name — `NCollection_List` becomes
+`NCollection_List_TopoDS_Shape`, the legacy `TopTools_ListOfShape` typedef
+does **not** appear on the binding object.
+
+Auto-discovery is driven by C++ `using` typedef declarations in the
+generated bindings — not by the JS `using` declaration keyword. These two
+keywords share a name but solve different problems.
+
+### List — `NCollection_List_TopoDS_Shape`
+
+The list family is sequence-ordered, supports head/tail access and reversal,
+and is the workhorse for accumulating shapes during a topological walk.
+
+```typescript
+using box1 = new oc.BRepPrimAPI_MakeBox(10, 10, 10);
+using box2 = new oc.BRepPrimAPI_MakeBox(20, 20, 20);
+using shape1 = box1.Shape();
+using shape2 = box2.Shape();
+
+using list = new oc.NCollection_List_TopoDS_Shape();
+list.Size(); // 0
+
+using appended1 = list.Append(shape1); // see note below
+using appended2 = list.Append(shape2);
+appended1; appended2; // suppress unused-var lint
+
+list.Size(); // 2
+using first = list.First();
+using last = list.Last();
+list.Reverse();
+list.RemoveFirst();
+```
+
+**Critical:** `list.Append(shape)` returns a disposable iterator handle.
+Capture it with `using` — leaving it unbound leaks the handle. The
+`require-using-on-disposable` lint rule catches this automatically.
+
+### Sequence — `NCollection_Sequence_TDF_Label`
+
+Sequence is the same conceptual shape as List but a different OCCT template;
+it shows up most often in XDE / TDocStd workflows. **Its `Append` does not
+return a disposable** — call it as a statement:
+
+```typescript
+using seq = new oc.NCollection_Sequence_TDF_Label();
+using label = new oc.TDF_Label();
+seq.Append(label); // void; no `using`
+seq.Size(); // 1
+```
+
+The general rule across the `NCollection_*` family: `Append` semantics differ
+per template. Trust the `.d.ts` types — they're the source of truth — and
+check the smoke tests when uncertain.
+
+### Indexed map — `NCollection_IndexedMap_TopoDS_Shape_TopTools_ShapeMapHasher`
+
+Indexed maps combine set semantics with insertion-order indexing. The classic
+use is dedup-then-iterate over the faces of a shape:
+
+```typescript
+using box = new oc.BRepPrimAPI_MakeBox(10, 10, 10);
+using shape = box.Shape();
+using explorer = new oc.TopExp_Explorer(
+ shape,
+ oc.TopAbs_ShapeEnum.TopAbs_FACE,
+ oc.TopAbs_ShapeEnum.TopAbs_SHAPE,
+);
+using map = new oc.NCollection_IndexedMap_TopoDS_Shape_TopTools_ShapeMapHasher();
+while (explorer.More()) {
+ using current = explorer.Current();
+ map.Add(current);
+ explorer.Next();
+}
+
+map.Size(); // 6 (cube faces)
+using face1 = map.FindKey(1); // 1-based
+map.Contains(face1); // true
+map.FindIndex(face1); // 1
+```
+
+`FindKey` is **1-based**, matching OCCT's index convention.
+
+### Fixed-size array — `NCollection_Array1_gp_Pnt`
+
+`Array1` is OCCT's fixed-bounds array. The constructor takes lower and upper
+bounds; the array is 1-indexed by default.
+
+```typescript
+using arr = new oc.NCollection_Array1_gp_Pnt(1, 5);
+arr.Length(); // 5
+arr.Lower(); // 1
+arr.Upper(); // 5
+
+const pts = [
+ new oc.gp_Pnt(1, 0, 0),
+ new oc.gp_Pnt(2, 0, 0),
+ new oc.gp_Pnt(3, 0, 0),
+ new oc.gp_Pnt(4, 0, 0),
+ new oc.gp_Pnt(5, 0, 0),
+];
+for (let i = 0; i < pts.length; i++) arr.SetValue(i + 1, pts[i]);
+
+using third = arr.Value(3); // gp_Pnt at index 3
+using first = arr.First();
+using last = arr.Last();
+```
+
+Expect 1-based indexing everywhere in the `NCollection_*` family — `Value(0)`
+throws `Standard_OutOfRange`.
+
+## Lifetimes at a glance
+
+| Holder | Owns the heap allocation? |
+| ------------------------------- | -------------------------------------------------- |
+| Smart-pointer subclass (`Geom_Circle`, `Poly_Triangulation`, …) | Yes — refcounted; copying bumps the count. |
+| Value class (`gp_Pnt`, `gp_Dir`, `gp_Vec`) | Yes — directly owned; dispose to free. |
+| `T&` parameter | No — borrowed for the duration of the call. |
+| `NCollection_*` | Yes — disposing the container disposes its contents.|
+
+In JS terms: every wrapper class — handles, value types, containers — exposes
+`[Symbol.dispose]`. Bind them with `using` so the wasm heap releases at scope
+exit. See [Memory and disposables](./memory-and-disposables) for the full
+ruleset and the `DisposableStack` patterns for ownership transfer.
+
+## Related
+
+- [Memory and disposables](./memory-and-disposables) — when `using` is
+ required, and the `DisposableStack` patterns.
+- [Return shapes](./return-shapes) — `NCollection_*` instances showing up
+ inside envelope fields.
+- [Debugging WASM exceptions](../guides/debugging-wasm-exceptions) — decoding
+ the throw from a nullified-Handle method call.
diff --git a/docs-site/content/docs/package/concepts/memory-and-disposables.mdx b/docs-site/content/docs/package/concepts/memory-and-disposables.mdx
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@@ -0,0 +1,212 @@
+---
+title: Memory and disposables
+description: How OCCT wraps the wasm heap — `using` syntax, Symbol.dispose, leak diagnostics, pool patterns.
+---
+
+Every OCCT object you allocate in JS — `gp_Pnt`, `TopoDS_Shape`,
+`BRepPrimAPI_MakeBox`, every handle, every container — owns memory inside the
+WebAssembly linear memory. Failing to release it leaks the wasm heap, which
+grows up to the 4 GB wasm32 ceiling and then crashes the runtime.
+
+## The `using` rule
+
+Declare every disposable OCCT object with `using` so the runtime invokes
+`[Symbol.dispose]()` when control leaves the scope.
+
+```typescript
+{
+ using box = new oc.BRepPrimAPI_MakeBox(10, 10, 10);
+ using shape = box.Shape(); // also disposable
+ // ... use box / shape ...
+} // ← both disposed here, in reverse declaration order
+```
+
+The OCJS repo includes an oxlint rule, `ocjs-lint/require-using-on-disposable`,
+that flags any plain `const`/`let` declaration of a disposable as an error.
+It's wired into the in-repo `eslint.config.mjs` for the smoke-test suite but
+is **not** auto-installed by `pnpm add opencascade.js` — the published npm
+tarball ships only the wasm, JS loader, `.d.ts`, manifest, provenance, and
+changelogs. If you want the rule in your own project, copy it from the OCJS
+repo into your local lint setup.
+
+## Pure-data containers
+
+Return-by-value (RBV) containers whose fields are all primitives (no nested
+disposables) **do not** auto-emit `[Symbol.dispose]`. You can use them without
+`using`:
+
+```typescript
+// gp_Pnt has only doubles — no dispose
+const point = transform.TransformedPoint(p0);
+console.log(point.X(), point.Y(), point.Z());
+```
+
+Coordinate accessors like `X` / `Y` / `Z` are methods, not properties — see
+[Calling OCCT from JS](./calling-occt-from-js#methods-returning-values-use-)
+for the pattern.
+
+Containers with at least one disposable child auto-emit a `[Symbol.dispose]`
+that walks the children and disposes each. The lint rule above handles the
+classification automatically.
+
+## When `using` is not required
+
+`using` is required for anything that owns wasm memory and surfaces a
+`[Symbol.dispose]`. Four common shapes do **not** need a `using` on the call
+site — see [Return shapes](./return-shapes#when-do-i-need-using) for the full
+decision table.
+
+- **`void` methods with class-only outputs** — `curve.D0(u, pt)` returns
+ `void`; the `using` lives on the input `pt`, not the call result.
+- **Primitive / enum-only envelopes** — `surface.Bounds(0,0,0,0)` returns a
+ plain `{ U1, U2, V1, V2 }` object with no disposer; bind it with `const`.
+- **Native primitive returns** — `pnt.X()`, `list.Size()`, `face.IsNull()`
+ return numbers / booleans, never disposables.
+- **Forwarding ownership out of a helper** — when a function passes ownership
+ to its caller, the helper returns the disposable without `using` so the
+ caller binds it. The `DisposableStack.move()` pattern below is the
+ canonical OCCT idiom.
+
+## Composing lifetimes with `DisposableStack`
+
+The TC39 explicit-resource-management proposal also ships a built-in
+`DisposableStack` — a LIFO container that adopts disposables and disposes
+each one when the stack itself is disposed. Two OCCT-specific patterns
+recur often enough to keep in your toolbox.
+
+### `stack.use(...)` — adopt a multi-handle return value as one resource
+
+Some BRep_Tool overloads return an RBV envelope that owns several embind
+handles (e.g. `PolygonOnTriangulation` in its 2-arg form returns a
+`{ P, T, L }` triple). Binding the whole envelope through `using` is the
+easy path, but if you only want to forward it once and free everything in
+one shot — `stack.use()` adopts the envelope and lets the parent stack
+cascade through its `[Symbol.dispose]`.
+
+```typescript
+using stack = new DisposableStack();
+const r = stack.use(oc.BRep_Tool.PolygonOnTriangulation(edge, loc));
+// ... read r.P / r.T / r.L ...
+// stack disposes here, which disposes r, which disposes P/T/L in turn.
+```
+
+### `stack.move()` — transfer ownership out of a search loop
+
+The hardest OCCT lifetime puzzle is "iterate through a topology looking
+for a match; on hit, hand the owning handles to the caller; on miss, free
+everything before the next iteration". `using` alone can't express this
+because a `using` binding always disposes at scope exit. `DisposableStack`
+solves it: each iteration creates a fresh stack, adopts every interim
+handle, and on success `move()`s the stack into the return value (which
+empties the iteration-scoped stack so its scope-exit dispose is a no-op).
+
+```typescript
+function findFirstTriangulatedEdge(shape: TopoDS_Shape):
+ DisposableStack & { edge: TopoDS_Edge; tri: Poly_Triangulation; loc: TopLoc_Location } {
+ const oc = getOC();
+ using explorer = new oc.TopExp_Explorer(shape, oc.TopAbs_ShapeEnum.TopAbs_EDGE, oc.TopAbs_ShapeEnum.TopAbs_SHAPE);
+
+ while (explorer.More()) {
+ using iterStack = new DisposableStack();
+ using current = explorer.Current();
+ const edge = iterStack.use(oc.TopoDS.Edge(current));
+ const loc = iterStack.use(new oc.TopLoc_Location());
+ // ... walk faces, look up triangulation ...
+ const tri = iterStack.use(oc.BRep_Tool.Triangulation(face, loc, 0));
+ if (!tri.isNull()) {
+ // Match: transfer ownership. `iterStack` is now empty, its scope-exit
+ // dispose is a no-op, and the returned stack owns edge/tri/loc.
+ return Object.assign(iterStack.move(), { edge, tri, loc });
+ }
+ explorer.Next();
+ // No match: `iterStack` disposes here, freeing edge/loc/tri this round.
+ }
+ throw new Error('no triangulated edge');
+}
+
+// Caller side — one `using` collects three handles:
+using ctx = findFirstTriangulatedEdge(shape);
+// The 3-arg PolygonOnTriangulation overload returns a native Handle smart
+// pointer (disposable). For the elision overload that returns the {P, T, L}
+// envelope, see the `stack.use()` example above.
+using polygon = oc.BRep_Tool.PolygonOnTriangulation(ctx.edge, ctx.tri, ctx.loc);
+```
+
+`DisposableStack` is part of the JS standard library wherever
+`[Symbol.dispose]` is — no OCJS-specific runtime is involved. See
+[MDN: DisposableStack](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/DisposableStack)
+for the full surface (`defer`, `adopt`, `disposed`, etc.).
+
+## Pool pattern for hot loops
+
+In a render loop you may allocate the same OCCT object hundreds of times per
+second. Allocate once, reuse, dispose once:
+
+```typescript
+class TransformPool {
+ private readonly transforms = new Map();
+
+ get(key: string): typeof oc.gp_Trsf {
+ let trsf = this.transforms.get(key);
+ if (!trsf) {
+ trsf = new oc.gp_Trsf();
+ this.transforms.set(key, trsf);
+ }
+ return trsf;
+ }
+
+ [Symbol.dispose]() {
+ for (const trsf of this.transforms.values()) trsf[Symbol.dispose]();
+ this.transforms.clear();
+ }
+}
+
+using pool = new TransformPool();
+for (let i = 0; i < 1000; i++) {
+ const trsf = pool.get(`rot-${i % 8}`);
+ trsf.SetRotation(axis, i * 0.01);
+ // ...
+}
+```
+
+## Diagnosing leaks
+
+Wasm heap grows monotonically — to detect a leak, measure
+`oc.HEAP8.byteLength` before and after a representative workload.
+
+```typescript
+const before = oc.HEAP8.byteLength;
+runWorkload();
+const after = oc.HEAP8.byteLength;
+console.log(`heap delta: ${(after - before) / 1024} KB`);
+```
+
+For deep audits, build with `-sASSERTIONS=2 -fsanitize=leak` (debug builds
+only) and the runtime prints a leak summary on `process.exit()`.
+
+## What `[Symbol.dispose]` actually does
+
+Calls the wrapped object's C++ destructor through the embind glue. For
+handles, this decrements the refcount; for value types, it frees the C++
+allocation. The JS wrapper object becomes invalid — subsequent method calls
+throw an embind error (text varies, typically along the lines of
+`BindingError: instance already deleted`).
+
+## Pitfalls
+
+- **`using` inside an `if (cond)` branch** disposes when control exits the
+ branch, not when the outer block ends. Move the declaration up if you need
+ it across the branch.
+- **Returning a `using` value** disposes it before the caller sees it. Use a
+ plain `const` for return values and disposal at the call site.
+- **Passing a disposed object as a parameter** throws on every method.
+ Disciplined `using` placement is the cheapest defence.
+
+## Related
+
+- [Calling OCCT from JS](./calling-occt-from-js) — overload dispatch, enums,
+ defaults, and the `TopoDS` downcast bridge.
+- [Return shapes](./return-shapes) — when a call returns an envelope, a
+ native value, or an in-place class output, and which of those need `using`.
+- [Handles and collections](./handles-and-collections) — `isNull` / `nullify`
+ on smart pointers and the `NCollection_*` container family.
diff --git a/docs-site/content/docs/package/concepts/return-shapes.mdx b/docs-site/content/docs/package/concepts/return-shapes.mdx
new file mode 100644
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@@ -0,0 +1,183 @@
+---
+title: Return shapes
+description: What OCCT methods return in JS — native values, in-place class outputs, primitive envelopes, returnValue, and Handle elision.
+---
+
+A single OCCT method can have multiple output channels: its native C++ return,
+plus any number of `T&` output parameters. The bindings collapse these into a
+small set of JS-shaped return forms. This page covers each shape, how to
+recognise it from a signature, and whether the result needs `using`.
+
+For the rules on _how to call_ a method (overload dispatch, enums, defaults),
+see [Calling OCCT from JS](./calling-occt-from-js).
+
+## TL;DR
+
+| What the C++ method outputs | What JS sees |
+| ---------------------------------------------------------- | ----------------------------------------------------------------------- |
+| Class output param (`Bnd_Box&`, `gp_Pnt&`, …) | The class you passed in is mutated in place. Read it after the call. |
+| Primitive / enum output param (`double&`, `Standard_Real&`) | An envelope is returned; **keep passing placeholder values** at the slot. |
+| Non-const `Handle&` output param | The slot is **elided** from the JS signature; the Handle appears as an envelope field. |
+| Native C++ return alongside any output(s) | Surfaced on the envelope as `returnValue`. |
+
+## Decision tree
+
+Walk this table top-to-bottom for any signature you're reading off the `.d.ts`:
+
+| C++ return | C++ output params | Resulting JS shape |
+| ---------- | ------------------------------------------------------- | --------------------------------------------------------------------------------------------------------------------------- |
+| Non-`void` | None | Native return (no envelope). Smart pointers count as native — see Handles below. |
+| Non-`void` | Class only (mutated in place) | Native return. Read mutated classes from your input variables; they are not echoed in the return. |
+| `void` | Class only | `void`. Read mutated classes from your input variables. |
+| Non-`void` | Primitives / enums / elided Handles (± class outputs) | Envelope with `returnValue` for the C++ return + one named field per non-class, non-elided output. Class outputs are NOT echoed. |
+| `void` | Primitives / enums / elided Handles (± class outputs) | Same envelope shape, minus `returnValue`. |
+
+The four sections below walk each row with worked examples.
+
+## Class outputs mutate in place
+
+When a method takes a non-const class reference (`gp_Pnt&`, `Bnd_Box&`,
+`GProp_GProps&`, `TopoDS_Shape&`), the binding passes the JS wrapper's
+underlying C++ pointer straight through. The C++ method mutates the object you
+allocated; you read the result by querying your own variable after the call.
+
+```typescript
+using curve = makeSomeCurve();
+using inStartPt = new oc.gp_Pnt2d(0, 0);
+using inEndPt = new oc.gp_Pnt2d(0, 0);
+
+curve.D0(curve.FirstParameter(), inStartPt);
+curve.D0(curve.LastParameter(), inEndPt);
+
+console.log(inStartPt.X(), inStartPt.Y()); // mutated by D0
+console.log(inEndPt.X(), inEndPt.Y());
+```
+
+Same pattern for whole-shape evaluators:
+
+```typescript
+using props = new oc.GProp_GProps();
+oc.BRepGProp.VolumeProperties(shape, props, false, false, false);
+const volume = props.Mass();
+```
+
+The call itself returns `void` or a native value — never an envelope echoing
+the class output. The `using` declaration that matters is the one on your
+input class; the call site doesn't need its own `using`.
+
+## Primitive / enum envelopes — placeholder inputs are required
+
+When the method has primitive or enum output parameters, the binding wraps the
+return in an envelope object whose fields mirror those outputs. The C++
+signature is preserved at the call site — you keep passing values for those
+slots, but the values are placeholders that C++ overwrites.
+
+```typescript
+using surface = new oc.Geom_SphericalSurface(ax, 10);
+const bounds = surface.Bounds(0, 0, 0, 0); // placeholders
+console.log(bounds.U1, bounds.U2, bounds.V1, bounds.V2);
+```
+
+The four `0`s are **not optional**. The binding uses input-passthrough
+return-by-value: it preserves the C++ argument list so overload resolution
+still works, then reads back the mutated values into the envelope. Calling
+`surface.Bounds()` with zero arguments either fails dispatch or picks the
+wrong overload.
+
+Primitive-only envelopes (every field is a number, boolean, or string) **do
+not carry `[Symbol.dispose]`**. Plain `const` works; you don't need `using` on
+the result. This is enforced by the type-level contract in
+`tests/disposable-containers.test-d.ts` — the type tests are the canonical
+truth even where the `BREAKING_CHANGES.md` §B2 table row still shows a
+disposer on the `Bounds` shape.
+
+## `returnValue`, not `result`
+
+When a method has a non-`void` C++ return _and_ primitive/enum/Handle
+outputs, the envelope grows a `returnValue` field carrying the native return.
+The OCJS v2 name `result` is gone in V3.
+
+```typescript
+using batten = new oc.FairCurve_Batten(p1, p2, /* height */ 0.5);
+const r = batten.Compute(
+ oc.FairCurve_AnalysisCode.FairCurve_OK, // input-passthrough enum
+ /* nbIters */ 50,
+ /* tolerance */ 1e-3,
+);
+console.log(r.returnValue); // boolean, the C++ return
+console.log(r.Code); // enum output mirror
+```
+
+`BRep_Tool.Curve` is another common case: the primitive-only outputs (`First`,
+`Last`) and the native Handle return appear together on a `{ returnValue,
+First, Last }` envelope.
+
+## Handle output elision
+
+Non-const `Handle&` output parameters are the one case where the JS
+signature is _smaller_ than the C++ signature. The binding drops those
+positions from the JS argument list entirely; the freshly-assigned Handle
+surfaces as an envelope field instead.
+
+```typescript
+using r = oc.BRep_Tool.PolygonOnTriangulation(edge, loc); // 2 args, not 4
+console.log(r.P, r.T); // Handle outputs
+// `loc` (a class output) is mutated in place; not echoed in r.
