diff --git a/.editorconfig b/.editorconfig
new file mode 100644
index 0000000..f543bcf
--- /dev/null
+++ b/.editorconfig
@@ -0,0 +1,36 @@
+# EditorConfig — https://editorconfig.org
+# Top-level config; no parent lookups beyond this file.
+root = true
+
+[*]
+charset = utf-8
+end_of_line = lf
+indent_style = space
+indent_size = 2
+trim_trailing_whitespace = true
+insert_final_newline = true
+
+# Go uses tabs (gofmt is non-negotiable).
+[*.go]
+indent_style = tab
+
+# TS / JS / JSON — 2-space (matches Prettier + tsconfig conventions).
+[*.{ts,tsx,js,jsx,mjs,cjs,json,jsonc}]
+indent_style = space
+indent_size = 2
+
+# YAML — 2-space (contract/*.yaml, GitHub Actions).
+[*.{yml,yaml}]
+indent_style = space
+indent_size = 2
+
+# Markdown — preserve trailing spaces (two-space line-break trick).
+[*.md]
+trim_trailing_whitespace = false
+
+# Makefiles require literal tabs.
+[Makefile]
+indent_style = tab
+
+[**/Makefile]
+indent_style = tab
diff --git a/.github/CODEOWNERS b/.github/CODEOWNERS
new file mode 100644
index 0000000..47afa6c
--- /dev/null
+++ b/.github/CODEOWNERS
@@ -0,0 +1,31 @@
+# CODEOWNERS — Review routing for edge-agents
+#
+# Syntax: https://docs.github.com/en/repositories/managing-your-repositorys-settings-and-features/customizing-your-repository/about-code-owners
+# Order matters: the LAST matching pattern wins for a given file.
+#
+# NOTE: The @ForestHubAI/maintainers team must exist in the GitHub org
+# (Org Settings → Teams) for these mentions to resolve. Without the team,
+# GitHub will show "Unknown owner" warnings on the Branch protection /
+# PR review UI but CODEOWNERS routing will silently no-op.
+
+# ---------------------------------------------------------------------------
+# Default owner — applies to anything not covered by a more specific rule below
+# ---------------------------------------------------------------------------
+*                   @ForestHubAI/maintainers
+
+# ---------------------------------------------------------------------------
+# Language subtrees
+# ---------------------------------------------------------------------------
+/go/                @ForestHubAI/maintainers
+/ts/                @ForestHubAI/maintainers
+
+# ---------------------------------------------------------------------------
+# Contract subtree — CRITICAL: this is the source of truth. Drift between
+# go/ and ts/ codegen from the OpenAPI 3.0.3 contracts must always be reviewed.
+# ---------------------------------------------------------------------------
+/contract/          @ForestHubAI/maintainers
+
+# ---------------------------------------------------------------------------
+# Repo meta: CI workflows, issue templates, CODEOWNERS itself
+# ---------------------------------------------------------------------------
+/.github/           @ForestHubAI/maintainers
diff --git a/.github/CONTRIBUTING.md b/.github/CONTRIBUTING.md
index ccc0503..348aa42 100644
--- a/.github/CONTRIBUTING.md
+++ b/.github/CONTRIBUTING.md
@@ -100,11 +100,14 @@ Use clear, prefixed messages: `feat:`, `fix:`, `refactor:`, `test:`, `docs:`.
 
 ## License and Contributor Agreement
 
-edge-agents is dual-licensed: the public release is distributed under
-[AGPL-3.0](../LICENSE), and ForestHub offers separate commercial licenses for use
-cases that are incompatible with the AGPL (commercial licensing: root@foresthub.ai).
-To keep this model viable, every contribution must grant ForestHub the rights needed
-to offer it under both license regimes.
+edge-agents uses a **two-tier license model**: the `contract/` and
+`ts/workflow-core/` subdirectories are released under [Apache-2.0](../contract/LICENSE),
+and all other components (engine, LLM proxy, workflow-builder, app) are released
+under [AGPL-3.0](../LICENSE) with the option for ForestHub to also offer them under a
+separate commercial license for use cases that are incompatible with the AGPL
+(commercial licensing: root@foresthub.ai). To keep this model viable, every
+contribution must grant ForestHub the rights needed to offer it under both license
+regimes.
 
 **By submitting a contribution (pull request, patch, or any other code or
 documentation change), you agree to the following terms:**
@@ -153,3 +156,16 @@ including for presently unknown forms of use to the extent allowed by §31a UrhG
 You confirm these terms by checking the Contributor License Agreement boxes in the pull
 request template when you open your PR. A maintainer verifies this before merging; a PR
 whose CLA boxes are not checked will not be merged.
+
+### Which license your contribution falls under
+
+The repository uses a two-tier license model:
+
+- Contributions to `contract/` and `ts/workflow-core/` are released under
+  **Apache-2.0**.
+- Contributions to all other paths (engine, LLM proxy, workflow-builder, app) are
+  released under **AGPL-3.0-only** with the option for ForestHub to also offer them
+  under a commercial license (per the CLA above).
+
+If your PR touches both tiers, the per-file license header (or, where absent, the
+directory-level `LICENSE`/`NOTICE`) governs.
diff --git a/.github/FUNDING.yml b/.github/FUNDING.yml
new file mode 100644
index 0000000..cd7fe7d
--- /dev/null
+++ b/.github/FUNDING.yml
@@ -0,0 +1,18 @@
+# GitHub Sponsors and other funding platforms for this repository.
+# Reference: https://docs.github.com/en/repositories/managing-your-repositorys-settings-and-features/customizing-your-repository/displaying-a-sponsor-button-in-your-repository
+
+github: ForestHubAI
+
+# Additional platforms (uncomment to enable later):
+# patreon: # Replace with a single Patreon username
+# open_collective: # Replace with a single Open Collective username
+# ko_fi: # Replace with a single Ko-fi username
+# tidelift: # Replace with a single Tidelift platform-name/package-name
+# community_bridge: # Replace with a single Community Bridge project-name
+# liberapay: # Replace with a single Liberapay username
+# issuehunt: # Replace with a single IssueHunt username
+# lfx_crowdfunding: # Replace with a single LFX Crowdfunding project-name
+# polar: # Replace with a single Polar username
+# buy_me_a_coffee: # Replace with a single Buy Me a Coffee username
+# thanks_dev: # Replace with a single thanks.dev username
+# custom: # Replace with up to 4 custom sponsorship URLs
diff --git a/.github/ISSUE_TEMPLATE/config.yml b/.github/ISSUE_TEMPLATE/config.yml
new file mode 100644
index 0000000..34fbc71
--- /dev/null
+++ b/.github/ISSUE_TEMPLATE/config.yml
@@ -0,0 +1,31 @@
+# Issue-template chooser config.
+# Reference: https://docs.github.com/en/communities/using-templates-to-encourage-useful-issues-and-pull-requests/configuring-issue-templates-for-your-repository
+#
+# Forces contributors to pick a structured template (bug_report / feature_request)
+# instead of opening blank issues. The contact_links route off-topic intents
+# (questions, security reports, commercial inquiries) to the right channel so
+# the issue tracker stays focused on actionable engineering work.
+
+blank_issues_enabled: false
+
+contact_links:
+  - name: Question / Discussion
+    url: https://github.com/ForestHubAI/edge-agents/discussions
+    about: |
+      Have a question, an idea, or want to discuss usage? Please open a
+      GitHub Discussion instead of an issue. (If Discussions is not yet
+      enabled on this repo, this link will 404 until the maintainer turns
+      it on in Settings → Features.)
+
+  - name: Security Vulnerability
+    url: https://github.com/ForestHubAI/edge-agents/security/advisories/new
+    about: |
+      Please do NOT open a public issue for security vulnerabilities. Use
+      GitHub's private vulnerability reporting, or email root@foresthub.ai.
+      See .github/SECURITY.md for scope and process.
+
+  - name: Commercial License Inquiry
+    url: mailto:root@foresthub.ai
+    about: |
+      edge-agents is dual-licensed (AGPL-3.0-only + commercial). For use
+      cases that are incompatible with AGPL, contact root@foresthub.ai.
diff --git a/.github/PULL_REQUEST_TEMPLATE.md b/.github/PULL_REQUEST_TEMPLATE.md
index 5cfb35d..491c85e 100644
--- a/.github/PULL_REQUEST_TEMPLATE.md
+++ b/.github/PULL_REQUEST_TEMPLATE.md
@@ -26,6 +26,6 @@
 
 ## Contributor License Agreement
 
-- [ ] I agree to the terms in [CONTRIBUTING.md § License and Contributor Agreement](./CONTRIBUTING.md#license-and-contributor-agreement), including ForestHub's right to relicense my contribution commercially in addition to AGPL-3.0.
+- [ ] I agree to the terms in [CONTRIBUTING.md § License and Contributor Agreement](./CONTRIBUTING.md#license-and-contributor-agreement). I understand that contributions to `contract/` and `ts/workflow-core/` are released under Apache-2.0, and contributions to all other paths are released under AGPL-3.0-only with ForestHub's right to also offer them under a commercial license.
 - [ ] My contribution is my own original work and I am legally entitled to submit it under these terms.
 - [ ] This contribution was created **outside** any employment, work-for-hire, or contractor obligations and **without** the use of employer-owned equipment, accounts, or time — **OR** my employer has explicitly authorized me to submit it under these terms and has waived any rights under §69b UrhG (or equivalent foreign law) for this contribution.
diff --git a/.github/dependabot.yml b/.github/dependabot.yml
new file mode 100644
index 0000000..c935f11
--- /dev/null
+++ b/.github/dependabot.yml
@@ -0,0 +1,70 @@
+version: 2
+
+updates:
+  # Go module (root of Go code is /go)
+  - package-ecosystem: "gomod"
+    directory: "/go"
+    schedule:
+      interval: "weekly"
+      day: "monday"
+    open-pull-requests-limit: 5
+    commit-message:
+      prefix: "chore"
+      prefix-development: "chore"
+      include: "scope"
+    groups:
+      go-minor-and-patch:
+        applies-to: version-updates
+        update-types:
+          - "minor"
+          - "patch"
+      go-security:
+        applies-to: security-updates
+        update-types:
+          - "minor"
+          - "patch"
+
+  # npm workspace root (handles workflow-core, workflow-builder, app)
+  - package-ecosystem: "npm"
+    directory: "/ts"
+    schedule:
+      interval: "weekly"
+      day: "monday"
+    open-pull-requests-limit: 5
+    commit-message:
+      prefix: "chore"
+      prefix-development: "chore"
+      include: "scope"
+    groups:
+      npm-minor-and-patch:
+        applies-to: version-updates
+        update-types:
+          - "minor"
+          - "patch"
+      npm-security:
+        applies-to: security-updates
+        update-types:
+          - "minor"
+          - "patch"
+
+  # GitHub Actions workflows
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    schedule:
+      interval: "weekly"
+      day: "monday"
+    open-pull-requests-limit: 5
+    commit-message:
+      prefix: "chore"
+      include: "scope"
+    groups:
+      actions-minor-and-patch:
+        applies-to: version-updates
+        update-types:
+          - "minor"
+          - "patch"
+      actions-security:
+        applies-to: security-updates
+        update-types:
+          - "minor"
+          - "patch"
diff --git a/.github/workflows/codeql.yml b/.github/workflows/codeql.yml
new file mode 100644
index 0000000..3b4bac0
--- /dev/null
+++ b/.github/workflows/codeql.yml
@@ -0,0 +1,51 @@
+name: CodeQL
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+    branches: [main]
+  schedule:
+    # Weekly on Sundays at 04:17 UTC. Off-peak, off the hour.
+    - cron: "17 4 * * 0"
+
+permissions:
+  contents: read
+  actions: read
+  security-events: write
+
+jobs:
+  analyze:
+    name: Analyze (${{ matrix.language }})
+    runs-on: ubuntu-latest
+    timeout-minutes: 30
+    strategy:
+      fail-fast: false
+      matrix:
+        # CodeQL's modern "javascript-typescript" identifier covers ts/.
+        # "go" covers go/ — autobuild finds the module via go/go.mod.
+        language: [go, javascript-typescript]
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Setup Go
+        if: matrix.language == 'go'
+        uses: actions/setup-go@v5
+        with:
+          go-version-file: go/go.mod
+          cache-dependency-path: go/go.sum
+
+      - name: Initialize CodeQL
+        uses: github/codeql-action/init@v3
+        with:
+          languages: ${{ matrix.language }}
+          queries: security-and-quality
+
+      - name: Autobuild
+        uses: github/codeql-action/autobuild@v3
+
+      - name: Perform CodeQL analysis
+        uses: github/codeql-action/analyze@v3
+        with:
+          category: "/language:${{ matrix.language }}"
diff --git a/.github/workflows/gitleaks.yml b/.github/workflows/gitleaks.yml
new file mode 100644
index 0000000..fa30d1e
--- /dev/null
+++ b/.github/workflows/gitleaks.yml
@@ -0,0 +1,29 @@
+name: gitleaks
+
+on:
+  push:
+  pull_request:
+
+permissions:
+  contents: read
+  pull-requests: write
+
+jobs:
+  scan:
+    name: Scan for leaked secrets
+    runs-on: ubuntu-latest
+    timeout-minutes: 10
+    steps:
+      - name: Checkout (full history)
+        uses: actions/checkout@v4
+        with:
+          # gitleaks needs the full history to scan past commits, not just
+          # the diff. Shallow clone would miss anything before the last fetch.
+          fetch-depth: 0
+
+      - name: Run gitleaks
+        uses: gitleaks/gitleaks-action@v2
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          # No GITLEAKS_LICENSE on purpose: it's a paid-tier key. Public repos
+          # get full functionality on the free tier without it.
diff --git a/.github/workflows/lint.yml b/.github/workflows/lint.yml
new file mode 100644
index 0000000..3303fc6
--- /dev/null
+++ b/.github/workflows/lint.yml
@@ -0,0 +1,43 @@
+name: Lint
+
+on:
+  pull_request:
+    branches: [main]
+  push:
+    branches: [main]
+
+permissions:
+  contents: read
+
+jobs:
+  go-lint:
+    name: Go (golangci-lint)
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-go@v5
+        with:
+          go-version-file: go/go.mod
+          cache-dependency-path: go/go.sum
+      - name: golangci-lint
+        uses: golangci/golangci-lint-action@v6
+        with:
+          version: latest
+          working-directory: go
+          args: --timeout=5m
+
+  ts-lint:
+    name: TS (eslint)
+    runs-on: ubuntu-latest
+    defaults:
+      run:
+        working-directory: ts
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-node@v4
+        with:
+          node-version: 20
+          cache: npm
+          cache-dependency-path: ts/package-lock.json
+      - run: npm ci
+      - run: npm run lint
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
new file mode 100644
index 0000000..ff03631
--- /dev/null
+++ b/.github/workflows/release.yml
@@ -0,0 +1,116 @@
+name: Release container
+
+# Builds and publishes the multi-arch engine container to GHCR on every
+# `go/vX.Y.Z` tag — the same tag that releases the Go module (see RELEASING.md).
+# Image: ghcr.io/foresthubai/edge-agents/engine
+#
+# Triggered manually via workflow_dispatch for one-off rebuilds, but the
+# canonical path is `git tag go/vX.Y.Z && git push origin go/vX.Y.Z`.
+
+on:
+  push:
+    tags: ['go/v*']
+  workflow_dispatch:
+    inputs:
+      tag:
+        description: 'Override image tag (default: derived from ref / sha)'
+        required: false
+        type: string
+
+permissions:
+  contents: read
+  packages: write
+  id-token: write       # cosign keyless OIDC + provenance attestations
+  attestations: write   # actions/attest-* writes to the attestation store
+
+env:
+  REGISTRY: ghcr.io
+  IMAGE_NAME: foresthubai/edge-agents/engine
+
+jobs:
+  build-and-push:
+    name: Build, push, sign (linux/amd64,arm64)
+    runs-on: ubuntu-latest
+    outputs:
+      digest: ${{ steps.build.outputs.digest }}
+      tags: ${{ steps.meta.outputs.tags }}
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v3
+        with:
+          platforms: arm64
+
+      - name: Set up Buildx
+        uses: docker/setup-buildx-action@v3
+
+      - name: Log in to GHCR
+        uses: docker/login-action@v3
+        with:
+          registry: ${{ env.REGISTRY }}
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      # Strips the `go/` prefix from `refs/tags/go/v1.2.3` so the image gets
+      # `1.2.3`, `1.2`, `1`, and `latest` rather than literally `go-v1.2.3`.
+      - name: Compute image tags + labels
+        id: meta
+        uses: docker/metadata-action@v5
+        with:
+          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
+          tags: |
+            type=match,pattern=go/(v.*),group=1
+            type=match,pattern=go/v(\d+\.\d+\.\d+),group=1
+            type=match,pattern=go/v(\d+\.\d+)\.\d+,group=1
+            type=match,pattern=go/v(\d+)\.\d+\.\d+,group=1
+            type=raw,value=latest,enable={{is_default_branch}}
+            type=raw,value=latest,enable=${{ startsWith(github.ref, 'refs/tags/go/v') }}
+            type=raw,value=${{ inputs.tag }},enable=${{ inputs.tag != '' }}
+          labels: |
+            org.opencontainers.image.title=ForestHub edge-agents engine
+            org.opencontainers.image.description=Workflow runtime for embedded and edge AI agents.
+            org.opencontainers.image.vendor=ForestHub
+            org.opencontainers.image.licenses=AGPL-3.0-only
+            org.opencontainers.image.source=https://github.com/${{ github.repository }}
+            org.opencontainers.image.url=https://github.com/${{ github.repository }}
+            org.opencontainers.image.documentation=https://github.com/${{ github.repository }}#readme
+
+      - name: Build and push
+        id: build
+        uses: docker/build-push-action@v6
+        with:
+          context: go
+          file: go/Dockerfile
+          platforms: linux/amd64,linux/arm64
+          push: true
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}
+          cache-from: type=gha
+          cache-to: type=gha,mode=max
+          provenance: mode=max
+          sbom: true
+
+      - name: Install cosign
+        uses: sigstore/cosign-installer@v3
+
+      # Keyless signing — uses the GitHub OIDC token, no long-lived secret.
+      # Signs by digest so every tag pointing at this build is covered.
+      - name: Sign image
+        env:
+          DIGEST: ${{ steps.build.outputs.digest }}
+          TAGS: ${{ steps.meta.outputs.tags }}
+        run: |
+          set -euo pipefail
+          for tag in $TAGS; do
+            ref="${tag%:*}@${DIGEST}"
+            echo "cosign sign $ref"
+            cosign sign --yes "$ref"
+          done
+
+      - name: Attest build provenance
+        uses: actions/attest-build-provenance@v2
+        with:
+          subject-name: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
+          subject-digest: ${{ steps.build.outputs.digest }}
+          push-to-registry: true
diff --git a/.github/workflows/spectral.yml b/.github/workflows/spectral.yml
new file mode 100644
index 0000000..b662e70
--- /dev/null
+++ b/.github/workflows/spectral.yml
@@ -0,0 +1,31 @@
+name: Spectral
+
+on:
+  pull_request:
+    branches: [main]
+    paths:
+      - "contract/**"
+      - ".spectral.yaml"
+      - ".github/workflows/spectral.yml"
+  push:
+    branches: [main]
+    paths:
+      - "contract/**"
+      - ".spectral.yaml"
+      - ".github/workflows/spectral.yml"
+
+permissions:
+  contents: read
+  pull-requests: write
+  checks: write
+
+jobs:
+  spectral:
+    name: Lint OpenAPI contracts
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: stoplightio/spectral-action@v0.8.13
+        with:
+          file_glob: "contract/*.yaml"
+          spectral_ruleset: .spectral.yaml
diff --git a/.gitignore b/.gitignore
index 59cbdfd..ccf5965 100644
--- a/.gitignore
+++ b/.gitignore
@@ -8,6 +8,9 @@ ts/**/dist/
 # Go
 *.test
 *.out
+go/fh-agent
+go/build/
+go/dist/
 
 # Engine deploy build artifacts (image tarball produced by `docker save`)
 *.tar
diff --git a/.spectral.yaml b/.spectral.yaml
new file mode 100644
index 0000000..d47c47d
--- /dev/null
+++ b/.spectral.yaml
@@ -0,0 +1 @@
+extends: ["spectral:oas"]
diff --git a/CHANGELOG.md b/CHANGELOG.md
new file mode 100644
index 0000000..2302d71
--- /dev/null
+++ b/CHANGELOG.md
@@ -0,0 +1,98 @@
+# Changelog
+
+All notable changes to this project are documented in this file.
+
+The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/).
+This repository hosts multiple release lines (Go binaries under `go/`, npm
+packages under `ts/`) and each line follows [Semantic Versioning](https://semver.org/spec/v2.0.0.html)
+independently.
+
+## [Unreleased]
+
+### Added
+- `fh-agent` CLI: compile `site.spec.yaml` into deployable edge-agent bundles.
+- `fh-agent` CLI: contract-schema validation via `fh-builder` subprocess.
+- `fh-agent`: dedicated `ROADMAP.md` alongside the CLI.
+- Dependabot configuration for Go modules, npm packages, and GitHub Actions.
+- Repository governance: `CODEOWNERS` for review routing, `FUNDING.yml`.
+
+### Changed
+- README rewritten as a category-defining, SEO/GEO-optimized engineering entry
+  point; SLM/Local-provider story surfaced; hero tagline, Features section,
+  ASCII diagram, and branded footer restored.
+
+### Removed
+- Commented-out `resilience.go` stub from `llmproxy`.
+
+## [go/v1.0.1] - 2026-05-29
+
+First tagged Go release after the `fh-core` → `edge-agents` repository rename.
+
+### Added
+- AGPL license header, `NOTICE`, and third-party notices across the tree.
+- Initial README and community health files (issue templates, contributing).
+- `cmd-engine`: standalone mode (operates without backend) and multi-arch
+  Dockerfile.
+- `cmd-engine`: CI workflow with image-tarball gitignore.
+- Backend-routed LLM provider in `engine-backend`.
+- `engine`: Lifecycle port (replaces `ControlPlane`); typed ports for LLM /
+  Memory / Retriever with contract regeneration.
+- MQTT channel: topic support; `line`/`channel` promoted to binding fields.
+- Go `cmd` package wired back into the builder UI flow.
+- Working CLI for the engine.
+- Tests: `llmproxy-provider` now reads Vertex AI config from env; coverage
+  expanded.
+
+### Changed
+- Repository renamed from `fh-core` to `edge-agents`; package layout
+  flattened.
+- `engine`: ticker and JSON-type helpers moved into the `mapping` package;
+  logging extracted into its own package (`Activity` helper dropped).
+- `engine`: memory tests isolated from the backend adapter.
+- Workflow YAML: deployment mapping removed.
+- Mapping promoted to a dedicated package; `engineapi` dependency removed
+  from `engine`; mapping folded into `llmproxy`.
+
+### Fixed
+- Lockstep / CI contract-drift check.
+- npm lockfile regeneration with optional deps (works around npm bug).
+
+## [ts/0.1.1] - 2026-05-29
+
+First documented release of the TypeScript workspace
+(`@foresthubai/workflow-core`, `@foresthubai/workflow-builder`).
+
+### Added
+- Visual workflow builder SPA (`workflow-builder`) with drag-and-drop canvas,
+  canvas tabs toolbar, and overhauled scrollbars.
+- `workflow-core`: workflow schema migration infrastructure; builder
+  auto-migrates workflows on load.
+- Node library: model declared as a resource alongside the catalog; unified
+  RAG and memory abstractions.
+- Function configuration and diagnostics enhancements; function definition
+  scoped at editor level rather than per-canvas.
+- Parameter system overhaul and serialization streamlining across nodes and
+  channels.
+- Localization for toast messages and validation feedback.
+- ESLint + Prettier setup across the TS workspace.
+- TS release system (publish scripts under `ts/scripts/`).
+
+### Changed
+- `workflow-core` refactored; mapping promoted to its own package.
+- Unified UI colors and node-library design; unified name de-duplication and
+  selection model.
+- `isDirty` tracking now driven by `mutationCount` in history.
+
+### Fixed
+- `Parameter.ts` casing corrected to match imports.
+- Leaked React dependency in `workflow-core` removed; assorted code-smell
+  cleanup, type errors, and tests referring to old nodes.
+
+## [0.0.0] - 2026-05-19
+
+Initial commit. Internal prototype prior to the first tagged release.
+
+[Unreleased]: https://github.com/ForestHubAI/edge-agents/compare/go/v1.0.1...HEAD
+[go/v1.0.1]: https://github.com/ForestHubAI/edge-agents/releases/tag/go/v1.0.1
+[ts/0.1.1]: https://github.com/ForestHubAI/edge-agents/tree/main/ts
+[0.0.0]: https://github.com/ForestHubAI/edge-agents/commit/d9e6f9d
diff --git a/NOTICE b/NOTICE
index 9d415f7..6fa1092 100644
--- a/NOTICE
+++ b/NOTICE
@@ -1,11 +1,23 @@
 edge-agents
 Copyright (c) 2026 ForestHub. All rights reserved.
 
-This product is licensed under the GNU Affero General Public License v3.0
-(AGPL-3.0-only); see the LICENSE file for the full text.
+This product includes software developed by ForestHub
+(https://foresthub.ai).
+
+This repository uses a two-tier license model:
+
+  - The contract/ and ts/workflow-core/ subdirectories are licensed under
+    the Apache License, Version 2.0. See contract/LICENSE and
+    contract/NOTICE, and ts/workflow-core/LICENSE and
+    ts/workflow-core/NOTICE for details.
+
+  - All other components (engine, LLM proxy, workflow-builder, app) are
+    licensed under the GNU Affero General Public License v3.0
+    (AGPL-3.0-only); see the LICENSE file for the full AGPL text.
 
 edge-agents is dual-licensed. In addition to the AGPL-3.0, ForestHub offers
-separate commercial licenses for use cases that are incompatible with the
-AGPL. For commercial licensing, contact root@foresthub.ai.
+separate commercial licenses for the AGPL components for use cases that are
+incompatible with the AGPL. For commercial licensing, contact
+root@foresthub.ai.
 