+```
+
+Compare to the same method called with a triangulation in its overload slot —
+note that this is a **different overload**, picked by argument shape, that
+returns a native Handle instead of an envelope:
+
+```typescript
+using handle = oc.BRep_Tool.PolygonOnTriangulation(edge, tri, loc); // 3 args
+// handle is a Handle, not an envelope.
+```
+
+This is the asymmetry to internalise:
+
+- Primitive / enum output slots → **stay** in the JS arg list as placeholders.
+- `Handle&` output slots → **disappear** from the JS arg list.
+
+Other elided signatures: `GeomInt_IntSS.BuildPCurves`,
+`ShapeAnalysis_Edge.TreatRLine`, the `ShapeConstruct.New*` family,
+`HelixGeom_BuilderApproxCurve3d.ApprHelix`.
+
+Handle-bearing envelopes do carry `[Symbol.dispose]` — they own embind
+wrappers that must be released. Always bind them with `using`.
+
+## When do I need `using`?
+
+| Return shape | `using` on the call site? |
+| ----------------------------------------------------------------------- | ------------------------- |
+| `void` with class-only outputs (e.g. `curve.D0(u, pt)`) | No — `using` goes on the input class. |
+| Native primitive return (`pnt.X()`, `list.Size()`) | No — plain values. |
+| Native Handle return (`arcMaker.Value() → Geom_TrimmedCurve`) | Yes — Handle is disposable. |
+| Primitive / enum-only envelope (`surface.Bounds(0,0,0,0)`) | No — envelope has no disposer. |
+| Handle-bearing envelope (`BRep_Tool.PolygonOnTriangulation(edge, loc)`) | Yes — `[Symbol.dispose]` cascades through the Handle fields. |
+
+The canonical type-level contract lives in
+`tests/disposable-containers.test-d.ts` and `tests/output-params.test-d.ts`
+in the OCJS repo — when in doubt, the type definitions are the source of
+truth.
+
+## Disposer idempotency
+
+Manual `r[Symbol.dispose]()` followed by a `using` scope-exit re-dispose is
+safe — the second call is a no-op rather than a `BindingError`. This is
+intentional so try/finally migration paths can co-exist with `using`:
+
+```typescript
+using r = oc.BRep_Tool.PolygonOnTriangulation(edge, loc);
+r[Symbol.dispose](); // no-op for the scope-exit dispose
+```
+
+## Related
+
+- [Calling OCCT from JS](./calling-occt-from-js) — overload dispatch,
+ defaults, enums, and the `TopoDS` downcast bridge.
+- [Handles and collections](./handles-and-collections) — the smart-pointer
+ surface (`isNull` / `nullify`) and the `NCollection_*` containers that show
+ up in envelope fields.
+- [Memory and disposables](./memory-and-disposables) — when `using` is
+ required vs. optional, and the `DisposableStack` patterns.
diff --git a/docs-site/content/docs/package/examples/boolean-logo.mdx b/docs-site/content/docs/package/examples/boolean-logo.mdx
new file mode 100644
index 00000000..2928e5d9
--- /dev/null
+++ b/docs-site/content/docs/package/examples/boolean-logo.mdx
@@ -0,0 +1,102 @@
+---
+title: Boolean logo
+description: Build the OCJS logo with boolean cuts and rotations against a sphere.
+---
+
+A worked example of boolean operations — start with a sphere, cut it four
+times with translated and scaled copies, fuse a rotated duplicate, and
+visualise the result.
+
+```typescript title="examples/boolean-logo.ts"
+import type { TopoDS_Shape } from '@taucad/opencascade.js';
+import { getOc } from './ocjs-init';
+
+export const buildLogo = async (): Promise => {
+ const oc = await getOc();
+ using sphere = new oc.BRepPrimAPI_MakeSphere(1);
+
+ const makeCut = (shape: TopoDS_Shape, translation: readonly [number, number, number], scale: number) => {
+ using tf = new oc.gp_Trsf();
+ tf.SetTranslation(new oc.gp_Vec(translation[0], translation[1], translation[2]));
+ tf.SetScaleFactor(scale);
+ using loc = new oc.TopLoc_Location(tf);
+ using progress = new oc.Message_ProgressRange();
+ using cut = new oc.BRepAlgoAPI_Cut(shape, sphere.Shape().Moved(loc, false), progress);
+ cut.Build(progress);
+ return cut.Shape();
+ };
+
+ const cut1 = makeCut(sphere.Shape(), [0, 0, 0.7], 1);
+ const cut2 = makeCut(cut1, [0, 0, -0.7], 1);
+ const cut3 = makeCut(cut2, [0, 0.25, 1.75], 1.825);
+ const cut4 = makeCut(cut3, [4.8, 0, 0], 5);
+
+ const makeRotation = (rotation: number) => {
+ const tf = new oc.gp_Trsf();
+ tf.SetRotation(new oc.gp_Ax1(new oc.gp_Pnt(), new oc.gp_Dir(0, 0, 1)), rotation);
+ return new oc.TopLoc_Location(tf);
+ };
+
+ using progress = new oc.Message_ProgressRange();
+ using fuse = new oc.BRepAlgoAPI_Fuse(cut4, cut4.Moved(makeRotation(Math.PI), false), progress);
+ fuse.Build(progress);
+ const result = fuse.Shape().Moved(makeRotation(-30 * Math.PI / 180), false);
+
+ // XCAF — per-subset PBR materials (brass + gray zones)
+ using doc = new oc.TDocStd_Document(new oc.TCollection_ExtendedString_1());
+ const shapeTool = oc.XCAFDoc_DocumentTool.ShapeTool(doc.Main()).get();
+
+ using it1 = new oc.TopoDS_Iterator(result, true, true);
+ for (; it1.More(); it1.Next()) {
+ let i = 0;
+ using it2 = new oc.TopoDS_Iterator(it1.Value(), true, true);
+ for (; it2.More(); it2.Next()) {
+ const newShape = shapeTool.NewShape();
+ shapeTool.SetShape(newShape, it2.Value());
+
+ const vmtool = oc.XCAFDoc_DocumentTool.VisMaterialTool(newShape).get();
+ using visMat = new oc.XCAFDoc_VisMaterial();
+ const matLabel = vmtool.AddMaterial(
+ new oc.Handle_XCAFDoc_VisMaterial(visMat),
+ new oc.TCollection_AsciiString(`logoMat${i}`),
+ );
+ vmtool.SetShapeMaterial(newShape, matLabel);
+
+ using visMatPbr = new oc.XCAFDoc_VisMaterialPBR();
+ if (i === 3) {
+ visMatPbr.BaseColor = new oc.Quantity_ColorRGBA(0.6, 0.5, 0, 1);
+ } else {
+ visMatPbr.BaseColor = new oc.Quantity_ColorRGBA(0.3, 0.3, 0.3, 1);
+ }
+ visMat.SetPbrMaterial(visMatPbr);
+ i++;
+ }
+ }
+
+ return result;
+};
+```
+
+## What's happening
+
+1. `BRepPrimAPI_MakeSphere(1)` builds a unit sphere.
+2. `makeCut` constructs a transform (translate + scale), wraps it in a
+ `TopLoc_Location`, moves a copy of the sphere, and subtracts it via
+ `BRepAlgoAPI_Cut`.
+3. Four sequential cuts produce one half of the OCJS logo glyph.
+4. `BRepAlgoAPI_Fuse` welds the half to a 180°-rotated copy of itself.
+5. A final 30° rotation tilts the logo.
+
+The takeaway: boolean operations allow you to create highly complex shapes
+that would be difficult or impossible with classical polygon-based modelling.
+
+## Render it
+
+```typescript
+const logoShape = await buildLogo();
+const glb = await shapeToGlb(logoShape);
+renderGlb(canvas, glb);
+```
+
+See [Render with three.js](../guides/render-with-three-js) for the GLB → three.js wiring.
+See also [Visualize shape helper](../guides/visualize-shape-helper).
diff --git a/docs-site/content/docs/package/examples/classic-bottle.mdx b/docs-site/content/docs/package/examples/classic-bottle.mdx
new file mode 100644
index 00000000..db1e5132
--- /dev/null
+++ b/docs-site/content/docs/package/examples/classic-bottle.mdx
@@ -0,0 +1,202 @@
+---
+title: Classic bottle
+description: The canonical OCCT tutorial — bottle profile, fillets, neck, threading — translated to V3 TypeScript.
+---
+
+The [OpenCASCADE bottle tutorial](https://dev.opencascade.org/doc/overview/html/occt__tutorial.html)
+ported to V3 TypeScript with `using` syntax and suffix-free API.
+
+The example demonstrates **every major OCCT capability** in one script: 2D
+profile construction, mirroring, extrusion, fillets, cylinder primitives,
+boolean fuse, hollow-solid generation, threading via `ThruSections`, and
+final compound assembly.
+
+```typescript title="examples/classic-bottle.ts"
+import type { TopoDS_Shape } from '@taucad/opencascade.js';
+import { getOc } from './ocjs-init';
+
+export type BottleParams = {
+ width: number; // 20–100, default 50
+ height: number; // 50–120, default 70
+ thickness: number; // 15–50, default 30
+};
+
+export const buildBottle = async (
+ { width, height, thickness }: BottleParams = { width: 50, height: 70, thickness: 30 },
+): Promise => {
+ const oc = await getOc();
+
+ // Profile — define support points
+ const aPnt1 = new oc.gp_Pnt(-width / 2, 0, 0);
+ const aPnt2 = new oc.gp_Pnt(-width / 2, -thickness / 4, 0);
+ const aPnt3 = new oc.gp_Pnt(0, -thickness / 2, 0);
+ const aPnt4 = new oc.gp_Pnt(width / 2, -thickness / 4, 0);
+ const aPnt5 = new oc.gp_Pnt(width / 2, 0, 0);
+
+ // Profile — define the geometry
+ using arc = new oc.GC_MakeArcOfCircle(aPnt2, aPnt3, aPnt4);
+ using seg1 = new oc.GC_MakeSegment(aPnt1, aPnt2);
+ using seg2 = new oc.GC_MakeSegment(aPnt4, aPnt5);
+
+ // Profile — define the topology
+ using edge1 = new oc.BRepBuilderAPI_MakeEdge(seg1.Value());
+ using edge2 = new oc.BRepBuilderAPI_MakeEdge(arc.Value());
+ using edge3 = new oc.BRepBuilderAPI_MakeEdge(seg2.Value());
+ using wire = new oc.BRepBuilderAPI_MakeWire(edge1.Edge(), edge2.Edge(), edge3.Edge());
+
+ // Mirror the wire across the X axis
+ const xAxis = oc.gp.OX();
+ using trsf = new oc.gp_Trsf();
+ trsf.SetMirror(xAxis);
+ using mirroredBuilder = new oc.BRepBuilderAPI_Transform(wire.Wire(), trsf, false);
+ const mirroredShape = mirroredBuilder.Shape();
+
+ using fullProfile = new oc.BRepBuilderAPI_MakeWire();
+ fullProfile.Add(wire.Wire());
+ fullProfile.Add(oc.TopoDS.Wire(mirroredShape));
+
+ // Body — extrude the profile
+ using faceProfile = new oc.BRepBuilderAPI_MakeFace(fullProfile.Wire(), false);
+ using prismVec = new oc.gp_Vec(0, 0, height);
+ using body = new oc.BRepPrimAPI_MakePrism(faceProfile.Face(), prismVec, false, true);
+ let workingBody = body.Shape();
+
+ // Body — apply edge fillets
+ using fillet = new oc.BRepFilletAPI_MakeFillet(workingBody, oc.ChFi3d_FilletShape.ChFi3d_Rational);
+ using edgeExp = new oc.TopExp_Explorer(workingBody, oc.TopAbs_ShapeEnum.TopAbs_EDGE);
+ while (edgeExp.More()) {
+ fillet.Add(thickness / 12, oc.TopoDS.Edge(edgeExp.Current()));
+ edgeExp.Next();
+ }
+ workingBody = fillet.Shape();
+
+ // Body — add the neck
+ using neckLocation = new oc.gp_Pnt(0, 0, height);
+ const neckAxis = oc.gp.DZ();
+ using neckAx2 = new oc.gp_Ax2(neckLocation, neckAxis);
+ const neckRadius = 5;
+ const neckHeight = 5;
+ using cyl = new oc.BRepPrimAPI_MakeCylinder(neckAx2, neckRadius, neckHeight);
+ using progress = new oc.Message_ProgressRange();
+ using fuse = new oc.BRepAlgoAPI_Fuse(workingBody, cyl.Shape(), progress);
+ workingBody = fuse.Shape();
+
+ // Body — hollow the solid (remove the top face of the neck)
+ let faceToRemove: ReturnType | undefined;
+ let zMax = -1;
+ using faceExp = new oc.TopExp_Explorer(workingBody, oc.TopAbs_ShapeEnum.TopAbs_FACE);
+ for (; faceExp.More(); faceExp.Next()) {
+ const aFace = oc.TopoDS.Face(faceExp.Current());
+ const aSurface = oc.BRep_Tool.Surface(aFace);
+ if (aSurface.get().$$.ptrType.name === 'Geom_Plane*') {
+ const aPlane = new oc.Handle_Geom_Plane(aSurface.get()).get();
+ const aPnt = aPlane.Location();
+ if (aPnt.Z() > zMax) {
+ zMax = aPnt.Z();
+ using topFaceExp = new oc.TopExp_Explorer(aFace, oc.TopAbs_ShapeEnum.TopAbs_FACE);
+ faceToRemove = oc.TopoDS.Face(topFaceExp.Current());
+ }
+ }
+ }
+
+ using facesToRemove = new oc.TopTools_ListOfShape();
+ if (faceToRemove) facesToRemove.Append(faceToRemove);
+ using thickSolid = new oc.BRepOffsetAPI_MakeThickSolid();
+ thickSolid.MakeThickSolidByJoin(
+ workingBody,
+ facesToRemove,
+ -thickness / 50,
+ 1e-3,
+ oc.BRepOffset_Mode.BRepOffset_Skin,
+ false,
+ false,
+ oc.GeomAbs_JoinType.GeomAbs_Arc,
+ false,
+ progress,
+ );
+ workingBody = thickSolid.Shape();
+
+ // Threading — cylindrical surfaces + elliptical 2D curves
+ using aCyl1 = new oc.Geom_CylindricalSurface(new oc.gp_Ax3(neckAx2), neckRadius * 0.99);
+ using aCyl2 = new oc.Geom_CylindricalSurface(new oc.gp_Ax3(neckAx2), neckRadius * 1.05);
+
+ const aPnt2d = new oc.gp_Pnt2d(2 * Math.PI, neckHeight / 2);
+ const aDir2d = new oc.gp_Dir2d(2 * Math.PI, neckHeight / 4);
+ using anAx2d = new oc.gp_Ax2d(aPnt2d, aDir2d);
+
+ const aMajor = 2 * Math.PI;
+ const aMinor = neckHeight / 10;
+
+ using anEllipse1 = new oc.Geom2d_Ellipse(anAx2d, aMajor, aMinor, true);
+ using anEllipse2 = new oc.Geom2d_Ellipse(anAx2d, aMajor, aMinor / 4, true);
+ using anArc1 = new oc.Geom2d_TrimmedCurve(new oc.Handle_Geom2d_Curve(anEllipse1), 0, Math.PI, true, true);
+ using anArc2 = new oc.Geom2d_TrimmedCurve(new oc.Handle_Geom2d_Curve(anEllipse2), 0, Math.PI, true, true);
+
+ const tmp1 = anEllipse1.Value(0);
+ const anEllipsePnt1 = new oc.gp_Pnt2d(tmp1.X(), tmp1.Y());
+ const tmp2 = anEllipse1.Value(Math.PI);
+ const anEllipsePnt2 = new oc.gp_Pnt2d(tmp2.X(), tmp2.Y());
+ using aSegment = new oc.GCE2d_MakeSegment(anEllipsePnt1, anEllipsePnt2);
+
+ using anEdge1OnSurf1 = new oc.BRepBuilderAPI_MakeEdge(
+ new oc.Handle_Geom2d_Curve(anArc1),
+ new oc.Handle_Geom_Surface(aCyl1),
+ );
+ using anEdge2OnSurf1 = new oc.BRepBuilderAPI_MakeEdge(
+ new oc.Handle_Geom2d_Curve(aSegment.Value()),
+ new oc.Handle_Geom_Surface(aCyl1),
+ );
+ using anEdge1OnSurf2 = new oc.BRepBuilderAPI_MakeEdge(
+ new oc.Handle_Geom2d_Curve(anArc2),
+ new oc.Handle_Geom_Surface(aCyl2),
+ );
+ using anEdge2OnSurf2 = new oc.BRepBuilderAPI_MakeEdge(
+ new oc.Handle_Geom2d_Curve(aSegment.Value()),
+ new oc.Handle_Geom_Surface(aCyl2),
+ );
+ using threadingWire1 = new oc.BRepBuilderAPI_MakeWire(
+ anEdge1OnSurf1.Edge(),
+ anEdge2OnSurf1.Edge(),
+ );
+ using threadingWire2 = new oc.BRepBuilderAPI_MakeWire(
+ anEdge1OnSurf2.Edge(),
+ anEdge2OnSurf2.Edge(),
+ );
+ oc.BRepLib.BuildCurves3d(threadingWire1.Wire());
+ oc.BRepLib.BuildCurves3d(threadingWire2.Wire());
+
+ using aTool = new oc.BRepOffsetAPI_ThruSections(true, false, 1e-6);
+ aTool.AddWire(threadingWire1.Wire());
+ aTool.AddWire(threadingWire2.Wire());
+ aTool.CheckCompatibility(false);
+ const myThreading = aTool.Shape();
+
+ // Compound assembly + final rotation
+ using aRes = new oc.TopoDS_Compound();
+ using aBuilder = new oc.BRep_Builder();
+ aBuilder.MakeCompound(aRes);
+ aBuilder.Add(aRes, workingBody);
+ aBuilder.Add(aRes, myThreading);
+
+ using rotTrsf = new oc.gp_Trsf();
+ rotTrsf.SetRotation(new oc.gp_Ax1(new oc.gp_Pnt(), new oc.gp_Dir(1, 0, 0)), -Math.PI / 2);
+ using rotLoc = new oc.TopLoc_Location(rotTrsf);
+ return aRes.Moved(rotLoc, false);
+};
+```
+
+Every OCCT API used above has a direct V3 binding under `oc.` with no
+`_N` suffix. See the [OpenCASCADE tutorial](https://dev.opencascade.org/doc/overview/html/occt__tutorial.html)
+for the step-by-step walkthrough of the underlying geometry.
+
+## Migration from v2
+
+The v2 example used `gp_Pnt_3`, `GC_MakeArcOfCircle_4`, `BRepBuilderAPI_MakeEdge_24`,
+`gp_Trsf_1`, etc. V3 drops every `_N` suffix — overload dispatch happens in
+C++ via the unified RBV pipeline. Pass arguments by type and the right overload
+runs automatically.
+
+## Render
+
+See [Render with three.js](../guides/render-with-three-js) for the GLB → three.js wiring.
+See also [Visualize shape helper](../guides/visualize-shape-helper).
diff --git a/docs-site/content/docs/package/examples/polygon-extrusion.mdx b/docs-site/content/docs/package/examples/polygon-extrusion.mdx
new file mode 100644
index 00000000..65c10d25
--- /dev/null
+++ b/docs-site/content/docs/package/examples/polygon-extrusion.mdx
@@ -0,0 +1,49 @@
+---
+title: Polygon extrusion
+description: Build a polygonal wire, face it, and extrude into a prism — three OCCT calls.
+---
+
+The minimum useful OCCT example: a four-point polygon extruded along Z.
+
+```typescript title="examples/polygon-extrusion.ts"
+import type { TopoDS_Shape } from '@taucad/opencascade.js';
+import { getOc } from './ocjs-init';
+
+export const buildExtrudedPolygon = async (): Promise => {
+ const oc = await getOc();
+
+ using polygon = new oc.BRepBuilderAPI_MakePolygon();
+ polygon.Add(new oc.gp_Pnt(-50, -50, 0));
+ polygon.Add(new oc.gp_Pnt(50, -50, 0));
+ polygon.Add(new oc.gp_Pnt(50, 50, 0));
+ polygon.Add(new oc.gp_Pnt(-50, 50, 0));
+ polygon.Close();
+
+ using face = new oc.BRepBuilderAPI_MakeFace(polygon.Wire(), false);
+ using prismVec = new oc.gp_Vec(0, 0, 40);
+ using prism = new oc.BRepPrimAPI_MakePrism(face.Face(), prismVec, false, true);
+ return prism.Shape();
+};
+```
+
+## Why this matters
+
+- `BRepBuilderAPI_MakePolygon` accepts an arbitrary number of points — three
+ for a triangle, hundreds for a complex contour.
+- `Close()` adds the implicit closing edge.
+- `BRepBuilderAPI_MakeFace(wire, false)` faces the wire; `false` means "this
+ is the only wire of the face" (set `true` if you're adding holes later).
+- `BRepPrimAPI_MakePrism` extrudes along an arbitrary direction vector, not
+ just Z.
+
+Swap `gp_Vec(0, 0, 40)` for `gp_Vec(0.5, 0.5, 1)` and you get a slanted
+prism. Swap the polygon for a `BRepBuilderAPI_MakeWire` with curved edges
+and you get an extruded curved profile.
+
+## Next steps
+
+- Combine multiple extrusions with `BRepAlgoAPI_Fuse` for additive construction.
+- Subtract holes with `BRepAlgoAPI_Cut`.
+- Fillet sharp edges with `BRepFilletAPI_MakeFillet`.
+
+See [First shape tutorial](../getting-started/first-shape-tutorial) for the fillet pattern.
diff --git a/docs-site/content/docs/package/getting-started/faq.mdx b/docs-site/content/docs/package/getting-started/faq.mdx
new file mode 100644
index 00000000..e16247ef
--- /dev/null
+++ b/docs-site/content/docs/package/getting-started/faq.mdx
@@ -0,0 +1,39 @@
+---
+title: FAQ
+description: Fork status, maintenance model, and how to contribute to OpenCascade.js during the V3 / OCCT V8 release window.
+---
+
+## Is this a fork of OpenCascade?
+
+Yes — with nuance. `@taucad/opencascade.js` is a **Tau-maintained fork** of
+[`donalffons/opencascade.js`](https://github.com/donalffons/opencascade.js),
+which itself is a port of upstream [OpenCASCADE Technology (OCCT)](https://dev.opencascade.org/)
+to WebAssembly via Emscripten.
+
+The fork exists to ship the **V3 / OCCT V8 release** while upstream is dormant.
+The intent is to **merge back upstream** into `donalffons/opencascade.js` via a
+single PR once V8 lands. During this window, issues and releases live at
+[`taucad/opencascade.js`](https://github.com/taucad/opencascade.js).
+
+OpenCascade.js does **not** modify the OCCT C++ source beyond a small set of
+patches applied at build time. The pipeline downloads a tagged OCCT commit,
+compiles with Emscripten, auto-generates embind bindings from libclang, and
+ships the wasm + TypeScript surface as an npm package.
+
+## Who maintains it?
+
+**`donalffons`** remains the maintainer-of-record for OpenCascade.js.
+**Tau** is the interim driver during the V3 / OCCT V8 release window — shipping
+docs, the GHCR Docker image, and the `@taucad/opencascade.js@beta` npm package
+until the merge-back PR lands.
+
+## How can I contribute?
+
+Contributions are welcome and upstream-merge-back-aware:
+
+1. Open issues or PRs at [`taucad/opencascade.js`](https://github.com/taucad/opencascade.js).
+2. Follow the existing code style and test conventions in the repo.
+3. Prefer changes that will survive the upstream merge-back (OCJS-original
+ branding, suffix-free V3 API, no Tau-specific forks of core bindgen logic).
+
+For larger architectural questions, start a discussion before opening a PR.
diff --git a/docs-site/content/docs/package/getting-started/first-shape-tutorial.mdx b/docs-site/content/docs/package/getting-started/first-shape-tutorial.mdx
new file mode 100644
index 00000000..52bb8252
--- /dev/null
+++ b/docs-site/content/docs/package/getting-started/first-shape-tutorial.mdx
@@ -0,0 +1,88 @@
+---
+title: First Shape Tutorial
+description: Build a filleted box from scratch, render it in three.js, and inspect the OCCT call sites.
+---
+
+This tutorial extends the npm quickstart with explanations of every OCCT type
+involved — useful if you've never touched OCCT before.
+
+## Step 1 — Choose a primitive
+
+`BRepPrimAPI_MakeBox` constructs an axis-aligned box from three lengths.
+
+```typescript
+using box = new oc.BRepPrimAPI_MakeBox(60, 40, 20);
+const shape = box.Shape();
+```
+
+`shape` is a `TopoDS_Shape` — the universal OCCT geometry handle. All booleans,
+fillets, and exports take and return `TopoDS_Shape` instances.
+
+## Step 2 — Walk topology
+
+OCCT shapes are hierarchical: `SOLID → SHELL → FACE → WIRE → EDGE → VERTEX`.
+`TopExp_Explorer` iterates entries of a given kind in declaration order.
+
+```typescript
+using explorer = new oc.TopExp_Explorer(shape, oc.TopAbs_ShapeEnum.TopAbs_EDGE);
+const edges: typeof oc.TopoDS_Edge[] = [];
+while (explorer.More()) {
+ edges.push(oc.TopoDS.Edge(explorer.Current()));
+ explorer.Next();
+}
+```
+
+A box has 12 edges — three groups of 4 parallel edges along each axis.
+
+## Step 3 — Apply a fillet
+
+`BRepFilletAPI_MakeFillet` takes the shape and a per-edge radius. Calling
+`Add(radius, edge)` once per edge marks them for filleting; `Shape()` runs the
+algorithm and returns the result.
+
+```typescript
+using fillet = new oc.BRepFilletAPI_MakeFillet(shape);
+for (const edge of edges) fillet.Add(3, edge);
+const filletedShape = fillet.Shape();
+```
+
+## Step 4 — Tessellate and export
+
+Until you call `BRepMesh_IncrementalMesh`, the shape has no triangulation —
+it's still analytic. The mesher caches per-shape triangulation; pass
+`decreate=true` on the third argument to force regeneration when you change
+tolerance.
+
+```typescript
+using _mesh = new oc.BRepMesh_IncrementalMesh(filletedShape, 0.1, false, 0.5, false);
+```
+
+The two tolerances are **linear** (mm) and **angular** (radians). 0.1 mm linear
+is fine for a 60 mm box; tighten it on small features.
+
+Export via the XCAF path documented in [Export glTF / GLB](../guides/export-gltf)
+to get a GLB your three.js viewer can load.
+
+## Step 5 — Render
+
+The npm quickstart shows the full three.js wiring. The minimal version:
+
+```typescript
+const loader = new GLTFLoader();
+loader.parse(glb.buffer, '', (gltf) => scene.add(gltf.scene));
+```
+
+## What went wrong if…
+
+| Symptom | Likely cause |
+|---|---|
+| `BindingError: ptr<-1>` | You called a method on a disposed object — `using` exited scope earlier than expected |
+| Black canvas, no errors | Camera is inside the shape — set `camera.position.set(100, 100, 100)` |
+| Fillet `Shape()` throws | One of your edges is degenerate; check `edge.Orientation()` |
+| `RWGltf_CafWriter.Perform` returns false | The XCAF doc has no shape attached — verify `ShapeTool.AddShape` succeeded |
+
+## Where to next
+
+- [Memory and disposables](../concepts/memory-and-disposables) for the OCCT memory model in depth.
+- [Two-channel config model](../concepts/two-channel-config-model) for compile-time vs link-time config.
+- [BRepPrimAPI](/docs/package/api/modeling-algorithms/tk-prim/b-rep-prim-api) for the primitive surface.
diff --git a/docs-site/content/docs/package/getting-started/projects-using-opencascade-js.mdx b/docs-site/content/docs/package/getting-started/projects-using-opencascade-js.mdx
new file mode 100644
index 00000000..6b66803f
--- /dev/null
+++ b/docs-site/content/docs/package/getting-started/projects-using-opencascade-js.mdx
@@ -0,0 +1,22 @@
+---
+title: Projects using OpenCascade.js
+description: Public projects and reference repositories built on OpenCascade.js.
+---
+
+OpenCascade.js powers browser-native CAD across several production apps and
+reference repositories. Tau is listed as a peer entry alongside the original
+gallery — not promoted to headline status.
+
+## Applications
+
+- [ArchiYou](https://archiyou.com/) — library, code-CAD design tool, community hub.
+- [BitByBit](https://bitbybit.dev/) — code- and node-based CAD design tool.
+- [CascadeStudio](https://github.com/zalo/CascadeStudio) — library and code-CAD design tool.
+- [Polygonjs](https://polygonjs.com) — procedural design and animation tool for WebGL.
+- [RepliCAD](https://replicad.xyz/) — library and code-CAD design tool.
+- [Tau](https://tau.new) — AI-native CAD platform for the web.
+
+## Reference repositories
+
+- [opencascade.js-examples](https://github.com/donalffons/opencascade.js-examples) —
+ general examples on how to use the library.
diff --git a/docs-site/content/docs/package/getting-started/quick-start-npm.mdx b/docs-site/content/docs/package/getting-started/quick-start-npm.mdx
new file mode 100644
index 00000000..d3052dc6
--- /dev/null
+++ b/docs-site/content/docs/package/getting-started/quick-start-npm.mdx
@@ -0,0 +1,118 @@
+---
+title: Quickstart — npm
+description: Install @taucad/opencascade.js, render a 60×40×20 box with a 3 mm fillet, and export GLB.
+---
+
+Target time: **4 minutes** from an empty directory to an orbit-controlled box
+in your browser.
+
+## Prerequisites
+
+- Node 22+ and pnpm 9+ (npm and yarn also work).
+- A bundler that supports wasm imports — Vite 6+, Next 15+, or Bun.
+
+## 1. Install
+
+```bash
+pnpm add @taucad/opencascade.js@beta three
+pnpm add -D @types/three typescript
+```
+
+## 2. Initialise OCCT once
+
+```typescript title="src/ocjs-init.ts"
+import init from '@taucad/opencascade.js';
+import wasmUrl from '@taucad/opencascade.js/wasm?url';
+
+let ocPromise: ReturnType | undefined;
+export const getOc = () => (ocPromise ??= init({ locateFile: () => wasmUrl }));
+```
+
+The memoised Promise guarantees one wasm fetch and one C++ runtime init per page
+load. Re-calling `getOc()` from anywhere in your app resolves immediately after
+the first warm-up.
+
+## 3. Build a shape
+
+```typescript title="src/build-shape.ts"
+import { getOc } from './ocjs-init';
+
+export const buildFilletedBox = async () => {
+ const oc = await getOc();
+ using box = new oc.BRepPrimAPI_MakeBox(60, 40, 20);
+ using fillet = new oc.BRepFilletAPI_MakeFillet(box.Shape());
+ using explorer = new oc.TopExp_Explorer(box.Shape(), oc.TopAbs_ShapeEnum.TopAbs_EDGE);
+ while (explorer.More()) {
+ fillet.Add(3, oc.TopoDS.Edge(explorer.Current()));
+ explorer.Next();
+ }
+ return fillet.Shape();
+};
+```
+
+Every OCCT object is disposable — `using` invokes `Symbol.dispose()` at scope
+exit so the C++ heap doesn't leak.
+
+## 4. Export to GLB
+
+```typescript title="src/shape-to-glb.ts"
+import type { TopoDS_Shape } from '@taucad/opencascade.js';
+import { getOc } from './ocjs-init';
+
+export const shapeToGlb = async (shape: TopoDS_Shape): Promise => {
+ const oc = await getOc();
+ using docName = new oc.TCollection_ExtendedString('doc', true);
+ const doc = new oc.TDocStd_Document(docName);
+ oc.XCAFDoc_DocumentTool.ShapeTool(doc.Main()).get().AddShape(shape, false, false);
+ using _mesh = new oc.BRepMesh_IncrementalMesh(shape, 0.1, false, 0.5, false);
+ const path = `/out_${Date.now()}.glb`;
+ using asciiPath = new oc.TCollection_AsciiString(path);
+ using writer = new oc.RWGltf_CafWriter(asciiPath, true);
+ using metadata = new oc.TColStd_IndexedDataMapOfStringString();
+ using progress = new oc.Message_ProgressRange();
+ writer.Perform(doc, metadata, progress);
+ const raw = oc.FS.readFile(path) as Uint8Array;
+ oc.FS.unlink(path);
+ return new Uint8Array(raw);
+};
+```
+
+The `new Uint8Array(raw)` copy is mandatory — `FS.readFile` returns a view into
+MEMFS that becomes invalid after `unlink`.
+
+## 5. Render in three.js
+
+```typescript title="src/main.ts"
+import * as THREE from 'three';
+import { GLTFLoader } from 'three/examples/jsm/loaders/GLTFLoader.js';
+import { OrbitControls } from 'three/examples/jsm/controls/OrbitControls.js';
+import { buildFilletedBox } from './build-shape';
+import { shapeToGlb } from './shape-to-glb';
+
+const canvas = document.querySelector('#viewer')!;
+const renderer = new THREE.WebGLRenderer({ canvas, antialias: true });
+const scene = new THREE.Scene();
+const camera = new THREE.PerspectiveCamera(45, 1, 0.1, 5000);
+camera.position.set(100, 100, 100);
+scene.add(new THREE.AmbientLight(0xffffff, 0.5));
+const dir = new THREE.DirectionalLight(0xffffff, 1);
+dir.position.set(1, 1, 1);
+scene.add(dir);
+new OrbitControls(camera, renderer.domElement);
+
+const shape = await buildFilletedBox();
+const glb = await shapeToGlb(shape);
+new GLTFLoader().parse(glb.buffer, '', (gltf) => scene.add(gltf.scene));
+
+renderer.setAnimationLoop(() => renderer.render(scene, camera));
+```
+
+Visit `localhost:5173` and you'll see a filleted gray box you can orbit.
+
+> **Want threading?** For batch meshing and boolean workloads, import `@taucad/opencascade.js/multi` instead of the default export. Browser deployments require COOP/COEP headers — see the [Multi-threaded build guide](../guides/multi-threading) and [Bundler & locateFile — Multi-threaded variant](../guides/bundler-locatefile#multi-threaded-variant).
+
+## Next steps
+
+- Need a different bundler? See [Bundler & locateFile](../guides/bundler-locatefile).
+- Want a smaller wasm? See [Trim symbols](../guides/trim-symbols).
+- Looking for STEP instead of GLB? See [Export STEP](../guides/export-step).
diff --git a/docs-site/content/docs/package/getting-started/what-is-opencascade-js.mdx b/docs-site/content/docs/package/getting-started/what-is-opencascade-js.mdx
new file mode 100644
index 00000000..6c56dbab
--- /dev/null
+++ b/docs-site/content/docs/package/getting-started/what-is-opencascade-js.mdx
@@ -0,0 +1,45 @@
+---
+title: What is OpenCascade.js
+description: One-page concept — what OpenCascade.js is, why it exists, and when to reach for it.
+---
+
+`@taucad/opencascade.js` brings the OpenCASCADE Technology kernel — a 30-year-old
+production-grade BRep CAD library — into the WebAssembly runtime. Every public
+OCCT symbol the package configures becomes a TypeScript class with overloaded
+constructors, typed methods, and full `.d.ts` coverage.
+
+## Why a CAD kernel in WebAssembly
+
+Browser-native CAD historically meant polygon-only mesh editing. A BRep kernel
+gives you:
+
+- **Exact geometry** — curves and surfaces are analytic, not polygonal. Booleans,
+ fillets, chamfers, threads all run on parametric primitives.
+- **Standards-grade interchange** — read and write STEP (`AP214` / `AP242`), IGES,
+ STL, and GLB out of the box; no external tooling required.
+- **Full feature parity with desktop CAD** — `BRepPrimAPI_*` primitives,
+ `BRepAlgoAPI_*` booleans, `BRepFilletAPI_*` fillets, `XCAF*` for assemblies
+ and materials.
+
+## When to use OpenCascade.js
+
+| Use case | Good fit | Bad fit |
+|---|---|---|
+| Parametric CAD app | Yes | — |
+| STEP / IGES interchange | Yes | — |
+| Procedural mesh generation | Yes | three.js or manifold-3d may be lighter |
+| Real-time interactive booleans (>60 fps) | Maybe — measure first | Reach for manifold-3d |
+| Cloud STEP-to-GLB conversion | Yes | — |
+
+## When NOT to use it
+
+- You only need polygon meshes — `three.js` + `manifold-3d` is smaller and faster.
+- You need sub-megabyte wasm — full OCCT is ~38 MB; even trimmed it sits at ~12 MB
+ for a typical "box + boolean + export" surface.
+- You need synchronous-only call sites — every `init` returns a Promise.
+
+## Where to next
+
+- [Quickstart — npm](./quick-start-npm) — render a box in 20 lines of TypeScript.
+- [Trim symbols](../guides/trim-symbols) — cut the wasm from 38 MB down to what your app uses.
+- [API Reference](/docs/package/api) — search every bound class and method.
diff --git a/docs-site/content/docs/package/guides/bundler-locatefile.mdx b/docs-site/content/docs/package/guides/bundler-locatefile.mdx
new file mode 100644
index 00000000..b878e01a
--- /dev/null
+++ b/docs-site/content/docs/package/guides/bundler-locatefile.mdx
@@ -0,0 +1,248 @@
+---
+title: Bundler & locateFile
+description: How to wire the OCCT wasm asset in Vite, Next.js, Bun, Deno, and plain Node.
+---
+
+`init()` accepts a `locateFile` callback that returns the URL where the runtime
+should fetch the wasm binary. The right answer depends on your bundler.
+
+The package exposes the binary through the `@taucad/opencascade.js/wasm`
+subpath export. Every snippet on this page resolves the wasm through that
+specifier; resolving it any other way (deep `node_modules` paths, direct
+`dist/*` imports) bypasses the package's `exports` map and breaks under
+strict bundler resolution.
+
+## Vite 6+
+
+Vite's `?url` suffix turns any asset import into a content-hashed URL string.
+Use it for both dev and production:
+
+```typescript
+import init from '@taucad/opencascade.js';
+import wasmUrl from '@taucad/opencascade.js/wasm?url';
+
+const oc = await init({ locateFile: () => wasmUrl });
+```
+
+Add `@taucad/opencascade.js` to `optimizeDeps.exclude` in `vite.config.ts` so
+Vite skips its dep-optimizer for the binary module:
+
+```typescript title="vite.config.ts"
+import { defineConfig } from 'vite';
+export default defineConfig({
+ optimizeDeps: { exclude: ['@taucad/opencascade.js'] },
+});
+```
+
+## Next.js 15 (App Router)
+
+Next's App Router lacks a first-class `?url` wasm import. The reliable pattern
+is to copy the wasm into `public/` at install time via a postinstall script
+that resolves the subpath:
+
+```javascript title="scripts/copy-wasm.mjs"
+import { copyFile, mkdir } from 'node:fs/promises';
+import { fileURLToPath } from 'node:url';
+
+const src = fileURLToPath(import.meta.resolve('@taucad/opencascade.js/wasm'));
+await mkdir('public', { recursive: true });
+await copyFile(src, 'public/opencascade_full.wasm');
+```
+
+```json title="package.json"
+{
+ "scripts": {
+ "postinstall": "node scripts/copy-wasm.mjs"
+ }
+}
+```
+
+Then reference the public path:
+
+```typescript title="lib/ocjs-init.ts"
+'use client';
+import init from '@taucad/opencascade.js';
+
+let ocPromise: ReturnType | undefined;
+export const getOc = () => (ocPromise ??= init({ locateFile: () => '/opencascade_full.wasm' }));
+```
+
+Mark `@taucad/opencascade.js` as a server external package if you only call it
+client-side:
+
+```typescript title="next.config.ts"
+import type { NextConfig } from 'next';
+const config: NextConfig = {
+ serverExternalPackages: ['@taucad/opencascade.js'],
+};
+export default config;
+```
+
+## Bun
+
+Bun resolves wasm imports natively. The `?url` pattern works identically to
+Vite. No extra config required.
+
+## Node (ESM)
+
+Use `import.meta.resolve` to find the wasm sibling to the loader:
+
+```typescript
+import { fileURLToPath } from 'node:url';
+import { dirname, join } from 'node:path';
+import init from '@taucad/opencascade.js';
+
+const WASM_DIR = dirname(
+ fileURLToPath(import.meta.resolve('@taucad/opencascade.js/wasm')),
+);
+
+const oc = await init({ locateFile: (file: string) => join(WASM_DIR, file) });
+```
+
+## Deno
+
+Deno exposes the same `import.meta.resolve` API as Node 22+. The Node snippet
+above works unchanged.