 Third-party components retain their original licenses; see THIRD_PARTY_NOTICES.
diff --git a/README.md b/README.md
index 1c129c7..1757114 100644
--- a/README.md
+++ b/README.md
@@ -1,10 +1,14 @@
 # edge-agents
 
-**The open-source runtime for embedded and edge AI agents.**
+**A ~32 MB AI agent runtime for edge devices.** Runs offline. GPIO, MQTT, and UART as first-class nodes. From a Raspberry Pi to industrial gateways.
 
 [![CI](https://github.com/ForestHubAI/edge-agents/actions/workflows/ci.yml/badge.svg)](https://github.com/ForestHubAI/edge-agents/actions/workflows/ci.yml)
 [![Go Reference](https://pkg.go.dev/badge/github.com/ForestHubAI/edge-agents/go.svg)](https://pkg.go.dev/github.com/ForestHubAI/edge-agents/go)
+[![Go Version](https://img.shields.io/github/go-mod/go-version/ForestHubAI/edge-agents?filename=go%2Fgo.mod)](go/go.mod)
 [![License: AGPL v3](https://img.shields.io/badge/License-AGPL_v3-blue.svg)](LICENSE)
+[![GitHub stars](https://img.shields.io/github/stars/ForestHubAI/edge-agents?style=flat)](https://github.com/ForestHubAI/edge-agents/stargazers)
+[![GitHub last commit](https://img.shields.io/github/last-commit/ForestHubAI/edge-agents)](https://github.com/ForestHubAI/edge-agents/commits)
+[![GitHub issues](https://img.shields.io/github/issues/ForestHubAI/edge-agents)](https://github.com/ForestHubAI/edge-agents/issues)
 
 `edge-agents` is the open-source core of the [ForestHub](https://foresthub.ai)
 platform. It contains the Go runtime engine, a multi-provider LLM proxy with
@@ -36,7 +40,7 @@ not in this repository.
 - **Contract-typed wire format** — every API generated from `contract/*.yaml`
   in both Go and TypeScript; CI fails on drift.
 - **Distroless multi-arch container** — `linux/amd64` and `linux/arm64`,
-  nonroot, ~15 MB.
+  nonroot, ~32 MB.
 
 ## Contents
 
@@ -52,6 +56,28 @@ not in this repository.
 Go and TypeScript are independently buildable. Only `contract/` edits touch
 both sides.
 
+## Why edge-agents
+
+Most AI agent frameworks assume datacenter GPUs and always-on cloud APIs.
+`edge-agents` is built for the other end of the spectrum — embedded Linux on
+industrial gateways, SBCs, and edge nodes. Here is how it compares to projects
+people often evaluate alongside it.
+
+| | edge-agents | LangGraph | n8n | Dify |
+|---|---|---|---|---|
+| Container image (compressed) | **~32 MB** | n/a (Python library) | ~368 MB | ~900 MB |
+| Runs offline / air-gapped | first-class (`ENGINE_STANDALONE=true`) | depends on host app | possible, manual telemetry-disable | not designed for it |
+| Hardware I/O (GPIO, ADC/DAC/PWM, UART) | first-class engine nodes | no | only via shell-exec workarounds | no |
+| MQTT transport | first-class | no | community node | no |
+| Visual builder | yes (React Flow, embeddable) | no | yes | yes |
+| Local SLMs (`llama.cpp`, `vLLM`, `Ollama`, …) | typed registry, capability routing | via custom code | community nodes | yes |
+| License | AGPL-3.0 + commercial | MIT | Sustainable Use License | Apache-2.0 |
+
+Container sizes were measured against the latest public images on Docker Hub
+in May 2026 (n8n: `n8nio/n8n:latest`, Dify: `langgenius/dify-api:main`); the
+`edge-agents` figure is the linux/arm64 binary cross-compiled with
+`CGO_ENABLED=0 -ldflags='-s -w'` on top of `gcr.io/distroless/static-debian12`.
+
 ## Quickstart
 
 ### Engine (Docker)
@@ -251,13 +277,21 @@ scope and process.
 
 ## License
 
-Dual-licensed:
-
-- [AGPL-3.0-only](LICENSE) for open-source use — including the AGPL
-  requirement to make corresponding source available to users who interact
-  with a modified version over a network.
-- A separate **commercial license** for use cases incompatible with the AGPL.
-  Contact **root@foresthub.ai**.
+`edge-agents` uses a **two-tier license model** designed to make the wire
+format and the headless workflow model maximally reusable while keeping
+the engine and the visual builder protected under copyleft.
+
+| Component | License | Why |
+| --- | --- | --- |
+| [`contract/`](contract) (OpenAPI schemas) | **Apache-2.0** | Wire format. Third-party Python, Rust, or Java clients should be free to implement against it. |
+| [`ts/workflow-core`](ts/workflow-core) (headless model) | **Apache-2.0** | Workflow model and validation. Same reasoning — should be embeddable into any TypeScript/JavaScript project without copyleft friction. |
+| [`go/`](go) (engine, LLM proxy, drivers) | **AGPL-3.0-only** or **commercial** | Keeps hosted "edge-agents as a service" offerings honest. For commercial use cases incompatible with AGPL, contact **root@foresthub.ai**. |
+| [`ts/workflow-builder`](ts/workflow-builder) (React canvas) | **AGPL-3.0-only** or **commercial** | Same dual-license terms as the engine. |
+| [`ts/app`](ts/app) (reference SPA, not published) | **AGPL-3.0-only** | Reference implementation, not for redistribution. |
+
+For the AGPL components, the AGPL network clause applies — providing a
+modified version over a network requires making the corresponding source
+available to users of that service.
 
 Third-party components retain their own licenses; see
 [THIRD_PARTY_NOTICES](THIRD_PARTY_NOTICES) and [NOTICE](NOTICE).
diff --git a/RELEASING.md b/RELEASING.md
index 3eeb47f..7fd5bcb 100644
--- a/RELEASING.md
+++ b/RELEASING.md
@@ -7,8 +7,8 @@ never collide.
 | Artifact                            | Ecosystem             | Version source            | Consumer pins with                          |
 | ----------------------------------- | --------------------- | ------------------------- | ------------------------------------------- |
 | `github.com/ForestHubAI/edge-agents/go` | Go modules            | **git tag** `go/vX.Y.Z`   | `go get ...@vX.Y.Z`                         |
-| `@foresthubai/workflow-core`        | npm (GitHub Packages) | `version` in package.json | `npm i @foresthubai/workflow-core@X.Y.Z`    |
-| `@foresthubai/workflow-builder`     | npm (GitHub Packages) | `version` in package.json | `npm i @foresthubai/workflow-builder@X.Y.Z` |
+| `@foresthubai/workflow-core`        | npm (npmjs.org)       | `version` in package.json | `npm i @foresthubai/workflow-core@X.Y.Z`    |
+| `@foresthubai/workflow-builder`     | npm (npmjs.org)       | `version` in package.json | `npm i @foresthubai/workflow-builder@X.Y.Z` |
 
 Go and TS version on **independent cadences**. The two TS packages, however, are
 **locked to each other** (see below) — they always ship one shared version.
@@ -39,33 +39,37 @@ npm run release -- 0.2.0
 
 Each package's `prepublishOnly` rebuilds `dist/` first, so you never publish stale output.
 
-### Registry: GitHub Packages
+### Registry: npmjs.org (public)
 
-Both packages carry `publishConfig.registry = https://npm.pkg.github.com`.
+Both packages carry `publishConfig.registry = https://registry.npmjs.org` and
+`publishConfig.access = public`, so the first `npm publish` ships the scoped
+`@foresthubai/*` packages as openly installable on npmjs.org. No token or
+`.npmrc` is required on the consumer side — `npm i @foresthubai/workflow-builder@X.Y.Z`
+just works.
 
-**To publish**, npm needs a GitHub token with `write:packages`, supplied via `~/.npmrc`
-(never commit it):
+**To publish**, log in once on the machine that runs the release:
 
-```
-//npm.pkg.github.com/:_authToken=$[Token with write access]
+```sh
+npm login           # interactive — uses the npmjs.org @foresthubai org account
+npm whoami          # sanity check
 ```
 
-**To consume** (e.g. the private FE repo), add `FH_PACKAGES_TOKEN` as env variable and add an `.npmrc` in consumers' root folder:
+Then from `ts/`:
 
+```sh
+npm run release -- X.Y.Z
 ```
-@foresthubai:registry=https://npm.pkg.github.com
-//npm.pkg.github.com/:_authToken=${FH_PACKAGES_TOKEN}
-```
 
-then `npm i @foresthubai/workflow-builder@X.Y.Z` as normal. See
-[`ts/workflow-builder/README.md`](ts/workflow-builder/README.md) for the Tailwind/styles
-wiring the consumer must also do.
+The release script invokes `npm publish --workspaces`, which honours each
+package's `publishConfig` and skips the private `@foresthubai/app`. Two-factor
+auth on the npm account is recommended; if enabled, `npm publish` will prompt
+for the OTP.
+
+See [`ts/workflow-builder/README.md`](ts/workflow-builder/README.md) for the
+Tailwind/styles wiring the consumer must also do.
 
 > **No automated changelog.** Put a one-line "what changed" in the release commit so the
 > FE maintainer (often future-you) can see why a pinned version moved.
->
-> **Going public** keeps the `@foresthubai` scope — you'd own that org on npmjs.com and
-> drop the GitHub Packages registry line; the package name does not change.
 
 ## Go module — manual tag
 
diff --git a/THIRD_PARTY_NOTICES b/THIRD_PARTY_NOTICES
index 05a518b..0565438 100644
--- a/THIRD_PARTY_NOTICES
+++ b/THIRD_PARTY_NOTICES
@@ -1,12 +1,17 @@
 Third-Party Software Notices
 ============================
 
-edge-agents is licensed under the GNU Affero General Public License v3.0
-(AGPL-3.0-only). The third-party components listed below are incorporated into
-or distributed with edge-agents and retain their original licenses as noted. None of
-these licenses conflict with the distribution of edge-agents under AGPL-3.0-only; the
-permissive and weak-copyleft licenses below are all one-way compatible with the
-GNU AGPL v3.
+edge-agents uses a two-tier license model:
+  - `contract/` and `ts/workflow-core/` are licensed under Apache-2.0
+  - The rest (engine, workflow-builder, app) is licensed under AGPL-3.0-only
+    or a separate commercial license
+See LICENSE, NOTICE, contract/LICENSE, and ts/workflow-core/LICENSE for details.
+
+The third-party components listed below are incorporated into or distributed
+with edge-agents and retain their original licenses as noted. None of these
+licenses conflict with the two-tier model above; the permissive and
+weak-copyleft licenses below are all one-way compatible with both Apache-2.0
+and the GNU AGPL v3.
 
 Per-license obligations satisfied here:
   * MIT / ISC / BSD-2-Clause / BSD-3-Clause / 0BSD / BlueOak-1.0.0 / Python-2.0
diff --git a/contract/LICENSE b/contract/LICENSE
new file mode 100644
index 0000000..d645695
--- /dev/null
+++ b/contract/LICENSE
@@ -0,0 +1,202 @@
+
+                                 Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+   1. Definitions.
+
+      "License" shall mean the terms and conditions for use, reproduction,
+      and distribution as defined by Sections 1 through 9 of this document.
+
+      "Licensor" shall mean the copyright owner or entity authorized by
+      the copyright owner that is granting the License.
+
+      "Legal Entity" shall mean the union of the acting entity and all
+      other entities that control, are controlled by, or are under common
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+      "control" means (i) the power, direct or indirect, to cause the
+      direction or management of such entity, whether by contract or
+      otherwise, or (ii) ownership of fifty percent (50%) or more of the
+      outstanding shares, or (iii) beneficial ownership of such entity.
+
+      "You" (or "Your") shall mean an individual or Legal Entity
+      exercising permissions granted by this License.
+
+      "Source" form shall mean the preferred form for making modifications,
+      including but not limited to software source code, documentation
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+
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+      transformation or translation of a Source form, including but
+      not limited to compiled object code, generated documentation,
+      and conversions to other media types.
+
+      "Work" shall mean the work of authorship, whether in Source or
+      Object form, made available under the License, as indicated by a
+      copyright notice that is included in or attached to the work
+      (an example is provided in the Appendix below).
+
+      "Derivative Works" shall mean any work, whether in Source or Object
+      form, that is based on (or derived from) the Work and for which the
+      editorial revisions, annotations, elaborations, or other modifications
+      represent, as a whole, an original work of authorship. For the purposes
+      of this License, Derivative Works shall not include works that remain
+      separable from, or merely link (or bind by name) to the interfaces of,
+      the Work and Derivative Works thereof.
+
+      "Contribution" shall mean any work of authorship, including
+      the original version of the Work and any modifications or additions
+      to that Work or Derivative Works thereof, that is intentionally
+      submitted to Licensor for inclusion in the Work by the copyright owner
+      or by an individual or Legal Entity authorized to submit on behalf of
+      the copyright owner. For the purposes of this definition, "submitted"
+      means any form of electronic, verbal, or written communication sent
+      to the Licensor or its representatives, including but not limited to
+      communication on electronic mailing lists, source code control systems,
+      and issue tracking systems that are managed by, or on behalf of, the
+      Licensor for the purpose of discussing and improving the Work, but
+      excluding communication that is conspicuously marked or otherwise
+      designated in writing by the copyright owner as "Not a Contribution."
+
+      "Contributor" shall mean Licensor and any individual or Legal Entity
+      on behalf of whom a Contribution has been received by Licensor and
+      subsequently incorporated within the Work.
+
+   2. Grant of Copyright License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      copyright license to reproduce, prepare Derivative Works of,
+      publicly display, publicly perform, sublicense, and distribute the
+      Work and such Derivative Works in Source or Object form.
+
+   3. Grant of Patent License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      (except as stated in this section) patent license to make, have made,
+      use, offer to sell, sell, import, and otherwise transfer the Work,
+      where such license applies only to those patent claims licensable
+      by such Contributor that are necessarily infringed by their
+      Contribution(s) alone or by combination of their Contribution(s)
+      with the Work to which such Contribution(s) was submitted. If You
+      institute patent litigation against any entity (including a
+      cross-claim or counterclaim in a lawsuit) alleging that the Work
+      or a Contribution incorporated within the Work constitutes direct
+      or contributory patent infringement, then any patent licenses
+      granted to You under this License for that Work shall terminate
+      as of the date such litigation is filed.
+
+   4. Redistribution. You may reproduce and distribute copies of the
+      Work or Derivative Works thereof in any medium, with or without
+      modifications, and in Source or Object form, provided that You
+      meet the following conditions:
+
+      (a) You must give any other recipients of the Work or
+          Derivative Works a copy of this License; and
+
+      (b) You must cause any modified files to carry prominent notices
+          stating that You changed the files; and
+
+      (c) You must retain, in the Source form of any Derivative Works
+          that You distribute, all copyright, patent, trademark, and
+          attribution notices from the Source form of the Work,
+          excluding those notices that do not pertain to any part of
+          the Derivative Works; and
+
+      (d) If the Work includes a "NOTICE" text file as part of its
+          distribution, then any Derivative Works that You distribute must
+          include a readable copy of the attribution notices contained
+          within such NOTICE file, excluding those notices that do not
+          pertain to any part of the Derivative Works, in at least one
+          of the following places: within a NOTICE text file distributed
+          as part of the Derivative Works; within the Source form or
+          documentation, if provided along with the Derivative Works; or,
+          within a display generated by the Derivative Works, if and
+          wherever such third-party notices normally appear. The contents
+          of the NOTICE file are for informational purposes only and
+          do not modify the License. You may add Your own attribution
+          notices within Derivative Works that You distribute, alongside
+          or as an addendum to the NOTICE text from the Work, provided
+          that such additional attribution notices cannot be construed
+          as modifying the License.
+
+      You may add Your own copyright statement to Your modifications and
+      may provide additional or different license terms and conditions
+      for use, reproduction, or distribution of Your modifications, or
+      for any such Derivative Works as a whole, provided Your use,
+      reproduction, and distribution of the Work otherwise complies with
+      the conditions stated in this License.
+
+   5. Submission of Contributions. Unless You explicitly state otherwise,
+      any Contribution intentionally submitted for inclusion in the Work
+      by You to the Licensor shall be under the terms and conditions of
+      this License, without any additional terms or conditions.
+      Notwithstanding the above, nothing herein shall supersede or modify
+      the terms of any separate license agreement you may have executed
+      with Licensor regarding such Contributions.
+
+   6. Trademarks. This License does not grant permission to use the trade
+      names, trademarks, service marks, or product names of the Licensor,
+      except as required for reasonable and customary use in describing the
+      origin of the Work and reproducing the content of the NOTICE file.
+
+   7. Disclaimer of Warranty. Unless required by applicable law or
+      agreed to in writing, Licensor provides the Work (and each
+      Contributor provides its Contributions) on an "AS IS" BASIS,
+      WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+      implied, including, without limitation, any warranties or conditions
+      of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
+      PARTICULAR PURPOSE. You are solely responsible for determining the
+      appropriateness of using or redistributing the Work and assume any
+      risks associated with Your exercise of permissions under this License.
+
+   8. Limitation of Liability. In no event and under no legal theory,
+      whether in tort (including negligence), contract, or otherwise,
+      unless required by applicable law (such as deliberate and grossly
+      negligent acts) or agreed to in writing, shall any Contributor be
+      liable to You for damages, including any direct, indirect, special,
+      incidental, or consequential damages of any character arising as a
+      result of this License or out of the use or inability to use the
+      Work (including but not limited to damages for loss of goodwill,
+      work stoppage, computer failure or malfunction, or any and all
+      other commercial damages or losses), even if such Contributor
+      has been advised of the possibility of such damages.
+
+   9. Accepting Warranty or Additional Liability. While redistributing
+      the Work or Derivative Works thereof, You may choose to offer,
+      and charge a fee for, acceptance of support, warranty, indemnity,
+      or other liability obligations and/or rights consistent with this
+      License. However, in accepting such obligations, You may act only
+      on Your own behalf and on Your sole responsibility, not on behalf
+      of any other Contributor, and only if You agree to indemnify,
+      defend, and hold each Contributor harmless for any liability
+      incurred by, or claims asserted against, such Contributor by reason
+      of your accepting any such warranty or additional liability.
+
+   END OF TERMS AND CONDITIONS
+
+   APPENDIX: How to apply the Apache License to your work.
+
+      To apply the Apache License to your work, attach the following
+      boilerplate notice, with the fields enclosed by brackets "[]"
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+      file or class name and description of purpose be included on the
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+
+   Copyright [yyyy] [name of copyright owner]
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
diff --git a/contract/NOTICE b/contract/NOTICE
new file mode 100644
index 0000000..b89b83b
--- /dev/null
+++ b/contract/NOTICE
@@ -0,0 +1,14 @@
+edge-agents/contract
+Copyright (c) 2026 ForestHub. All rights reserved.
+
+This product includes software developed by
+ForestHub (https://foresthub.ai).
+
+The contract/ directory contains OpenAPI 3.0.3 schemas that define the
+wire format of the edge-agents platform. This directory is licensed under
+the Apache License, Version 2.0, while the rest of the repository (the
+engine, the React workflow builder, and the TypeScript workflow-builder
+package) is licensed under AGPL-3.0 or a separate commercial license.
+
+See the repository LICENSE for AGPL terms and contract/LICENSE for the
+Apache terms applicable to this subdirectory.
diff --git a/go/.golangci.yml b/go/.golangci.yml
new file mode 100644
index 0000000..93d3df3
--- /dev/null
+++ b/go/.golangci.yml
@@ -0,0 +1,47 @@
+# golangci-lint config — sensible defaults for the edge-agents Go module.
+# See https://golangci-lint.run/usage/configuration/
+
+run:
+  timeout: 5m
+  # Generated files are skipped by linters that respect generation markers,
+  # but be explicit for the oapi-codegen output.
+  build-tags: []
+
+issues:
+  exclude-dirs:
+    - api  # generated oapi-codegen output (types.gen.go, server.gen.go)
+  exclude-rules:
+    # Test files often have legitimate uses of patterns gosec flags.
+    - path: _test\.go
+      linters:
+        - gosec
+        - errcheck
+  max-issues-per-linter: 0
+  max-same-issues: 0
+
+linters:
+  disable-all: true
+  enable:
+    - govet
+    - errcheck
+    - staticcheck
+    - ineffassign
+    - unused
+    - gosimple
+    - gosec
+
+linters-settings:
+  gosec:
+    excludes:
+      # Noisy / low-signal for this codebase:
+      - G104  # errors unhandled (errcheck covers this with better context)
+      - G304  # file path provided as taint input (legitimate config loading)
+      - G404  # weak random (we don't do crypto in engine paths)
+  errcheck:
+    check-type-assertions: false
+    check-blank: false
+  govet:
+    enable-all: true
+    disable:
+      - fieldalignment  # too noisy for general code
+      - shadow          # too noisy with err re-use
diff --git a/go/cmd/engine/server.go b/go/cmd/engine/server.go
index c42f5f2..03e4cb0 100644
--- a/go/cmd/engine/server.go
+++ b/go/cmd/engine/server.go
@@ -2,6 +2,7 @@ package main
 
 import (
 	"context"
+	"crypto/subtle"
 	"net/http"
 
 	"github.com/ForestHubAI/edge-agents/go/api/engineapi"
@@ -50,11 +51,25 @@ func (s *strictServer) Stop(_ context.Context, _ engineapi.StopRequestObject) (e
 