+
+## Webpack 5
+
+Webpack 5 handles wasm via `asset/resource` (preferred) or the legacy
+`file-loader`. Wire `locateFile` to the emitted URL:
+
+```typescript title="src/ocjs-init.ts"
+import init from '@taucad/opencascade.js';
+import wasmUrl from '@taucad/opencascade.js/wasm';
+
+const oc = await init({
+ locateFile: (file) => (file.endsWith('.wasm') ? wasmUrl : file),
+});
+```
+
+```javascript title="webpack.config.js"
+module.exports = {
+ module: {
+ rules: [
+ {
+ test: /\.wasm$/,
+ type: 'asset/resource',
+ },
+ ],
+ },
+ resolve: {
+ fallback: {
+ fs: false,
+ perf_hooks: false,
+ os: false,
+ path: false,
+ worker_threads: false,
+ crypto: false,
+ stream: false,
+ },
+ },
+};
+```
+
+Mark `@taucad/opencascade.js` as an external or exclude it from aggressive
+bundle inlining — the 12+ MB wasm must stay a separate fetch.
+
+## Legacy bundlers
+
+Create-React-App, `react-app-rewired`, and Webpack 4 are **not supported** in
+V3 docs. The upstream Docusaurus site preserved CRA recipes in git history at
+[`website/docs/02-getting-started/02-configure-bundler.md`](https://github.com/taucad/opencascade.js/blob/master/website/docs/02-getting-started/02-configure-bundler.md)
+(recoverable via `git show HEAD:website/docs/02-getting-started/02-configure-bundler.md`
+in this repo). Use Vite, Next 15, Bun, Node, Deno, or Webpack 5 instead.
+
+## Common pitfalls
+
+- **`locateFile` is mandatory**. The single-file V3 build does not auto-discover
+ its wasm sibling — every consumer must provide a URL.
+- **Don't bundle the wasm inline**. Bundling the 12+ MB binary as base64 explodes
+ your JS payload and prevents the browser's wasm streaming compiler.
+- **Cache the `init` Promise**. Re-calling `init()` re-instantiates the wasm
+ module — always memoize behind a singleton.
+
+## Multi-threaded variant
+
+The pthread-enabled build ships under `@taucad/opencascade.js/multi` with wasm at `@taucad/opencascade.js/multi/wasm`. The `init` contract is identical — only the import path and wasm target change.
+
+**Browser prerequisite:** every page that loads the threaded wasm must send cross-origin isolation headers:
+
+```http
+Cross-Origin-Opener-Policy: same-origin
+Cross-Origin-Embedder-Policy: require-corp
+```
+
+Without these headers, browsers refuse to expose `SharedArrayBuffer` and the wasm fails to instantiate. See the [multi-threaded build guide](./multi-threading) for benchmarks and when not to ship threaded.
+
+Run the following **once** after `await init(...)` in every recipe below — it matches the benchmark harness and is required for full speedup on mesh/boolean workloads:
+
+```typescript
+oc.BOPAlgo_Options.SetParallelMode(true);
+oc.BRepMesh_IncrementalMesh.SetParallelDefault(true);
+const pool = oc.OSD_ThreadPool.DefaultPool(-1);
+pool.SetNbDefaultThreadsToLaunch(pool.NbThreads());
+```
+
+### Vite 6+
+
+```typescript
+import init from '@taucad/opencascade.js/multi';
+import wasmUrl from '@taucad/opencascade.js/multi/wasm?url';
+
+const oc = await init({ locateFile: () => wasmUrl });
+
+oc.BOPAlgo_Options.SetParallelMode(true);
+oc.BRepMesh_IncrementalMesh.SetParallelDefault(true);
+const pool = oc.OSD_ThreadPool.DefaultPool(-1);
+pool.SetNbDefaultThreadsToLaunch(pool.NbThreads());
+```
+
+### Next.js 15 (App Router)
+
+Copy the MT wasm into `public/` at install time:
+
+```javascript title="scripts/copy-wasm-multi.mjs"
+import { copyFile, mkdir } from 'node:fs/promises';
+import { fileURLToPath } from 'node:url';
+
+const src = fileURLToPath(import.meta.resolve('@taucad/opencascade.js/multi/wasm'));
+await mkdir('public', { recursive: true });
+await copyFile(src, 'public/opencascade_full_multi.wasm');
+```
+
+```typescript title="lib/ocjs-init-multi.ts"
+'use client';
+import init from '@taucad/opencascade.js/multi';
+
+let ocPromise: ReturnType | undefined;
+export const getOcMulti = () =>
+ (ocPromise ??= init({ locateFile: () => '/opencascade_full_multi.wasm' }).then((oc) => {
+ oc.BOPAlgo_Options.SetParallelMode(true);
+ oc.BRepMesh_IncrementalMesh.SetParallelDefault(true);
+ const pool = oc.OSD_ThreadPool.DefaultPool(-1);
+ pool.SetNbDefaultThreadsToLaunch(pool.NbThreads());
+ return oc;
+ }));
+```
+
+### Node (ESM)
+
+```typescript
+import { fileURLToPath } from 'node:url';
+import { dirname, join } from 'node:path';
+import init from '@taucad/opencascade.js/multi';
+
+const WASM_DIR = dirname(
+ fileURLToPath(import.meta.resolve('@taucad/opencascade.js/multi/wasm')),
+);
+
+const oc = await init({ locateFile: (file: string) => join(WASM_DIR, file) });
+
+oc.BOPAlgo_Options.SetParallelMode(true);
+oc.BRepMesh_IncrementalMesh.SetParallelDefault(true);
+const pool = oc.OSD_ThreadPool.DefaultPool(-1);
+pool.SetNbDefaultThreadsToLaunch(pool.NbThreads());
+```
+
+Per-call overrides (`SetRunParallel(true)`, `BRepMesh_IncrementalMesh(..., isInParallel=true)`) remain available for granular opt-in. See [Multi-threaded build — Per-call activation](./multi-threading#per-call-activation--granular).
diff --git a/docs-site/content/docs/package/guides/debugging-wasm-exceptions.mdx b/docs-site/content/docs/package/guides/debugging-wasm-exceptions.mdx
new file mode 100644
index 00000000..f2dca989
--- /dev/null
+++ b/docs-site/content/docs/package/guides/debugging-wasm-exceptions.mdx
@@ -0,0 +1,75 @@
+---
+title: Debugging wasm exceptions
+description: Decode WebAssembly.Exception into actionable error messages with getExceptionMessage.
+---
+
+When OCCT throws a `Standard_Failure` inside the wasm module, the value that
+reaches your JS try/catch is a `WebAssembly.Exception` object. Printing it
+with `console.error(error)` yields `[object WebAssembly.Exception]` — useless.
+
+`@taucad/opencascade.js@beta` exposes `getExceptionMessage(error)` to decode
+the C++ failure into a string.
+
+## The pattern
+
+```typescript
+import init, { getExceptionMessage } from '@taucad/opencascade.js';
+
+const oc = await init({ locateFile });
+
+try {
+ using fillet = new oc.BRepFilletAPI_MakeFillet(badShape);
+ fillet.Shape(); // may throw
+} catch (error: unknown) {
+ if (error instanceof WebAssembly.Exception) {
+ console.error('OCCT failure:', getExceptionMessage(error));
+ } else {
+ throw error;
+ }
+}
+```
+
+`getExceptionMessage` reaches into the wasm-side `Standard_Failure::GetMessageString()`
+and returns the text OCCT actually attached to the exception (e.g.
+`"BRepFilletAPI_MakeFillet: Empty argument"`).
+
+## Why not just `error.message`?
+
+`WebAssembly.Exception` is a JS host object — its `message` field is empty for
+C++-thrown values. The actual text lives in C++ memory, addressable only by
+walking back into the wasm module.
+
+## Common OCCT exceptions
+
+| Message fragment | Likely cause |
+|---|---|
+| `Standard_OutOfRange` | Index past the end of an `NCollection_*` container |
+| `Standard_NullObject` | Method called on a null `Handle` (forgot to check `.IsNull()`) |
+| `Standard_NoSuchObject` | Map lookup returned nothing |
+| `Standard_TypeMismatch` | Downcast to the wrong `TopoDS_*` subtype |
+| `BRepAlgoAPI_*: ...` | Boolean failure — usually self-intersecting input |
+| `BRepFilletAPI_MakeFillet: ...` | Fillet radius too large, or degenerate edge |
+| `STEPControl_Writer: write.step.schema not set` | Forgot `Interface_Static.SetIVal('write.step.schema', 5)` |
+
+## Async-safe pattern
+
+If your call site awaits between the `try` and the throw, wrap the offending
+synchronous block tightly:
+
+```typescript
+const filletShape = await runOcctSync(() => {
+ using fillet = new oc.BRepFilletAPI_MakeFillet(shape);
+ for (const edge of edges) fillet.Add(3, edge);
+ return fillet.Shape();
+});
+```
+
+Wide async try/catch boundaries swallow the `WebAssembly.Exception` type
+discriminator on some engines.
+
+## Debug builds
+
+For deep debugging, build with `-g -fwasm-exceptions -O1` and load
+[Chrome's wasm DWARF debugger](https://developer.chrome.com/blog/wasm-debugging-2020).
+You get the original C++ frames in the call stack — invaluable when an OCCT
+exception originates ten frames deep in `BOPAlgo_PaveFiller`.
diff --git a/docs-site/content/docs/package/guides/export-gltf.mdx b/docs-site/content/docs/package/guides/export-gltf.mdx
new file mode 100644
index 00000000..873e91e4
--- /dev/null
+++ b/docs-site/content/docs/package/guides/export-gltf.mdx
@@ -0,0 +1,85 @@
+---
+title: Export glTF / GLB
+description: RWGltf_CafWriter pipeline with XCAF documents, materials, and assembly support.
+---
+
+GLB is the binary single-file flavour of glTF and the format three.js, Babylon,
+Filament, and most realtime renderers consume natively. OCCT writes it via the
+`RWGltf_CafWriter` against an XCAF document.
+
+## Minimal single-shape GLB
+
+```typescript
+import type { TopoDS_Shape } from '@taucad/opencascade.js';
+import { getOc } from './ocjs-init';
+
+export const shapeToGlb = async (shape: TopoDS_Shape): Promise => {
+ const oc = await getOc();
+
+ using docName = new oc.TCollection_ExtendedString('doc', true);
+ const doc = new oc.TDocStd_Document(docName);
+ const shapeTool = oc.XCAFDoc_DocumentTool.ShapeTool(doc.Main()).get();
+ shapeTool.AddShape(shape, false, false);
+
+ using _mesh = new oc.BRepMesh_IncrementalMesh(shape, 0.1, false, 0.5, false);
+
+ const path = `/out_${Date.now()}.glb`;
+ using asciiPath = new oc.TCollection_AsciiString(path);
+ using writer = new oc.RWGltf_CafWriter(asciiPath, true); // true = binary GLB
+ using metadata = new oc.TColStd_IndexedDataMapOfStringString();
+ using progress = new oc.Message_ProgressRange();
+ writer.Perform(doc, metadata, progress);
+
+ const raw = oc.FS.readFile(path) as Uint8Array;
+ oc.FS.unlink(path);
+ return new Uint8Array(raw);
+};
+```
+
+## Per-shape PBR material
+
+Attach a `XCAFDoc_VisMaterial` to a shape label and the GLB writer emits a glTF
+`materials[]` entry with PBR base color, metalness, and roughness.
+
+```typescript
+const shapeLabel = shapeTool.AddShape(shape, false, false);
+
+using matName = new oc.TCollection_AsciiString('Brass');
+const vmTool = oc.XCAFDoc_DocumentTool.VisMaterialTool(doc.Main()).get();
+using visMat = new oc.XCAFDoc_VisMaterial();
+using pbr = new oc.XCAFDoc_VisMaterialPBR();
+pbr.BaseColor = new oc.Quantity_ColorRGBA(0.85, 0.65, 0.13, 1);
+pbr.Metallic = 0.9;
+pbr.Roughness = 0.25;
+visMat.SetPbrMaterial(pbr);
+const matLabel = vmTool.AddMaterial(visMat, matName);
+vmTool.SetShapeMaterial(shapeLabel, matLabel);
+```
+
+## Tessellation tolerances
+
+`BRepMesh_IncrementalMesh(shape, linearDeflection, isRelative, angularDeflection, inParallel)`
+
+| Param | Typical value | Effect |
+|---|---|---|
+| linearDeflection | 0.05 – 0.5 mm | Max chord–surface distance |
+| isRelative | `false` | When `true`, deflection scales with bbox |
+| angularDeflection | 0.5 rad | Max angle between facets along a curve |
+| inParallel | `false` | Single-threaded in browser builds |
+
+Tighten linear deflection for small features (M3 threads need ~0.01 mm).
+OCCT caches triangulation on the shape; pass `decreate=true` as the third
+positional argument to force regeneration when you change tolerances.
+
+## Coordinate system
+
+GLB is **Y-up** by convention; OCCT is **Z-up**. `RWGltf_CafWriter` emits Z-up
+data and lets the consumer interpret it. Most three.js workflows pre-rotate
+the scene with `-Math.PI/2` around the X axis to align with glTF Y-up
+expectations.
+
+## Validating the output
+
+- [glTF Viewer (Don McCurdy)](https://gltf-viewer.donmccurdy.com/) — drag-drop validation.
+- [gltf-validator](https://github.com/KhronosGroup/glTF-Validator) — Node CLI for CI.
+- Open in Blender — full PBR roundtrip with materials.
diff --git a/docs-site/content/docs/package/guides/export-step.mdx b/docs-site/content/docs/package/guides/export-step.mdx
new file mode 100644
index 00000000..8e589037
--- /dev/null
+++ b/docs-site/content/docs/package/guides/export-step.mdx
@@ -0,0 +1,108 @@
+---
+title: Export STEP
+description: Write AP214 / AP242 STEP files via STEPControl_Writer and STEPCAFControl_Writer for assemblies.
+---
+
+STEP is the de-facto interchange format for parametric CAD. OCCT exposes two
+writers depending on whether you need an assembly tree.
+
+## Single shape — STEPControl_Writer
+
+```typescript
+import type { TopoDS_Shape } from '@taucad/opencascade.js';
+import { getOc } from './ocjs-init';
+
+export const shapeToStep = async (shape: TopoDS_Shape): Promise => {
+ const oc = await getOc();
+ using writer = new oc.STEPControl_Writer();
+ using progress = new oc.Message_ProgressRange();
+ oc.Interface_Static.SetIVal('write.step.schema', 5); // AP214
+
+ const transferStatus = writer.Transfer(
+ shape,
+ oc.STEPControl_StepModelType.STEPControl_AsIs,
+ true,
+ progress,
+ );
+ if (transferStatus !== oc.IFSelect_ReturnStatus.IFSelect_RetDone) {
+ throw new Error('STEP Transfer failed');
+ }
+
+ const path = `/out_${Date.now()}.step`;
+ const writeStatus = writer.Write(path);
+ if (writeStatus !== oc.IFSelect_ReturnStatus.IFSelect_RetDone) {
+ throw new Error('STEP Write failed');
+ }
+
+ const raw = oc.FS.readFile(path) as Uint8Array;
+ oc.FS.unlink(path);
+ return new Uint8Array(raw);
+};
+```
+
+Two return-status checks are mandatory — OCCT silently produces a zero-byte
+file otherwise.
+
+## Multi-shape assembly — STEPCAFControl_Writer
+
+For assemblies with named parts, per-shape colors, or PBR materials, write the
+shape into an XCAF document first, then use `STEPCAFControl_Writer.Perform`.
+**Never** use the empty-filename `Transfer` overload — it silently activates
+multi-file mode and emits an empty STEP body.
+
+```typescript
+import { getOc } from './ocjs-init';
+
+export const assemblyToStep = async (shapes: Array<{ name: string; shape: TopoDS_Shape }>) => {
+ const oc = await getOc();
+ using docName = new oc.TCollection_ExtendedString('doc', true);
+ const doc = new oc.TDocStd_Document(docName);
+ const shapeTool = oc.XCAFDoc_DocumentTool.ShapeTool(doc.Main()).get();
+
+ for (const { name, shape } of shapes) {
+ const label = shapeTool.AddShape(shape, false, false);
+ using nameStr = new oc.TCollection_ExtendedString(name, true);
+ oc.TDataStd_Name.Set(label, nameStr);
+ }
+
+ using writer = new oc.STEPCAFControl_Writer();
+ using progress = new oc.Message_ProgressRange();
+ oc.Interface_Static.SetIVal('write.step.schema', 5);
+
+ const path = `/asm_${Date.now()}.step`;
+ const ok = writer.Perform(doc, path, progress);
+ if (!ok) throw new Error('STEP assembly write failed');
+
+ const raw = oc.FS.readFile(path) as Uint8Array;
+ oc.FS.unlink(path);
+ return new Uint8Array(raw);
+};
+```
+
+## Schema selection
+
+| Code | Schema | Use when |
+|---|---|---|
+| 1 | AP203 (config control) | Legacy mech CAD; avoid for new work |
+| 4 | AP214 (auto industry) | Default — broad tool support |
+| 5 | AP214 (alt revision) | Recommended for new projects |
+| 6 | AP242 (managed model-based) | If you need PMI / PBR materials |
+
+AP242 emits the same geometry as AP214 plus product manufacturing information
+attached to the model. Most consumers (Fusion 360, SolidWorks, FreeCAD)
+auto-detect schema and treat 5 and 6 interchangeably for pure geometry.
+
+## Bytes out, file in
+
+- **Browser**: `URL.createObjectURL(new Blob([bytes], { type: 'application/step' }))`
+ and trigger a download via a hidden `` tag.
+- **Node**: `fs.writeFileSync('out.step', bytes)`.
+- **Cloud**: pipe directly to S3 / GCS as `application/octet-stream`.
+
+## Common pitfalls
+
+- Check `IFSelect_RetDone` after **both** `Transfer` and `Write` — partial
+ failures are silent otherwise.
+- Always `unlink` the MEMFS path after `FS.readFile` to free the wasm heap.
+- Copy bytes out of MEMFS (`new Uint8Array(raw)`) — the original view becomes
+ detached after `unlink`.
diff --git a/docs-site/content/docs/package/guides/multi-threading.mdx b/docs-site/content/docs/package/guides/multi-threading.mdx
new file mode 100644
index 00000000..ad87a96a
--- /dev/null
+++ b/docs-site/content/docs/package/guides/multi-threading.mdx
@@ -0,0 +1,210 @@
+---
+title: Multi-threaded build
+description: Opt into pthread-enabled OCCT for parallel meshing and boolean workloads via @taucad/opencascade.js/multi.
+---
+
+The npm package ships **two** pre-built variants:
+
+| Import | Binary | When to use |
+| --- | --- | --- |
+| `@taucad/opencascade.js` (default) | `opencascade_full.wasm` | Embeddable widgets, one-op-per-click UX, no COOP/COEP |
+| `@taucad/opencascade.js/multi` | `opencascade_full_multi.wasm` | Batch mesh/boolean, STEP→glTF pipelines, COOP/COEP-isolated surfaces |
+
+Load the threaded variant the same way as the default — import `@taucad/opencascade.js/multi` and resolve wasm through `@taucad/opencascade.js/multi/wasm`. See [Bundler & locateFile](./bundler-locatefile#multi-threaded-variant) for Vite, Next.js, and Node recipes.
+
+OCCT can drive multiple worker threads for mesh and boolean kernels once the pthread-enabled wasm is loaded. That requires hard browser prerequisites (`SharedArrayBuffer` + cross-origin isolation) in the browser; Node 22+ exposes `SharedArrayBuffer` without extra headers.
+
+## When to consider it
+
+| Operation | Speedup with 4 threads | Worth the COOP/COEP cost? |
+|---|---:|---|
+| `BRepMesh_IncrementalMesh` on large assemblies | 2.5–3.5× | Yes, for visualisation pipelines |
+| `BRepAlgoAPI_*` booleans on hundreds of operands | 2–3× | Yes, for batch CAD operations |
+| `STEPControl_Reader.Transfer` of large STEP files | 1.5–2× | Marginal — IO usually dominates |
+| Single-shape build (box + fillet + export) | 1.0× | No |
+
+If your app does one boolean and one mesh per user interaction, single-threaded
+is fine. If you batch hundreds of operations, threading pays off.
+
+See [BENCHMARKS.md](https://github.com/taucad/opencascade.js/blob/main/BENCHMARKS.md) for ST vs MT numbers on a representative workload mix.