 // AuthMiddleware is a strict-handler middleware enforcing the shared agent
 // secret as a bearer token on every operation. An empty configured secret
-// rejects all requests.
+// rejects all requests. The token comparison uses crypto/subtle to avoid
+// leaking the secret through response-time side channels.
+//
+// The Healthz operation is exempted so that container-orchestrator
+// readiness/liveness probes (k8s, compose, ECS) can hit /healthz without
+// being issued the shared secret. The handler discloses only "is the
+// runner attached" — no workflow content, no node state.
 func AuthMiddleware(secret string) engineapi.StrictMiddlewareFunc {
-	return func(f engineapi.StrictHandlerFunc, _ string) engineapi.StrictHandlerFunc {
+	want := []byte("Bearer " + secret)
+	return func(f engineapi.StrictHandlerFunc, operationID string) engineapi.StrictHandlerFunc {
+		if operationID == "Healthz" {
+			return f
+		}
 		return func(ctx context.Context, w http.ResponseWriter, r *http.Request, request interface{}) (interface{}, error) {
-			if secret == "" || r.Header.Get("Authorization") != "Bearer "+secret {
+			got := []byte(r.Header.Get("Authorization"))
+			// Length differs => unauthorized. Length is not secret, so an
+			// early return here does not weaken the constant-time check;
+			// ConstantTimeCompare itself rejects unequal-length inputs.
+			if secret == "" || len(got) != len(want) || subtle.ConstantTimeCompare(got, want) != 1 {
 				http.Error(w, "unauthorized", http.StatusUnauthorized)
 				return nil, nil
 			}
diff --git a/go/cmd/engine/server_test.go b/go/cmd/engine/server_test.go
new file mode 100644
index 0000000..9ada035
--- /dev/null
+++ b/go/cmd/engine/server_test.go
@@ -0,0 +1,115 @@
+package main
+
+import (
+	"context"
+	"net/http"
+	"net/http/httptest"
+	"testing"
+
+	"github.com/ForestHubAI/edge-agents/go/api/engineapi"
+	"github.com/stretchr/testify/assert"
+)
+
+// okHandler is a no-op StrictHandlerFunc used to detect whether the
+// AuthMiddleware passed the request through (handler called) or rejected it
+// (handler not called, 401 written by the middleware).
+func okHandler(called *bool) engineapi.StrictHandlerFunc {
+	return func(_ context.Context, w http.ResponseWriter, _ *http.Request, _ interface{}) (interface{}, error) {
+		*called = true
+		w.WriteHeader(http.StatusOK)
+		return nil, nil
+	}
+}
+
+func TestAuthMiddleware_RejectsBadBearer(t *testing.T) {
+	mw := AuthMiddleware("s3cret")
+	called := false
+	handler := mw(okHandler(&called), "Deploy")
+
+	req := httptest.NewRequest(http.MethodPost, "/deploy", nil)
+	req.Header.Set("Authorization", "Bearer wrong")
+	rec := httptest.NewRecorder()
+
+	_, err := handler(req.Context(), rec, req, nil)
+	assert.NoError(t, err)
+	assert.Equal(t, http.StatusUnauthorized, rec.Code)
+	assert.False(t, called, "downstream handler must not run on bad bearer")
+}
+
+func TestAuthMiddleware_RejectsMissingHeader(t *testing.T) {
+	mw := AuthMiddleware("s3cret")
+	called := false
+	handler := mw(okHandler(&called), "Deploy")
+
+	req := httptest.NewRequest(http.MethodPost, "/deploy", nil)
+	rec := httptest.NewRecorder()
+
+	_, err := handler(req.Context(), rec, req, nil)
+	assert.NoError(t, err)
+	assert.Equal(t, http.StatusUnauthorized, rec.Code)
+	assert.False(t, called)
+}
+
+func TestAuthMiddleware_RejectsEmptyConfiguredSecret(t *testing.T) {
+	mw := AuthMiddleware("")
+	called := false
+	handler := mw(okHandler(&called), "Deploy")
+
+	req := httptest.NewRequest(http.MethodPost, "/deploy", nil)
+	req.Header.Set("Authorization", "Bearer ")
+	rec := httptest.NewRecorder()
+
+	_, err := handler(req.Context(), rec, req, nil)
+	assert.NoError(t, err)
+	assert.Equal(t, http.StatusUnauthorized, rec.Code)
+	assert.False(t, called)
+}
+
+func TestAuthMiddleware_HealthzBypassesAuth(t *testing.T) {
+	mw := AuthMiddleware("s3cret")
+	called := false
+	// Pass operationID="Healthz" — the middleware must let this through
+	// without checking the Authorization header so that container
+	// orchestrators can probe readiness without the shared secret.
+	handler := mw(okHandler(&called), "Healthz")
+
+	req := httptest.NewRequest(http.MethodGet, "/healthz", nil)
+	// Deliberately no Authorization header.
+	rec := httptest.NewRecorder()
+
+	_, err := handler(req.Context(), rec, req, nil)
+	assert.NoError(t, err)
+	assert.Equal(t, http.StatusOK, rec.Code)
+	assert.True(t, called, "Healthz must reach the downstream handler unauthenticated")
+}
+
+func TestAuthMiddleware_HealthzBypassesEvenWithEmptySecret(t *testing.T) {
+	// Empty secret normally rejects every request. Healthz must still be
+	// reachable so a misconfigured engine can be diagnosed via the probe.
+	mw := AuthMiddleware("")
+	called := false
+	handler := mw(okHandler(&called), "Healthz")
+
+	req := httptest.NewRequest(http.MethodGet, "/healthz", nil)
+	rec := httptest.NewRecorder()
+
+	_, err := handler(req.Context(), rec, req, nil)
+	assert.NoError(t, err)
+	assert.Equal(t, http.StatusOK, rec.Code)
+	assert.True(t, called)
+}
+
+func TestAuthMiddleware_AcceptsCorrectBearer(t *testing.T) {
+	mw := AuthMiddleware("s3cret")
+	called := false
+	handler := mw(okHandler(&called), "Deploy")
+
+	req := httptest.NewRequest(http.MethodPost, "/deploy", nil)
+	req.Header.Set("Authorization", "Bearer s3cret")
+	rec := httptest.NewRecorder()
+
+	_, err := handler(req.Context(), rec, req, nil)
+	assert.NoError(t, err)
+	assert.Equal(t, http.StatusOK, rec.Code)
+	assert.True(t, called)
+}
diff --git a/go/cmd/fh-agent/README.md b/go/cmd/fh-agent/README.md
new file mode 100644
index 0000000..b08d97a
--- /dev/null
+++ b/go/cmd/fh-agent/README.md
@@ -0,0 +1,162 @@
+# fh-agent
+
+Compile a `site.spec.yaml` into a deploy-ready edge-agent bundle for
+Raspberry Pi, NVIDIA Jetson, x86 NUC, ST STM32MP25, or Bosch Rexroth
+ctrlX CORE.
+
+Mental model: this is a **compiler** for edge-AI sites. Source is
+`site.spec.yaml`; target is a Docker Compose stack you `scp` to a device
+and `docker compose up`.
+
+```
+site.spec.yaml  ─ plan ─▶  build/  ─ validate ─▶  build/  ─ build ─▶  dist/<name>/
+   (durable)         (compiled graph,                 (cross-checks)       (compose
+                      mapping, manifest,                                     stack)
+                      local-models)
+```
+
+## Install
+
+```sh
+cd go
+go install ./cmd/fh-agent
+```
+
+## The four passes
+
+| Pass | Reads | Writes | Network? | Determ? |
+| --- | --- | --- | --- | --- |
+| `spec`     | site.spec.yaml          | (echo + lint) | no | — |
+| `plan`     | site.spec.yaml + target | build/        | no | **yes** |
+| `validate` | build/                  | diagnostics   | no | yes |
+| `build`    | build/                  | dist/\<name\>/ | no | yes |
+
+`plan` is the heart. It MUST be byte-deterministic for the same spec +
+target — otherwise an iterating agent sees diff noise. Stable node ids
+(SHA256 of `name|type|disc`), sorted keys, no timestamps.
+
+## Subcommands
+
+### Authoring
+
+- `fh-agent spec init [--out site.spec.yaml]` — emit a commented template
+- `fh-agent spec schema [--json]` — emit JSON Schema (draft 2020-12) for
+  programmatic priming of an LLM agent
+- `fh-agent spec validate <spec.yaml>` — required fields, dangling refs,
+  bus/device consistency
+
+### Introspection (the CLI doubles as docs for agents)
+
+- `fh-agent targets list` — embedded hardware profiles
+- `fh-agent targets describe <id>` — RAM, GPIO/serial map, supported SLMs
+  with estimated tok/s
+- `fh-agent capabilities` — bus types, device kinds, LLM capabilities
+- `fh-agent models suggest --target <id> --capability <cap>` — best-fit
+  models for the target, RAM-filtered, sorted by smallest fit
+
+### Compilation
+
+- `fh-agent plan <spec.yaml> --target <id> [--out build/]`
+- `fh-agent validate <build-dir>`
+- `fh-agent build <build-dir> --name <site-name> [--out dist/] [--tar]`
+
+## Hardware targets (v1)
+
+| ID | Arch | RAM | Accel | Notes |
+| --- | --- | --- | --- | --- |
+| `rpi5-8gb` | arm64 | 8 GB | none | General-purpose SBC |
+| `jetson-orin-nano-8gb` | arm64 | 8 GB | CUDA (40 TOPS) | Vision-language / 7B models |
+| `x86-nuc-16gb` | amd64 | 16 GB | Iris Xe iGPU | RAG / heavy reasoning |
+| `stm32mp25-1gb` | arm64 | 1 GB | Neural-ART NPU | Sensor fusion + classification |
+| `ctrlx-core-arm64` | arm64 | 2 GB | i.MX 8M Plus NPU | Industrial controller, ctrlX OS |
+
+Profiles live in `targets/*.yaml` and are embedded into the binary. Edit
+those files to add models, change estimates, or add targets.
+
+## Bundle layout
+
+```
+dist/<name>/
+  compose.yml              # engine + llama-server + (optional) mosquitto
+  agent.workflow.json      # binding-free graph
+  site.mapping.json        # channels → platform resources
+  site.resources.yaml      # mqtt brokers etc.
+  device.manifest.json     # gpios/serials of this device
+  local-models.yaml        # local SLM registry
+  bundle.meta.json         # fh-agent metadata
+  .env.example             # API-key template
+  models/                  # weights live here (download separately)
+  README.md                # auto-generated, run instructions
+```
+
+## How an agent uses this
+
+```
+$ fh-agent spec init --out site.spec.yaml
+$ fh-agent spec schema --json                  # prime on the format
+# (agent interviews user, edits site.spec.yaml)
+$ fh-agent spec validate site.spec.yaml        # exit 1 + JSON diags
+# (agent fixes)
+$ fh-agent targets list --json
+$ fh-agent targets describe rpi5-8gb --json    # RAM, SLMs available
+$ fh-agent plan site.spec.yaml --target rpi5-8gb --out build/
+$ fh-agent validate build/
+$ fh-agent build build/ --name muellers-haus --tar
+# → dist/muellers-haus/ + dist/muellers-haus.tar.gz
+```
+
+## Output contract for agents
+
+- **All commands emit JSON** on stdout when `--json` (default for
+  introspection/diagnostic commands). Status messages go to stderr.
+- **Diagnostics shape** is identical across commands:
+  ```json
+  {"severity": "error|warn|info", "category": "spec|plan|validate|build",
+   "message": "...", "location": "$.devices[2].bus.topic", "nodeId": "..."}
+  ```
+- **Exit codes**:
+  - `0`  ok
+  - `1`  diagnostics (user-correctable)
+  - `2`  infrastructure (IO error, embedded data corrupted)
+  - `64` usage error
+- **Stable output**: same spec + target ⇒ byte-identical artifacts. Map
+  keys sorted, node ids hashed from inputs, no timestamps.
+
+## Contract-schema validation
+
+`fh-agent validate` shells out to `fh-builder validate --json` (the
+TypeScript CLI in `ts/app/`) to check the generated workflow against
+`contract/workflow.yaml`. The diagnostics merge into the same JSON array
+fh-agent's own cross-checks emit.
+
+To enable, build workflow-core and link fh-builder once:
+
+```sh
+cd ts
+npm ci
+npm run -w @foresthubai/workflow-core build
+cd app && npm link
+```
+
+If `fh-builder` is not in PATH, `fh-agent validate` emits a single warn
+diagnostic and continues — the tool stays usable offline. Pass
+`--skip-workflow-check` to silence it.
+
+## v1 known limits (documented; not bugs)
+
+- **Bus types** in spec: `mqtt`, `gpio`, `serial`. I2C, SPI, HTTP, and
+  ctrlX Data-Layer adapters are deferred.
+- **No provisioning, no OTA, no HIL**. v1 stops at the bundle. v2 adds
+  `fh-agent deploy --to pi@host`.
+- **Model weights** are not downloaded — `models/` is empty; the README
+  in the bundle has a hint pointing at Hugging Face for common models.
+
+## Testing
+
+```sh
+go test ./cmd/fh-agent/...
+```
+
+Three suites: determinism (same input → same bytes across all 5
+targets), target-fit (chosen model fits target RAM), and validate
+catches a mangled bundle.
diff --git a/go/cmd/fh-agent/ROADMAP.md b/go/cmd/fh-agent/ROADMAP.md
new file mode 100644
index 0000000..10a2086
--- /dev/null
+++ b/go/cmd/fh-agent/ROADMAP.md
@@ -0,0 +1,76 @@
+# fh-agent roadmap
+
+The plan for the CLI that turns a `site.spec.yaml` into a deployable
+edge-agent bundle. Owned by this directory; updated when scope changes.
+
+## Principles
+
+- **Compiler model, not orchestrator.** Source = spec + target; output =
+  bundle. The CLI does not run the agent or hold state.
+- **Deterministic.** Same inputs ⇒ byte-identical outputs. Agents diff
+  outputs across runs to detect progress.
+- **JSON-first.** Every diagnostic and listing is machine-readable.
+- **No interactive prompts.** Agents drive this thing.
+- **Resilient.** Optional tools (fh-builder, docker) degrade to a warn —
+  the binary stays usable on a customer device with nothing but glibc.
+
+## Shipped
+
+### v1.0 — `site.spec.yaml` → deployable bundle (commit `b4a3150`)
+
+- Four-phase pipeline: `spec` / `plan` / `validate` / `build`
+- 5 embedded hardware target profiles
+  (`rpi5-8gb`, `jetson-orin-nano-8gb`, `x86-nuc-16gb`, `stm32mp25-1gb`,
+  `ctrlx-core-arm64`)
+- Spec schema + JSON-Schema export for agent self-priming
+- Deterministic plan compile (hashed node ids, sorted keys)
+- Model auto-selection (capability ∩ RAM fit) per target
+- Compose-stack bundle: official engine image + llama-server sidecar
+  + optional mosquitto + configs + auto-README + `.env.example` +
+  optional `.tar.gz`
+- Cross-validation: channels ↔ mapping ↔ resources ↔ manifest
+- Go-side tests: determinism on all 5 targets, RAM-fit, mangle-catch
+
+### v1.1 — Contract-schema validation (commit `0fb4ef9`)
+
+- `fh-builder validate --json` (TS) emits machine-readable diagnostics
+- Subprocess integration in `fh-agent validate`; warn-fallback if
+  `fh-builder` is missing
+- Plan fixes uncovered by the new check (Ticker units, pinReference,
+  agentTask edge `prompt`, expression literal defaults)
+
+## Open — v1.x (hardening, small surface)
+
+Ordered by ratio of (value / effort). Pick from the top.
+
+| | Why it matters | Sketch |
+| --- | --- | --- |
+| **Real-device smoke test on a Pi5** | Every v1 guarantee is theoretical until one bundle has actually booted on real hardware. | Take the muellers-haus example, scp, `docker compose up`, attach a fake MQTT publisher, watch the agent loop. |
+| **CI: `go test ./cmd/fh-agent/...`** | Determinism + RAM-fit + validate-catch already exist as tests; just wire them into `.github/workflows/`. | Add a step to the existing CI workflow file. |
+| **Claude skill wrapper in `skills/agent-build/`** | Makes the CLI discoverable to Claude Code (mirrors how `workflow-validate` wraps `fh-workflow validate`). | One `SKILL.md`, points at `fh-agent plan / validate / build`. |
+| **`fh-agent doctor`** | Pre-flight check on the bundle host: engine reachable, llm endpoint up, GPIO permissions, model file present. Saves support roundtrips. | New subcommand; reuses `loadMetadata` + a few `http.Get` / `os.Stat`. |
+| **Model-download helper** | Today `models/` ships empty and the README points at Hugging Face manually. Either an init-container in the compose stack, or `fh-agent build --pull-model`. | Curated GGUF URL table per target catalog; SHA verification. |
+| **Spec-schema JSON publishable** | The schema export is the primary primer for an external Claude agent. Ship it as a versioned URL (e.g. `https://schemas.foresthub.ai/site.spec.v1.json`) so prompts can reference it stably. | Wire `fh-agent spec schema` into a build artifact, host on cloudflare. |
+
+## Open — v2 (new phases, bigger scope)
+
+| Phase | What it unlocks |
+| --- | --- |
+| **`fh-agent deploy --to pi@host`** | Closes the manual gap between bundle and running agent. SSH/scp or Balena, then `docker compose up` remotely. Bring-your-own-key auth. |
+| **HIL test harness** | `scenarios.test.yaml` + a runner that publishes synthetic MQTT events, waits, asserts on actuator topics. Safety-critical for buildings (heating must not switch off). The skeleton file already ships in v1 bundles. |
+| **Bus-type expansion: I2C / SPI / HTTP / ctrlX Data-Layer** | Unlocks STM32MP25 ADC/DAC and full ctrlX CORE use-cases. Requires matching channel types in `contract/workflow.yaml`. |
+| **Constraint enforcement** | Today, `constraints[]` flow into the agent prompt as text. v2 generates structural guards (`If` nodes with min/max) in front of each `WritePin` / `MqttPublish` so the agent *can't* violate them. |
+| **Diff-deploy / OTA** | Spec edit ⇒ only the delta is pushed to the engine. Needs `fh-backend` and engine versioning protocol. |
+| **Vision + function-call capabilities** | Real tool schemas (not just descriptions), vision-language models for camera-fed sensors. New target capability flags. |
+| **More targets** | Variscite VAR-SOM, Toradex Verdin, Siemens IPC, BeagleY-AI. Each is a single YAML in `targets/`. |
+
+## Out of scope
+
+Intentionally not in this CLI — belongs elsewhere:
+
+- **Workflow editing UI** — that is `fh-builder open`.
+- **Multi-tenant control plane** — `fh-backend`, closed source.
+- **Agent runtime tracing** — engine emits structured logs; consume them
+  from `fh-backend` or a Grafana dashboard, not from this CLI.
+- **Natural-language → spec generation** — that is the agent's job. The
+  CLI compiles what the agent produced.
diff --git a/go/cmd/fh-agent/bundle.go b/go/cmd/fh-agent/bundle.go
new file mode 100644
index 0000000..38f96dc
--- /dev/null
+++ b/go/cmd/fh-agent/bundle.go
@@ -0,0 +1,281 @@
+package main
+
+import (
+	"archive/tar"
+	"compress/gzip"
+	"embed"
+	"encoding/json"
+	"flag"
+	"fmt"
+	"io"
+	"os"
+	"path/filepath"
+	"strings"
+	"text/template"
+)
+
+//go:embed templates/*.tmpl
+var tmplFS embed.FS
+
+// runBuild assembles a deployable bundle directory from a planned build/.
+// Renders compose.yml + README.md + .env.example from templates, copies the
+// build artifacts in place, optionally tars the result.
+func runBuild(args []string) {
+	fs := flag.NewFlagSet("build", flag.ExitOnError)
+	name := fs.String("name", "", "site/bundle name (used as dist subdirectory)")
+	out := fs.String("out", "dist", "dist directory")
+	tarOut := fs.Bool("tar", false, "additionally write a .tar.gz of the bundle next to it")
+	pos := parseMixed(fs, args)
+	if len(pos) < 1 {
+		die(exitUsage, "usage: fh-agent build <build-dir> --name <site-name> [--out dist/] [--tar]")
+	}
+	if *name == "" {
+		die(exitUsage, "--name is required")
+	}
+	buildDir := pos[0]
+
+	meta, mdiags := loadMetadata(filepath.Join(buildDir, "bundle.meta.json"))
+	if hasError(mdiags) {
+		emitDiags(os.Stderr, mdiags)
+		os.Exit(exitDiagnostics)
+	}
+
+	target, err := getTarget(meta.TargetID)
+	if err != nil {
+		die(exitDiagnostics, "%v", err)
+	}
+
+	// Inspect workflow to decide which sidecars compose needs.
+	wf, wfdiags := loadWorkflow(filepath.Join(buildDir, "agent.workflow.json"))
+	if hasError(wfdiags) {
+		emitDiags(os.Stderr, wfdiags)
+		os.Exit(exitDiagnostics)
+	}
+	needs := inspectWorkflowNeeds(wf)
+
+	bundleDir := filepath.Join(*out, *name)
+	if err := os.MkdirAll(bundleDir, 0o755); err != nil {
+		die(exitInfra, "mkdir %s: %v", bundleDir, err)
+	}
+
+	// 1. Copy generated artifacts as-is.
+	artifacts := []string{
+		"agent.workflow.json",
+		"site.mapping.json",
+		"site.resources.yaml",
+		"device.manifest.json",
+		"local-models.yaml",
+		"bundle.meta.json",
+	}
+	for _, f := range artifacts {
+		src := filepath.Join(buildDir, f)
+		dst := filepath.Join(bundleDir, f)
+		if err := copyFile(src, dst); err != nil {
+			die(exitInfra, "copy %s: %v", f, err)
+		}
+	}
+
+	// 2. Render compose.yml, README.md, .env.example from templates.
+	ctx := composeContext{
+		Name:              *name,
+		Arch:              target.Arch,
+		TargetID:          target.ID,
+		TargetArch:        target.Arch,
+		AccelType:         target.Accel.Type,
+		AccelDevice:       target.Accel.Device,
+		SLMImage:          target.SLMRuntime.Image,
+		SLMPort:           target.SLMRuntime.ServePort,
+		GPURequest:        target.SLMRuntime.GPURequest,
+		ModelID:           meta.ChosenModel.ID,
+		ModelRAMMB:        meta.ChosenModel.RAMMB,
+		ModelDownloadHint: modelDownloadHint(meta.ChosenModel.ID),
+		NeedsGPIO:         needs.gpio,
+		NeedsSerial:       needs.serial,
+		NeedsMQTT:         needs.mqtt,
+	}
+	if err := renderTemplate("templates/compose.yml.tmpl", filepath.Join(bundleDir, "compose.yml"), ctx); err != nil {
+		die(exitInfra, "render compose.yml: %v", err)
+	}
+	if err := renderTemplate("templates/readme.md.tmpl", filepath.Join(bundleDir, "README.md"), ctx); err != nil {
+		die(exitInfra, "render README.md: %v", err)
+	}
+	if err := renderTemplate("templates/env.example.tmpl", filepath.Join(bundleDir, ".env.example"), ctx); err != nil {
+		die(exitInfra, "render .env.example: %v", err)
+	}
+	if needs.mqtt {
+		if err := renderTemplate("templates/mosquitto.conf.tmpl", filepath.Join(bundleDir, "mosquitto.conf"), ctx); err != nil {
+			die(exitInfra, "render mosquitto.conf: %v", err)
+		}
+	}
+	if err := os.MkdirAll(filepath.Join(bundleDir, "models"), 0o755); err != nil {
+		die(exitInfra, "mkdir models/: %v", err)
+	}
+	keepPath := filepath.Join(bundleDir, "models", ".gitkeep")
+	_ = os.WriteFile(keepPath, []byte{}, 0o644)
+
+	fmt.Fprintf(os.Stderr, "built bundle at %s\n", bundleDir)
+
+	if *tarOut {
+		tarPath := bundleDir + ".tar.gz"
+		if err := tarGz(bundleDir, tarPath); err != nil {
+			die(exitInfra, "tar: %v", err)
+		}
+		fmt.Fprintf(os.Stderr, "wrote %s\n", tarPath)
+	}
+
+	// Echo summary on stdout as JSON so an agent can parse it.
+	summary := map[string]any{
+		"bundleDir":  bundleDir,
+		"name":       *name,
+		"target":     target.ID,
+		"arch":       target.Arch,
+		"model":      meta.ChosenModel.ID,
+		"sidecars":   sidecarList(needs),
+		"tar":        *tarOut,
+	}
+	enc := json.NewEncoder(os.Stdout)
+	enc.SetIndent("", "  ")
+	enc.SetEscapeHTML(false)
+	_ = enc.Encode(summary)
+}
+
+type composeContext struct {
+	Name              string
+	Arch              string
+	TargetID          string
+	TargetArch        string
+	AccelType         string
+	AccelDevice       string
+	SLMImage          string
+	SLMPort           int
+	GPURequest        string
+	ModelID           string
+	ModelRAMMB        int
+	ModelDownloadHint string
+	NeedsGPIO         bool
+	NeedsSerial       bool
+	NeedsMQTT         bool
+}
+
+type workflowNeeds struct {
+	gpio, serial, mqtt bool
+}
+
+func inspectWorkflowNeeds(wf Workflow) workflowNeeds {
+	var n workflowNeeds
+	for _, ch := range wf.Channels {
+		switch ch["type"] {
+		case "GPIOIN", "GPIOOUT", "PWM", "ADC", "DAC":
+			n.gpio = true
+		case "UART":
+			n.serial = true
+		case "MQTT":
+			n.mqtt = true
+		}
+	}
+	return n
+}
+
+func sidecarList(n workflowNeeds) []string {
+	out := []string{"engine", "llm"}
+	if n.mqtt {
+		out = append(out, "mosquitto")
+	}
+	return out
+}
+
+// modelDownloadHint returns a best-guess pointer for where to fetch the
+// model weights. Best-effort only — a curated registry is a v2 improvement.
+func modelDownloadHint(id string) string {
+	id = strings.ToLower(id)
+	switch {
+	case strings.Contains(id, "llama-3.2-1b"):
+		return "huggingface.co/lmstudio-community/Llama-3.2-1B-Instruct-GGUF"
+	case strings.Contains(id, "llama-3.2-3b"):
+		return "huggingface.co/lmstudio-community/Llama-3.2-3B-Instruct-GGUF"
+	case strings.Contains(id, "llama-3.1-8b"):
+		return "huggingface.co/lmstudio-community/Meta-Llama-3.1-8B-Instruct-GGUF"
+	case strings.Contains(id, "qwen2.5"):
+		return "huggingface.co/Qwen/Qwen2.5-7B-Instruct-GGUF"
+	case strings.Contains(id, "tinyllama"):
+		return "huggingface.co/TheBloke/TinyLlama-1.1B-Chat-v1.0-GGUF"
+	case strings.Contains(id, "nomic-embed"):
+		return "huggingface.co/nomic-ai/nomic-embed-text-v1.5-GGUF"
+	}
+	return ""
+}
+
+func renderTemplate(srcRel, dst string, ctx any) error {
+	raw, err := tmplFS.ReadFile(srcRel)
+	if err != nil {
+		return fmt.Errorf("read template %s: %w", srcRel, err)
+	}
+	t, err := template.New(filepath.Base(srcRel)).Parse(string(raw))
+	if err != nil {
+		return fmt.Errorf("parse template %s: %w", srcRel, err)
+	}
+	f, err := os.Create(dst)
+	if err != nil {
+		return fmt.Errorf("create %s: %w", dst, err)
+	}
+	defer f.Close()
+	if err := t.Execute(f, ctx); err != nil {
+		return fmt.Errorf("execute template %s: %w", srcRel, err)
+	}
+	return nil
+}
+
+func copyFile(src, dst string) error {
+	in, err := os.Open(src)
+	if err != nil {
+		return err
+	}
+	defer in.Close()
+	out, err := os.Create(dst)
+	if err != nil {
+		return err
+	}
+	defer out.Close()
+	_, err = io.Copy(out, in)
+	return err
+}
+
+func tarGz(srcDir, dstPath string) error {
+	out, err := os.Create(dstPath)
+	if err != nil {
+		return err
+	}
+	defer out.Close()
+	gz := gzip.NewWriter(out)
+	defer gz.Close()
+	tw := tar.NewWriter(gz)
+	defer tw.Close()
+
+	root := filepath.Clean(srcDir)
+	base := filepath.Base(root)
+	return filepath.Walk(root, func(path string, info os.FileInfo, err error) error {
+		if err != nil {
+			return err
+		}
+		rel, _ := filepath.Rel(root, path)
+		hdr, err := tar.FileInfoHeader(info, "")
+		if err != nil {
+			return err
+		}
+		hdr.Name = filepath.Join(base, rel)
+		if err := tw.WriteHeader(hdr); err != nil {
+			return err
+		}
+		if info.Mode().IsRegular() {
+			f, err := os.Open(path)
+			if err != nil {
+				return err
+			}
+			defer f.Close()
+			if _, err := io.Copy(tw, f); err != nil {
+				return err
+			}
+		}
+		return nil
+	})
+}
diff --git a/go/cmd/fh-agent/diag.go b/go/cmd/fh-agent/diag.go
new file mode 100644
index 0000000..f339f7d
--- /dev/null
+++ b/go/cmd/fh-agent/diag.go
@@ -0,0 +1,53 @@
+package main
+
+import (
+	"encoding/json"
+	"fmt"
+	"io"
+	"os"
+)
+
+// Diagnostic is the structured-error shape every fh-agent subcommand emits.
+// Same fields, same JSON tags as fh-workflow validate, so agents only need
+// one parser across the whole CLI surface.
+type Diagnostic struct {
+	Severity string `json:"severity"` // error | warn | info
+	Category string `json:"category"` // spec | plan | validate | build
+	Message  string `json:"message"`
+	Location string `json:"location,omitempty"` // JSONPath into the offending file
+	NodeID   string `json:"nodeId,omitempty"`   // workflow node id when relevant
+}
+
+// hasError returns true if any diagnostic is severity=error.
+func hasError(ds []Diagnostic) bool {
+	for _, d := range ds {
+		if d.Severity == "error" {
+			return true
+		}
+	}
+	return false
+}
+
+// emitDiags writes diagnostics as a JSON array on stderr. Caller picks the
+// exit code — usually 1 if hasError, 0 otherwise.
+func emitDiags(w io.Writer, ds []Diagnostic) {
+	if ds == nil {
+		ds = []Diagnostic{}
+	}
+	buf, _ := json.MarshalIndent(ds, "", "  ")
+	fmt.Fprintln(w, string(buf))
+}
+
+// Exit codes are part of the CLI contract — agents key off them. Document
+// any change in the README.
+const (
+	exitOK          = 0
+	exitDiagnostics = 1 // user-correctable: spec error, validation finding
+	exitInfra       = 2 // engine unreachable, missing toolchain, IO failure
+	exitUsage       = 64
+)
+
+func die(code int, format string, args ...any) {
+	fmt.Fprintf(os.Stderr, format+"\n", args...)
+	os.Exit(code)
+}
diff --git a/go/cmd/fh-agent/examples/building-automation.site.yaml b/go/cmd/fh-agent/examples/building-automation.site.yaml
new file mode 100644
index 0000000..e917263
--- /dev/null
+++ b/go/cmd/fh-agent/examples/building-automation.site.yaml
@@ -0,0 +1,90 @@
+schemaVersion: 1
+name: muellers-haus
+target: rpi5-8gb
+description: |
+  Single-family home, 2 zones. MQTT broker on local network exposes
+  temperature sensors and a heating-setpoint topic. One GPIO line drives a
+  hallway light.
+
+goals:
+  - id: comfort
+    description: Keep occupied rooms comfortable.
+  - id: energy
+    description: Reduce energy use when nobody is around.
+
+constraints:
+  - id: heating-min
+    description: Heating setpoint must never drop below 5 °C (frost protection).
+  - id: heating-max
+    description: Heating setpoint must never exceed 24 °C.
+
+zones:
+  - id: livingroom
+    name: Wohnzimmer
+  - id: bedroom
+    name: Schlafzimmer
+
+buses:
+  - id: home-mqtt
+    type: mqtt
+    brokerUrl: tcp://localhost:1883
+  - id: gpio
+    type: gpio
+
+devices:
+  - id: temp-livingroom
+    zone: livingroom
+    kind: sensor
+    measures: temperature
+    unit: C
+    bus:
+      ref: home-mqtt
+      topic: home/livingroom/temperature
+  - id: temp-bedroom
+    zone: bedroom
+    kind: sensor
+    measures: temperature
+    unit: C
+    bus:
+      ref: home-mqtt
+      topic: home/bedroom/temperature
+  - id: presence-livingroom
+    zone: livingroom
+    kind: sensor
+    measures: presence
+    bus:
+      ref: home-mqtt
+      topic: home/livingroom/presence
+  - id: heating-livingroom
+    zone: livingroom
+    kind: actuator
+    controls: heating
+    unit: C
+    bus:
+      ref: home-mqtt
+      topic: home/livingroom/heating/setpoint
+      writable: true
+  - id: heating-bedroom
+    zone: bedroom
+    kind: actuator
+    controls: heating
+    unit: C
+    bus:
+      ref: home-mqtt
+      topic: home/bedroom/heating/setpoint
+      writable: true
+  - id: hallway-light
+    kind: actuator
+    controls: light
+    bus:
+      ref: gpio
+      line: 17
+      writable: true
+
+agent:
+  reasoning:
+    capability: chat
+    promptHint: |
+      Be conservative — when in doubt, leave the setpoint where it is.
+      Only change actuators when sensor readings clearly call for it.
+  evaluationEvery: 60s
diff --git a/go/cmd/fh-agent/main.go b/go/cmd/fh-agent/main.go
new file mode 100644
index 0000000..af7d482
--- /dev/null
+++ b/go/cmd/fh-agent/main.go
@@ -0,0 +1,272 @@
+// Command fh-agent compiles a site.spec.yaml into a deploy-ready
+// edge-agents bundle (workflow + mapping + resources + device manifest +
+// local-models config + compose stack).
+//
+// Pipeline: spec → plan → validate → build.
+//
+// All subcommands emit structured JSON on --json and exit non-zero on
+// diagnostics. The contract is documented in this command's README.
+package main
+
+import (
+	"encoding/json"
+	"flag"
+	"fmt"
+	"os"
+)
+
+const usage = `fh-agent — compile a site.spec.yaml into a deployable edge-agent bundle.
+
+Authoring (read/write files only):
+  fh-agent spec init [--out site.spec.yaml]
+  fh-agent spec schema [--json]
+  fh-agent spec validate <spec.yaml> [--json]
+
+Introspection (read-only, embedded data):
+  fh-agent targets list [--json]
+  fh-agent targets describe <id> [--json]
+  fh-agent capabilities [--json]
+  fh-agent models suggest --target <id> --capability <cap> [--max-ram-mb N] [--json]
+
+Compilation:
+  fh-agent plan <spec.yaml> --target <id> --out <build-dir>
+  fh-agent validate <build-dir> [--json]
+  fh-agent build <build-dir> --name <site-name> --out <dist-dir> [--tar]
+
+Exit codes:
+  0  ok
+  1  diagnostics (spec/plan/validate finding the user must fix)
+  2  infrastructure (IO error, embedded data corrupted)
+  64 usage error
+`
+
+func main() {
+	if len(os.Args) < 2 {
+		fmt.Fprint(os.Stderr, usage)
+		os.Exit(exitUsage)
+	}
+	cmd := os.Args[1]
+	args := os.Args[2:]
+	switch cmd {
+	case "spec":
+		runSpec(args)
+	case "targets":
+		runTargets(args)
+	case "capabilities":
+		runCapabilities(args)
+	case "models":
+		runModels(args)
+	case "plan":
+		runPlan(args)
+	case "validate":
+		runValidate(args)
+	case "build":
+		runBuild(args)
+	case "-h", "--help", "help":
+		fmt.Print(usage)
+	case "version", "--version", "-v":
+		fmt.Println("fh-agent v0.1.0")
+	default:
+		fmt.Fprintf(os.Stderr, "unknown command: %s\n\n%s", cmd, usage)
+		os.Exit(exitUsage)
+	}
+}
+
+// ----- spec subcommand -----
+
+func runSpec(args []string) {
+	if len(args) == 0 {
+		die(exitUsage, "spec subcommand required (init|schema|validate)")
+	}
+	switch args[0] {
+	case "init":
+		runSpecInit(args[1:])
+	case "schema":
+		runSpecSchema(args[1:])
+	case "validate":
+		runSpecValidate(args[1:])
+	default:
+		die(exitUsage, "unknown spec subcommand: %s", args[0])
+	}
+}
+
+func runSpecInit(args []string) {
+	fs := flag.NewFlagSet("spec init", flag.ExitOnError)
+	out := fs.String("out", "site.spec.yaml", "destination path")
+	_ = fs.Parse(args)
+	if _, err := os.Stat(*out); err == nil {
+		die(exitInfra, "%s already exists — refusing to overwrite", *out)
+	}
+	if err := os.WriteFile(*out, []byte(specInitTemplate), 0o644); err != nil {
+		die(exitInfra, "write %s: %v", *out, err)
+	}
+	fmt.Fprintf(os.Stderr, "wrote %s\n", *out)
+}
+
+func runSpecSchema(args []string) {
+	fs := flag.NewFlagSet("spec schema", flag.ExitOnError)
+	asJSON := fs.Bool("json", true, "emit JSON (currently the only format)")
+	_ = fs.Parse(args)
+	_ = asJSON // schema is JSON by definition; flag kept for symmetry
+	os.Stdout.Write(SpecSchema())
+}
+
+func runSpecValidate(args []string) {
+	fs := flag.NewFlagSet("spec validate", flag.ExitOnError)
+	_ = fs.Bool("json", true, "emit JSON diagnostics")
+	pos := parseMixed(fs, args)
+	if len(pos) < 1 {
+		die(exitUsage, "usage: fh-agent spec validate <spec.yaml>")
+	}
+	s, err := LoadSpec(pos[0])
+	if err != nil {
+		emitDiags(os.Stderr, []Diagnostic{{Severity: "error", Category: "spec", Message: err.Error()}})
+		os.Exit(exitDiagnostics)
+	}
+	diags := ValidateSpec(s)
+	emitDiags(os.Stderr, diags)
+	if hasError(diags) {
+		os.Exit(exitDiagnostics)
+	}
+}
+
+// ----- targets subcommand -----
+
+func runTargets(args []string) {
+	if len(args) == 0 {
+		die(exitUsage, "targets subcommand required (list|describe)")
+	}
+	switch args[0] {
+	case "list":
+		runTargetsList(args[1:])
+	case "describe":
+		runTargetsDescribe(args[1:])
+	default:
+		die(exitUsage, "unknown targets subcommand: %s", args[0])
+	}
+}
+
+func runTargetsList(args []string) {
+	fs := flag.NewFlagSet("targets list", flag.ExitOnError)
+	asJSON := fs.Bool("json", false, "emit JSON")
+	_ = fs.Parse(args)
+	ts, err := listTargets()
+	if err != nil {
+		die(exitInfra, "load targets: %v", err)
+	}
+	if *asJSON {
+		type row struct {
+			ID          string `json:"id"`
+			DisplayName string `json:"displayName"`
+			Arch        string `json:"arch"`
+			RAMMB       int    `json:"ramMB"`
+			Accel       string `json:"accel"`
+		}
+		out := make([]row, 0, len(ts))
+		for _, t := range ts {
+			out = append(out, row{t.ID, t.DisplayName, t.Arch, t.RAM.TotalMB, t.Accel.Type})
+		}
+		writeJSON(os.Stdout, out)
+		return
+	}
+	for _, t := range ts {
+		fmt.Printf("%-26s  %-8s  %5d MB  accel=%-6s  %s\n", t.ID, t.Arch, t.RAM.TotalMB, t.Accel.Type, t.DisplayName)
+	}
+}
+
+func runTargetsDescribe(args []string) {
+	fs := flag.NewFlagSet("targets describe", flag.ExitOnError)
+	_ = fs.Bool("json", true, "emit JSON (only format in v1)")
+	pos := parseMixed(fs, args)
+	if len(pos) < 1 {
+		die(exitUsage, "usage: fh-agent targets describe <id>")
+	}
+	t, err := getTarget(pos[0])
+	if err != nil {
+		die(exitDiagnostics, "%v", err)
+	}
+	writeJSON(os.Stdout, t)
+}
+
+// ----- capabilities subcommand -----
+
+func runCapabilities(args []string) {
+	fs := flag.NewFlagSet("capabilities", flag.ExitOnError)
+	_ = fs.Bool("json", true, "emit JSON")
+	_ = fs.Parse(args)
+	caps := struct {
+		BusTypes       []string `json:"busTypes"`
+		DeviceKinds    []string `json:"deviceKinds"`
+		LLMCapabilities []string `json:"llmCapabilities"`
+		ContractVersion int      `json:"contractWorkflowSchemaVersion"`
+		Notes          string   `json:"notes"`
+	}{
+		BusTypes:        []string{"mqtt", "gpio", "serial"},
+		DeviceKinds:     []string{"sensor", "actuator", "controller"},
+		LLMCapabilities: []string{"chat", "reasoning", "classification", "embedding", "function_call", "vision", "code"},
+		ContractVersion: 1,
+		Notes:           "v1 bus types map to engine channel types MQTT, GPIO (digital pin), UART (serial). I2C/SPI/HTTP/CtrlX-Data-Layer planned for later versions.",
+	}
+	writeJSON(os.Stdout, caps)
+}
+
+// ----- models subcommand -----
+
+func runModels(args []string) {
+	if len(args) == 0 {
+		die(exitUsage, "models subcommand required (suggest)")
+	}
+	switch args[0] {
+	case "suggest":
+		runModelsSuggest(args[1:])
+	default:
+		die(exitUsage, "unknown models subcommand: %s", args[0])
+	}
+}
+
+func runModelsSuggest(args []string) {
+	fs := flag.NewFlagSet("models suggest", flag.ExitOnError)
+	targetID := fs.String("target", "", "hardware target id")
+	cap := fs.String("capability", "", "required capability (chat|reasoning|embedding|...)")
+	maxRAM := fs.Int("max-ram-mb", 0, "optional hard RAM cap; 0 = use target available")
+	_ = fs.Bool("json", true, "emit JSON")
+	_ = fs.Parse(args)
+	if *targetID == "" || *cap == "" {
+		die(exitUsage, "usage: fh-agent models suggest --target <id> --capability <cap>")
+	}
+	t, err := getTarget(*targetID)
+	if err != nil {
+		die(exitDiagnostics, "%v", err)
+	}
+	out := suggestModels(t, *cap, *maxRAM)
+	writeJSON(os.Stdout, out)
+}
+
+// parseMixed parses args allowing flags and positional args in any order.
+// stdlib flag stops at the first non-flag arg; we loop, collect positionals,
+// and re-parse the remainder until exhausted. Returns positional args.
+func parseMixed(fs *flag.FlagSet, args []string) []string {
+	var positional []string
+	for len(args) > 0 {
+		_ = fs.Parse(args)
+		rem := fs.Args()
+		if len(rem) == 0 {
+			break
+		}
+		positional = append(positional, rem[0])
+		args = rem[1:]
+	}
+	return positional
+}
+
+// writeJSON emits indented, stable JSON to w. All Maps in inputs must have
+// string keys (Go's json encoder sorts those alphabetically — gives us
+// deterministic output for free).
+func writeJSON(w *os.File, v any) {
+	enc := json.NewEncoder(w)
+	enc.SetIndent("", "  ")
+	enc.SetEscapeHTML(false)
+	if err := enc.Encode(v); err != nil {
+		die(exitInfra, "encode JSON: %v", err)
+	}
+}
diff --git a/go/cmd/fh-agent/plan.go b/go/cmd/fh-agent/plan.go
new file mode 100644
index 0000000..caf4c7a
--- /dev/null
+++ b/go/cmd/fh-agent/plan.go
@@ -0,0 +1,761 @@
+package main
+
+import (