+
+## Browser prerequisites
+
+Pthread builds use `SharedArrayBuffer`, which browsers gate behind
+**cross-origin isolation**. Your server must send:
+
+```http
+Cross-Origin-Opener-Policy: same-origin
+Cross-Origin-Embedder-Policy: require-corp
+```
+
+…on every page that imports the threaded wasm. Without these headers, browsers
+refuse to expose `SharedArrayBuffer` and the wasm fails to instantiate.
+
+Node 22+ exposes `SharedArrayBuffer` unconditionally — no headers needed.
+
+## Triggering OCCT parallelism
+
+OCCT respects its own `OSD_Parallel` switches once threads exist. Two
+levels of activation are available — **per-call** (granular, opt-in at
+each site) and **global** (sets a process-wide default).
+
+### Global activation — call once at startup
+
+The cleanest option: flip the OCCT-wide defaults once, then any subsequent
+call to a parallel-aware API inherits the toggle without an extra argument.
+
+```typescript
+// Run once after `await init({...})`.
+oc.BOPAlgo_Options.SetParallelMode(true); // booleans
+oc.BRepMesh_IncrementalMesh.SetParallelDefault(true); // meshing
+
+// Right-size the OCCT thread pool to all logical CPUs. -1 means
+// "use NbLogicalProcessors". SetNbDefaultThreadsToLaunch caps the
+// fan-out of any single OCCT call; default is the pool size.
+const pool = oc.OSD_ThreadPool.DefaultPool(-1);
+pool.SetNbDefaultThreadsToLaunch(pool.NbThreads());
+```
+
+After these four calls every `new BRepMesh_IncrementalMesh(shape, lin)` and
+every `BRepAlgoAPI_*` automatically fans out across the pool. **No
+per-call argument required.**
+
+Skipping the pool sizing leaves OCCT's lazy default pool smaller than the
+pre-spawned worker count baked into the binary (`PTHREAD_POOL_SIZE=navigator.hardwareConcurrency`)
+and caps speedup on mesh/boolean workloads.
+
+### Per-call activation — granular
+
+If you want to keep the global default off and opt in selectively:
+
+```typescript
+using mesh = new oc.BRepMesh_IncrementalMesh(
+ shape,
+ 0.1, // linear deflection
+ false, // not relative
+ 0.5, // angular deflection
+ true, // inParallel — flips multi-threading on
+);
+```
+
+```typescript
+using bop = new oc.BRepAlgoAPI_BuilderAlgo();
+bop.SetRunParallel(true);
+// ... AddArgument / AddTool / Build()
+```
+
+`SetRunParallel(false)` is the default for per-instance APIs. OCJS does
+not auto-enable it unless you flip the global default above.
+
+### Other parallel-aware APIs
+
+Beyond mesh and boolean, the following APIs accept a parallel flag and
+benefit when the pool is sized correctly:
+
+| API | Activation |
+|---|---|
+| `BRepExtrema_DistShapeShape` | `.SetMultiThread(true)` |
+| `BRepCheck_Analyzer` | ctor `(shape, /*isParallel*/ true)` |
+| `RWGltf_CafReader` | `.SetParallel(true)` (glTF **read**) |
+| `RWGltf_CafWriter` | `.SetParallel(true)` (glTF **write**) |
+| `BVH_Builder` | `.SetParallel(true)` |
+| `BRepLib_ValidateEdge`, `BRepLib_CheckCurveOnSurface`, `GeomLib_CheckCurveOnSurface` | `.SetParallel(true)` — used transitively by `BRepCheck_Analyzer` |
+| `BRepFill_AdvancedEvolved` | already parallel by default — call `SetParallelMode(false)` to disable |
+
+**STEP/IGES readers (`STEPControl_Reader`, `IGESControl_Reader`) and
+`BRepBuilderAPI_Sewing` are sequential** in current OCCT — there is no
+parallel flag to flip.
+
+## Costs
+
+- **COOP/COEP headers** lock you out of third-party iframes that don't opt in
+ (e.g. embedded Stripe checkout, some auth providers). Subdomain-isolate
+ your CAD surface if that matters.
+- **Thread spawn time** adds ~50–200 ms to init, scaling with pool size.
+ Memoise the `init()` Promise.
+- **Memory** scales with `PTHREAD_POOL_SIZE × STACK_SIZE`. With the
+ shipped `navigator.hardwareConcurrency` sizing, a 12-core box
+ reserves ~96 MB of stack on top of `INITIAL_MEMORY`.
+- **Debuggability** drops — `console.log` from worker threads doesn't always
+ reach the main thread.
+
+## Performance notes
+
+Pthread + `-sALLOW_MEMORY_GROWTH=1` carries a documented Emscripten
+performance penalty (the `-Wpthreads-mem-growth` advisory at link time):
+every JS↔WASM memory boundary crossing has to re-resolve `HEAP*` views
+after a potential `memory.grow`, and worker-thread access to `HEAPU8`/
+`HEAPF32` is gated on the views being up-to-date in each worker's
+context. The shipped binaries already mitigate the worst of this:
+
+- **mimalloc** is wired into the WASM allocator so per-thread allocation
+ bypasses the global malloc contention point. The `mallinfo` undefined
+ symbol you'll see in custom-build link logs is mimalloc's debug-stats
+ reporter — `wasm-ld` emits a single `-Wjs-compiler` warning for it
+ (the link permits it via the broad `-Wl,--allow-undefined` flag in
+ the shipped `emccFlags`) and the symbol is dead-code-eliminated at
+ module load. The warning is informational; no runtime call ever
+ resolves to it.
+- **Hoist `HEAP*` references out of hot loops** when calling OCJS from
+ TypeScript. The Emscripten glue re-fetches `Module.HEAPU8` etc. on every
+ access; pulling them into a local once per batch avoids the dispatch
+ penalty:
+
+```typescript
+// Slow — re-resolves HEAPU8 every iteration.
+for (let i = 0; i < n; i++) {
+ Module.HEAPU8[buf + i] = bytes[i];
+}
+
+// Fast — single resolve, then tight loop.
+const heap = Module.HEAPU8;
+for (let i = 0; i < n; i++) {
+ heap[buf + i] = bytes[i];
+}
+```
+
+### `toResizableBuffer()` support matrix (May 2026)
+
+The newer [`WebAssembly.Memory.prototype.toResizableBuffer()`](https://developer.mozilla.org/en-US/docs/WebAssembly/Reference/JavaScript_interface/Memory)
+API lets a pthread-enabled binary avoid the HEAP-view re-fetch dance
+entirely by returning a `SharedArrayBuffer` that automatically tracks
+`memory.grow`. The shipped `@taucad/opencascade.js/multi` binary keeps
+`-sGROWABLE_ARRAYBUFFERS=0` (the default) because the runtime matrix is
+not yet universal:
+
+| Runtime | Supports `toResizableBuffer()` |
+|---|---|
+| Chrome 144+ / Edge 144+ | Yes |
+| Firefox 145+ | Yes |
+| Safari 26.2+ (desktop + iOS) | Yes |
+| Node.js 22 / 24 | **No** — `TypeError: wasmMemory.toResizableBuffer is not a function` |
+| Bun (all current) | **No** |
+| Deno (all current) | **No** |
+| Samsung Internet | **No** (as of May 2026) |
+
+The default `full_multi.yml` therefore keeps `-sGROWABLE_ARRAYBUFFERS=0`
+so the binary stays compatible with Node-based test runners, Bun, Deno,
+and the legacy mobile browser. A **browser-only opt-in** variant ships
+via [`full_multi_browser.yml`](/docs/toolchain/guides/multi-threading#browser-only-mt-build)
+for deployments that have audited their runtime matrix and want the
+no-resize-dance fast path on the supported browsers.
+
+For most consumers the cost is invisible — OCCT's per-call cost on
+mesh/boolean dominates the HEAP-view re-fetch by 2-3 orders of magnitude.
+Reach for `full_multi_browser.yml` only when you've profiled and the
+JS↔WASM boundary is on the hot path.
+
+## When NOT to ship threaded
+
+- You can't (or won't) set COOP/COEP headers — most CDNs/marketing sites can't.
+- Your workload is one shape per second — Amdahl's law eats the speedup.
+- Your target users include Safari ≤16 — older Safari refused
+ `SharedArrayBuffer` in cross-origin-isolated contexts.
+
+For most consumers the single-threaded default wins on simplicity. Reach for
+`@taucad/opencascade.js/multi` only when you have measured the bottleneck.
+
+## Custom builds
+
+Need a smaller threaded binary (trimmed symbol list) or custom Emscripten flags? See [Toolchain — Custom multi-threaded build](/docs/toolchain/guides/multi-threading) for the YAML recipe and `PTHREAD_POOL_SIZE` rationale.
diff --git a/docs-site/content/docs/package/guides/render-with-three-js.mdx b/docs-site/content/docs/package/guides/render-with-three-js.mdx
new file mode 100644
index 00000000..a4a7bbc3
--- /dev/null
+++ b/docs-site/content/docs/package/guides/render-with-three-js.mdx
@@ -0,0 +1,72 @@
+---
+title: Render with three.js
+description: OCCT shape → GLB → three.js GLTFLoader with orbit controls and lights.
+---
+
+`@taucad/opencascade.js` produces GLB bytes through OCCT's XCAF + `RWGltf_CafWriter`
+pipeline. three.js consumes GLB via `GLTFLoader`. The whole flow is in-browser —
+no server round-trip.
+
+## End-to-end snippet
+
+```typescript title="src/render.ts"
+import * as THREE from 'three';
+import { GLTFLoader } from 'three/examples/jsm/loaders/GLTFLoader.js';
+import { OrbitControls } from 'three/examples/jsm/controls/OrbitControls.js';
+
+export const renderGlb = (canvas: HTMLCanvasElement, glb: Uint8Array): (() => void) => {
+ const renderer = new THREE.WebGLRenderer({ canvas, antialias: true });
+ renderer.setSize(canvas.clientWidth, canvas.clientHeight, false);
+ renderer.setPixelRatio(globalThis.devicePixelRatio);
+
+ const scene = new THREE.Scene();
+ scene.background = new THREE.Color(0x111111);
+
+ const camera = new THREE.PerspectiveCamera(45, canvas.clientWidth / canvas.clientHeight, 0.1, 5000);
+ camera.position.set(100, 100, 100);
+
+ scene.add(new THREE.AmbientLight(0xffffff, 0.5));
+ const dir = new THREE.DirectionalLight(0xffffff, 1);
+ dir.position.set(1, 1, 1);
+ scene.add(dir);
+
+ const controls = new OrbitControls(camera, renderer.domElement);
+ controls.target.set(0, 0, 0);
+
+ new GLTFLoader().parse(glb.buffer, '', (gltf) => scene.add(gltf.scene));
+
+ renderer.setAnimationLoop(() => {
+ controls.update();
+ renderer.render(scene, camera);
+ });
+
+ return () => renderer.dispose();
+};
+```
+
+## Why XCAF (and not raw triangle arrays)
+
+OCCT can hand you raw `Poly_Triangulation` arrays per face, but the XCAF + GLB
+path:
+
+- preserves per-face colors and PBR materials,
+- writes valid glTF metadata (asset version, extensions used),
+- handles multi-shape assemblies as separate primitives,
+- emits indexed buffers so three.js doesn't need to dedupe vertices.
+
+See [Export glTF / GLB](./export-gltf) for the full pipeline including PBR materials.
+
+## Common rendering issues
+
+| Symptom | Likely cause | Fix |
+|---|---|---|
+| Faceted curves (no smooth shading) | Mesh deflection too coarse | Tighten `BRepMesh_IncrementalMesh` linear deflection (e.g. 0.05) |
+| Black model | No lights | Add ambient + directional light; check `dir.position` is non-zero |
+| Model offset from origin | Shape has a transform baked in | Verify `TopLoc_Location` or apply `shape.Moved(loc, false)` |
+| GLB loads but invisible | Camera inside model | `camera.position.set(100, 100, 100)` and `controls.target.set(0, 0, 0)` |
+
+## Helper libraries
+
+For batch shape conversion (multi-shape assemblies, edges-as-fat-lines,
+hover-highlight), [`replicad-threejs-helper`](https://github.com/sgenoud/replicad)
+wraps the common patterns and works with `@taucad/opencascade.js@beta` directly.
diff --git a/docs-site/content/docs/package/guides/visualize-shape-helper.mdx b/docs-site/content/docs/package/guides/visualize-shape-helper.mdx
new file mode 100644
index 00000000..f16728bb
--- /dev/null
+++ b/docs-site/content/docs/package/guides/visualize-shape-helper.mdx
@@ -0,0 +1,65 @@
+---
+title: Visualize shape helper
+description: Reusable shape-to-GLB pipeline extracted from the per-example boilerplate.
+---
+
+Every example in this docs site can inline the XCAF → mesh → GLB → blob URL
+pipeline. This page documents the canonical helper so you can import it once
+instead of copying the boilerplate into every script.
+
+## `visualizeDoc`
+
+Build a GLB blob URL from an XCAF document that already contains tessellated shapes:
+
+```typescript title="lib/visualize.ts"
+import type { OpenCascadeInstance } from '@taucad/opencascade.js';
+
+export const visualizeDoc = async (
+ oc: OpenCascadeInstance,
+ doc: InstanceType,
+): Promise => {
+ using writer = new oc.RWGltf_CafWriter(new oc.TCollection_AsciiString_2('out.glb'), true);
+ writer.Perform(doc, new oc.TColStd_IndexedDataMapOfStringString(), new oc.Message_ProgressRange());
+
+ const fileName = 'out.glb';
+ const buffer = oc.FS.readFile(fileName, { encoding: 'binary' });
+ oc.FS.unlink(fileName);
+
+ const blob = new Blob([buffer], { type: 'model/gltf-binary' });
+ return URL.createObjectURL(blob);
+};
+```
+
+## `visualizeShapes`
+
+Convenience wrapper — accepts one or more `TopoDS_Shape` values, builds the XCAF
+document, meshes, and returns a GLB blob URL:
+
+```typescript title="lib/visualize.ts"
+import type { OpenCascadeInstance, TopoDS_Shape } from '@taucad/opencascade.js';
+
+export const visualizeShapes = async (
+ oc: OpenCascadeInstance,
+ ...shapes: TopoDS_Shape[]
+): Promise => {
+ using doc = new oc.TDocStd_Document(new oc.TCollection_ExtendedString_1());
+ const shapeTool = oc.XCAFDoc_DocumentTool.ShapeTool(doc.Main()).get();
+
+ for (const shape of shapes) {
+ using mesh = new oc.BRepMesh_IncrementalMesh(shape, 0.1, false, 0.1, false);
+ const newShape = shapeTool.NewShape();
+ shapeTool.SetShape(newShape, shape);
+ }
+
+ return visualizeDoc(oc, doc);
+};
+```
+
+## When to inline vs import
+
+- **First read**: keep the pipeline inline in tutorials so every step is visible.
+- **Production code**: import from a single `lib/visualize.ts` module.
+- **Multi-material assemblies**: build the XCAF document yourself (see
+ [Boolean logo](../examples/boolean-logo) for per-subset PBR assignment).
+
+See also: [Render with three.js](./render-with-three-js).
diff --git a/docs-site/content/docs/package/index.mdx b/docs-site/content/docs/package/index.mdx
new file mode 100644
index 00000000..d2206230
--- /dev/null
+++ b/docs-site/content/docs/package/index.mdx
@@ -0,0 +1,31 @@
+---
+title: Package
+description: Consume @taucad/opencascade.js from npm — render, export, integrate.
+---
+
+Install `@taucad/opencascade.js@beta`, call `init()`, build shapes with the full OCCT surface,
+export STEP or GLB, and integrate into your bundler of choice.
+
+
+
+ Install the package, render a box, export STEP in 4 minutes.
+
+
+ Build a filleted box and render it in three.js end-to-end.
+
+
+ All 4,587 bound classes — searchable, fragment-stable, LLM-ingestible.
+
+
+ Fork status, maintenance model, and how to contribute.
+
+
+
+## What's in V3
+
+- ESM-only single-file build — one wasm, one `init()` Promise, no CommonJS fallback.
+- Suffix-free symbol generation — `gp_Pnt` (not `gp_Pnt_3`); overloads dispatched in C++.
+- `using` syntax for every disposable shape — RBV containers integrate `Symbol.dispose`.
+- Re-architected exception channel — catch JS errors instead of opaque `WebAssembly.Exception`.
+
+See `CHANGELOG.md` in the repo for the full release notes.
diff --git a/docs-site/content/docs/package/meta.json b/docs-site/content/docs/package/meta.json
new file mode 100644
index 00000000..c9d95cb4
--- /dev/null
+++ b/docs-site/content/docs/package/meta.json
@@ -0,0 +1,39 @@
+{
+ "title": "Package",
+ "description": "Consume @taucad/opencascade.js from npm — render, export, integrate.",
+ "icon": "lib:npm",
+ "root": true,
+ "pages": [
+ "index",
+ "---Getting Started---",
+ "getting-started/quick-start-npm",
+ "getting-started/what-is-opencascade-js",
+ "getting-started/first-shape-tutorial",
+ "getting-started/faq",
+ "getting-started/projects-using-opencascade-js",
+ "---Guides---",
+ "guides/bundler-locatefile",
+ "guides/multi-threading",
+ "guides/debugging-wasm-exceptions",
+ "guides/export-step",
+ "guides/export-gltf",
+ "guides/render-with-three-js",
+ "guides/visualize-shape-helper",
+ "---Examples---",
+ "examples/boolean-logo",
+ "examples/classic-bottle",
+ "examples/polygon-extrusion",
+ "---Concepts---",
+ "concepts/calling-occt-from-js",
+ "concepts/memory-and-disposables",
+ "concepts/handles-and-collections",
+ "concepts/return-shapes",
+ "---Reference---",
+ "api",
+ "reference/ocjs-package-api/init-function",
+ "reference/ocjs-package-api/module-shape",
+ "reference/ocjs-package-api/exception-classes",
+ "---Playground---",
+ "playground/index"
+ ]
+}
diff --git a/docs-site/content/docs/package/playground/index.mdx b/docs-site/content/docs/package/playground/index.mdx
new file mode 100644
index 00000000..cae1fbe9
--- /dev/null
+++ b/docs-site/content/docs/package/playground/index.mdx
@@ -0,0 +1,19 @@
+---
+title: Playground
+description: Live, parameterisable OCJS examples — coming once @taucad/runtime ships to npm.
+---
+
+
+
+The **Playground** replaces the legacy Docusaurus live `js ocjs` code blocks with
+a Fumadocs `` component backed by [`@taucad/runtime`](https://github.com/taucad/tau).
+That package is not yet published as a standalone npm release.
+
+Until it ships, examples remain static code blocks. Track progress in the
+[OpenCascade.js repo](https://github.com/taucad/opencascade.js).
+
+
+
+When the Playground lands, every example under [Examples](../examples/boolean-logo)
+will expose live previews with parameter sliders — the same UX as the original
+`ocjs.org` site, but built on `@taucad/runtime` instead of a bespoke Comlink worker.
diff --git a/docs-site/content/docs/package/reference/ocjs-package-api/exception-classes.mdx b/docs-site/content/docs/package/reference/ocjs-package-api/exception-classes.mdx
new file mode 100644
index 00000000..157e571a
--- /dev/null
+++ b/docs-site/content/docs/package/reference/ocjs-package-api/exception-classes.mdx
@@ -0,0 +1,59 @@
+---
+title: Exception classes
+description: OCCT exception class hierarchy and the JS-side getExceptionMessage helper.
+---
+
+OCCT throws subclasses of `Standard_Failure`. Inside the wasm module, every
+throw becomes a `WebAssembly.Exception` instance whose payload is the C++
+object. The OCJS bindings expose:
+
+- The exception class hierarchy via bound classes (`oc.Standard_Failure`,
+ `oc.Standard_OutOfRange`, etc.).
+- `getExceptionMessage(error)` — a helper that decodes a `WebAssembly.Exception`
+ into the OCCT failure text.
+
+## Hierarchy
+
+```text
+Standard_Failure
+├── Standard_OutOfRange
+├── Standard_NullObject
+├── Standard_NoSuchObject
+├── Standard_TypeMismatch
+├── Standard_DomainError
+├── Standard_DivideByZero
+└── Standard_ProgramError
+ └── Standard_NotImplemented
+```
+
+Every subclass surfaces a `GetMessageString()` and inherits the `What()`
+method returning a static identifier.
+
+## `getExceptionMessage(error)`
+
+Named export of `@taucad/opencascade.js`. Accepts a `WebAssembly.Exception`
+and returns a string.