+	"crypto/sha256"
+	"encoding/hex"
+	"encoding/json"
+	"flag"
+	"fmt"
+	"os"
+	"path/filepath"
+	"sort"
+	"strings"
+
+	"gopkg.in/yaml.v3"
+)
+
+// runPlan is the heart of fh-agent: site.spec.yaml × target → build/ with
+// five artifacts: agent.workflow.json, site.mapping.json, site.resources.yaml,
+// device.manifest.json, local-models.yaml.
+//
+// MUST be deterministic — same spec + target → byte-identical output.
+// Otherwise an iterating agent sees diff noise across re-plans.
+func runPlan(args []string) {
+	fs := flag.NewFlagSet("plan", flag.ExitOnError)
+	targetID := fs.String("target", "", "hardware target id (overrides spec.target)")
+	out := fs.String("out", "build", "output directory")
+	pos := parseMixed(fs, args)
+	if len(pos) < 1 {
+		die(exitUsage, "usage: fh-agent plan <spec.yaml> [--target id] [--out build/]")
+	}
+	specPath := pos[0]
+
+	spec, err := LoadSpec(specPath)
+	if err != nil {
+		emitDiags(os.Stderr, []Diagnostic{{Severity: "error", Category: "spec", Message: err.Error()}})
+		os.Exit(exitDiagnostics)
+	}
+	if diags := ValidateSpec(spec); hasError(diags) {
+		emitDiags(os.Stderr, diags)
+		os.Exit(exitDiagnostics)
+	}
+	if *targetID != "" {
+		spec.Target = *targetID
+	}
+	target, err := getTarget(spec.Target)
+	if err != nil {
+		emitDiags(os.Stderr, []Diagnostic{{Severity: "error", Category: "plan", Message: err.Error(), Location: "$.target"}})
+		os.Exit(exitDiagnostics)
+	}
+
+	plan, diags := compile(spec, target)
+	if hasError(diags) {
+		emitDiags(os.Stderr, diags)
+		os.Exit(exitDiagnostics)
+	}
+
+	if err := os.MkdirAll(*out, 0o755); err != nil {
+		die(exitInfra, "mkdir %s: %v", *out, err)
+	}
+	if err := writePlanArtifacts(*out, plan); err != nil {
+		die(exitInfra, "write artifacts: %v", err)
+	}
+	if len(diags) > 0 {
+		emitDiags(os.Stderr, diags)
+	}
+	fmt.Fprintf(os.Stderr, "planned %s → %s (target=%s, %d devices, %d channels)\n",
+		specPath, *out, target.ID, len(spec.Devices), len(plan.Workflow.Channels))
+}
+
+// planResult is the in-memory bundle the compile pass produces.
+type planResult struct {
+	Workflow        Workflow
+	Mapping         DeploymentMapping
+	Resources       ExternalResources
+	DeviceManifest  DeviceManifest
+	LocalModels     LocalModelsConfig
+	BundleMetadata  BundleMetadata
+}
+
+// BundleMetadata is fh-agent–specific (not consumed by the engine). Kept in
+// the build dir so 'fh-agent build' can render the compose stack without
+// re-reading the spec.
+type BundleMetadata struct {
+	SchemaVersion int        `json:"schemaVersion" yaml:"schemaVersion"`
+	SpecName      string     `json:"specName" yaml:"specName"`
+	TargetID      string     `json:"targetId" yaml:"targetId"`
+	TargetArch    string     `json:"targetArch" yaml:"targetArch"`
+	SLMRuntime    TargetSLMRT `json:"slmRuntime" yaml:"slmRuntime"`
+	ChosenModel   ChosenModel `json:"chosenModel" yaml:"chosenModel"`
+}
+
+type ChosenModel struct {
+	ID        string `json:"id" yaml:"id"`
+	RAMMB     int    `json:"ramMB" yaml:"ramMB"`
+	GPURequest string `json:"gpuRequest,omitempty" yaml:"gpuRequest,omitempty"`
+}
+
+// ---------- engine-side artifact shapes (subset of contract) ----------
+
+// Workflow is the subset of the engine workflow contract we emit. We treat
+// node arguments as raw JSON objects so we can hand-craft per node type
+// without modelling every field statically. The downstream
+// `fh-workflow validate` is the authoritative schema check.
+type Workflow struct {
+	SchemaVersion     int                      `json:"schemaVersion"`
+	Nodes             []map[string]any         `json:"nodes"`
+	Edges             []map[string]any         `json:"edges"`
+	Functions         []any                    `json:"functions"`
+	DeclaredVariables []any                    `json:"declaredVariables"`
+	Channels          []map[string]any         `json:"channels"`
+	Memory            []any                    `json:"memory"`
+	Models            []map[string]any         `json:"models"`
+}
+
+// DeploymentMapping per contract/engine.yaml — keyed by workflow resource id.
+type DeploymentMapping map[string]ResourceBinding
+type ResourceBinding struct {
+	Ref   string `json:"ref"`
+	Index *int   `json:"index,omitempty"`
+}
+
+// ExternalResources per contract/engine.yaml — keyed by platform resource id.
+type ExternalResources map[string]map[string]any
+
+// DeviceManifest per contract/engine.yaml — keyed by driver instance id.
+type DeviceManifest struct {
+	GPIOs   map[string]map[string]any `json:"gpios,omitempty"`
+	Serials map[string]map[string]any `json:"serials,omitempty"`
+	PWMs    map[string]map[string]any `json:"pwms,omitempty"`
+	ADCs    map[string]map[string]any `json:"adcs,omitempty"`
+	DACs    map[string]map[string]any `json:"dacs,omitempty"`
+}
+
+// LocalModelsConfig is the format the engine's Local LLM provider expects
+// (see go/llmproxy README). One endpoint per process, models declared with
+// capabilities.
+type LocalModelsConfig struct {
+	Endpoints []LocalEndpoint `yaml:"endpoints"`
+}
+type LocalEndpoint struct {
+	URL    string        `yaml:"url"`
+	Models []LocalModel  `yaml:"models"`
+}
+type LocalModel struct {
+	ID           string   `yaml:"id"`
+	Capabilities []string `yaml:"capabilities"`
+	Dimension    int      `yaml:"dimension,omitempty"`
+}
+
+// ---------- compiler ----------
+
+// compile is the deterministic pass spec × target → plan artifacts.
+func compile(spec *Spec, target *Target) (planResult, []Diagnostic) {
+	var diags []Diagnostic
+
+	chosen, suggDiags := pickReasoningModel(spec, target)
+	diags = append(diags, suggDiags...)
+
+	workflow := Workflow{
+		SchemaVersion:     1,
+		Nodes:             []map[string]any{},
+		Edges:             []map[string]any{},
+		Functions:         []any{},
+		DeclaredVariables: []any{},
+		Channels:          []map[string]any{},
+		Memory:            []any{},
+		Models:            []map[string]any{},
+	}
+	mapping := DeploymentMapping{}
+	resources := ExternalResources{}
+	manifest := DeviceManifest{
+		GPIOs:   map[string]map[string]any{},
+		Serials: map[string]map[string]any{},
+		PWMs:    map[string]map[string]any{},
+		ADCs:    map[string]map[string]any{},
+		DACs:    map[string]map[string]any{},
+	}
+
+	// Index spec.buses for fast lookup.
+	busByID := map[string]Bus{}
+	for _, b := range spec.Buses {
+		busByID[b.ID] = b
+	}
+
+	// 1. Model declaration in workflow. Local SLM is referenced by id; the
+	//    Local provider routes via the embedded local-models.yaml.
+	if chosen.ID != "" {
+		workflow.Models = append(workflow.Models, map[string]any{
+			"type":         "LLMModel",
+			"id":           chosen.ID,
+			"label":        chosen.ID,
+			"capabilities": []string{spec.Agent.Reasoning.Capability},
+		})
+	}
+
+	// 2. Devices → channels (+ matching mapping/resources/manifest entries).
+	//    Channels are sorted by stable id for reproducible output.
+	sortedDevices := append([]Device(nil), spec.Devices...)
+	sort.Slice(sortedDevices, func(i, j int) bool { return sortedDevices[i].ID < sortedDevices[j].ID })
+
+	for _, d := range sortedDevices {
+		bus := busByID[d.Bus.Ref]
+		switch bus.Type {
+		case "mqtt":
+			chID := "ch-mqtt-" + sanitize(d.ID)
+			workflow.Channels = append(workflow.Channels, map[string]any{
+				"type":  "MQTT",
+				"id":    chID,
+				"label": d.ID,
+				"topic": d.Bus.Topic,
+			})
+			// MQTT channels resolve against ExternalResources via mapping.ref.
+			resID := "mqtt-" + sanitize(bus.ID)
+			mapping[chID] = ResourceBinding{Ref: resID}
+			resources[resID] = mqttResource(bus)
+
+		case "gpio":
+			direction := "GPIOIN"
+			if d.Bus.Writable || d.Kind == "actuator" {
+				direction = "GPIOOUT"
+			}
+			chID := "ch-gpio-" + sanitize(d.ID)
+			ch := map[string]any{
+				"type":  direction,
+				"id":    chID,
+				"label": d.ID,
+			}
+			if direction == "GPIOIN" {
+				ch["bias"] = "pulldown"
+				ch["debounceMs"] = 20
+			}
+			workflow.Channels = append(workflow.Channels, ch)
+			gpioID := pickGPIOChip(target, bus)
+			line := 0
+			if d.Bus.Line != nil {
+				line = *d.Bus.Line
+			}
+			mapping[chID] = ResourceBinding{Ref: gpioID, Index: &line}
+			manifest.GPIOs[gpioID] = map[string]any{"chip": gpioID}
+
+		case "serial":
+			chID := "ch-uart-" + sanitize(d.ID)
+			workflow.Channels = append(workflow.Channels, map[string]any{
+				"type":  "UART",
+				"id":    chID,
+				"label": d.ID,
+			})
+			serID := pickSerial(target, bus)
+			mapping[chID] = ResourceBinding{Ref: serID}
+			serCfg := map[string]any{"device": serialDevice(target, bus)}
+			if bus.Baud > 0 {
+				serCfg["baud"] = bus.Baud
+			}
+			manifest.Serials[serID] = serCfg
+		}
+	}
+
+	// 3. Nodes — minimal but engine-loadable. Per device-class one node;
+	//    a single Agent driven by Ticker. Layout positions are computed
+	//    from index for stable visual output in fh-builder.
+	startupID := nodeID(spec.Name, "OnStartup", "boot")
+	tickerID := nodeID(spec.Name, "Ticker", "agent")
+	agentID := nodeID(spec.Name, "Agent", "reasoner")
+
+	workflow.Nodes = append(workflow.Nodes,
+		map[string]any{
+			"id":   startupID,
+			"type": "OnStartup",
+			"position": map[string]any{"x": 0, "y": 0},
+			"arguments": map[string]any{},
+		},
+		map[string]any{
+			"id":   tickerID,
+			"type": "Ticker",
+			"position": map[string]any{"x": 0, "y": 120},
+			"arguments": tickerArgs(spec.Agent.EvaluationEvery),
+		},
+		map[string]any{
+			"id":   agentID,
+			"type": "Agent",
+			"position": map[string]any{"x": 300, "y": 60},
+			"arguments": map[string]any{
+				"name":               "site-agent",
+				"model":              chosen.ID,
+				"instructions":       buildAgentInstructions(spec, target),
+				"maxTurns":           6,
+				"answer":             map[string]any{"active": false, "mode": "emit", "name": "answer"},
+				"outputDeclarations": []any{},
+				"memoryRefs":         []any{},
+			},
+		},
+	)
+
+	// Boot edge: OnStartup → Agent (one-shot warmup).
+	workflow.Edges = append(workflow.Edges, controlEdge(startupID, agentID))
+	// Periodic edge: Ticker → Agent.
+	workflow.Edges = append(workflow.Edges, controlEdge(tickerID, agentID))
+
+	// 4. Per-device IO nodes.
+	for i, d := range sortedDevices {
+		bus := busByID[d.Bus.Ref]
+		y := 240 + i*80
+		switch bus.Type {
+		case "mqtt":
+			chID := "ch-mqtt-" + sanitize(d.ID)
+			if d.Kind == "sensor" {
+				id := nodeID(spec.Name, "OnMqttMessage", d.ID)
+				dt := inferDataType(d)
+				workflow.Nodes = append(workflow.Nodes, map[string]any{
+					"id":   id,
+					"type": "OnMqttMessage",
+					"position": map[string]any{"x": 0, "y": y},
+					"arguments": map[string]any{
+						"channelReference": chID,
+						"dataType":         dt,
+						"output":           map[string]any{"active": true, "mode": "emit", "name": d.ID},
+					},
+				})
+				workflow.Edges = append(workflow.Edges, controlEdge(id, agentID))
+			} else if d.Kind == "actuator" {
+				id := nodeID(spec.Name, "MqttPublish", d.ID)
+				dt := inferDataType(d)
+				workflow.Nodes = append(workflow.Nodes, map[string]any{
+					"id":   id,
+					"type": "MqttPublish",
+					"position": map[string]any{"x": 600, "y": y},
+					"arguments": map[string]any{
+						"channelReference": chID,
+						"dataType":         dt,
+						"value":            literalExpr("", dt),
+						"qos":              0,
+						"retain":           false,
+					},
+				})
+				workflow.Edges = append(workflow.Edges, agentToolEdge(agentID, id, fmt.Sprintf("Write to actuator %q (%s in zone %s)", d.ID, d.Controls, d.Zone)))
+			}
+		case "gpio":
+			chID := "ch-gpio-" + sanitize(d.ID)
+			if d.Kind == "sensor" {
+				id := nodeID(spec.Name, "OnPinEdge", d.ID)
+				workflow.Nodes = append(workflow.Nodes, map[string]any{
+					"id":   id,
+					"type": "OnPinEdge",
+					"position": map[string]any{"x": 0, "y": y},
+					"arguments": map[string]any{
+						"pinReference": chID,
+						"edge":         "both",
+					},
+				})
+				workflow.Edges = append(workflow.Edges, controlEdge(id, agentID))
+			} else if d.Kind == "actuator" {
+				id := nodeID(spec.Name, "WritePin", d.ID)
+				workflow.Nodes = append(workflow.Nodes, map[string]any{
+					"id":   id,
+					"type": "WritePin",
+					"position": map[string]any{"x": 600, "y": y},
+					"arguments": map[string]any{
+						"pinReference": chID,
+						"signalType":   "digital",
+						"value":        literalExpr(false, "bool"),
+					},
+				})
+				workflow.Edges = append(workflow.Edges, agentToolEdge(agentID, id, fmt.Sprintf("Drive GPIO actuator %q (%s)", d.ID, d.Controls)))
+			}
+		case "serial":
+			chID := "ch-uart-" + sanitize(d.ID)
+			if d.Kind == "sensor" {
+				id := nodeID(spec.Name, "OnSerialReceive", d.ID)
+				workflow.Nodes = append(workflow.Nodes, map[string]any{
+					"id":   id,
+					"type": "OnSerialReceive",
+					"position": map[string]any{"x": 0, "y": y},
+					"arguments": map[string]any{
+						"portReference": chID,
+						"output":        map[string]any{"active": true, "mode": "emit", "name": d.ID},
+					},
+				})
+				workflow.Edges = append(workflow.Edges, controlEdge(id, agentID))
+			} else if d.Kind == "actuator" {
+				id := nodeID(spec.Name, "SerialWrite", d.ID)
+				workflow.Nodes = append(workflow.Nodes, map[string]any{
+					"id":   id,
+					"type": "SerialWrite",
+					"position": map[string]any{"x": 600, "y": y},
+					"arguments": map[string]any{
+						"portReference": chID,
+						"value":         literalExpr("", "string"),
+					},
+				})
+				workflow.Edges = append(workflow.Edges, agentToolEdge(agentID, id, fmt.Sprintf("Write to serial actuator %q", d.ID)))
+			}
+		}
+	}
+
+	// 5. Local-models.yaml — one endpoint, one model entry, capability list
+	//    drawn from the target catalog.
+	local := LocalModelsConfig{
+		Endpoints: []LocalEndpoint{
+			{
+				URL: fmt.Sprintf("http://localhost:%d", target.SLMRuntime.ServePort),
+				Models: []LocalModel{
+					{
+						ID:           chosen.ID,
+						Capabilities: modelCapabilities(target, chosen.ID),
+						Dimension:    modelDimension(target, chosen.ID),
+					},
+				},
+			},
+		},
+	}
+
+	return planResult{
+		Workflow:       workflow,
+		Mapping:        mapping,
+		Resources:      resources,
+		DeviceManifest: manifest,
+		LocalModels:    local,
+		BundleMetadata: BundleMetadata{
+			SchemaVersion: 1,
+			SpecName:      spec.Name,
+			TargetID:      target.ID,
+			TargetArch:    target.Arch,
+			SLMRuntime:    target.SLMRuntime,
+			ChosenModel: ChosenModel{
+				ID:         chosen.ID,
+				RAMMB:      chosen.RAMMB,
+				GPURequest: target.SLMRuntime.GPURequest,
+			},
+		},
+	}, diags
+}
+
+// pickReasoningModel returns the best-fit SLM for the requested capability
+// or an error diag if none fit on the target.
+func pickReasoningModel(spec *Spec, target *Target) (TargetSLM, []Diagnostic) {
+	cands := suggestModels(target, spec.Agent.Reasoning.Capability, 0)
+	if len(cands) == 0 {
+		return TargetSLM{}, []Diagnostic{{
+			Severity: "error",
+			Category: "plan",
+			Message: fmt.Sprintf("no SLM on target %q satisfies capability %q within %d MB available RAM",
+				target.ID, spec.Agent.Reasoning.Capability, target.RAM.availableMB()),
+			Location: "$.agent.reasoning.capability",
+		}}
+	}
+	// Prefer the largest model that still fits — better quality than the
+	// smallest. suggestModels returns smallest-first, so reverse-pick.
+	return cands[len(cands)-1], nil
+}
+
+func modelCapabilities(t *Target, id string) []string {
+	for _, m := range t.SLMs {
+		if m.ID == id {
+			return append([]string(nil), m.Capabilities...)
+		}
+	}
+	return nil
+}
+
+func modelDimension(t *Target, id string) int {
+	for _, m := range t.SLMs {
+		if m.ID == id {
+			return m.Dimension
+		}
+	}
+	return 0
+}
+
+// pickGPIOChip returns the chip id either from the bus override or the
+// target's first gpiochip. Errors are handled later in validate.
+func pickGPIOChip(t *Target, b Bus) string {
+	if b.Chip != "" {
+		return b.Chip
+	}
+	if len(t.Hardware.GPIOs) > 0 {
+		return t.Hardware.GPIOs[0].ID
+	}
+	return "gpiochip0"
+}
+
+func pickSerial(t *Target, b Bus) string {
+	if b.Device != "" {
+		return "uart-" + sanitize(b.ID)
+	}
+	if len(t.Hardware.Serials) > 0 {
+		return t.Hardware.Serials[0].ID
+	}
+	return "uart-default"
+}
+
+func serialDevice(t *Target, b Bus) string {
+	if b.Device != "" {
+		return b.Device
+	}
+	if len(t.Hardware.Serials) > 0 {
+		return t.Hardware.Serials[0].Device
+	}
+	return "/dev/ttyUSB0"
+}
+
+func mqttResource(b Bus) map[string]any {
+	out := map[string]any{
+		"type":      "mqtt",
+		"brokerUrl": b.BrokerURL,
+	}
+	if b.Username != "" {
+		out["username"] = b.Username
+	}
+	if b.Password != "" {
+		out["password"] = b.Password
+	}
+	return out
+}
+
+func controlEdge(from, to string) map[string]any {
+	return map[string]any{
+		"id":   "e-ctrl-" + shortHash(from+"->"+to),
+		"type": "control",
+		"from": map[string]any{"nodeId": from, "port": "ctrl"},
+		"to":   map[string]any{"nodeId": to, "port": "ctrl"},
+	}
+}
+
+// agentToolEdge wires a tool node onto the agent. The contract requires
+// every agentTask edge to carry a `prompt` Expression — that is the
+// LLM-readable description of what the tool does.
+func agentToolEdge(from, to, description string) map[string]any {
+	return map[string]any{
+		"id":     "e-tool-" + shortHash(from+"->"+to),
+		"type":   "agentTask",
+		"from":   map[string]any{"nodeId": from, "port": "tool"},
+		"to":     map[string]any{"nodeId": to, "port": "ctrl"},
+		"prompt": literalExpr(description, "string"),
+	}
+}
+
+// literalExpr builds a workflow.Expression with no variable references —
+// a constant value the agent fills in at tool-call time (or that the engine
+// uses as a default).
+func literalExpr(value any, dataType string) map[string]any {
+	expr := fmt.Sprintf("%v", value)
+	if expr == "" {
+		switch dataType {
+		case "float", "int":
+			expr = "0"
+		case "bool":
+			expr = "false"
+		default:
+			expr = `""`
+		}
+	}
+	return map[string]any{
+		"expression": expr,
+		"references": []any{},
+		"dataType":   dataType,
+	}
+}
+
+// tickerArgs splits "60s" / "5m" / "100ms" / "1h" into intervalValue +
+// intervalUnit as the contract requires. Falls back to 60 seconds.
+func tickerArgs(s string) map[string]any {
+	if s == "" {
+		return map[string]any{"intervalValue": 60, "intervalUnit": "seconds"}
+	}
+	unit := "seconds"
+	body := s
+	switch {
+	case strings.HasSuffix(s, "ms"):
+		unit, body = "milliseconds", strings.TrimSuffix(s, "ms")
+	case strings.HasSuffix(s, "s"):
+		unit, body = "seconds", strings.TrimSuffix(s, "s")
+	case strings.HasSuffix(s, "m"):
+		unit, body = "minutes", strings.TrimSuffix(s, "m")
+	case strings.HasSuffix(s, "h"):
+		unit, body = "hours", strings.TrimSuffix(s, "h")
+	}
+	n := 0
+	for _, c := range body {
+		if c < '0' || c > '9' {
+			return map[string]any{"intervalValue": 60, "intervalUnit": "seconds"}
+		}
+		n = n*10 + int(c-'0')
+	}
+	if n == 0 {
+		n = 60
+	}
+	return map[string]any{"intervalValue": n, "intervalUnit": unit}
+}
+
+// nodeID derives a stable id from spec name + node type + discriminator.
+// Same input → same id; agents can diff plan outputs across runs cleanly.
+func nodeID(specName, nodeType, disc string) string {
+	return nodeType + "_" + shortHash(specName+"|"+nodeType+"|"+disc)
+}
+
+func shortHash(s string) string {
+	h := sha256.Sum256([]byte(s))
+	return hex.EncodeToString(h[:6])
+}
+
+// sanitize maps an arbitrary id into [a-z0-9-] for use in channel/resource
+// identifiers.
+func sanitize(s string) string {
+	out := make([]byte, 0, len(s))
+	for _, r := range strings.ToLower(s) {
+		switch {
+		case r >= 'a' && r <= 'z', r >= '0' && r <= '9':
+			out = append(out, byte(r))
+		case r == '-', r == '_', r == ' ', r == '.':
+			out = append(out, '-')
+		}
+	}
+	return string(out)
+}
+
+func parseEvery(s string) int {
+	if s == "" {
+		return 60_000
+	}
+	mult := 1000
+	body := s
+	switch {
+	case strings.HasSuffix(s, "ms"):
+		mult, body = 1, strings.TrimSuffix(s, "ms")
+	case strings.HasSuffix(s, "s"):
+		mult, body = 1000, strings.TrimSuffix(s, "s")
+	case strings.HasSuffix(s, "m"):
+		mult, body = 60_000, strings.TrimSuffix(s, "m")
+	case strings.HasSuffix(s, "h"):
+		mult, body = 3_600_000, strings.TrimSuffix(s, "h")
+	}
+	n := 0
+	for _, c := range body {
+		if c < '0' || c > '9' {
+			return 60_000
+		}
+		n = n*10 + int(c-'0')
+	}
+	if n == 0 {
+		return 60_000
+	}
+	return n * mult
+}
+
+// inferDataType maps a device's unit/measurement to a workflow DataType.
+func inferDataType(d Device) string {
+	if d.Unit != "" {
+		return "float"
+	}
+	switch d.Measures {
+	case "temperature", "humidity", "co2", "pressure", "voltage", "current":
+		return "float"
+	case "presence", "open", "closed":
+		return "bool"
+	case "text", "command":
+		return "string"
+	}
+	switch d.Controls {
+	case "light", "valve":
+		return "bool"
+	}
+	return "string"
+}
+
+// buildAgentInstructions composes the reasoning agent's system prompt from
+// the spec's goals, constraints, devices, and user hint. Deterministic order.
+func buildAgentInstructions(spec *Spec, target *Target) string {
+	var sb strings.Builder
+	sb.WriteString(fmt.Sprintf("You are the on-device agent for the site %q running on a %s.\n", spec.Name, target.DisplayName))
+	if spec.Description != "" {
+		sb.WriteString(spec.Description + "\n")
+	}
+	if len(spec.Goals) > 0 {
+		sb.WriteString("\nGoals:\n")
+		for _, g := range spec.Goals {
+			sb.WriteString(fmt.Sprintf("- (%s) %s\n", g.ID, g.Description))
+		}
+	}
+	if len(spec.Constraints) > 0 {
+		sb.WriteString("\nHard constraints (do not violate):\n")
+		for _, c := range spec.Constraints {
+			sb.WriteString(fmt.Sprintf("- (%s) %s\n", c.ID, c.Description))
+		}
+	}
+	sortedDevs := append([]Device(nil), spec.Devices...)
+	sort.Slice(sortedDevs, func(i, j int) bool { return sortedDevs[i].ID < sortedDevs[j].ID })
+	if len(sortedDevs) > 0 {
+		sb.WriteString("\nDevices available:\n")
+		for _, d := range sortedDevs {
+			role := d.Measures
+			if d.Kind == "actuator" {
+				role = d.Controls
+			}
+			zone := d.Zone
+			if zone == "" {
+				zone = "—"
+			}
+			sb.WriteString(fmt.Sprintf("- %s [%s, %s, zone=%s]\n", d.ID, d.Kind, role, zone))
+		}
+	}
+	if hint := strings.TrimSpace(spec.Agent.Reasoning.PromptHint); hint != "" {
+		sb.WriteString("\nAdditional guidance:\n")
+		sb.WriteString(hint)
+		sb.WriteString("\n")
+	}
+	return sb.String()
+}
+
+// ---------- artifact writers (deterministic) ----------
+
+func writePlanArtifacts(dir string, p planResult) error {
+	if err := writeStableJSON(filepath.Join(dir, "agent.workflow.json"), p.Workflow); err != nil {
+		return err
+	}
+	if err := writeStableJSON(filepath.Join(dir, "site.mapping.json"), p.Mapping); err != nil {
+		return err
+	}
+	if err := writeStableJSON(filepath.Join(dir, "device.manifest.json"), p.DeviceManifest); err != nil {
+		return err
+	}
+	if err := writeStableYAML(filepath.Join(dir, "site.resources.yaml"), p.Resources); err != nil {
+		return err
+	}
+	if err := writeStableYAML(filepath.Join(dir, "local-models.yaml"), p.LocalModels); err != nil {
+		return err
+	}
+	if err := writeStableJSON(filepath.Join(dir, "bundle.meta.json"), p.BundleMetadata); err != nil {
+		return err
+	}
+	return nil
+}
+
+// writeStableJSON writes JSON with sorted map keys and stable indentation.
+// json.Marshal already sorts map keys; for nested maps we round-trip through
+// json.RawMessage to normalize key order recursively.
+func writeStableJSON(path string, v any) error {
+	buf, err := json.MarshalIndent(v, "", "  ")
+	if err != nil {
+		return fmt.Errorf("marshal %s: %w", path, err)
+	}
+	// Round-trip via decode-into-interface{} → re-marshal, which sorts
+	// nested map keys (encoding/json sorts only top-level map keys, but
+	// not deeply-nested maps inside slices of any).
+	var generic any
+	if err := json.Unmarshal(buf, &generic); err != nil {
+		return fmt.Errorf("renormalize %s: %w", path, err)
+	}
+	sorted, err := json.MarshalIndent(generic, "", "  ")
+	if err != nil {
+		return fmt.Errorf("re-marshal %s: %w", path, err)
+	}
+	return os.WriteFile(path, append(sorted, '\n'), 0o644)
+}
+
+func writeStableYAML(path string, v any) error {
+	buf, err := yaml.Marshal(v)
+	if err != nil {
+		return fmt.Errorf("marshal %s: %w", path, err)
+	}
+	return os.WriteFile(path, buf, 0o644)
+}
diff --git a/go/cmd/fh-agent/plan_test.go b/go/cmd/fh-agent/plan_test.go
new file mode 100644
index 0000000..1909679
--- /dev/null
+++ b/go/cmd/fh-agent/plan_test.go
@@ -0,0 +1,165 @@
+package main
+
+import (
+	"bytes"
+	"encoding/json"
+	"os"
+	"path/filepath"
+	"testing"
+)
+
+// TestCompileIsDeterministic plans the example spec twice and ensures the
+// generated artifacts are byte-identical. Iterating agents rely on this —
+// any non-deterministic field (timestamps, random ids, map iteration order)
+// would break the workflow.
+func TestCompileIsDeterministic(t *testing.T) {
+	exampleSpec := "examples/building-automation.site.yaml"
+	for _, targetID := range []string{"rpi5-8gb", "stm32mp25-1gb", "jetson-orin-nano-8gb", "x86-nuc-16gb", "ctrlx-core-arm64"} {
+		t.Run(targetID, func(t *testing.T) {
+			a := planTo(t, exampleSpec, targetID)
+			b := planTo(t, exampleSpec, targetID)
+			if len(a) != len(b) {
+				t.Fatalf("artifact count differs across runs: %d vs %d", len(a), len(b))
+			}
+			for name, contentA := range a {
+				contentB, ok := b[name]
+				if !ok {
+					t.Errorf("%s: missing in second run", name)
+					continue
+				}
+				if !bytes.Equal(contentA, contentB) {
+					t.Errorf("%s: bytes differ across runs (non-deterministic)", name)
+				}
+			}
+		})
+	}
+}
+
+// TestCompileFitsTarget plans the example on every embedded target and checks
+// the chosen model's RAM fits within the target's available budget.
+func TestCompileFitsTarget(t *testing.T) {
+	targets, err := loadAllTargets()
+	if err != nil {
+		t.Fatalf("load targets: %v", err)
+	}
+	spec, err := LoadSpec("examples/building-automation.site.yaml")
+	if err != nil {
+		t.Fatalf("load spec: %v", err)
+	}
+	for id, target := range targets {
+		t.Run(id, func(t *testing.T) {
+			plan, diags := compile(spec, target)
+			if hasError(diags) {
+				t.Fatalf("compile produced errors: %+v", diags)
+			}
+			if plan.BundleMetadata.ChosenModel.RAMMB > target.RAM.availableMB() {
+				t.Errorf("chosen model %q needs %d MB, target has %d MB available",
+					plan.BundleMetadata.ChosenModel.ID,
+					plan.BundleMetadata.ChosenModel.RAMMB,
+					target.RAM.availableMB())
+			}
+		})
+	}
+}
+
+// TestValidateCatchesDanglingMapping mangles a planned bundle by deleting an
+// entry from site.resources.yaml — validate must flag it.
+func TestValidateCatchesDanglingMapping(t *testing.T) {
+	exampleSpec := "examples/building-automation.site.yaml"
+	dir := t.TempDir()
+	spec, err := LoadSpec(exampleSpec)
+	if err != nil {
+		t.Fatalf("load spec: %v", err)
+	}
+	target, err := getTarget("rpi5-8gb")
+	if err != nil {
+		t.Fatalf("get target: %v", err)
+	}
+	plan, diags := compile(spec, target)
+	if hasError(diags) {
+		t.Fatalf("compile: %+v", diags)
+	}
+	if err := writePlanArtifacts(dir, plan); err != nil {
+		t.Fatalf("write: %v", err)
+	}
+
+	// Corrupt: blank out resources file.
+	if err := os.WriteFile(filepath.Join(dir, "site.resources.yaml"), []byte("{}\n"), 0o644); err != nil {
+		t.Fatalf("corrupt: %v", err)
+	}
+
+	// Reload & cross-check manually (we can't call runValidate without
+	// triggering os.Exit). Same logic, no exit.
+	wf, _ := loadWorkflow(filepath.Join(dir, "agent.workflow.json"))
+	mapping, _ := loadMapping(filepath.Join(dir, "site.mapping.json"))
+	resources, _ := loadResources(filepath.Join(dir, "site.resources.yaml"))
+
+	found := false
+	for chID, b := range mapping {
+		var typ string
+		for _, ch := range wf.Channels {
+			if ch["id"] == chID {
+				typ, _ = ch["type"].(string)
+				break
+			}
+		}
+		if typ == "MQTT" {
+			if _, ok := resources[b.Ref]; !ok {
+				found = true
+			}
+		}
+	}
+	if !found {
+		t.Error("expected validate logic to detect missing mqtt resource binding, but didn't")
+	}
+}
+
+// planTo runs compile + writePlanArtifacts and returns the artifacts as
+// name→bytes for byte-level comparison.
+func planTo(t *testing.T, specPath, targetID string) map[string][]byte {
+	t.Helper()
+	spec, err := LoadSpec(specPath)
+	if err != nil {
+		t.Fatalf("load spec: %v", err)
+	}
+	target, err := getTarget(targetID)
+	if err != nil {
+		t.Fatalf("get target: %v", err)
+	}
+	plan, diags := compile(spec, target)
+	if hasError(diags) {
+		t.Fatalf("compile: %+v", diags)
+	}
+	dir := t.TempDir()
+	if err := writePlanArtifacts(dir, plan); err != nil {
+		t.Fatalf("write: %v", err)
+	}
+	out := map[string][]byte{}
+	for _, f := range []string{
+		"agent.workflow.json", "site.mapping.json", "site.resources.yaml",
+		"device.manifest.json", "local-models.yaml", "bundle.meta.json",
+	} {
+		raw, err := os.ReadFile(filepath.Join(dir, f))
+		if err != nil {
+			t.Fatalf("read %s: %v", f, err)
+		}
+		// Round-trip JSON through json.RawMessage to normalize whitespace —
+		// catches accidental non-determinism in the writer itself.
+		if filepath.Ext(f) == ".json" {
+			var v any
+			if err := json.Unmarshal(raw, &v); err != nil {
+				t.Fatalf("parse %s: %v", f, err)
+			}
+		}
+		out[f] = raw
+	}
+	return out
+}
+
+// TestSpecSchemaIsValidJSON sanity-checks the hand-written schema parses.
+func TestSpecSchemaIsValidJSON(t *testing.T) {
+	var v any
+	if err := json.Unmarshal(SpecSchema(), &v); err != nil {
+		t.Fatalf("SpecSchema is not valid JSON: %v", err)
+	}
+}
diff --git a/go/cmd/fh-agent/spec.go b/go/cmd/fh-agent/spec.go
new file mode 100644
index 0000000..2b03bdd
--- /dev/null
+++ b/go/cmd/fh-agent/spec.go
@@ -0,0 +1,405 @@
+package main
+
+import (
+	"bytes"
+	"encoding/json"
+	"errors"
+	"fmt"
+	"os"
+
+	"gopkg.in/yaml.v3"
+)
+
+// Spec is the user-facing site description. It is the single durable artifact
+// the user maintains; every other build artifact is regenerated from it.
+type Spec struct {
+	SchemaVersion int          `yaml:"schemaVersion" json:"schemaVersion"`
+	Name          string       `yaml:"name" json:"name"`
+	Target        string       `yaml:"target" json:"target"`
+	Description   string       `yaml:"description,omitempty" json:"description,omitempty"`
+	Goals         []Goal       `yaml:"goals,omitempty" json:"goals,omitempty"`
+	Constraints   []Constraint `yaml:"constraints,omitempty" json:"constraints,omitempty"`
+	Zones         []Zone       `yaml:"zones,omitempty" json:"zones,omitempty"`
+	Buses         []Bus        `yaml:"buses" json:"buses"`
+	Devices       []Device     `yaml:"devices" json:"devices"`
+	Agent         Agent        `yaml:"agent" json:"agent"`
+}
+
+type Goal struct {
+	ID          string `yaml:"id" json:"id"`
+	Description string `yaml:"description" json:"description"`
+}
+
+type Constraint struct {
+	ID          string `yaml:"id" json:"id"`
+	Description string `yaml:"description" json:"description"`
+}
+
+type Zone struct {
+	ID   string `yaml:"id" json:"id"`
+	Name string `yaml:"name" json:"name"`
+}
+
+// Bus describes a transport reachable from the site (MQTT broker, GPIO chip,
+// serial port). Devices reference a bus by id.
+type Bus struct {
+	ID        string `yaml:"id" json:"id"`
+	Type      string `yaml:"type" json:"type"` // mqtt | gpio | serial
+	BrokerURL string `yaml:"brokerUrl,omitempty" json:"brokerUrl,omitempty"`
+	Username  string `yaml:"username,omitempty" json:"username,omitempty"`
+	Password  string `yaml:"password,omitempty" json:"password,omitempty"`
+	Chip      string `yaml:"chip,omitempty" json:"chip,omitempty"`     // gpio: overrides target default
+	Device    string `yaml:"device,omitempty" json:"device,omitempty"` // serial: overrides target default
+	Baud      int    `yaml:"baud,omitempty" json:"baud,omitempty"`
+}
+
+type Device struct {
+	ID       string    `yaml:"id" json:"id"`
+	Zone     string    `yaml:"zone,omitempty" json:"zone,omitempty"`
+	Kind     string    `yaml:"kind" json:"kind"`               // sensor | actuator | controller
+	Measures string    `yaml:"measures,omitempty" json:"measures,omitempty"` // sensors: temperature, humidity, co2, presence, ...
+	Controls string    `yaml:"controls,omitempty" json:"controls,omitempty"` // actuators: heating, cooling, light, valve, ...
+	Unit     string    `yaml:"unit,omitempty" json:"unit,omitempty"`
+	Bus      DeviceBus `yaml:"bus" json:"bus"`
+}
+
+// DeviceBus binds a device to one of the spec's buses with the per-device
+// addressing (mqtt topic, gpio line number, etc).
+type DeviceBus struct {
+	Ref      string `yaml:"ref" json:"ref"` // buses[].id
+	Topic    string `yaml:"topic,omitempty" json:"topic,omitempty"`
+	Line     *int   `yaml:"line,omitempty" json:"line,omitempty"` // gpio line / pwm channel
+	Writable bool   `yaml:"writable,omitempty" json:"writable,omitempty"`
+}
+
+type Agent struct {
+	Reasoning       AgentReasoning `yaml:"reasoning" json:"reasoning"`
+	EvaluationEvery string         `yaml:"evaluationEvery,omitempty" json:"evaluationEvery,omitempty"` // simple "60s" / "5m"
+}
+
+type AgentReasoning struct {
+	Capability string `yaml:"capability" json:"capability"` // chat | reasoning | classification | embedding
+	PromptHint string `yaml:"promptHint,omitempty" json:"promptHint,omitempty"`
+}
+
+// LoadSpec reads + parses a site.spec.yaml in strict mode (unknown fields
+// fail loudly — agents would otherwise emit silently-ignored typos).
+func LoadSpec(path string) (*Spec, error) {
+	raw, err := os.ReadFile(path)
+	if err != nil {
+		return nil, fmt.Errorf("read spec: %w", err)
+	}
+	dec := yaml.NewDecoder(bytes.NewReader(raw))
+	dec.KnownFields(true)
+	var s Spec
+	if err := dec.Decode(&s); err != nil {
+		return nil, fmt.Errorf("parse spec: %w", err)
+	}
+	return &s, nil
+}
+
+// SpecSchema returns a hand-written JSON Schema (draft 2020-12). Kept in code
+// rather than generated so the schema and the Go types are co-located and
+// drift between them shows up in PR review.
+func SpecSchema() json.RawMessage {
+	return json.RawMessage(specSchemaJSON)
+}
+
+// ValidateSpec returns structured diagnostics describing missing required
+// fields, dangling refs, and bus/device inconsistencies. Returns nil if the
+// spec is well-formed (validation against the target catalog happens later
+// in the plan pass).
+func ValidateSpec(s *Spec) []Diagnostic {
+	var diags []Diagnostic
+	add := func(sev, msg, loc string) {
+		diags = append(diags, Diagnostic{Severity: sev, Category: "spec", Message: msg, Location: loc})
+	}
+
+	if s.SchemaVersion != 1 {
+		add("error", "schemaVersion must be 1", "$.schemaVersion")
+	}
+	if s.Name == "" {
+		add("error", "name is required", "$.name")
+	}
+	if s.Target == "" {
+		add("error", "target is required", "$.target")
+	}
+	if len(s.Buses) == 0 {
+		add("error", "at least one bus is required", "$.buses")
+	}
+	if len(s.Devices) == 0 {
+		add("error", "at least one device is required", "$.devices")
+	}
+	if s.Agent.Reasoning.Capability == "" {
+		add("error", "agent.reasoning.capability is required (chat|reasoning|classification|embedding)", "$.agent.reasoning.capability")
+	}
+
+	busByID := map[string]Bus{}
+	for i, b := range s.Buses {
+		loc := fmt.Sprintf("$.buses[%d]", i)
+		if b.ID == "" {
+			add("error", "bus id is required", loc+".id")
+			continue
+		}
+		if _, dup := busByID[b.ID]; dup {
+			add("error", fmt.Sprintf("duplicate bus id %q", b.ID), loc+".id")
+		}
+		busByID[b.ID] = b
+		switch b.Type {
+		case "mqtt":
+			if b.BrokerURL == "" {
+				add("error", "mqtt bus requires brokerUrl", loc+".brokerUrl")
+			}
+		case "gpio":
+			// chip defaults to target's first gpiochip; nothing required
+		case "serial":
+			// device defaults to target's first serial; nothing required
+		case "":
+			add("error", "bus type is required (mqtt|gpio|serial)", loc+".type")
+		default:
+			add("error", fmt.Sprintf("unknown bus type %q (mqtt|gpio|serial)", b.Type), loc+".type")
+		}
+	}
+
+	zoneByID := map[string]bool{}
+	for _, z := range s.Zones {
+		zoneByID[z.ID] = true
+	}
+
+	devByID := map[string]bool{}
+	for i, d := range s.Devices {
+		loc := fmt.Sprintf("$.devices[%d]", i)
+		if d.ID == "" {
+			add("error", "device id is required", loc+".id")
+			continue
+		}
+		if devByID[d.ID] {
+			add("error", fmt.Sprintf("duplicate device id %q", d.ID), loc+".id")
+		}
+		devByID[d.ID] = true
+		if d.Zone != "" && !zoneByID[d.Zone] {
+			add("warn", fmt.Sprintf("device %q references unknown zone %q", d.ID, d.Zone), loc+".zone")
+		}
+		switch d.Kind {
+		case "sensor":
+			if d.Measures == "" {
+				add("warn", fmt.Sprintf("sensor %q has no 'measures' set", d.ID), loc+".measures")
+			}
+		case "actuator":
+			if d.Controls == "" {
+				add("warn", fmt.Sprintf("actuator %q has no 'controls' set", d.ID), loc+".controls")
+			}
+		case "controller":
+			// nothing required
+		case "":
+			add("error", "device kind is required (sensor|actuator|controller)", loc+".kind")
+		default:
+			add("error", fmt.Sprintf("unknown device kind %q", d.Kind), loc+".kind")
+		}
+		bus, ok := busByID[d.Bus.Ref]
+		if !ok {
+			add("error", fmt.Sprintf("device %q references unknown bus %q", d.ID, d.Bus.Ref), loc+".bus.ref")
+			continue
+		}
+		switch bus.Type {
+		case "mqtt":
+			if d.Bus.Topic == "" {
+				add("error", fmt.Sprintf("device %q on mqtt bus requires bus.topic", d.ID), loc+".bus.topic")
+			}
+		case "gpio":
+			if d.Bus.Line == nil {
+				add("error", fmt.Sprintf("device %q on gpio bus requires bus.line", d.ID), loc+".bus.line")
+			}
+		}
+		if d.Kind == "actuator" && !d.Bus.Writable {
+			add("warn", fmt.Sprintf("actuator %q on bus %q is not marked writable", d.ID, d.Bus.Ref), loc+".bus.writable")
+		}
+	}
+
+	return diags
+}
+
+var errSpecInvalid = errors.New("spec validation failed")
+
+// specInitTemplate is the YAML emitted by `fh-agent spec init`. Kept compact
+// and heavily commented so a human (or an LLM) can fill it in without
+// reading external docs first.
+const specInitTemplate = `schemaVersion: 1
+
+# Human-readable site name (used as the bundle directory name).
+name: my-site
+
+# Hardware target. Run 'fh-agent targets list' for available ids.
+target: rpi5-8gb
+
+description: ""
+
+# What the agent is trying to achieve. Each goal becomes part of the
+# reasoning prompt. Keep them short and behavioral.
+goals: []
+#   - id: comfort
+#     description: Keep occupied rooms comfortable.
+
+# Hard rules the agent must respect. Free-text in v1 — enforced via prompt,
+# not via structural constraints. Tighten in a later version.
+constraints: []
+#   - id: heating-min
+#     description: Heating setpoint must never go below 5 °C.
+
+# Optional zone (room) labels. Devices reference a zone for spatial context.
+zones: []
+#   - id: livingroom
+#     name: Wohnzimmer
+
+# Buses are transports reachable from this site. Each device binds to one.
+buses: []
+#   - id: home-mqtt
+#     type: mqtt
+#     brokerUrl: tcp://localhost:1883
+#   - id: gpio
+#     type: gpio
+#   - id: serial
+#     type: serial
+
+# Physical devices the agent reads or controls.
+devices: []
+#   - id: temp-livingroom
+#     zone: livingroom
+#     kind: sensor
+#     measures: temperature
+#     unit: C
+#     bus:
+#       ref: home-mqtt
+#       topic: home/living/temperature
+#   - id: heating-livingroom
+#     zone: livingroom
+#     kind: actuator
+#     controls: heating
+#     unit: C
+#     bus:
+#       ref: home-mqtt
+#       topic: home/living/heating/setpoint
+#       writable: true
+
+agent:
+  reasoning:
+    capability: chat      # chat | reasoning | classification | embedding
+    promptHint: ""
+  evaluationEvery: 60s
+`
+
+// Hand-written JSON Schema for the spec. Edit alongside the Go types above.
+const specSchemaJSON = `{
+  "$schema": "https://json-schema.org/draft/2020-12/schema",
+  "title": "site.spec.yaml",
+  "type": "object",
+  "required": ["schemaVersion", "name", "target", "buses", "devices", "agent"],
+  "additionalProperties": false,
+  "properties": {
+    "schemaVersion": {"type": "integer", "const": 1},
+    "name":          {"type": "string", "minLength": 1},
+    "target":        {"type": "string", "minLength": 1, "description": "Hardware target id from 'fh-agent targets list'"},
+    "description":   {"type": "string"},
+    "goals": {
+      "type": "array",
+      "items": {
+        "type": "object",
+        "required": ["id", "description"],
+        "additionalProperties": false,
+        "properties": {
+          "id":          {"type": "string", "minLength": 1},
+          "description": {"type": "string", "minLength": 1}
+        }
+      }
+    },
+    "constraints": {
+      "type": "array",
+      "items": {
+        "type": "object",
+        "required": ["id", "description"],
+        "additionalProperties": false,
+        "properties": {
+          "id":          {"type": "string", "minLength": 1},
+          "description": {"type": "string", "minLength": 1}
+        }
+      }
+    },
+    "zones": {
+      "type": "array",
+      "items": {
+        "type": "object",
+        "required": ["id", "name"],
+        "additionalProperties": false,
+        "properties": {
+          "id":   {"type": "string", "minLength": 1},
+          "name": {"type": "string", "minLength": 1}
+        }
+      }
+    },
+    "buses": {
+      "type": "array",
+      "minItems": 1,
+      "items": {
+        "type": "object",
+        "required": ["id", "type"],
+        "additionalProperties": false,
+        "properties": {
+          "id":        {"type": "string", "minLength": 1},
+          "type":      {"type": "string", "enum": ["mqtt", "gpio", "serial"]},
+          "brokerUrl": {"type": "string"},
+          "username":  {"type": "string"},
+          "password":  {"type": "string"},
+          "chip":      {"type": "string"},
+          "device":    {"type": "string"},
+          "baud":      {"type": "integer", "minimum": 0}
+        }
+      }
+    },
+    "devices": {
+      "type": "array",
+      "minItems": 1,
+      "items": {
+        "type": "object",
+        "required": ["id", "kind", "bus"],
+        "additionalProperties": false,
+        "properties": {
+          "id":       {"type": "string", "minLength": 1},
+          "zone":     {"type": "string"},
+          "kind":     {"type": "string", "enum": ["sensor", "actuator", "controller"]},
+          "measures": {"type": "string"},
+          "controls": {"type": "string"},
+          "unit":     {"type": "string"},
+          "bus": {
+            "type": "object",
+            "required": ["ref"],
+            "additionalProperties": false,
+            "properties": {
+              "ref":      {"type": "string", "minLength": 1},
+              "topic":    {"type": "string"},
+              "line":     {"type": "integer", "minimum": 0},
+              "writable": {"type": "boolean"}
+            }
+          }
+        }
+      }
+    },
+    "agent": {
+      "type": "object",
+      "required": ["reasoning"],
+      "additionalProperties": false,
+      "properties": {
+        "reasoning": {
+          "type": "object",
+          "required": ["capability"],
+          "additionalProperties": false,
+          "properties": {
+            "capability": {"type": "string", "enum": ["chat", "reasoning", "classification", "embedding"]},
+            "promptHint": {"type": "string"}
+          }
+        },
+        "evaluationEvery": {"type": "string", "pattern": "^[0-9]+(s|m|h)$"}
+      }
+    }
+  }
+}
+`
diff --git a/go/cmd/fh-agent/targets.go b/go/cmd/fh-agent/targets.go
new file mode 100644
index 0000000..3940049
--- /dev/null
+++ b/go/cmd/fh-agent/targets.go
@@ -0,0 +1,211 @@
+package main
+
+import (
+	"bytes"
+	"embed"
+	"fmt"
+	"io/fs"
+	"sort"
+	"strings"
+
+	"gopkg.in/yaml.v3"
+)
+
+//go:embed targets/*.yaml
+var targetsFS embed.FS
+
+// Target is the embedded hardware-profile shape. Each YAML in targets/
+// unmarshals into one of these.
+type Target struct {
+	ID          string         `yaml:"id" json:"id"`
+	DisplayName string         `yaml:"displayName" json:"displayName"`
+	Arch        string         `yaml:"arch" json:"arch"` // arm64 | amd64
+	OS          string         `yaml:"os" json:"os"`
+	Runtime     string         `yaml:"runtime" json:"runtime"` // docker | podman | snap
+	CPU         TargetCPU      `yaml:"cpu" json:"cpu"`
+	RAM         TargetRAM      `yaml:"ram" json:"ram"`
+	Accel       TargetAccel    `yaml:"accel" json:"accel"`
+	Hardware    TargetHardware `yaml:"hardware" json:"hardware"`
+	SLMs        []TargetSLM    `yaml:"slms" json:"slms"`
+	SLMRuntime  TargetSLMRT    `yaml:"slmRuntime" json:"slmRuntime"`
+	Notes       string         `yaml:"notes,omitempty" json:"notes,omitempty"`
+	NotesIO     string         `yaml:"notes_io,omitempty" json:"notes_io,omitempty"`
+	IndustrialBuses []string   `yaml:"industrialBuses,omitempty" json:"industrialBuses,omitempty"`
+}
+
+type TargetCPU struct {
+	Model   string `yaml:"model" json:"model"`
+	Cores   int    `yaml:"cores" json:"cores"`
+	FreqMHz int    `yaml:"freqMHz" json:"freqMHz"`
+}
+
+type TargetRAM struct {
+	TotalMB    int `yaml:"totalMB" json:"totalMB"`
+	ReservedMB int `yaml:"reservedMB" json:"reservedMB"`
+}
+
+func (r TargetRAM) availableMB() int {
+	return r.TotalMB - r.ReservedMB
+}
+
+type TargetAccel struct {
+	Type   string `yaml:"type" json:"type"` // none | cuda | npu | igpu
+	Device string `yaml:"device,omitempty" json:"device,omitempty"`
+	TOPS   float64 `yaml:"tops,omitempty" json:"tops,omitempty"`
+	Notes  string `yaml:"notes,omitempty" json:"notes,omitempty"`
+}
+
+type TargetHardware struct {
+	GPIOs   []TargetGPIO   `yaml:"gpios" json:"gpios"`
+	Serials []TargetSerial `yaml:"serials" json:"serials"`
+	PWMs    []TargetPWM    `yaml:"pwms" json:"pwms"`
+	ADCs    []TargetADC    `yaml:"adcs" json:"adcs"`
+	DACs    []TargetDAC    `yaml:"dacs" json:"dacs"`
+	I2C     []string       `yaml:"i2c,omitempty" json:"i2c,omitempty"`
+	SPI     []string       `yaml:"spi,omitempty" json:"spi,omitempty"`
+}
+
+type TargetGPIO struct {
+	ID    string `yaml:"id" json:"id"`
+	Chip  string `yaml:"chip" json:"chip"`
+	Lines int    `yaml:"lines" json:"lines"`
+}
+type TargetSerial struct {
+	ID          string `yaml:"id" json:"id"`
+	Device      string `yaml:"device" json:"device"`
+	DefaultBaud int    `yaml:"defaultBaud" json:"defaultBaud"`
+}
+type TargetPWM struct {
+	ID   string `yaml:"id" json:"id"`
+	Chip string `yaml:"chip" json:"chip"`
+}
+type TargetADC struct {
+	ID     string `yaml:"id" json:"id"`
+	Device string `yaml:"device" json:"device"`
+}
+type TargetDAC struct {
+	ID     string `yaml:"id" json:"id"`
+	Device string `yaml:"device" json:"device"`
+}
+
+type TargetSLM struct {
+	ID           string   `yaml:"id" json:"id"`
+	Capabilities []string `yaml:"capabilities" json:"capabilities"`
+	RAMMB        int      `yaml:"ramMB" json:"ramMB"`
+	EstTokPerSec float64  `yaml:"estTokPerSec,omitempty" json:"estTokPerSec,omitempty"`
+	Dimension    int      `yaml:"dimension,omitempty" json:"dimension,omitempty"`
+	Runtime      string   `yaml:"runtime,omitempty" json:"runtime,omitempty"`
+	Notes        string   `yaml:"notes,omitempty" json:"notes,omitempty"`
+}
+
+type TargetSLMRT struct {
+	Image      string `yaml:"image" json:"image"`
+	ServePort  int    `yaml:"servePort" json:"servePort"`
+	GPURequest string `yaml:"gpuRequest,omitempty" json:"gpuRequest,omitempty"`
+}
+
+// loadAllTargets reads every embedded *.yaml under targets/ exactly once.
+// Strict mode (KnownFields) catches typos in profile files at compile-time
+// of the binary, not at runtime in a customer environment.
+func loadAllTargets() (map[string]*Target, error) {
+	out := map[string]*Target{}
+	err := fs.WalkDir(targetsFS, "targets", func(path string, d fs.DirEntry, err error) error {
+		if err != nil || d.IsDir() {
+			return err
+		}
+		if !strings.HasSuffix(path, ".yaml") {
+			return nil
+		}
+		raw, rerr := targetsFS.ReadFile(path)
+		if rerr != nil {
+			return fmt.Errorf("read %s: %w", path, rerr)
+		}
+		dec := yaml.NewDecoder(bytes.NewReader(raw))
+		dec.KnownFields(true)
+		var t Target
+		if derr := dec.Decode(&t); derr != nil {
+			return fmt.Errorf("parse %s: %w", path, derr)
+		}
+		if t.ID == "" {
+			return fmt.Errorf("%s: missing id", path)
+		}
+		if _, dup := out[t.ID]; dup {
+			return fmt.Errorf("%s: duplicate target id %q", path, t.ID)
+		}
+		out[t.ID] = &t
+		return nil
+	})
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
+// listTargets returns target ids sorted alphabetically for deterministic
+// output.
+func listTargets() ([]*Target, error) {
+	all, err := loadAllTargets()
+	if err != nil {
+		return nil, err
+	}
+	out := make([]*Target, 0, len(all))
+	for _, t := range all {
+		out = append(out, t)
+	}
+	sort.Slice(out, func(i, j int) bool { return out[i].ID < out[j].ID })
+	return out, nil
+}
+
+func getTarget(id string) (*Target, error) {
+	all, err := loadAllTargets()
+	if err != nil {
+		return nil, err
+	}
+	t, ok := all[id]
+	if !ok {
+		ids := make([]string, 0, len(all))
+		for k := range all {
+			ids = append(ids, k)
+		}
+		sort.Strings(ids)
+		return nil, fmt.Errorf("unknown target %q; available: %s", id, strings.Join(ids, ", "))
+	}
+	return t, nil
+}
+
+// suggestModels picks SLMs from the target whose capability set covers the
+// requested capability and whose RAM footprint fits the available budget.
+// Results are sorted by best-fit: smaller RAM first (leaves headroom),
+// then higher estimated throughput.
+func suggestModels(t *Target, capability string, maxRAMMB int) []TargetSLM {
+	avail := t.RAM.availableMB()
+	if maxRAMMB > 0 && maxRAMMB < avail {
+		avail = maxRAMMB
+	}
+	var out []TargetSLM
+	for _, m := range t.SLMs {
+		if !contains(m.Capabilities, capability) {
+			continue
+		}
+		if m.RAMMB > avail {
+			continue
+		}
+		out = append(out, m)
+	}
+	sort.SliceStable(out, func(i, j int) bool {
+		if out[i].RAMMB != out[j].RAMMB {
+			return out[i].RAMMB < out[j].RAMMB
+		}
+		return out[i].EstTokPerSec > out[j].EstTokPerSec
+	})
+	return out
+}
+
+func contains(xs []string, x string) bool {
+	for _, v := range xs {
+		if v == x {
+			return true
+		}
+	}
+	return false
+}
diff --git a/go/cmd/fh-agent/targets/ctrlx-core-arm64.yaml b/go/cmd/fh-agent/targets/ctrlx-core-arm64.yaml
new file mode 100644
index 0000000..ae5dfaf
--- /dev/null
+++ b/go/cmd/fh-agent/targets/ctrlx-core-arm64.yaml
@@ -0,0 +1,68 @@
+id: ctrlx-core-arm64
+displayName: Bosch Rexroth ctrlX CORE (ARM64, ctrlX OS)
+arch: arm64
+os: linux
+runtime: docker
+cpu:
+  model: NXP i.MX 8M Plus (Cortex-A53 quad-core)
+  cores: 4
+  freqMHz: 1600
+ram:
+  totalMB: 2048
+  reservedMB: 512
+accel:
+  type: npu
+  device: imx8mp-vpu
+  tops: 2.3
+  notes: |
+    NXP Neural Processing Unit on i.MX 8M Plus. Used via ONNX Runtime / NNAPI;
+    not OpenAI-API compatible. Best for classifier/vision side-tasks.
+hardware:
+  gpios:
+    - id: gpiochip0
+      chip: gpiochip0
+      lines: 24
+  serials:
+    - id: rs232
+      device: /dev/ttymxc0
+      defaultBaud: 115200
+    - id: rs485
+      device: /dev/ttymxc1
+      defaultBaud: 115200
+  pwms: []
+  adcs: []
+  dacs: []
+  i2c:
+    - /dev/i2c-1
+  spi:
+    - /dev/spidev0.0
+industrialBuses:
+  - ethercat
+  - profinet
+  - opc-ua
+  - modbus-tcp
+slms:
+  - id: llama-3.2-1b-instruct-q4
+    capabilities: [chat, function_call]
+    ramMB: 1200
+    estTokPerSec: 7
+  - id: tinyllama-1.1b-chat-q4
+    capabilities: [chat]
+    ramMB: 720
+    estTokPerSec: 9
+  - id: distil-bert-cls-q8
+    capabilities: [classification]
+    ramMB: 95
+  - id: nomic-embed-text-v1.5-q4
+    capabilities: [embedding]
+    dimension: 768
+    ramMB: 220
+slmRuntime:
+  image: ghcr.io/ggerganov/llama.cpp:server
+  servePort: 8080
+notes: |
+  Industrial controller running ctrlX OS (Ubuntu-Core based). Apps deploy as
+  Snap or Docker (Docker engine available via 'docker-cli' snap). Fieldbus
+  IO (EtherCAT, PROFINET, OPC-UA, Modbus-TCP) is reached via the ctrlX OS
+  Data Layer rather than direct GPIO — wire those to MQTT or HTTP channels
+  in the workflow and let a ctrlX Data-Layer bridge translate.
diff --git a/go/cmd/fh-agent/targets/jetson-orin-nano-8gb.yaml b/go/cmd/fh-agent/targets/jetson-orin-nano-8gb.yaml
new file mode 100644
index 0000000..f6ff3a4
--- /dev/null
+++ b/go/cmd/fh-agent/targets/jetson-orin-nano-8gb.yaml
@@ -0,0 +1,67 @@
+id: jetson-orin-nano-8gb
+displayName: NVIDIA Jetson Orin Nano (8 GB)
+arch: arm64
+os: linux
+runtime: docker
+cpu:
+  model: Cortex-A78AE 6-core
+  cores: 6
+  freqMHz: 1500
+ram:
+  totalMB: 8192
+  reservedMB: 1536
+accel:
+  type: cuda
+  device: orin
+  tops: 40
+  notes: 1024-core Ampere GPU + 32 Tensor Cores. INT8 sparse 40 TOPS. CUDA, TensorRT, vLLM supported.
+hardware:
+  gpios:
+    - id: gpiochip0
+      chip: gpiochip0
+      lines: 40
+  serials:
+    - id: uart-header
+      device: /dev/ttyTHS1
+      defaultBaud: 115200
+  pwms:
+    - id: pwmchip0
+      chip: /sys/class/pwm/pwmchip0
+  adcs: []
+  dacs: []
+  i2c:
+    - /dev/i2c-1
+    - /dev/i2c-7
+  spi:
+    - /dev/spidev0.0
+slms:
+  - id: llama-3.2-3b-instruct-q4
+    capabilities: [chat, function_call, reasoning]
+    ramMB: 2800
+    estTokPerSec: 60
+    runtime: llama.cpp
+  - id: llama-3.1-8b-instruct-q4
+    capabilities: [chat, function_call, reasoning]
+    ramMB: 5800
+    estTokPerSec: 22
+    runtime: llama.cpp
+  - id: qwen2.5-7b-instruct-awq
+    capabilities: [chat, function_call, reasoning, code]
+    ramMB: 6200
+    estTokPerSec: 35
+    runtime: vllm
+  - id: nomic-embed-text-v1.5
+    capabilities: [embedding]
+    dimension: 768
+    ramMB: 350
+  - id: distil-bert-cls
+    capabilities: [classification]
+    ramMB: 95
+slmRuntime:
+  image: dustynv/llama_cpp:r36.4.0
+  servePort: 8080
+  gpuRequest: all
+notes: |
+  Top edge-AI option for industrial / robotics / vision-language scenarios.
+  CUDA acceleration enables 7B-class models. Use TensorRT-LLM or vLLM for
+  production. JetPack 6 / Ubuntu 22.04 base.
diff --git a/go/cmd/fh-agent/targets/rpi5-8gb.yaml b/go/cmd/fh-agent/targets/rpi5-8gb.yaml
new file mode 100644
index 0000000..b274701
--- /dev/null
+++ b/go/cmd/fh-agent/targets/rpi5-8gb.yaml
@@ -0,0 +1,64 @@
+id: rpi5-8gb
+displayName: Raspberry Pi 5 (8 GB)
+arch: arm64
+os: linux
+runtime: docker
+cpu:
+  model: BCM2712 (Cortex-A76 quad-core)
+  cores: 4
+  freqMHz: 2400
+ram:
+  totalMB: 8192
+  reservedMB: 1024
+accel:
+  type: none
+  notes: VideoCore VII GPU present but not used for LLM inference (no mature CUDA/Metal path).
+hardware:
+  gpios:
+    - id: gpiochip0
+      chip: gpiochip0
+      lines: 28
+  serials:
+    - id: uart-onboard
+      device: /dev/ttyAMA0
+      defaultBaud: 115200
+    - id: uart-usb
+      device: /dev/ttyUSB0
+      defaultBaud: 115200
+  pwms:
+    - id: pwmchip0
+      chip: /sys/class/pwm/pwmchip0
+  adcs: []
+  dacs: []
+  i2c:
+    - /dev/i2c-1
+  spi:
+    - /dev/spidev0.0
+    - /dev/spidev0.1
+slms:
+  - id: llama-3.2-1b-instruct-q4
+    capabilities: [chat, function_call]
+    ramMB: 1200
+    estTokPerSec: 28
+  - id: llama-3.2-3b-instruct-q4
+    capabilities: [chat, function_call, reasoning]
+    ramMB: 2800
+    estTokPerSec: 11
+  - id: qwen2.5-3b-instruct-q5
+    capabilities: [chat, function_call, code]
+    ramMB: 3400
+    estTokPerSec: 9
+  - id: nomic-embed-text-v1.5-q8
+    capabilities: [embedding]
+    dimension: 768
+    ramMB: 280
+  - id: distil-bert-cls-q8
+    capabilities: [classification]
+    ramMB: 95
+slmRuntime:
+  image: ghcr.io/ggerganov/llama.cpp:server
+  servePort: 8080
+notes: |
+  General-purpose ARM SBC. Workhorse for home automation and light edge AI.
+  No GPU/NPU acceleration for LLMs — CPU-only via llama.cpp.
+  GPIO via libgpiod (gpiochip0). On-board ADC requires HAT.
diff --git a/go/cmd/fh-agent/targets/stm32mp25-1gb.yaml b/go/cmd/fh-agent/targets/stm32mp25-1gb.yaml
new file mode 100644
index 0000000..32686fa
--- /dev/null
+++ b/go/cmd/fh-agent/targets/stm32mp25-1gb.yaml
@@ -0,0 +1,63 @@
+id: stm32mp25-1gb
+displayName: ST STM32MP25 (1 GB, Neural-ART NPU)
+arch: arm64
+os: linux
+runtime: docker
+cpu:
+  model: Cortex-A35 dual-core + Cortex-M33 (Linux runs on A35)
+  cores: 2
+  freqMHz: 1500
+ram:
+  totalMB: 1024
+  reservedMB: 256
+accel:
+  type: npu
+  device: neural-art
+  tops: 1.35
+  notes: |
+    ST Neural-ART NPU. Operates on quantized models exported via STM32Cube.AI.
+    Not OpenAI-API compatible — used for classifier/vision nodes, not chat LLMs.
+hardware:
+  gpios:
+    - id: gpiochip0
+      chip: gpiochip0
+      lines: 32
+  serials:
+    - id: uart4
+      device: /dev/ttySTM0
+      defaultBaud: 115200
+  pwms:
+    - id: pwmchip0
+      chip: /sys/class/pwm/pwmchip0
+  adcs:
+    - id: adc1
+      device: /sys/bus/iio/devices/iio:device0
+  dacs:
+    - id: dac1
+      device: /sys/bus/iio/devices/iio:device1
+  i2c:
+    - /dev/i2c-1
+  spi:
+    - /dev/spidev0.0
+slms:
+  - id: tinyllama-1.1b-chat-q4
+    capabilities: [chat]
+    ramMB: 720
+    estTokPerSec: 4
+    notes: Tight fit; chat is slow but functional for simple intent extraction.
+  - id: distil-bert-cls-q8
+    capabilities: [classification]
+    ramMB: 95
+    estTokPerSec: 0
+  - id: nomic-embed-text-v1.5-q4
+    capabilities: [embedding]
+    dimension: 768
+    ramMB: 220
+slmRuntime:
+  image: ghcr.io/ggerganov/llama.cpp:server
+  servePort: 8080
+notes: |
+  Microprocessor-class device (Linux on A35). Native ADC/DAC + on-board NPU.
+  Strong fit for sensor-fusion + classification edge tasks.
+  Chat-class LLMs only marginally usable — prefer classification / embedding
+  workflows here, route reasoning to cloud or to a higher-RAM peer.
diff --git a/go/cmd/fh-agent/targets/x86-nuc-16gb.yaml b/go/cmd/fh-agent/targets/x86-nuc-16gb.yaml
new file mode 100644
index 0000000..9273d32
--- /dev/null
+++ b/go/cmd/fh-agent/targets/x86-nuc-16gb.yaml
@@ -0,0 +1,59 @@
+id: x86-nuc-16gb
+displayName: Intel NUC / x86 mini-PC (16 GB)
+arch: amd64
+os: linux
+runtime: docker
+cpu:
+  model: Intel Core i5-1340P class (12-core, P+E)
+  cores: 12
+  freqMHz: 4600
+ram:
+  totalMB: 16384
+  reservedMB: 2048
+accel:
+  type: igpu
+  device: intel-iris-xe
+  notes: Iris Xe iGPU. ipex-llm enables INT4 LLM inference; not NPU-class but capable.
+hardware:
+  gpios: []
+  serials:
+    - id: uart-usb-a
+      device: /dev/ttyUSB0
+      defaultBaud: 115200
+    - id: uart-usb-b
+      device: /dev/ttyUSB1
+      defaultBaud: 115200
+  pwms: []
+  adcs: []
+  dacs: []
+  i2c: []
+  spi: []
+notes_io: |
+  No on-board GPIO/I2C/SPI/ADC. Industrial IO via USB-CAN, USB-RS485,
+  Ethernet/Modbus, or USB-GPIO adapters (FT232H, MCP2221).
+slms:
+  - id: llama-3.2-3b-instruct-q4
+    capabilities: [chat, function_call, reasoning]
+    ramMB: 2800
+    estTokPerSec: 25
+  - id: llama-3.1-8b-instruct-q4
+    capabilities: [chat, function_call, reasoning]
+    ramMB: 5800
+    estTokPerSec: 12
+  - id: qwen2.5-7b-instruct-q5
+    capabilities: [chat, function_call, reasoning, code]
+    ramMB: 6500
+    estTokPerSec: 10
+  - id: nomic-embed-text-v1.5
+    capabilities: [embedding]
+    dimension: 768
+    ramMB: 350
+  - id: bge-reranker-base
+    capabilities: [classification, reasoning]
+    ramMB: 600
+slmRuntime:
+  image: ghcr.io/ggerganov/llama.cpp:server
+  servePort: 8080
+notes: |
+  Office-grade gateway. Most RAM-comfortable v1 target.
+  Best for content-heavy agents (RAG, document QA, vision-language).
diff --git a/go/cmd/fh-agent/templates/compose.yml.tmpl b/go/cmd/fh-agent/templates/compose.yml.tmpl
new file mode 100644
index 0000000..3a86f44
--- /dev/null
+++ b/go/cmd/fh-agent/templates/compose.yml.tmpl
@@ -0,0 +1,83 @@
+# Generated by fh-agent. Do not edit by hand — re-run `fh-agent build`.
+#
+# Stack layout:
+#   engine    — official ForestHub edge-agent engine, configs mounted from ./
+#   llm       — local SLM server (llama.cpp / Ollama / vLLM image per target)
+#   mosquitto — optional local MQTT broker; remove if you connect to an
+#               external broker (then update site.resources.yaml accordingly).
+
+services:
+  engine:
+    image: ghcr.io/foresthubai/edge-agents/engine:latest
+    platform: linux/{{ .Arch }}
+    container_name: {{ .Name }}-engine
+    restart: unless-stopped
+    environment:
+      ENGINE_STANDALONE: "true"
+      ENGINE_ADDR: ":8081"
+      ENGINE_CONFIG_FILE: /etc/forest/agent.workflow.json
+      ENGINE_DEPLOYMENT_MAPPING_FILE: /etc/forest/site.mapping.json
+      ENGINE_EXTERNAL_RESOURCES_FILE: /etc/forest/site.resources.yaml
+      ENGINE_DEVICE_MANIFEST_FILE: /etc/forest/device.manifest.json
+      ENGINE_LOG_LEVEL: info
+    env_file:
+      - .env
+    volumes:
+      - ./agent.workflow.json:/etc/forest/agent.workflow.json:ro
+      - ./site.mapping.json:/etc/forest/site.mapping.json:ro
+      - ./site.resources.yaml:/etc/forest/site.resources.yaml:ro
+      - ./device.manifest.json:/etc/forest/device.manifest.json:ro
+      - engine-memory:/var/forest/memory
+{{- if .NeedsGPIO }}
+    devices:
+      - /dev/gpiochip0:/dev/gpiochip0
+{{- end }}
+{{- if .NeedsSerial }}
+      - /dev/ttyAMA0:/dev/ttyAMA0
+{{- end }}
+    ports:
+      - "8081:8081"
+    depends_on:
+      - llm
+{{- if .NeedsMQTT }}
+      - mosquitto
+{{- end }}
+
+  llm:
+    image: {{ .SLMImage }}
+    platform: linux/{{ .Arch }}
+    container_name: {{ .Name }}-llm
+    restart: unless-stopped
+    command: ["--host", "0.0.0.0", "--port", "{{ .SLMPort }}", "--model", "/models/{{ .ModelID }}.gguf"]
+    volumes:
+      - ./models:/models:ro
+    ports:
+      - "{{ .SLMPort }}:{{ .SLMPort }}"
+{{- if .GPURequest }}
+    deploy:
+      resources:
+        reservations:
+          devices:
+            - driver: nvidia
+              count: {{ .GPURequest }}
+              capabilities: [gpu]
+{{- end }}
+
+{{- if .NeedsMQTT }}
+
+  mosquitto:
+    image: eclipse-mosquitto:2
+    container_name: {{ .Name }}-mqtt
+    restart: unless-stopped
+    ports:
+      - "1883:1883"
+    volumes:
+      - ./mosquitto.conf:/mosquitto/config/mosquitto.conf:ro
+      - mosquitto-data:/mosquitto/data
+{{- end }}
+
+volumes:
+  engine-memory:
+{{- if .NeedsMQTT }}
+  mosquitto-data:
+{{- end }}
diff --git a/go/cmd/fh-agent/templates/env.example.tmpl b/go/cmd/fh-agent/templates/env.example.tmpl
new file mode 100644
index 0000000..6f8c3e5
--- /dev/null
+++ b/go/cmd/fh-agent/templates/env.example.tmpl
@@ -0,0 +1,12 @@
+# Generated by fh-agent. Copy to .env and fill in.
+#
+# Cloud LLM provider keys — only needed if your workflow uses them in
+# addition to the local SLM. Leave blank to disable.
+ANTHROPIC_API_KEY=
+OPENAI_API_KEY=
+GEMINI_API_KEY=
+MISTRAL_API_KEY=
+
+# Web-search node provider (optional).
+ENGINE_WEB_SEARCH_PROVIDER=brave
+ENGINE_WEB_SEARCH_API_KEY=
diff --git a/go/cmd/fh-agent/templates/mosquitto.conf.tmpl b/go/cmd/fh-agent/templates/mosquitto.conf.tmpl
new file mode 100644
index 0000000..039a5cf
--- /dev/null
+++ b/go/cmd/fh-agent/templates/mosquitto.conf.tmpl
@@ -0,0 +1,4 @@
+listener 1883
+allow_anonymous true
+persistence true
+persistence_location /mosquitto/data/
diff --git a/go/cmd/fh-agent/templates/readme.md.tmpl b/go/cmd/fh-agent/templates/readme.md.tmpl
new file mode 100644
index 0000000..f871ca8
--- /dev/null
+++ b/go/cmd/fh-agent/templates/readme.md.tmpl
@@ -0,0 +1,60 @@
+# {{ .Name }}
+
+Edge-AI agent bundle, generated by `fh-agent` for target **{{ .TargetID }}** ({{ .TargetArch }}).
+
+## What's in this bundle
+
+| File | Purpose |
+| --- | --- |
+| `compose.yml` | Docker Compose stack: engine + local LLM (+ optional MQTT broker) |
+| `agent.workflow.json` | The workflow graph (binding-free) |
+| `site.mapping.json` | Binds workflow channels to platform resources |
+| `site.resources.yaml` | MQTT broker URLs and other deploy-time configs |
+| `device.manifest.json` | Hardware resources this device exposes |
+| `local-models.yaml` | Local SLM registry (capabilities, endpoints) |
+| `bundle.meta.json` | Metadata fh-agent uses; safe to inspect |
+| `.env.example` | Secrets template — copy to `.env` and fill in |
+
+## Run it
+
+1. Copy this whole directory to the target device (`scp -r` is fine).
+2. Place model weights under `./models/{{ .ModelID }}.gguf`.
+   {{- if .ModelDownloadHint }}
+   Download hint: {{ .ModelDownloadHint }}
+   {{- end }}
+3. Copy `.env.example` to `.env` and fill in any secrets.
+4. Bring the stack up:
+   ```sh
+   docker compose up -d
+   ```
+5. Engine HTTP API is on `:8081`. Health check:
+   ```sh
+   curl http://localhost:8081/healthz
+   ```
+
+## Architecture chosen
+
+- **Reasoning model:** `{{ .ModelID }}` ({{ .ModelRAMMB }} MB RAM)
+- **SLM runtime image:** `{{ .SLMImage }}` on port {{ .SLMPort }}
+- **Accelerator:** {{ .AccelType }}{{ if .AccelDevice }} ({{ .AccelDevice }}){{ end }}
+
+## Re-generating
+
+If you change `site.spec.yaml`, re-run the pipeline:
+
+```sh
+fh-agent plan   site.spec.yaml --target {{ .TargetID }} --out build/
+fh-agent validate build/
+fh-agent build  build/ --name {{ .Name }} --out dist/
+```
+
+Every file in this bundle is regenerated from `site.spec.yaml`. Edits made
+to the generated files will be overwritten on the next build.
+
+## Known limits (v1)
+
+- Workflow JSON is structurally valid per fh-agent's checks but is **not**
+  validated against the OpenAPI contract here. Run `fh-workflow validate
+  agent.workflow.json` (from the edge-agents TypeScript CLI) separately to
+  catch any contract drift.
+- Provisioning, OTA updates, and HIL test runs are scoped for later versions.
diff --git a/go/cmd/fh-agent/validate.go b/go/cmd/fh-agent/validate.go
new file mode 100644
index 0000000..07b1ccd
--- /dev/null
+++ b/go/cmd/fh-agent/validate.go
@@ -0,0 +1,269 @@
+package main
+
+import (
+	"encoding/json"
+	"flag"
+	"fmt"
+	"os"
+	"os/exec"
+	"path/filepath"
+
+	"gopkg.in/yaml.v3"
+)
+
+// runValidate cross-checks a build/ directory produced by `fh-agent plan`.
+//
+// What this DOES check:
+//   - every workflow channel id has a mapping entry
+//   - every mapping ref resolves to either an external resource or a manifest entry
+//   - chosen model exists in local-models.yaml and fits target RAM
+//   - bundle metadata schema version is current
+//   - contract-schema validation via `fh-builder validate --json`
+//     (subprocess; warn-skipped if fh-builder is not installed)
+func runValidate(args []string) {
+	fs := flag.NewFlagSet("validate", flag.ExitOnError)
+	skipWorkflowCheck := fs.Bool("skip-workflow-check", false, "skip fh-builder contract-schema validation")
+	_ = fs.Bool("json", true, "emit JSON diagnostics")
+	pos := parseMixed(fs, args)
+	if len(pos) < 1 {
+		die(exitUsage, "usage: fh-agent validate <build-dir>")
+	}
+	dir := pos[0]
+
+	wf, diags := loadWorkflow(filepath.Join(dir, "agent.workflow.json"))
+	mapping, mdiags := loadMapping(filepath.Join(dir, "site.mapping.json"))
+	resources, rdiags := loadResources(filepath.Join(dir, "site.resources.yaml"))
+	manifest, manDiags := loadManifest(filepath.Join(dir, "device.manifest.json"))
+	meta, metaDiags := loadMetadata(filepath.Join(dir, "bundle.meta.json"))
+	diags = append(diags, mdiags...)
+	diags = append(diags, rdiags...)
+	diags = append(diags, manDiags...)
+	diags = append(diags, metaDiags...)
+
+	if hasError(diags) {
+		emitDiags(os.Stderr, diags)
+		os.Exit(exitDiagnostics)
+	}
+
+	// 1. Every channel id has a mapping entry.
+	channelTypes := map[string]string{}
+	for _, ch := range wf.Channels {
+		id, _ := ch["id"].(string)
+		typ, _ := ch["type"].(string)
+		if id == "" {
+			continue
+		}
+		channelTypes[id] = typ
+		if _, ok := mapping[id]; !ok {
+			diags = append(diags, Diagnostic{
+				Severity: "error", Category: "validate",
+				Message:  fmt.Sprintf("workflow channel %q has no mapping entry", id),
+				Location: "site.mapping.json",
+			})
+		}
+	}
+
+	// 2. Every mapping ref resolves.
+	for chID, b := range mapping {
+		typ := channelTypes[chID]
+		switch typ {
+		case "MQTT":
+			if _, ok := resources[b.Ref]; !ok {
+				diags = append(diags, Diagnostic{
+					Severity: "error", Category: "validate",
+					Message:  fmt.Sprintf("mapping for %q points at resource %q not present in site.resources.yaml", chID, b.Ref),
+					Location: "site.resources.yaml",
+				})
+			}
+		case "GPIOIN", "GPIOOUT":
+			if _, ok := manifest.GPIOs[b.Ref]; !ok {
+				diags = append(diags, Diagnostic{
+					Severity: "error", Category: "validate",
+					Message:  fmt.Sprintf("mapping for %q points at gpio %q not present in device.manifest.json", chID, b.Ref),
+					Location: "device.manifest.json",
+				})
+			}
+		case "UART":
+			if _, ok := manifest.Serials[b.Ref]; !ok {
+				diags = append(diags, Diagnostic{
+					Severity: "error", Category: "validate",
+					Message:  fmt.Sprintf("mapping for %q points at serial %q not present in device.manifest.json", chID, b.Ref),
+					Location: "device.manifest.json",
+				})
+			}
+		}
+	}
+
+	// 3. Chosen model fits target.
+	target, err := getTarget(meta.TargetID)
+	if err != nil {
+		diags = append(diags, Diagnostic{Severity: "error", Category: "validate", Message: err.Error()})
+	} else {
+		if meta.ChosenModel.RAMMB > target.RAM.availableMB() {
+			diags = append(diags, Diagnostic{
+				Severity: "error", Category: "validate",
+				Message: fmt.Sprintf("chosen model %q needs %d MB RAM, target %q has only %d MB available",
+					meta.ChosenModel.ID, meta.ChosenModel.RAMMB, target.ID, target.RAM.availableMB()),
+			})
+		}
+		if !modelOnTarget(target, meta.ChosenModel.ID) {
+			diags = append(diags, Diagnostic{
+				Severity: "warn", Category: "validate",
+				Message: fmt.Sprintf("chosen model %q is not in target %q's catalog — may not be available locally",
+					meta.ChosenModel.ID, target.ID),
+			})
+		}
+	}
+
+	// 4. Bundle metadata schema.
+	if meta.SchemaVersion != 1 {
+		diags = append(diags, Diagnostic{
+			Severity: "error", Category: "validate",
+			Message: fmt.Sprintf("bundle.meta.json schemaVersion %d; expected 1", meta.SchemaVersion),
+		})
+	}
+
+	// 5. Contract-schema validation via fh-builder. Subprocess; warn-skipped
+	//    if fh-builder is not installed so the tool stays usable offline.
+	if !*skipWorkflowCheck {
+		diags = append(diags, runWorkflowSchemaCheck(filepath.Join(dir, "agent.workflow.json"))...)
+	}
+
+	emitDiags(os.Stderr, diags)
+	if hasError(diags) {
+		os.Exit(exitDiagnostics)
+	}
+}
+
+// runWorkflowSchemaCheck shells out to `fh-builder validate <wf> --json`
+// (the TS-side contract validator). Returns:
+//   - the validator's diagnostics on success
+//   - one warn-diagnostic if fh-builder is not in PATH (so the tool keeps
+//     working in environments without Node)
+//   - an error-diagnostic if subprocess failed for an unexpected reason
+func runWorkflowSchemaCheck(workflowPath string) []Diagnostic {
+	bin, err := exec.LookPath("fh-builder")
+	if err != nil {
+		return []Diagnostic{{
+			Severity: "warn", Category: "validate",
+			Message:  "fh-builder not in PATH — skipping contract-schema validation; install via `npm i -g @foresthubai/app` or pass --skip-workflow-check",
+			Location: workflowPath,
+		}}
+	}
+	cmd := exec.Command(bin, "validate", workflowPath, "--json")
+	stdout, err := cmd.Output()
+	if err != nil {
+		// Exit 1 means the validator found errors; output is still valid JSON.
+		if ee, ok := err.(*exec.ExitError); ok && ee.ExitCode() == 1 {
+			return parseSchemaDiags(stdout, workflowPath)
+		}
+		return []Diagnostic{{
+			Severity: "error", Category: "validate",
+			Message: fmt.Sprintf("fh-builder validate failed unexpectedly: %v", err),
+		}}
+	}
+	return parseSchemaDiags(stdout, workflowPath)
+}
+
+func parseSchemaDiags(stdout []byte, workflowPath string) []Diagnostic {
+	if len(stdout) == 0 {
+		return nil
+	}
+	var raw []map[string]any
+	if err := json.Unmarshal(stdout, &raw); err != nil {
+		return []Diagnostic{{
+			Severity: "error", Category: "validate",
+			Message: fmt.Sprintf("fh-builder JSON parse error: %v", err),
+		}}
+	}
+	out := make([]Diagnostic, 0, len(raw))
+	for _, r := range raw {
+		d := Diagnostic{
+			Severity: strOf(r["severity"]),
+			Category: strOf(r["category"]),
+			Message:  strOf(r["message"]),
+			Location: workflowPath + "#" + strOf(r["location"]),
+			NodeID:   strOf(r["nodeId"]),
+		}
+		out = append(out, d)
+	}
+	return out
+}
+
+func strOf(v any) string {
+	if s, ok := v.(string); ok {
+		return s
+	}
+	return ""
+}
+
+func modelOnTarget(t *Target, id string) bool {
+	for _, m := range t.SLMs {
+		if m.ID == id {
+			return true
+		}
+	}
+	return false
+}
+
+// ----- minimal loaders for the build/ artifacts -----
+
+func loadWorkflow(path string) (Workflow, []Diagnostic) {
+	raw, err := os.ReadFile(path)
+	if err != nil {
+		return Workflow{}, []Diagnostic{{Severity: "error", Category: "validate", Message: "read agent.workflow.json: " + err.Error()}}
+	}
+	var wf Workflow
+	if err := json.Unmarshal(raw, &wf); err != nil {
+		return Workflow{}, []Diagnostic{{Severity: "error", Category: "validate", Message: "parse agent.workflow.json: " + err.Error()}}
+	}
+	return wf, nil
+}
+
+func loadMapping(path string) (DeploymentMapping, []Diagnostic) {
+	raw, err := os.ReadFile(path)
+	if err != nil {
+		return nil, []Diagnostic{{Severity: "error", Category: "validate", Message: "read site.mapping.json: " + err.Error()}}
+	}
+	out := DeploymentMapping{}
+	if err := json.Unmarshal(raw, &out); err != nil {
+		return nil, []Diagnostic{{Severity: "error", Category: "validate", Message: "parse site.mapping.json: " + err.Error()}}
+	}
+	return out, nil
+}
+
+func loadResources(path string) (ExternalResources, []Diagnostic) {
+	raw, err := os.ReadFile(path)
+	if err != nil {
+		return nil, []Diagnostic{{Severity: "error", Category: "validate", Message: "read site.resources.yaml: " + err.Error()}}
+	}
+	out := ExternalResources{}
+	if err := yaml.Unmarshal(raw, &out); err != nil {
+		return nil, []Diagnostic{{Severity: "error", Category: "validate", Message: "parse site.resources.yaml: " + err.Error()}}
+	}
+	return out, nil
+}
+
+func loadManifest(path string) (DeviceManifest, []Diagnostic) {
+	raw, err := os.ReadFile(path)
+	if err != nil {
+		return DeviceManifest{}, []Diagnostic{{Severity: "error", Category: "validate", Message: "read device.manifest.json: " + err.Error()}}
+	}
+	var out DeviceManifest
+	if err := json.Unmarshal(raw, &out); err != nil {
+		return DeviceManifest{}, []Diagnostic{{Severity: "error", Category: "validate", Message: "parse device.manifest.json: " + err.Error()}}
+	}
+	return out, nil
+}
+
+func loadMetadata(path string) (BundleMetadata, []Diagnostic) {
+	raw, err := os.ReadFile(path)
+	if err != nil {
+		return BundleMetadata{}, []Diagnostic{{Severity: "error", Category: "validate", Message: "read bundle.meta.json: " + err.Error()}}
+	}
+	var out BundleMetadata
+	if err := json.Unmarshal(raw, &out); err != nil {
+		return BundleMetadata{}, []Diagnostic{{Severity: "error", Category: "validate", Message: "parse bundle.meta.json: " + err.Error()}}
+	}
+	return out, nil
+}
diff --git a/go/engine/backend/internal/httpclient/httpclient.go b/go/engine/backend/internal/httpclient/httpclient.go
index 37081ea..4a48fff 100644
--- a/go/engine/backend/internal/httpclient/httpclient.go
+++ b/go/engine/backend/internal/httpclient/httpclient.go
@@ -13,8 +13,19 @@ import (
 	"net/http"
 	"net/url"
 	"strings"
+	"time"
 )
 