+
+```typescript
+import init, { getExceptionMessage } from '@taucad/opencascade.js';
+
+try {
+ riskyOcctCall();
+} catch (error: unknown) {
+ if (error instanceof WebAssembly.Exception) {
+ console.error('OCCT failure:', getExceptionMessage(error));
+ return;
+ }
+ throw error;
+}
+```
+
+## What about JS-side `Error.message`?
+
+`WebAssembly.Exception.message` is empty for C++-thrown values. The real
+message lives in C++ memory and must be reached through the helper above.
+
+## Related
+
+- [Debugging WASM exceptions](../../guides/debugging-wasm-exceptions) — narrative
+ debugging guide with common failure modes and chrome wasm debugger setup.
diff --git a/docs-site/content/docs/package/reference/ocjs-package-api/init-function.mdx b/docs-site/content/docs/package/reference/ocjs-package-api/init-function.mdx
new file mode 100644
index 00000000..04a45943
--- /dev/null
+++ b/docs-site/content/docs/package/reference/ocjs-package-api/init-function.mdx
@@ -0,0 +1,61 @@
+---
+title: init() function
+description: Default export of @taucad/opencascade.js — signature, options, and singleton pattern.
+---
+
+`init` is the default export of `@taucad/opencascade.js`. It instantiates the
+WASM module and returns a Promise resolving to the bound OCCT runtime.
+
+```typescript
+import init from '@taucad/opencascade.js';
+import wasmUrl from '@taucad/opencascade.js/wasm?url';
+
+const oc = await init({ locateFile: () => wasmUrl });
+```
+
+The `@taucad/opencascade.js/wasm` subpath export resolves to the shipped
+`opencascade_full.wasm`. The multi-threaded variant uses the same `init`
+signature from `@taucad/opencascade.js/multi` with wasm at
+`@taucad/opencascade.js/multi/wasm`. See [Bundler & locateFile](../../guides/bundler-locatefile)
+for Vite, Next.js, Bun, Node, and Deno-specific recipes (including the MT variant).
+
+## Options
+
+
+
+## Memoised singleton pattern
+
+`init` is expensive — wasm instantiation, runtime bootstrap, and class
+registration sum to ~200 ms warm / ~2 s cold. Always memoise the Promise.
+
+```typescript
+let ocPromise: ReturnType | undefined;
+export const getOc = () => (ocPromise ??= init({ locateFile: () => wasmUrl }));
+```
+
+Calling `getOc()` from multiple call sites returns the same Promise; only the
+first call triggers init.
+
+## Return type
+
+The resolved value is the bound OCCT module — a plain object whose properties
+are the bound classes and namespaces (`oc.BRepPrimAPI_MakeBox`,
+`oc.TopoDS`, `oc.Interface_Static`) plus emscripten runtime
+methods (`oc.FS`, `oc.HEAP8`, `oc.HEAPF32`).
+
+The full surface is documented under the [API Reference](/docs/package/api).
+
+## Multi-threaded subpath
+
+Import `@taucad/opencascade.js/multi` with wasm at `@taucad/opencascade.js/multi/wasm`. The `init` signature is identical; Emscripten pre-spawns pthread workers during instantiation (`PTHREAD_POOL_SIZE=navigator.hardwareConcurrency` is baked into the binary). No extra JS worker wiring is required beyond `locateFile`.
+
+After `await init(...)`, run this **once** before any parallel-aware OCCT call:
+
+```typescript
+oc.BOPAlgo_Options.SetParallelMode(true);
+oc.BRepMesh_IncrementalMesh.SetParallelDefault(true);
+const pool = oc.OSD_ThreadPool.DefaultPool(-1);
+pool.SetNbDefaultThreadsToLaunch(pool.NbThreads());
+```
+
+Skipping the pool sizing leaves OCCT's lazy default pool smaller than the pre-spawned worker count and caps speedup on mesh/boolean workloads. See [Multi-threaded build](../../guides/multi-threading#global-activation--call-once-at-startup) for the full activation walkthrough and [BENCHMARKS.md](https://github.com/taucad/opencascade.js/blob/main/BENCHMARKS.md) for ST vs MT numbers.
diff --git a/docs-site/content/docs/package/reference/ocjs-package-api/meta.json b/docs-site/content/docs/package/reference/ocjs-package-api/meta.json
new file mode 100644
index 00000000..3666d228
--- /dev/null
+++ b/docs-site/content/docs/package/reference/ocjs-package-api/meta.json
@@ -0,0 +1,8 @@
+{
+ "title": "OCJS package API",
+ "pages": [
+ "init-function",
+ "module-shape",
+ "exception-classes"
+ ]
+}
diff --git a/docs-site/content/docs/package/reference/ocjs-package-api/module-shape.mdx b/docs-site/content/docs/package/reference/ocjs-package-api/module-shape.mdx
new file mode 100644
index 00000000..3ab18712
--- /dev/null
+++ b/docs-site/content/docs/package/reference/ocjs-package-api/module-shape.mdx
@@ -0,0 +1,74 @@
+---
+title: Module shape
+description: Top-level fields exposed on the resolved OCCT module — namespaces, runtime helpers, FS.
+---
+
+The object returned from `init()` carries every bound class plus emscripten
+runtime helpers.
+
+## Bound classes and namespaces
+
+Direct properties named after OCCT classes:
+
+```typescript
+const oc = await init({ locateFile });
+const box = new oc.BRepPrimAPI_MakeBox(10, 10, 10);
+const point = new oc.gp_Pnt(0, 0, 0);
+```
+
+OCCT namespaces (e.g. `TopoDS`, `Interface_Static`, `XCAFDoc_DocumentTool`)
+appear as static-method-only objects:
+
+```typescript
+oc.Interface_Static.SetIVal('write.step.schema', 5);
+const edge = oc.TopoDS.Edge(genericShape);
+const shapeTool = oc.XCAFDoc_DocumentTool.ShapeTool(doc.Main()).get();
+```
+
+## Filesystem (`oc.FS`)
+
+The emscripten MEMFS bridge. Used to write OCCT output (`STEP`, `GLB`, `IGES`)
+to an in-memory path, then read the bytes out.
+
+```typescript
+const path = `/out_${Date.now()}.step`;
+writer.Write(path);
+const bytes = oc.FS.readFile(path) as Uint8Array;
+oc.FS.unlink(path);
+```
+
+| Method | Purpose |
+|---|---|
+| `FS.readFile(path)` | Returns bytes as `Uint8Array` (view into wasm memory — copy out before `unlink`) |
+| `FS.writeFile(path, bytes)` | Write input file (e.g. for `STEPControl_Reader.ReadFile`) |
+| `FS.unlink(path)` | Free the MEMFS path |
+| `FS.mkdir(path)` | Create directory (rare — OCCT writes to `/` by default) |
+| `FS.readdir(path)` | List directory contents |
+
+Full FS API: [emscripten FS reference](https://emscripten.org/docs/api_reference/Filesystem-API.html).
+
+## Heap views
+
+| Property | Type |
+|---|---|
+| `oc.HEAP8` | `Int8Array` view of wasm memory |
+| `oc.HEAPU8` | `Uint8Array` |
+| `oc.HEAP16`, `HEAPU16` | 16-bit views |
+| `oc.HEAP32`, `HEAPU32` | 32-bit views |
+| `oc.HEAPF32`, `HEAPF64` | Float views |
+
+Use for advanced interop (e.g. reading bytes at a `Standard_Address` pointer
+returned from a low-level OCCT API). Most consumers never need these.
+
+## Exception helpers
+
+```typescript
+import init, { getExceptionMessage } from '@taucad/opencascade.js';
+// see /docs/package/guides/debugging-wasm-exceptions
+```
+
+## Module re-init
+
+Calling `init()` a second time **re-instantiates** the wasm module —
+expensive, and creates two parallel C++ heaps that don't share state. Always
+memoise behind a singleton; see [init function](./init-function).
diff --git a/docs-site/content/docs/package/reference/ocjs-package-api/types.ts b/docs-site/content/docs/package/reference/ocjs-package-api/types.ts
new file mode 100644
index 00000000..077b1a92
--- /dev/null
+++ b/docs-site/content/docs/package/reference/ocjs-package-api/types.ts
@@ -0,0 +1,72 @@
+/**
+ * Options accepted by `init()` from `@taucad/opencascade.js`.
+ *
+ * Passed straight through to emscripten's `Module` factory.
+ */
+export type InitOpenCascadeOptions = {
+ /**
+ * Resolve the URL where the runtime will fetch a sibling asset (most
+ * importantly `opencascade_full.wasm`). Mandatory for the V3 single-file
+ * build — the runtime no longer auto-discovers its wasm sibling.
+ *
+ * The canonical pattern is to point at the `@taucad/opencascade.js/wasm`
+ * subpath export and return its URL verbatim.
+ *
+ * @example `() => wasmUrl // import wasmUrl from '@taucad/opencascade.js/wasm?url'`
+ */
+ locateFile: (file: string) => string;
+
+ /**
+ * Override the wasm binary bytes directly. Use this when you've fetched
+ * the wasm via a custom transport (e.g. an OPFS cache) and want to skip
+ * the runtime's own `fetch(locateFile(...))`.
+ *
+ * @default undefined
+ */
+ wasmBinary?: ArrayBuffer | Uint8Array;
+
+ /**
+ * Pre-allocated memory for the wasm instance. Most consumers leave this
+ * unset and let `ALLOW_MEMORY_GROWTH` size the heap on demand.
+ *
+ * @default undefined
+ */
+ wasmMemory?: WebAssembly.Memory;
+
+ /**
+ * Print stdout (e.g. `printf` from custom C++) to a sink.
+ *
+ * @default console.log
+ */
+ print?: (text: string) => void;
+
+ /**
+ * Print stderr (e.g. OCCT diagnostic messages) to a sink.
+ *
+ * @default console.error
+ */
+ printErr?: (text: string) => void;
+};
+
+/**
+ * The resolved value of `init()`. Carries every bound OCCT class plus the
+ * emscripten runtime helpers (`FS`, `HEAP*`).
+ *
+ * The full bound-class surface is documented under `/docs/package/api`.
+ */
+export type Module = {
+ /** Emscripten in-memory filesystem (MEMFS) bridge. */
+ readonly FS: {
+ readFile: (path: string) => Uint8Array;
+ writeFile: (path: string, bytes: Uint8Array | string) => void;
+ unlink: (path: string) => void;
+ mkdir: (path: string) => void;
+ readdir: (path: string) => string[];
+ };
+
+ /** 8-bit signed view of wasm linear memory. */
+ readonly HEAP8: Int8Array;
+
+ /** 32-bit float view of wasm linear memory. */
+ readonly HEAPF32: Float32Array;
+};
diff --git a/docs-site/content/docs/toolchain/concepts/bindgen-pipeline.mdx b/docs-site/content/docs/toolchain/concepts/bindgen-pipeline.mdx
new file mode 100644
index 00000000..32bf1bdb
--- /dev/null
+++ b/docs-site/content/docs/toolchain/concepts/bindgen-pipeline.mdx
@@ -0,0 +1,126 @@
+---
+title: Bindgen pipeline
+description: How libclang → embind → wasm-ld combine to produce the bound TypeScript surface.
+---
+
+
+ **Maintainer track.** Read this if you rebuild OCJS from source or extend it
+ with custom C++. If you `pnpm add opencascade.js` and call the published
+ wasm from JS, you can skip this page — the consumer-facing rules live in
+ [Calling OCCT from JS](./calling-occt-from-js) and
+ [Return shapes](./return-shapes).
+
+
+The OCJS bindings generator is a Python orchestrator over libclang and
+emscripten's embind. This page maps the stages and the artifacts they emit.
+
+## Stage diagram
+
+ A2[libclang AST walk]
+ A2 --> A3[bindings.py / generateBindings.py]
+ A3 --> A4["build/bindings////.hxx"]
+ A3 --> A5["build/bindings////.d.ts.json"]
+ end
+ subgraph "Stage 2 — compile (em++)"
+ A4 --> B1[em++ -c per class]
+ B1 --> B2["build/bindings/.../.o (cached)"]
+ end
+ subgraph "Stage 3 — link (wasm-ld)"
+ B2 --> C1[wasm-ld + emcc glue]
+ C1 --> C2[dist/opencascade_full.wasm]
+ C1 --> C3[dist/opencascade_full.js]
+ A5 --> C4[dist/opencascade_full.d.ts]
+ end
+`} />
+
+## Stage 1 — bindgen
+
+`scripts/build-wasm.sh bindings` invokes the Python bindgen which:
+
+1. Walks every header listed in the active YAML via libclang.
+2. Builds an AST per class, applies the `bindgen-filters.yaml` exclusions, and
+ classifies each member as constructor / static method / instance method /
+ property.
+3. Resolves typedefs (including the OCCT `occ::handle<>` family) against a
+ shared cache.
+4. Emits one `.hxx` per class with `EMSCRIPTEN_BINDINGS(...)` registrations and
+ one `.d.ts.json` shard per class describing the TypeScript shape.
+
+The bindgen is deterministic: same headers + same filter YAML = identical
+output bytes.
+
+## Stage 2 — compile
+
+`em++` compiles each `.hxx` to a `.o`. The cache key is the `.hxx` content
+hash plus the compile-time flag fingerprint. Cached `.o` files survive across
+consumer builds — that's the speedup that makes a custom-trimmed build take
+60 seconds instead of 30 minutes.
+
+## Stage 3 — link
+
+`emcc` links the selected `.o` files (per the consumer YAML's `bindings:`
+list) against the pre-compiled OCCT library archives in `dist/libs/`. The
+output:
+
+- `.wasm` — the wasm binary.
+- `.js` — the emscripten loader glue.
+- `.d.ts` — the merged TypeScript declarations (from `.d.ts.json` shards
+ filtered to the bound symbol set).
+- `.build-manifest.json` — symbol coverage report (requested vs compiled,
+ wasm bytes, validation flags).
+
+## How custom C++ enters the pipeline
+
+`additionalCppCode` + `additionalCppFiles` get concatenated into one TU which
+flows through a smaller variant of stages 1+2 — bindgen discovers Handle/NCollection
+references, em++ compiles, the result links into the final wasm alongside the
+auto-generated bindings.
+
+`additionalBindCode` skips bindgen entirely — it's a literal `.cpp` snippet
+that gets compiled with `` already included.
+
+## When the pipeline fails
+
+| Symptom | Stage | Fix |
+|---|---|---|
+| `libclang: cannot find ` | 1 | OCCT headers not mounted into the Docker image |
+| `undefined symbol: _ZN10TopoDS_...` | 3 | Remove a `bindings:` entry whose `.o` no longer exists, or the class transitively needs another class you trimmed |
+| `BindingError: invalid type` at runtime | 3 | Duplicate `EMSCRIPTEN_BINDINGS()` group across `additionalBindCode` and a generated `.hxx` |
+| Codegen emits `any` for a known type | 1 | The link step always prints a triage summary to stderr when this happens. The build still proceeds by default; set `OCJS_STRICT_TYPES=1` in CI to fail the build instead of shipping a poisoned `.d.ts`. File an issue with the printed triage summary. |
+| Codegen emits `unknown` / surfaces an unbound reference | 1 | Same gate as above. Warning printed by default; `OCJS_STRICT_TYPES=1` escalates to a hard failure for CI consumers. |
+
+## What the pipeline produces — JS-side contract
+
+The artifacts above are an implementation detail. The contract those artifacts
+expose to JS consumers — overload-dispatched calls, in-place class outputs,
+`returnValue` envelopes, Handle elision — lives in two consumer-facing
+concept pages:
+
+- [Calling OCCT from JS](./calling-occt-from-js) — overload dispatch, enums,
+ defaults, and the `TopoDS` downcast bridge.
+- [Return shapes](./return-shapes) — class outputs, envelopes, `returnValue`,
+ and Handle elision.
+
+## Docker stage mapping
+
+The pipeline stages map directly to the published Docker stages described in
+[Docker image](../reference/docker-image#image-stages):
+
+| Pipeline stage | Docker stage | Published tag |
+| ---------------------- | ------------------------- | -------------------- |
+| 1 — discover | `bindgen-base` | `:bindgen-base` |
+| 2 — emit (TUs + .d.ts) | `bindgen-base` | `:bindgen-base` |
+| 3 — compile + link | `compiled-{threading}` + `final-{threading}` | `:single-threaded`, `:multi-threaded` |
+
+`:bindgen-base` is both a build stage and a published image — it carries the
+patched OCCT tree, the PCH, and the `.d.ts.json` index but not the
+pre-compiled `.o` files. Custom-bindings consumers pull `:bindgen-base`,
+re-run `generate` against their own YAML, and compile from there.
+
+## Related
+
+- [Extend with C++](../guides/extend-with-cpp) — how to inject custom C++ into the pipeline.
+- [Trim symbols](../guides/trim-symbols) — controlling which classes survive into stage 3.
+- [YAML schema](../reference/yaml-schema) — every YAML key the pipeline consumes.
diff --git a/docs-site/content/docs/toolchain/concepts/two-channel-config-model.mdx b/docs-site/content/docs/toolchain/concepts/two-channel-config-model.mdx
new file mode 100644
index 00000000..42282b5f
--- /dev/null
+++ b/docs-site/content/docs/toolchain/concepts/two-channel-config-model.mdx
@@ -0,0 +1,107 @@
+---
+title: Two-channel config model
+description: Compile-time OCJS_* env vars vs link-time emccFlags — what each channel controls and when to reach for it.
+---
+
+
+ **Maintainer track.** Skip this page if you consume the published npm
+ package — every shipped build already pins the right channel-1 flags. The
+ channels matter when you rebuild OCJS from source.
+
+
+OpenCascade.js exposes two configuration channels with different lifecycles and
+different scope. Treat them as orthogonal — confusion between the two is the
+most common cause of build errors.
+
+## Channel 1 — compile-time `OCJS_*` env vars
+
+Set at the **bindgen + C++ compile** stage. Bake into every `.o` file the
+final wasm is linked from.
+
+| Variable | Effect |
+|---|---|
+| `OCJS_EXCEPTIONS=1` | Compile with `-fwasm-exceptions` everywhere |
+| `OCJS_SIMD=1` | Compile with `-msimd128` |
+| `OCJS_RELAXED_SIMD=1` | Additionally emit `-mrelaxed-simd` (Chrome/Firefox only) |
+| `OCJS_BIGINT=1` | Compile with `-sWASM_BIGINT` |
+| `OCJS_EVAL_CTORS_LEVEL=2` | `-sEVAL_CTORS=2` |
+| `OCJS_STRICT_TYPES=1` | Escalate missing-typedef warning to a build failure (default `0`: warn-only — the triage summary is always printed to stderr) |
+
+[^lto]: `OCJS_LTO` exists but is intentionally off in every shipped preset.
+ The workspace benchmarks showed LTO increasing the wasm size for OCJS's
+ object distribution, so it stays disabled. Flip it on locally only if
+ you're benchmarking a specific bindings trim.
+
+These flags pin into a **build-flags manifest** alongside each cached `.o`.
+Mixing builds with mismatched flags fails-loud at link time — never silent
+ABI breakage.
+
+## Channel 2 — link-time `emccFlags`
+
+Set per-consumer-build in your YAML. Apply only to the final `emcc` link step.
+
+```yaml
+mainBuild:
+ emccFlags:
+ - -O3
+ - -sMODULARIZE=1
+ - -sEXPORT_ES6=1
+ - -sALLOW_MEMORY_GROWTH=1
+```
+
+These flags control loader shape (ESM vs CommonJS), memory limits, and
+environment detection. They cannot retroactively change the exception model
+or SIMD configuration the `.o` files were compiled with.
+
+## Why the split?
+
+The bindgen produces ~4,400 `.o` files in the maintainer Docker pipeline. Caching
+them across consumer builds turns a 30-minute full build into a 60-second link.
+The cache key must be deterministic — that's what the compile-time channel
+fingerprint guards.
+
+If consumers could change compile-time flags via YAML, the cache invariant
+would break: a downstream `-fexceptions` request would silently rebuild every
+class, defeating the cache. Splitting the channels makes the contract
+explicit.
+
+## When you actually need to change channel 1
+
+Almost never as a consumer. The published build is the named
+`single-threaded` preset from `build-configs/configurations.json`, which pins:
+
+- `OCJS_EXCEPTIONS=1` + `OCJS_EH_MODE=wasm` (native wasm exceptions)
+- `OCJS_SIMD=1` (baseline SIMD, Safari-compatible)
+- `OCJS_BIGINT=1` (no i64 legalisation)
+- `OCJS_EVAL_CTORS=true` + `OCJS_EVAL_CTORS_LEVEL=2`
+- `OCJS_CLOSURE=true` + `OCJS_CONVERGE=true`
+- `THREADING=single-threaded`
+
+Presets are addressed by name, not by raw env vars — see
+[Named compile-time configurations](../reference/configurations) for the full
+list (`single-threaded`, `single-threaded-smallest`, `multi-threaded`,
+`debug`).