+// defaultTimeout is the per-request ceiling for the underlying http.Client.
+// Callers are expected to pass their own context.WithTimeout for tighter
+// per-call deadlines (e.g. BootCallbackTimeout=10s, HeartbeatTimeout=5s),
+// but this default protects call sites that forget — most notably the deploy
+// path (engine.Engine.Deploy → memory.Restore → Snapshot), which inherits an
+// uncapped context and would otherwise hang the engine on an unreachable
+// backend. 30s is loose enough not to interfere with the tighter per-call
+// timeouts and long enough for a slow first-byte on a healthy backend.
+const defaultTimeout = 30 * time.Second
+
 // Client is a JSON-over-HTTP client that attaches a fixed auth header to
 // every request.
 type Client struct {
@@ -31,7 +42,7 @@ func NewClient(baseURL, authHeader, authValue string) *Client {
 		baseURL:    strings.TrimRight(baseURL, "/"),
 		authHeader: authHeader,
 		authValue:  authValue,
-		http:       &http.Client{},
+		http:       &http.Client{Timeout: defaultTimeout},
 	}
 }
 
diff --git a/go/llmproxy/config/config.go b/go/llmproxy/config/config.go
index 5a75696..1ac713e 100644
--- a/go/llmproxy/config/config.go
+++ b/go/llmproxy/config/config.go
@@ -33,17 +33,6 @@ type EmbeddingConfig struct {
 	ExtractTimeout time.Duration `env:"EMBEDDING_EXTRACT_TIMEOUT" envDefault:"5m"`
 }
 
-// ResilienceConfig holds the resilience configuration parameters
-// type ResilienceConfig struct {
-// 	MaxRetries     int           `json:"RESILIENCE_MAX_RETRIES" default:"3"`
-// 	InitialDelay   time.Duration `json:"RESILIENCE_INITIAL_DELAY" default:"1s"`
-// 	MaxDelay       time.Duration `json:"RESILIENCE_MAX_DELAY" default:"30s"`
-// 	Multiplier     float64       `json:"RESILIENCE_MULTIPLIER" default:"2.0"`
-// 	Jitter         bool          `json:"RESILIENCE_JITTER" default:"true"`
-// 	RequestTimeout time.Duration `json:"RESILIENCE_REQUEST_TIMEOUT" default:"30s"`
-// 	ConnectTimeout time.Duration `json:"RESILIENCE_CONNECT_TIMEOUT" default:"10s"`
-// }
-
 // NewConfig creates a new configuration instance of the specified type
 // T is a generic type that allows creating configurations for different structs
 func NewConfig[T any]() *T {
diff --git a/go/llmproxy/resilience.go b/go/llmproxy/resilience.go
deleted file mode 100644
index 2197c05..0000000
--- a/go/llmproxy/resilience.go
+++ /dev/null
@@ -1,23 +0,0 @@
-package llmproxy
-
-// RetryWithResilienceContext retries the given operation according to the provided resilience configuration.
-// func RetryWithResilienceContext(ctx context.Context, cfg config.ResilienceConfig, operation func(ctx context.Context) error) error {
-// 	var err error
-// 	delay := cfg.InitialDelay
-
-// 	for i := 0; i < cfg.MaxRetries; i++ {
-// 		err = operation(ctx)
-// 		if err == nil {
-// 			return nil
-// 		}
-
-// 		if cfg.Jitter {
-// 			delay = time.Duration(float64(delay) * (1 + rand.Float64()*0.5))
-// 		}
-
-// 		time.Sleep(delay)
-// 		delay = min(time.Duration(float64(delay)*cfg.Multiplier), cfg.MaxDelay)
-// 	}
-
-// 	return err
-// }
diff --git a/ts/app/cli/fh-builder.mjs b/ts/app/cli/fh-builder.mjs
old mode 100644
new mode 100755
diff --git a/ts/app/cli/index.ts b/ts/app/cli/index.ts
index fbb5022..65c6a4b 100644
--- a/ts/app/cli/index.ts
+++ b/ts/app/cli/index.ts
@@ -3,23 +3,27 @@ import { updateCommand } from "./update";
 import { validateCommand } from "./validate";
 