+
+The combinations not yet pre-built are exotic — `OCJS_RELAXED_SIMD=1` for
+Chrome-only deploys, custom allocator pairings, non-default WASM-opt budgets.
+To get one, fork the Docker image build pipeline and rebuild from source.
+
+## Diagnostic checklist
+
+If a build acts strangely:
+
+1. Confirm channel-1 fingerprint is what you expect. The full flag set is
+ recorded in the in-repo build manifest (regenerated by every `bindings`
+ stage):
+ ```bash
+ cat build/build-flags.json
+ ```
+ For the **published** tarball, the consumer-facing equivalent is
+ `dist/opencascade_full.provenance.json`, which captures the active preset,
+ compile flags, and commit SHA the wasm was built from.
+2. Confirm channel-2 flags in the YAML actually made it into the wasm:
+ ```bash
+ strings dist/my-build.wasm | grep -E 'STACK_SIZE|MAXIMUM_MEMORY'
+ ```
+3. Recompare against a known-good cached build — drift here points at
+ channel-1 cache poisoning (rebuild the deps layer).
diff --git a/docs-site/content/docs/toolchain/getting-started/quick-start-docker.mdx b/docs-site/content/docs/toolchain/getting-started/quick-start-docker.mdx
new file mode 100644
index 00000000..be882002
--- /dev/null
+++ b/docs-site/content/docs/toolchain/getting-started/quick-start-docker.mdx
@@ -0,0 +1,162 @@
+---
+title: Quickstart — Docker
+description: Pull the prebuilt GHCR image, link a custom YAML, and build a trimmed OCCT wasm in under 5 minutes.
+---
+
+For when you need a custom-trimmed `opencascade.wasm` without setting up emsdk,
+libclang, and Python locally.
+
+## 1. Pull the image
+
+
+
+```bash
+docker pull ghcr.io/taucad/opencascade.js:single-threaded
+```
+
+The `:single-threaded` tag carries pre-compiled OCCT static libraries so your
+build only pays for the link step. For threaded builds (requires COOP/COEP on
+consumer pages), pull `:multi-threaded` instead. For custom-bindings work
+that needs the pre-PCH/generate state but not the pre-compiled libraries, see
+`:bindgen-base` in [Reference → Docker image](../reference/docker-image).
+
+### Supported platforms
+
+Release tags (`:single-threaded`, `:multi-threaded`, `:bindgen-base`,
+versioned variants) ship as **multi-architecture manifest lists** —
+`linux/amd64` and `linux/arm64` — so Apple Silicon and ARM Linux hosts pull
+the native arch automatically. No `--platform` flag required.
+
+Branch tags (`:branch-`, `:multi-threaded-branch-`,
+`:bindgen-base-branch-`) are **`linux/amd64` only** by design — branch
+publishes need to be fast for reviewers, and the per-arch image build cost
+is the dominant factor. ARM hosts pulling a branch tag will run under
+Rosetta / QEMU. Use a release tag whenever native performance matters.
+
+## 2. Write a build YAML
+
+Create `mybuild.yml` next to your project — list the OCCT symbols you actually
+use. See [Trim symbols](../guides/trim-symbols) for a worked example and
+[YAML schema](../reference/yaml-schema) for the full schema.
+
+```yaml title="mybuild.yml"
+mainBuild:
+ name: my-occt
+ bindings:
+ - symbol: package
+ glob: 'gp'
+ - symbol: package
+ glob: 'BRepPrim*'
+ - symbol: package
+ glob: 'BRepAlgoAPI'
+ - symbol: package
+ glob: 'BRepBuilderAPI'
+ - symbol: package
+ glob: 'BRepFilletAPI'
+ - symbol: package
+ glob: 'TopoDS'
+ - symbol: package
+ glob: 'TopExp'
+ - symbol: package
+ glob: 'STEPControl'
+ - symbol: package
+ glob: 'RWGltf*'
+ emccFlags:
+ - -O3
+ - -fwasm-exceptions
+ - -sMODULARIZE=1
+ - -sEXPORT_ES6=1
+ - -sEXPORT_NAME=initOpenCascade
+```
+
+## 3. Run the image
+
+```bash
+docker run --rm \
+ -v "$(pwd):/src" \
+ -u "$(id -u):$(id -g)" \
+ ghcr.io/taucad/opencascade.js:single-threaded \
+ link mybuild.yml
+```
+
+`link` is the end-to-end command. Inside the container Nx's `dependsOn`
+graph walks every upstream step (apply-patches → pch → generate →
+compile-bindings → compile-sources → link) with cache reuse, so a fresh
+container performs a full build and cached re-runs replay only the link
+step.
+
+Output lands next to `mybuild.yml`:
+
+- `my-occt.wasm` — the trimmed wasm binary
+- `my-occt.js` — the emscripten loader
+- `my-occt.d.ts` — generated TypeScript declarations
+- `my-occt.build-manifest.json` — symbol coverage and size report
+
+## 4. Wire the build output
+
+```typescript
+import init from './my-occt.js';
+import wasmUrl from './my-occt.wasm?url';
+
+const oc = await init({ locateFile: () => wasmUrl });
+```
+
+## 5. Pin by manifest-list digest in production
+
+Tags can be re-pointed; digests cannot. Resolve the manifest-list digest
+once and pin it in CI so every reproducer of your build pulls the exact
+same multi-arch image set:
+
+```bash
+docker buildx imagetools inspect ghcr.io/taucad/opencascade.js:single-threaded \
+ --format '{{json .Manifest.Digest}}'
+# → "sha256:abc123…"
+
+# Pin in CI / docker-compose / Dockerfile:
+ghcr.io/taucad/opencascade.js@sha256:abc123…
+```
+
+The manifest-list digest covers both `linux/amd64` and `linux/arm64`
+sub-images — pulling by digest from any arch resolves to the same
+deterministic build.
+
+See [Reproducible CI](../guides/reproducible-ci) for the full workflow.
+
+## 6. Verify the supply-chain signature (optional)
+
+Every published image is signed with [cosign](https://github.com/sigstore/cosign)
+via OIDC keyless signing — no rotating private keys, signatures published to
+the Sigstore Rekor transparency log. To verify before pulling:
+
+```bash
+cosign verify ghcr.io/taucad/opencascade.js:single-threaded \
+ --certificate-identity-regexp 'https://github.com/taucad/opencascade\.js/\.github/workflows/docker\.yml@.*' \
+ --certificate-oidc-issuer https://token.actions.githubusercontent.com
+```
+
+A successful verification confirms the image was built by the
+`taucad/opencascade.js` GitHub Actions workflow and has not been tampered
+with since publication.
+
+## Where the time goes
+
+Typical wall-clock for a 22-50 symbol trim on the GitHub Actions `ubuntu-latest`
+runner (the e2e gate budget; M1 Pro local times are 30-50% faster):
+
+| Step | Warm cache | Cold cache |
+| -------------------------------------- | -----------: | -----------: |
+| Image pull (compressed ~1.3 GB) | 0 s | 30-60 s |
+| `generate` against your YAML | 5-15 s | 5-15 s |
+| `compile-bindings` (cached `.o` files) | 0 s | 1-3 min |
+| `compile-sources` (cached OCCT `.a`) | 0 s | 5-10 min |
+| Link against precompiled OCCT objects | 30-90 s | 30-90 s |
+| **Total** | **~1-2 min** | **~3-5 min** |
+
+The CI e2e gate budgets a hard 5-minute warm-link ceiling and tags get
+published only if both `:single-threaded` and `:multi-threaded` clear that
+budget on both architectures. Cold-cache runs (first pull on a new machine)
+add the image pull time; subsequent runs on the same machine reuse the
+pulled image and Nx cache.
+
+Full surface builds (no symbol filter, i.e. `build-configs/full.yml`) take
+25-40 minutes — they're for the maintainer pipeline, not consumer machines.
diff --git a/docs-site/content/docs/toolchain/guides/custom-emcc-flags.mdx b/docs-site/content/docs/toolchain/guides/custom-emcc-flags.mdx
new file mode 100644
index 00000000..b5537ec3
--- /dev/null
+++ b/docs-site/content/docs/toolchain/guides/custom-emcc-flags.mdx
@@ -0,0 +1,73 @@
+---
+title: Custom emcc flags
+description: Link-time emscripten flags — SIMD, exceptions, BigInt, EVAL_CTORS, optimisation level, environment.
+---
+
+Once your YAML symbol list is right, the second knob is `emccFlags`. Use it to
+tune optimisation level, exception model, SIMD, and target environments.
+
+## Recommended baseline
+
+```yaml
+mainBuild:
+ emccFlags:
+ - -O3
+ - -fwasm-exceptions # native wasm exceptions; faster than JS exceptions
+ - -msimd128 # baseline SIMD (Safari + everyone else)
+ - -sWASM_BIGINT # i64 stays as BigInt, no legalisation glue
+ - -sEVAL_CTORS=2 # static-init evaluation at build time
+ - -sMODULARIZE=1 # init() returns Promise
+ - -sEXPORT_ES6=1 # ESM output
+ - -sENVIRONMENT=web,worker,node
+ - -sALLOW_MEMORY_GROWTH=1
+ - -sMAXIMUM_MEMORY=4GB # wasm32 ceiling
+```
+
+## Flag-by-flag rationale
+
+| Flag | Why |
+|---|---|
+| `-O3` | Full LLVM optimisation. `-Os` is ~5% smaller, ~10% slower at runtime. `-O0` for debugging only. |
+| `-fwasm-exceptions` | Uses Wasm `try_table`. ~5–10% smaller and faster than `-fexceptions` (JS-based) when supported (every modern engine). |
+| `-msimd128` | Baseline SIMD. ~15% perf win on mesh and boolean kernels. Safari-compatible. |
+| `-mrelaxed-simd` | Chrome/Firefox-only additional SIMD ops. Adds another ~5% perf but breaks Safari — only ship if you can fall back. |
+| `-sWASM_BIGINT` | Removes the i64↔i32-pair shim. Saves ~30 KB JS glue. |
+| `-sEVAL_CTORS=2` | Runs static initialisers at build time. Smaller payload + faster startup. |
+| `-sMODULARIZE=1 -sEXPORT_ES6=1` | Required for `import init from '...'`. |
+| `-sENVIRONMENT=web,worker,node` | Strips dead env detection. Without this the runtime probes for `process`/`window`/`importScripts`. |
+| `-sALLOW_MEMORY_GROWTH=1` | Required for any non-trivial geometry — initial 16 MB heap is not enough. |
+| `-sMAXIMUM_MEMORY=4GB` | wasm32 hard ceiling (2³² bytes). |
+
+## Trade-offs
+
+### Wasm exceptions vs JS exceptions
+
+`-fwasm-exceptions` requires that **all** `.o` files AND the linker use the flag
+consistently. Mixed builds produce `__cpp_exception` as an unresolved import at
+link time. The default OCJS build sets `OCJS_EXCEPTIONS=1` everywhere; only
+override if you have a very narrow constraint (e.g. a wasm engine without
+`try_table` support).
+
+### SIMD: baseline vs relaxed
+
+Browsers diverged. Baseline `-msimd128` is universal. Relaxed-SIMD
+(`-mrelaxed-simd`) is Chrome + Firefox at the time of writing — Safari (as of
+26.x) refuses to parse the relaxed opcodes and the wasm module fails to
+instantiate. Ship relaxed-SIMD only if you maintain a fallback baseline build.
+
+### EVAL_CTORS levels
+
+| Level | Behaviour |
+|---|---|
+| 0 | Off — every static init runs at startup |
+| 1 | Eval ctors with safe side effects |
+| 2 | Recommended — full ctor evaluation, requires `-O2`+ |
+
+`EVAL_CTORS=2` is the OCJS shipped default and the right answer almost always.
+
+## What you can NOT change at link time
+
+The wasm bitwidth (`wasm32` vs `wasm64`), the C++ stdlib version, the OCCT
+commit pin, and the libclang version are all baked in during the bindgen
+pipeline that produces the published Docker image. Customise via a fork of the
+Docker image if you need any of those.
diff --git a/docs-site/content/docs/toolchain/guides/derive-cpp-class-in-js.mdx b/docs-site/content/docs/toolchain/guides/derive-cpp-class-in-js.mdx
new file mode 100644
index 00000000..4fbef73d
--- /dev/null
+++ b/docs-site/content/docs/toolchain/guides/derive-cpp-class-in-js.mdx
@@ -0,0 +1,125 @@
+---
+title: Derive a C++ class in JavaScript
+description: Override Message_ProgressIndicator virtual methods from JavaScript via allow_subclass and EMSCRIPTEN_WRAPPER.
+---
+
+OpenCascade reports progress and supports user-initiated cancellation through
+`Message_ProgressIndicator`. Because OCCT requires a **derived class** with
+overridden virtual methods, using progress callbacks in OpenCascade.js requires
+a **custom WASM build** that exposes `allow_subclass<>` bindings.
+
+This guide consolidates the legacy three-page `progress-indicators-user-break`
+series into a single V3 tutorial.
+
+## Overview
+
+1. Add a C++ bridge struct and `EMSCRIPTEN_WRAPPER` in your custom build YAML.
+2. Register `allow_subclass<>` in `additionalBindCode`.
+3. Derive the class in JavaScript with `.extend()` and pass `Start()` into
+ long-running algorithms like `BRepAlgoAPI_Fuse`.
+
+Three methods matter:
+
+| Method | Required | Purpose |
+| ------------ | -------- | ---------------------------------------------------- |
+| `Show` | Yes | Called on every progress update (pure virtual in OCCT) |
+| `UserBreak` | Optional | Return `true` to cancel the current operation |
+| `Reset` | Optional | Called when a new long-running process starts |
+
+## Step 1 — Custom build bindings
+
+Create `wrappers/progress-indicator-js.cpp`:
+
+```cpp title="wrappers/progress-indicator-js.cpp"
+#include
+#include
+#include
+
+using namespace emscripten;
+
+struct Message_ProgressIndicator_JS : public Message_ProgressIndicator {
+ using Message_ProgressIndicator::Show;
+ using Message_ProgressIndicator::UserBreak;
+ using Message_ProgressIndicator::Reset;
+};
+
+struct Message_ProgressIndicator_JSWrapper : public wrapper {
+ EMSCRIPTEN_WRAPPER(Message_ProgressIndicator_JSWrapper);
+ void Show(const Message_ProgressScope& theScope, const Standard_Boolean isForce) {
+ val valTheScope = val::object();
+ valTheScope.set("current", &theScope);
+ return call("Show", valTheScope, isForce);
+ }
+ Standard_Boolean UserBreak() { return call("UserBreak"); }
+ void Reset() { return call("Reset"); }
+};
+```
+
+Add to your build YAML:
+
+```yaml title="build-configs/with-progress-callback.yml"
+additionalCppFiles:
+ - wrappers/progress-indicator-js.cpp
+mainBuild:
+ bindings:
+ - symbol: Message_ProgressIndicator
+ - symbol: Message_ProgressScope
+ - symbol: Message_ProgressRange
+ - symbol: BRepAlgoAPI_Fuse
+ - symbol: BRepPrimAPI_MakeBox
+ - symbol: gp_Pnt
+ additionalBindCode: |
+ EMSCRIPTEN_BINDINGS(progress_indicator_js) {
+ class_>(
+ "Message_ProgressIndicator_JS")
+ .function("Show", &Message_ProgressIndicator_JS::Show, pure_virtual())
+ .function("UserBreak", optional_override([](Message_ProgressIndicator_JS& self) {
+ return self.Message_ProgressIndicator_JS::UserBreak();
+ }))
+ .function("Reset", optional_override([](Message_ProgressIndicator_JS& self) {
+ return self.Message_ProgressIndicator_JS::Reset();
+ }))
+ .allow_subclass("Message_ProgressIndicator_JSWrapper");
+ }
+```
+
+Build with the [Toolchain quickstart](../getting-started/quick-start-docker).
+
+## Step 2 — Derive in JavaScript
+
+```typescript title="examples/progress-indicator.ts"
+import { getOc } from './ocjs-init';
+
+let shouldCancel = false;
+
+export const runFuseWithProgress = async (): Promise => {
+ const oc = await getOc();
+
+ const MyProgress = oc.Message_ProgressIndicator_JS.extend('Message_ProgressIndicator_JS', {
+ Show(_scope, _isForce) {
+ console.log('progress', this.GetPosition());
+ },
+ UserBreak() {
+ return shouldCancel;
+ },
+ });
+
+ using p = new MyProgress();
+ using box1 = new oc.BRepPrimAPI_MakeBox(new oc.gp_Pnt(0, 0, 0), 2, 1, 1);
+ using box2 = new oc.BRepPrimAPI_MakeBox(new oc.gp_Pnt(1, 0, 0), 2, 1, 1);
+ using fuse = new oc.BRepAlgoAPI_Fuse(box1.Shape(), box2.Shape(), p.Start());
+ fuse.Build(new oc.Message_ProgressRange());
+};
+```
+
+V3 uses suffix-free `Start()` — the v2 `_1` / `_2` overload suffixes no longer
+exist. Overload dispatch happens in C++ via the unified RBV pipeline.
+
+## Step 3 — Cancellation
+
+Set `shouldCancel = true` from a UI button or timeout. The next `UserBreak()`
+call returns `true` and OCCT aborts the in-flight operation.
+
+See also: [Extend with C++](./extend-with-cpp) for the general custom-build
+mechanics, and [Debugging WASM exceptions](../../package/guides/debugging-wasm-exceptions)
+if the derived class throws across the wasm boundary.
diff --git a/docs-site/content/docs/toolchain/guides/extend-with-cpp.mdx b/docs-site/content/docs/toolchain/guides/extend-with-cpp.mdx
new file mode 100644
index 00000000..5709f112
--- /dev/null
+++ b/docs-site/content/docs/toolchain/guides/extend-with-cpp.mdx
@@ -0,0 +1,146 @@
+---
+title: Extend with C++
+description: Decision tree across additionalCppCode, additionalCppFiles, and additionalBindCode mechanisms.
+---
+
+OCCT exposes hundreds of free functions, POD structs, and helper utilities the
+bindgen does not (and cannot) reach automatically. When you need one of them —
+or want an ergonomic wrapper around an OCCT API — the YAML config gives you
+three mechanisms:
+
+1. **`additionalCppCode`** — inline C++ embedded directly in the YAML scalar.
+2. **`additionalCppFiles`** — one or more `.cpp` files concatenated onto `additionalCppCode`.
+3. **`mainBuild.additionalBindCode`** — per-build raw `EMSCRIPTEN_BINDINGS(...)` registrations.
+
+## Decision tree
+
+```text
+Are you adding new C++ implementation code (wrapper class, free function, POD)?
+├── YES → Will the impl grow beyond ~100 lines or want syntax highlighting?
+│ ├── YES → additionalCppFiles
+│ └── NO → additionalCppCode (inline)
+└── NO → You are only adding raw embind registrations on existing symbols
+ → mainBuild.additionalBindCode
+```
+
+The three compose. A typical custom binding ships a `.cpp` file
+(`additionalCppFiles`) plus an `EMSCRIPTEN_BINDINGS(...)` block
+(`additionalBindCode`) that registers what the `.cpp` defined.
+
+## Mechanism 1 — `additionalCppCode` (inline)
+
+For short snippets that belong with the YAML for context — handle typedefs, a
+single free function, a small POD.
+
+```yaml
+additionalCppCode: |
+ #include
+ Standard_Real addReals(Standard_Real a, Standard_Real b) { return a + b; }
+
+mainBuild:
+ name: my_build
+ additionalBindCode: |
+ EMSCRIPTEN_BINDINGS(my_build_extras) {
+ emscripten::function("addReals", &addReals);
+ }
+```
+
+Now `oc.addReals(1.5, 2.25)` returns `3.75`.
+
+## Mechanism 2 — `additionalCppFiles` (multi-file)
+
+When the wrapper grows past ~100 lines or you want real `.cpp` files for editor
+support and review, move it to `additionalCppFiles`. The files are concatenated
+onto `additionalCppCode` (in that order) into one translation unit before custom-binding
+generation runs.