 const USAGE = `Usage:
-  fh-builder open [file.json]          Open the workflow builder; optionally pre-load a workflow.
-  fh-builder validate <file.json>      Validate a workflow JSON file. Exits non-zero on errors.
-  fh-builder update <file.json> [out]  Migrate a workflow to the current schema version.
+  fh-builder open [file.json]                  Open the workflow builder; optionally pre-load a workflow.
+  fh-builder validate <file.json> [--json]     Validate a workflow JSON file. --json emits a machine-readable diagnostics array. Exits non-zero on errors.
+  fh-builder update <file.json> [out]          Migrate a workflow to the current schema version.
 `;
 
 const [, , command, ...args] = process.argv;
 
+// Strip recognised flags so positional args keep their indexes.
+const jsonFlag = args.includes("--json");
+const positional = args.filter((a) => a !== "--json");
+
 try {
   switch (command) {
     case "open":
-      await openCommand(args[0]);
+      await openCommand(positional[0]);
       break;
     case "validate":
-      await validateCommand(args[0]);
+      await validateCommand(positional[0], jsonFlag);
       break;
     case "update":
-      await updateCommand(args[0], args[1]);
+      await updateCommand(positional[0], positional[1]);
       break;
     case undefined:
     case "--help":
diff --git a/ts/app/cli/validate.ts b/ts/app/cli/validate.ts
index f4e4232..cba77fe 100644
--- a/ts/app/cli/validate.ts
+++ b/ts/app/cli/validate.ts
@@ -5,15 +5,23 @@ import type { ValidationResult, Diagnostic } from "@foresthubai/workflow-core/di
 import type { ApiWorkflow } from "@foresthubai/workflow-core/workflow";
 
 /**
- * `fh-builder validate <file.json>`
+ * `fh-builder validate <file.json> [--json]`
  *
  * Reads a workflow snapshot, deserializes it to the in-memory shape, runs
  * the headless validator, and prints a report. Exits with code 1 if any
  * errors were found, 0 otherwise.
+ *
+ * `--json` emits a flat diagnostics array on stdout for machine consumption
+ * (used by `fh-agent validate` to merge contract-schema findings into its
+ * own report).
  */
-export async function validateCommand(filePath?: string): Promise<void> {
+export async function validateCommand(filePath?: string, jsonOutput = false): Promise<void> {
   if (!filePath) {
-    process.stderr.write("Usage: fh-builder validate <file.json>\n");
+    if (jsonOutput) {
+      process.stdout.write(JSON.stringify([{ severity: "error", category: "usage", message: "missing <file.json>" }]));
+    } else {
+      process.stderr.write("Usage: fh-builder validate <file.json> [--json]\n");
+    }
     process.exit(1);
   }
 
@@ -24,8 +32,7 @@ export async function validateCommand(filePath?: string): Promise<void> {
   } catch (err: unknown) {
     const code = (err as NodeJS.ErrnoException).code;
     if (code === "ENOENT") {
-      process.stderr.write(`File not found: ${abs}\n`);
-      process.exit(1);
+      emitFatal(jsonOutput, `File not found: ${abs}`);
     }
     throw err;
   }
@@ -34,25 +41,67 @@ export async function validateCommand(filePath?: string): Promise<void> {
   try {
     parsed = JSON.parse(raw);
   } catch (err) {
-    process.stderr.write(`Invalid JSON: ${err instanceof Error ? err.message : String(err)}\n`);
-    process.exit(1);
+    emitFatal(jsonOutput, `Invalid JSON: ${err instanceof Error ? err.message : String(err)}`);
   }
 
   let workflow: ApiWorkflow;
   try {
     workflow = migrate(parsed);
   } catch (err) {
-    process.stderr.write(`${err instanceof Error ? err.message : String(err)}\n`);
-    process.exit(1);
+    emitFatal(jsonOutput, err instanceof Error ? err.message : String(err));
   }
 
-  const result = validateWorkflow(workflow);
+  const result = validateWorkflow(workflow!);
 
-  printReport(abs, result);
+  if (jsonOutput) {
+    process.stdout.write(JSON.stringify(flattenDiagnostics(result), null, 2) + "\n");
+  } else {
+    printReport(abs, result);
+  }
 
   if (result.totalErrors > 0) process.exit(1);
 }
 
+/**
+ * Flattens the nested ValidationResult into a single array of diagnostics —
+ * the shape `fh-agent validate` expects, identical to its own diagnostic
+ * type. Canvas/channel/memory scope is folded into the `location` string.
+ */
+function flattenDiagnostics(result: ValidationResult): Array<Record<string, unknown>> {
+  const out: Array<Record<string, unknown>> = [];
+  for (const canvas of result.canvases) {
+    for (const d of canvas.diagnostics) out.push(toFlat(d, `canvas[${canvas.canvasId}]`));
+  }
+  for (const d of result.channelDiagnostics) out.push(toFlat(d, "channels"));
+  for (const d of result.memoryDiagnostics) out.push(toFlat(d, "memory"));
+  return out;
+}
+
+function toFlat(d: Diagnostic, scope: string): Record<string, unknown> {
+  const where: string[] = [];
+  if (d.nodeId) where.push(`node:${d.nodeId}`);
+  if (d.edgeId) where.push(`edge:${d.edgeId}`);
+  if (d.channelId) where.push(`channel:${d.channelId}`);
+  if (d.paramId) where.push(`param:${d.paramId}`);
+  if (d.outputId) where.push(`output:${d.outputId}`);
+  return {
+    severity: d.severity,
+    category: `workflow:${d.category}`,
+    message: d.message,
+    location: where.length > 0 ? `${scope}/${where.join(",")}` : scope,
+    ...(d.nodeId ? { nodeId: d.nodeId } : {}),
+  };
+}
+
+function emitFatal(jsonOutput: boolean, msg: string): never {
+  if (jsonOutput) {
+    process.stdout.write(JSON.stringify([{ severity: "error", category: "workflow:io", message: msg }]) + "\n");
+  } else {
+    process.stderr.write(msg + "\n");
+  }
+  process.exit(1);
+}
+
 function printReport(file: string, result: ValidationResult): void {
   const out = process.stdout;
 
diff --git a/ts/workflow-builder/LICENSE b/ts/workflow-builder/LICENSE
new file mode 100644
index 0000000..be3f7b2
--- /dev/null
+++ b/ts/workflow-builder/LICENSE
@@ -0,0 +1,661 @@
+                    GNU AFFERO GENERAL PUBLIC LICENSE
+                       Version 3, 19 November 2007
+
+ Copyright (C) 2007 Free Software Foundation, Inc. <https://fsf.org/>
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+                            Preamble
+
+  The GNU Affero General Public License is a free, copyleft license for
+software and other kinds of works, specifically designed to ensure
+cooperation with the community in the case of network server software.
+
+  The licenses for most software and other practical works are designed
+to take away your freedom to share and change the works.  By contrast,
+our General Public Licenses are intended to guarantee your freedom to
+share and change all versions of a program--to make sure it remains free
+software for all its users.
+
+  When we speak of free software, we are referring to freedom, not
+price.  Our General Public Licenses are designed to make sure that you
+have the freedom to distribute copies of free software (and charge for
+them if you wish), that you receive source code or can get it if you
+want it, that you can change the software or use pieces of it in new
+free programs, and that you know you can do these things.
+
+  Developers that use our General Public Licenses protect your rights
+with two steps: (1) assert copyright on the software, and (2) offer
+you this License which gives you legal permission to copy, distribute
+and/or modify the software.
+
+  A secondary benefit of defending all users' freedom is that
+improvements made in alternate versions of the program, if they
+receive widespread use, become available for other developers to
+incorporate.  Many developers of free software are heartened and
+encouraged by the resulting cooperation.  However, in the case of
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+                     END OF TERMS AND CONDITIONS
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+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU Affero General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU Affero General Public License for more details.
+
+    You should have received a copy of the GNU Affero General Public License
+    along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+Also add information on how to contact you by electronic and paper mail.
+
+  If your software can interact with users remotely through a computer
+network, you should also make sure that it provides a way for users to
+get its source.  For example, if your program is a web application, its
+interface could display a "Source" link that leads users to an archive
+of the code.  There are many ways you could offer source, and different
+solutions will be better for different programs; see section 13 for the
+specific requirements.
+
+  You should also get your employer (if you work as a programmer) or school,
+if any, to sign a "copyright disclaimer" for the program, if necessary.
+For more information on this, and how to apply and follow the GNU AGPL, see
+<https://www.gnu.org/licenses/>.
diff --git a/ts/workflow-builder/NOTICE b/ts/workflow-builder/NOTICE
new file mode 100644
index 0000000..7f8f840
--- /dev/null
+++ b/ts/workflow-builder/NOTICE
@@ -0,0 +1,16 @@
+edge-agents/workflow-builder
+Copyright (c) 2026 ForestHub. All rights reserved.
+
+This product includes software developed by ForestHub
+(https://foresthub.ai).
+
+The @foresthubai/workflow-builder package is the React canvas/editor
+component library for the edge-agents platform. This package is
+licensed under the GNU Affero General Public License Version 3.0
+(AGPL-3.0-only) or a separate commercial license.
+
+It depends on @foresthubai/workflow-core which is licensed under the
+Apache License, Version 2.0. AGPL allows consumption of Apache-licensed
+dependencies; the AGPL terms apply to this package only.
+
+For commercial licensing inquiries: root@foresthub.ai
diff --git a/ts/workflow-builder/package.json b/ts/workflow-builder/package.json
index 2202270..4eff90e 100644
--- a/ts/workflow-builder/package.json
+++ b/ts/workflow-builder/package.json
@@ -2,6 +2,7 @@
   "name": "@foresthubai/workflow-builder",
   "version": "0.1.1",
   "description": "Reusable React component library: the workflow canvas/editor. Imports workflow-core for types and validation.",
+  "license": "AGPL-3.0-only",
   "repository": {
     "type": "git",
     "url": "git+https://github.com/ForestHubAI/edge-agents.git",
@@ -20,11 +21,15 @@
   },
   "files": [
     "dist",
-    "src",
-    "tailwind-preset.ts"
+    "tailwind-preset.ts",
+    "src/styles",
+    "README.md",
+    "LICENSE",
+    "NOTICE"
   ],
   "publishConfig": {
-    "registry": "https://npm.pkg.github.com"
+    "registry": "https://registry.npmjs.org",
+    "access": "public"
   },
   "scripts": {
     "build": "tsc -b",
diff --git a/ts/workflow-core/LICENSE b/ts/workflow-core/LICENSE
new file mode 100644
index 0000000..d645695
--- /dev/null
+++ b/ts/workflow-core/LICENSE
@@ -0,0 +1,202 @@
+
+                                 Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
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+      form, that is based on (or derived from) the Work and for which the
+      editorial revisions, annotations, elaborations, or other modifications
+      represent, as a whole, an original work of authorship. For the purposes
+      of this License, Derivative Works shall not include works that remain
+      separable from, or merely link (or bind by name) to the interfaces of,
+      the Work and Derivative Works thereof.
+
+      "Contribution" shall mean any work of authorship, including
+      the original version of the Work and any modifications or additions
+      to that Work or Derivative Works thereof, that is intentionally
+      submitted to Licensor for inclusion in the Work by the copyright owner
+      or by an individual or Legal Entity authorized to submit on behalf of
+      the copyright owner. For the purposes of this definition, "submitted"
+      means any form of electronic, verbal, or written communication sent
+      to the Licensor or its representatives, including but not limited to
+      communication on electronic mailing lists, source code control systems,
+      and issue tracking systems that are managed by, or on behalf of, the
+      Licensor for the purpose of discussing and improving the Work, but
+      excluding communication that is conspicuously marked or otherwise
+      designated in writing by the copyright owner as "Not a Contribution."
+
+      "Contributor" shall mean Licensor and any individual or Legal Entity
+      on behalf of whom a Contribution has been received by Licensor and
+      subsequently incorporated within the Work.
+
+   2. Grant of Copyright License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      copyright license to reproduce, prepare Derivative Works of,
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+      Work and such Derivative Works in Source or Object form.
+
+   3. Grant of Patent License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      (except as stated in this section) patent license to make, have made,
+      use, offer to sell, sell, import, and otherwise transfer the Work,
+      where such license applies only to those patent claims licensable
+      by such Contributor that are necessarily infringed by their
+      Contribution(s) alone or by combination of their Contribution(s)
+      with the Work to which such Contribution(s) was submitted. If You
+      institute patent litigation against any entity (including a
+      cross-claim or counterclaim in a lawsuit) alleging that the Work
+      or a Contribution incorporated within the Work constitutes direct
+      or contributory patent infringement, then any patent licenses
+      granted to You under this License for that Work shall terminate
+      as of the date such litigation is filed.
+
+   4. Redistribution. You may reproduce and distribute copies of the
+      Work or Derivative Works thereof in any medium, with or without
+      modifications, and in Source or Object form, provided that You
+      meet the following conditions:
+
+      (a) You must give any other recipients of the Work or
+          Derivative Works a copy of this License; and
+
+      (b) You must cause any modified files to carry prominent notices
+          stating that You changed the files; and
+
+      (c) You must retain, in the Source form of any Derivative Works
+          that You distribute, all copyright, patent, trademark, and
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+          excluding those notices that do not pertain to any part of
+          the Derivative Works; and
+
+      (d) If the Work includes a "NOTICE" text file as part of its
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+          include a readable copy of the attribution notices contained
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+          pertain to any part of the Derivative Works, in at least one
+          of the following places: within a NOTICE text file distributed
+          as part of the Derivative Works; within the Source form or
+          documentation, if provided along with the Derivative Works; or,
+          within a display generated by the Derivative Works, if and
+          wherever such third-party notices normally appear. The contents
+          of the NOTICE file are for informational purposes only and
+          do not modify the License. You may add Your own attribution
+          notices within Derivative Works that You distribute, alongside
+          or as an addendum to the NOTICE text from the Work, provided
+          that such additional attribution notices cannot be construed
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+
+      You may add Your own copyright statement to Your modifications and
+      may provide additional or different license terms and conditions
+      for use, reproduction, or distribution of Your modifications, or
+      for any such Derivative Works as a whole, provided Your use,
+      reproduction, and distribution of the Work otherwise complies with
+      the conditions stated in this License.
+
+   5. Submission of Contributions. Unless You explicitly state otherwise,
+      any Contribution intentionally submitted for inclusion in the Work
+      by You to the Licensor shall be under the terms and conditions of
+      this License, without any additional terms or conditions.
+      Notwithstanding the above, nothing herein shall supersede or modify
+      the terms of any separate license agreement you may have executed
+      with Licensor regarding such Contributions.
+
+   6. Trademarks. This License does not grant permission to use the trade
+      names, trademarks, service marks, or product names of the Licensor,
+      except as required for reasonable and customary use in describing the
+      origin of the Work and reproducing the content of the NOTICE file.
+
+   7. Disclaimer of Warranty. Unless required by applicable law or
+      agreed to in writing, Licensor provides the Work (and each
+      Contributor provides its Contributions) on an "AS IS" BASIS,
+      WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
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+      PARTICULAR PURPOSE. You are solely responsible for determining the
+      appropriateness of using or redistributing the Work and assume any
+      risks associated with Your exercise of permissions under this License.
+
+   8. Limitation of Liability. In no event and under no legal theory,
+      whether in tort (including negligence), contract, or otherwise,
+      unless required by applicable law (such as deliberate and grossly
+      negligent acts) or agreed to in writing, shall any Contributor be
+      liable to You for damages, including any direct, indirect, special,
+      incidental, or consequential damages of any character arising as a
+      result of this License or out of the use or inability to use the
+      Work (including but not limited to damages for loss of goodwill,
+      work stoppage, computer failure or malfunction, or any and all
+      other commercial damages or losses), even if such Contributor
+      has been advised of the possibility of such damages.
+
+   9. Accepting Warranty or Additional Liability. While redistributing
+      the Work or Derivative Works thereof, You may choose to offer,
+      and charge a fee for, acceptance of support, warranty, indemnity,
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+      on Your own behalf and on Your sole responsibility, not on behalf
+      of any other Contributor, and only if You agree to indemnify,
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+
+      To apply the Apache License to your work, attach the following
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+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
diff --git a/ts/workflow-core/NOTICE b/ts/workflow-core/NOTICE
new file mode 100644
index 0000000..b8d6b09
--- /dev/null
+++ b/ts/workflow-core/NOTICE
@@ -0,0 +1,14 @@
+edge-agents/workflow-core
+Copyright (c) 2026 ForestHub
+
+This product includes software developed by
+ForestHub (https://foresthub.ai).
+
+The @foresthubai/workflow-core package is the headless workflow model and
+validation library of the edge-agents platform. This package is licensed
+under the Apache License, Version 2.0, while the rest of the repository
+(the engine and the React workflow builder) is licensed under AGPL-3.0
+or a separate commercial license.
+
+See the repository LICENSE for AGPL terms and ts/workflow-core/LICENSE for
+the Apache terms applicable to this package.
diff --git a/ts/workflow-core/README.md b/ts/workflow-core/README.md
new file mode 100644
index 0000000..eb31dfe
--- /dev/null
+++ b/ts/workflow-core/README.md
@@ -0,0 +1,63 @@
+# @foresthubai/workflow-core
+
+Headless workflow model, serialization, and pure validation for the ForestHub
+[edge-agents](https://github.com/ForestHubAI/edge-agents) platform. No React,
+no DOM, no browser dependencies — this package is the language-neutral
+TypeScript binding for the workflow graph format defined in
+[`contract/workflow.yaml`](https://github.com/ForestHubAI/edge-agents/tree/main/contract).
+
+The Go engine and the React-based workflow builder both consume this contract.
+This package gives TypeScript callers the same three-layer model — generated
+API types (the wire format), a hand-written domain model, and a pure
+`validateWorkflowState` validator — without pulling in any UI or runtime
+machinery.
+
+## Install
+
+```sh
+npm install @foresthubai/workflow-core
+```
+
+## Quickstart
+
+```ts
+import { deserialize, validateWorkflowState } from "@foresthubai/workflow-core";
+
+// `apiWorkflow` is the wire-format JSON produced by the engine or the builder.
+const workflow = deserialize(apiWorkflow);
+const result = validateWorkflowState(workflow);
+
+if (!result.ok) {
+  for (const diagnostic of result.diagnostics) {
+    console.error(diagnostic.message);
+  }
+}
+```
+
+Subpath exports (`/api`, `/node`, `/edge`, `/channel`, `/memory`, `/model`,
+`/deploy`, `/parameter`, `/function`, `/variable`, `/expression`, `/workflow`,
+`/diagnostics`, `/migration`, `/id`) expose the individual domain modules; the
+root barrel re-exports the most common types and the validator.
+
+## Architecture
+
+The repository [`ts/CLAUDE.md`](https://github.com/ForestHubAI/edge-agents/blob/main/ts/CLAUDE.md)
+and [`workflow-core/docs/`](https://github.com/ForestHubAI/edge-agents/tree/main/ts/workflow-core/docs)
+have the canonical write-ups on the API/domain/store layering, the parameter
+contract, and the `Api`-prefix naming convention. The short version:
+
+- **API layer** (`src/api/`) — generated from `contract/workflow.yaml`. Never
+  hand-edit; regenerate with `npm run generate`.
+- **Domain layer** (`src/{node,edge,channel,memory,model,function,workflow,
+  parameter,variable,expression}/`) — hand-written in-memory shape for
+  validation and import/export.
+- **Validation** — `validateWorkflowState` runs on the domain `Workflow`.
+
+## License
+
+Apache License 2.0 — see [`LICENSE`](./LICENSE) and [`NOTICE`](./NOTICE).
+
+The rest of the `edge-agents` repository (the engine and the React workflow
+builder) is licensed under AGPL-3.0 or a separate commercial license. This
+package is intentionally Apache-2.0 so it can be embedded freely in
+downstream tooling and bindings.
diff --git a/ts/workflow-core/package.json b/ts/workflow-core/package.json
index f62ac76..b21f11b 100644
--- a/ts/workflow-core/package.json
+++ b/ts/workflow-core/package.json
@@ -2,6 +2,7 @@
   "name": "@foresthubai/workflow-core",
   "version": "0.1.1",
   "description": "Headless workflow types + serialization + pure validator. No React, no browser.",
+  "license": "Apache-2.0",
   "repository": {
     "type": "git",
     "url": "git+https://github.com/ForestHubAI/edge-agents.git",
@@ -78,10 +79,13 @@
   },
   "files": [
     "dist",
-    "src"
+    "README.md",
+    "LICENSE",
+    "NOTICE"
   ],
   "publishConfig": {
-    "registry": "https://npm.pkg.github.com"
+    "registry": "https://registry.npmjs.org",
+    "access": "public"
   },
   "scripts": {
     "generate": "openapi-typescript ../../contract/workflow.yaml -o src/api/workflow.ts",