+
+```yaml
+additionalCppFiles:
+ - wrappers/fair-curve.cpp
+
+mainBuild:
+ additionalBindCode: |
+ EMSCRIPTEN_BINDINGS(my_build_faircurve) {
+ emscripten::function("computeFairCurve", &computeFairCurve);
+ }
+```
+
+Paths in `additionalCppFiles` are resolved relative to the YAML file's
+directory. A missing file fails-loud at validate time.
+
+## Mechanism 3 — `additionalBindCode` (raw embind)
+
+Use this when bindgen cannot emit the registration you need. Common cases:
+
+- Binding a free function (bindgen registers classes, not free functions).
+- Defining a `value_object` POD authored in `additionalCppCode` / `additionalCppFiles`.
+- Registering an `emscripten::vector` / `emscripten::map` an NCollection
+ auto-discovery pass does not cover.
+
+```yaml
+additionalCppCode: |
+ struct PointXY { double X; double Y; };
+
+mainBuild:
+ additionalBindCode: |
+ EMSCRIPTEN_BINDINGS(my_build_pointxy) {
+ emscripten::value_object("PointXY")
+ .field("X", &PointXY::X)
+ .field("Y", &PointXY::Y);
+ }
+```
+
+Every `EMSCRIPTEN_BINDINGS()` group **must use a unique name** across the
+block and any auto-generated binding TUs — embind enforces uniqueness at module
+load time.
+
+## Worked example — wrapper class with constructor + methods
+
+```cpp title="wrappers/shape-cast.cpp"
+#include
+#include
+#include
+#include
+
+class ShapeCast {
+public:
+ static TopoDS_Edge toEdge(const TopoDS_Shape& s) { return TopoDS::Edge(s); }
+ static TopoDS_Face toFace(const TopoDS_Shape& s) { return TopoDS::Face(s); }
+};
+```
+
+```yaml title="build-configs/my-config.yml"
+additionalCppFiles:
+ - wrappers/shape-cast.cpp
+
+mainBuild:
+ bindings:
+ - symbol: TopoDS_Shape
+ - symbol: TopoDS_Edge
+ - symbol: TopoDS_Face
+ additionalBindCode: |
+ EMSCRIPTEN_BINDINGS(my_build_shape_cast) {
+ emscripten::class_("ShapeCast")
+ .class_function("toEdge", &ShapeCast::toEdge)
+ .class_function("toFace", &ShapeCast::toFace);
+ }
+```
+
+JS:
+
+```typescript
+const edge = oc.ShapeCast.toEdge(genericShape);
+```
+
+## Pitfalls
+
+- **Duplicate `EMSCRIPTEN_BINDINGS` group names** crash the module at load time.
+- **Forgetting to bind the underlying OCCT class** in `bindings:` causes the
+ wrapper to compile but the runtime cast to throw.
+- **Using `Handle` without the typedef** works in C++ but produces no useful
+ JS shape. Add `typedef opencascade::handle Handle_T;`.
+
+## Related
+
+- [YAML schema](../reference/yaml-schema) — schema for every YAML key.
+- [Emscripten embind reference](https://emscripten.org/docs/porting/connecting_cpp_and_javascript/embind.html).
diff --git a/docs-site/content/docs/toolchain/guides/multi-threading.mdx b/docs-site/content/docs/toolchain/guides/multi-threading.mdx
new file mode 100644
index 00000000..685115c1
--- /dev/null
+++ b/docs-site/content/docs/toolchain/guides/multi-threading.mdx
@@ -0,0 +1,128 @@
+---
+title: Custom multi-threaded build
+description: Build a pthread-enabled OCJS WASM with a trimmed symbol list or custom Emscripten flags.
+---
+
+The npm package already ships a pre-built multi-threaded variant at `@taucad/opencascade.js/multi` — see [Package — Multi-threaded build](/docs/package/guides/multi-threading) for the import recipe, COOP/COEP headers, and OCCT activation calls. Rebuild from source only when you need:
+
+- A trimmed symbol list (the shipped MT binary builds from `build-configs/full_multi.yml` with the same ~4,400 symbols as the ST binary).
+- Custom `emccFlags` (alternative `STACK_SIZE`, `INITIAL_MEMORY`, capped `PTHREAD_POOL_SIZE`).
+- A relaxed-SIMD sibling for non-Safari deployments (see the callout below).
+
+## Build YAML
+
+```yaml title="build-configs/threaded.yml"
+mainBuild:
+ name: occt_threaded
+ bindings:
+ # ... your symbol list ...
+ emccFlags:
+ - -O3
+ - -fwasm-exceptions
+ - -msimd128
+ - -pthread
+ - -sUSE_PTHREADS=1
+ # Pre-spawn one worker per logical CPU on the host. The expression is
+ # evaluated by the generated JS glue at module-instantiation time, so a
+ # single binary adapts to whatever hardware loads it.
+ - -sPTHREAD_POOL_SIZE=navigator.hardwareConcurrency
+ - -sSHARED_MEMORY=1
+ - -sMODULARIZE=1
+ - -sEXPORT_ES6=1
+ - -sENVIRONMENT=web,worker,node
+ - -sALLOW_MEMORY_GROWTH=1
+ - -sMAXIMUM_MEMORY=4GB
+```
+
+Build with:
+
+```bash
+./build-wasm.sh --config multi-threaded full build-configs/threaded.yml
+```
+
+`PTHREAD_POOL_SIZE=navigator.hardwareConcurrency` evaluates per-host: an M2
+Pro browser gets 12 workers, a mobile device gets 4–6, a Node server gets
+whatever `os.cpus().length` reports. Each worker costs `STACK_SIZE` (default
+8 MB) at module init, so a 12-core box reserves ~96 MB of stack on top of
+`INITIAL_MEMORY`. If you need a hard cap, wrap the expression:
+`Math.min(navigator.hardwareConcurrency, 16)`.
+
+> ### Why not a small fixed pool size?
+>
+> A round-number pool like `-sPTHREAD_POOL_SIZE=4` is tempting but
+> silently caps your speedup. On a 12-core machine OCCT's
+> `OSD_ThreadPool` requests 11 workers (`NbLogicalProcessors-1`); with a
+> pool of 4 the parallel sections degrade to 4-way fan-out and the
+> headline speedup stalls around 1.3×. Sizing the pool to
+> `navigator.hardwareConcurrency` recovers the full 2.0–2.5× on
+> mesh-dominated workloads, and shrinks gracefully on lower-core devices
+> without a separate build.
+
+> ### Relaxed-SIMD — advanced, non-default
+>
+> Do **not** add `-mrelaxed-simd` to the binary you ship to
+> browsers. Safari / WebKit (all versions as of May 2026) crash the JIT
+> when a relaxed-SIMD opcode actually executes — validation passes but
+> execution does not. If you want the 5–15 % uplift on Chromium /
+> Firefox / Node, build a sibling `occt_threaded_rsimd.wasm` with
+> `-mrelaxed-simd` and `wasm-opt --enable-relaxed-simd`, then UA-sniff in
+> your loader to serve the plain binary to WebKit and the relaxed
+> binary to everyone else.
+
+> ### `EVAL_CTORS=2` is dropped under threading
+>
+> `full.yml` enables `-sEVAL_CTORS=2` for the single-threaded build, but
+> `full_multi.yml` drops it — constructor evaluation order is
+> non-deterministic under pthread workers. The trade-off is a slightly
+> larger binary in exchange for race-free startup.
+>
+> **Companion observation:** the `wasm-opt` post-link pass reports only
+> ~0.1% size reduction on MT builds vs the 4-7% it achieves on ST. That
+> is **not** a regression — `wasm-opt` would normally fold static
+> ctor calls during the same pass `EVAL_CTORS=2` enables; with that
+> flag dropped, the constructors stay live and wasm-opt has less to
+> eliminate. No action required.
+
+## Browser-only MT build
+
+If you can guarantee your consumers run a recent browser (Chrome / Edge ≥ 144, Firefox ≥ 145, Safari ≥ 26.2 — May 2026 baseline) and you do **not** need to load the binary under Node.js, Bun, or Deno, you can opt into the `multi-threaded-browser` preset for a measurable runtime win on memory-growth-heavy workloads.
+
+The preset layers `-sGROWABLE_ARRAYBUFFERS=1` and `-sENVIRONMENT=web,worker` on top of the standard `multi-threaded` flag set. Internally Emscripten emits JS glue that wraps the pthread `SharedArrayBuffer` in a [resizable `ArrayBuffer` view](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/SharedArrayBuffer/grow) via `WebAssembly.Memory.prototype.toResizableBuffer()`. With that view in place, consumers can hoist `HEAP*` references out of hot loops — they no longer go stale after a memory-growth event, so the `-Wpthreads-mem-growth` link-time advisory disappears entirely and per-call HEAP re-fetches drop out of the inner loop.
+
+Build with:
+
+```bash
+./build-wasm.sh --config multi-threaded-browser full build-configs/full_multi_browser.yml
+```
+
+The shipped recipe lives at [`build-configs/full_multi_browser.yml`](https://github.com/taucad/opencascade.js/blob/main/build-configs/full_multi_browser.yml); diff it against [`full_multi.yml`](https://github.com/taucad/opencascade.js/blob/main/build-configs/full_multi.yml) to see the exact two-flag delta.
+
+> ### Runtime support matrix — `toResizableBuffer()` (May 2026)
+>
+> **Supported** — ship `full_multi_browser` artefacts to:
+>
+> - Chrome / Edge ≥ 144
+> - Firefox ≥ 145
+> - Safari ≥ 26.2 (desktop + iOS)
+>
+> **NOT supported** — fall back to plain `full_multi` for:
+>
+> - Node.js (all current LTS) — throws `TypeError: wasmMemory.toResizableBuffer is not a function` on module init.
+> - Bun and Deno (all current versions).
+> - Samsung Internet and other Chromium derivatives that lag mainline.
+>
+> Because Node.js is the dominant test-harness runtime, the **default**
+> shipped multi-threaded build keeps `-sGROWABLE_ARRAYBUFFERS=0` so it
+> stays loadable under `vitest`, `jest`, and other Node-based test runners.
+> Opt into the browser variant only for production payloads you serve
+> directly to browser clients.
+
+## After building
+
+Wire the resulting `.js` / `.wasm` triple into your bundler the same way as the shipped variant — see [Package — Multi-threaded build](/docs/package/guides/multi-threading) for activation calls, parallel-aware OCCT APIs, and benchmarks.
+
+## Related
+
+- [Configurations reference](../reference/configurations) — `multi-threaded` preset and how to author a custom one.
+- [Custom emcc flags](./custom-emcc-flags) — link-time `emccFlags` rationale.
+- [Trim symbols](./trim-symbols) — shrink the symbol set before building.
diff --git a/docs-site/content/docs/toolchain/guides/reproducible-ci.mdx b/docs-site/content/docs/toolchain/guides/reproducible-ci.mdx
new file mode 100644
index 00000000..ba9c530a
--- /dev/null
+++ b/docs-site/content/docs/toolchain/guides/reproducible-ci.mdx
@@ -0,0 +1,141 @@
+---
+title: Reproducible CI
+description: Pin GHCR images by digest, capture provenance and SBOM, lock downstream consumer pins.
+---
+
+A reproducible OCJS build means: same inputs, same wasm bytes, every time.
+Three controls close the loop.
+
+## 1. Pin the image by manifest-list digest
+
+`:single-threaded`, `:multi-threaded`, and `:bindgen-base` are moving tags
+that roll forward with every release. CI should pin by digest so a new
+publish doesn't silently change your wasm output. Pinning the manifest-list
+digest (not the per-arch image digest) covers both `linux/amd64` and
+`linux/arm64` sub-images in a single deterministic pin.
+
+```bash
+# Resolve the manifest-list digest once
+docker buildx imagetools inspect ghcr.io/taucad/opencascade.js:single-threaded \
+ --format '{{json .Manifest.Digest}}'
+# → "sha256:abc123…"
+
+# Use the digest in CI (resolves to the matching native arch transparently)
+docker pull ghcr.io/taucad/opencascade.js@sha256:abc123...
+docker run --rm \
+ -v "$(pwd):/src" \
+ -u "$(id -u):$(id -g)" \
+ ghcr.io/taucad/opencascade.js@sha256:abc123... \
+ link mybuild.yml
+```
+
+## 2. Verify the cosign signature
+
+Every published image is signed via cosign keyless signing (OIDC) of the
+manifest-list digest — one signature verifies regardless of which arch
+the consumer pulls.
+
+```bash
+cosign verify ghcr.io/taucad/opencascade.js@sha256:abc123... \
+ --certificate-identity-regexp 'https://github.com/taucad/opencascade\.js/\.github/workflows/docker\.yml@.*' \
+ --certificate-oidc-issuer https://token.actions.githubusercontent.com
+```
+
+A successful verification confirms the image was built by the
+`taucad/opencascade.js` GitHub Actions `docker.yml` workflow and has not
+been tampered with since publication. CI failing this step on a sudden
+mismatch is a smoking gun that something tampered with the supply chain.
+
+## 2b. Verify SLSA provenance attestation
+
+In addition to the cosign signature, the image ships a SLSA provenance
+attestation:
+
+```bash
+cosign verify-attestation \
+ --type slsaprovenance \
+ --certificate-identity-regexp 'https://github\.com/taucad/opencascade\.js/\.github/workflows/docker\.yml@.*' \
+ --certificate-oidc-issuer https://token.actions.githubusercontent.com \
+ ghcr.io/taucad/opencascade.js@sha256:abc123...
+```
+
+The attestation records the source commit, the runner, and the workflow
+that produced the image.
+
+## 3. Extract SBOM
+
+```bash
+docker buildx imagetools inspect \
+ --format '{{ json .SBOM }}' \
+ ghcr.io/taucad/opencascade.js@sha256:abc123...
+```
+
+The SBOM lists every apt package and pinned commit (OCCT, freetype, rapidjson)
+embedded in the image. Diff it against the prior digest's SBOM in CI to flag
+unexpected dep bumps.
+
+## 4. Lock downstream consumers
+
+In your `package.json`, pin the npm tarball alongside the docker digest:
+
+```json
+{
+ "dependencies": {
+ "@taucad/opencascade.js": "3.0.0-beta.5"
+ },
+ "pnpm": {
+ "supportedArchitectures": {
+ "os": ["linux", "darwin"],
+ "cpu": ["x64", "arm64"]
+ }
+ }
+}
+```
+
+Commit `pnpm-lock.yaml`. The lockfile records the integrity hash of the
+published tarball; if it ever changes, `pnpm install --frozen-lockfile` fails
+in CI.
+
+## End-to-end CI snippet
+
+```yaml title=".github/workflows/wasm-build.yml"
+jobs:
+ build-wasm:
+ runs-on: ubuntu-24.04
+ steps:
+ - uses: actions/checkout@v4
+
+ - name: Verify cosign signature
+ run: |
+ DIGEST=$(cat .ocjs-digest)
+ cosign verify "ghcr.io/taucad/opencascade.js@${DIGEST}" \
+ --certificate-identity-regexp 'https://github.com/taucad/opencascade\.js/\.github/workflows/docker\.yml@.*' \
+ --certificate-oidc-issuer https://token.actions.githubusercontent.com
+
+ - name: Verify image provenance
+ run: |
+ DIGEST=$(cat .ocjs-digest)
+ cosign verify-attestation --type slsaprovenance \
+ --certificate-identity-regexp 'https://github\.com/taucad/opencascade\.js/\.github/workflows/docker\.yml@.*' \
+ --certificate-oidc-issuer https://token.actions.githubusercontent.com \
+ "ghcr.io/taucad/opencascade.js@${DIGEST}"
+
+ - name: Build wasm
+ run: |
+ DIGEST=$(cat .ocjs-digest)
+ docker run --rm \
+ -v "$(pwd):/src" \
+ -u "$(id -u):$(id -g)" \
+ "ghcr.io/taucad/opencascade.js@${DIGEST}" \
+ link build-configs/my-config.yml
+
+ - name: Assert wasm hash
+ run: |
+ EXPECTED=$(cat .wasm-hash)
+ ACTUAL=$(sha256sum my-config.wasm | cut -d' ' -f1)
+ [ "$EXPECTED" = "$ACTUAL" ] || { echo "wasm hash drift"; exit 1; }
+```
+
+The trailing `assert wasm hash` step is the safety net. If `EXPECTED` and
+`ACTUAL` ever diverge, something in the published image changed — either
+intentionally (bump your `.wasm-hash`) or by accident (investigate).
diff --git a/docs-site/content/docs/toolchain/guides/trim-symbols.mdx b/docs-site/content/docs/toolchain/guides/trim-symbols.mdx
new file mode 100644
index 00000000..d57671f2
--- /dev/null
+++ b/docs-site/content/docs/toolchain/guides/trim-symbols.mdx
@@ -0,0 +1,220 @@
+---
+title: Trim symbols
+description: Drive the published Docker image to cut full.yml down to a consumer-sized symbol set — workflow, budget, and worked example.
+---
+
+`opencascade_full.wasm` binds ~4,400 OCCT classes and weighs roughly 27 MB.
+Most consumers need a fraction of that surface — a STEP round-tripper might
+touch ~120 classes, a glTF mesher even fewer. Trimming the YAML symbol list
+shrinks the wasm payload and reduces startup time.
+
+This guide drives the entire workflow through the published Docker image so
+you do not need `emsdk`, `libclang`, or Python installed locally. The image
+ships with `emsdk`, `libclang`, Python, the precompiled OCCT object cache,
+and the reference `full.yml` already in place.
+
+## Prerequisites
+
+- Docker (or any OCI runtime — Colima, Rancher Desktop, OrbStack all work).
+- A working directory under your home folder (`/Users/...` on macOS,
+ `C:\Users\...` on Windows). Other top-level folders like `/tmp` and
+ `/opt` are not shared into the Docker VM by default and will silently
+ drop build outputs.
+- Familiarity with the YAML schema. See [YAML schema](../reference/yaml-schema)
+ for the full reference.
+
+If you have not used the image before, run the
+[Quickstart — Docker](../getting-started/quick-start-docker) once to verify
+your setup before trimming.
+
+## Size budget
+
+Each bound class contributes roughly 15–25 KB to the linked wasm. A
+reasonable target by use case:
+
+| Use case | Symbols | Approximate wasm size |
+| ---------------------------------------------- | ------------------: | --------------------: |
+| Single-format viewer (read STEP → mesh) | 80–150 | 2–4 MB |
+| Round-trip pipeline (STEP/IGES edit + write) | 200–400 | 5–10 MB |
+| Full code-CAD tool (booleans + fillets + sweep) | 600–1,200 | 12–20 MB |
+| Reference / kitchen sink | 4,400 (`full.yml`) | ~27 MB |
+
+Numbers are after `-O3 -msimd128 -sWASM_BIGINT -sEVAL_CTORS=2`.
+
+## Steps
+
+### 1. Extract the reference `full.yml`
+
+The image ships the reference `full.yml` at
+`/opencascade.js/build-configs/full.yml`. Pull it out with an entrypoint
+override so you can use it as your starting point:
+
+```bash
+docker run --rm --entrypoint cat \
+ ghcr.io/taucad/opencascade.js:single-threaded \
+ /opencascade.js/build-configs/full.yml \
+ > my-config.yml
+```
+
+If you already know exactly which classes you need you can also hand-write
+`my-config.yml` from scratch — see the worked example below.
+
+### 2. Delete the classes you don't need
+
+Open `my-config.yml` and remove any `bindings` entry you don't call from
+JavaScript. There is no transitive closure to compute — Handle typedefs
+and `NCollection_*` members for the surviving classes are auto-discovered
+at codegen time, so you only list classes you instantiate or pass
+references to.
+
+### 3. Validate
+
+```bash
+docker run --rm \
+ -v "$(pwd):/src" \
+ -u "$(id -u):$(id -g)" \
+ ghcr.io/taucad/opencascade.js:single-threaded \
+ validate /src/my-config.yml
+```
+
+`validate` parses the YAML against the schema and fails non-zero on any
+malformed entry, unknown key, or duplicated symbol. It does not run the
+C++ pipeline, so it returns in under a second.
+
+### 4. Link
+
+```bash
+docker run --rm \
+ -v "$(pwd):/src" \
+ -u "$(id -u):$(id -g)" \
+ ghcr.io/taucad/opencascade.js:single-threaded \
+ link my-config.yml
+```
+
+`link` reuses the precompiled `.o` files baked into the image for every
+still-bound class, so a trim that strips half of `full.yml` typically
+completes in 60–180 seconds.
+
+Output lands next to `my-config.yml` (per `OCJS_OUTPUT_DIR=/src` default):
+
+- `.wasm` — the trimmed wasm binary
+- `.js` — the emscripten loader
+- `.d.ts` — generated TypeScript declarations
+- `