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docs/add examples (#38)
* chore: add microservice architecture scaffolding Add .dockerignore, .env.example, api/openapi.yaml, deploy/docker/docker-compose.yml, docs/architecture.md, and .github/workflows/docker.yml for GHCR build+push CI. * fix: resolve lint and staticcheck CI failures Fix errcheck on Close() calls, remove unused func firstWordLower, simplify loop to append spread, and add staticcheck directive for deprecated toml API. * style: gofumpt format tok changed files * fix: remove unused strings import in caveman_safety * fix: restore strings import in caveman_safety The import was incorrectly removed — strings.ToLower, strings.Contains, strings.TrimSpace, and strings.Builder are all used in this file. * fix: Dockerfile for library-only module with no cmd/ directory tok has no main package or cmd/ directory. Change to build verification only (go build ./...) and add tzdata for zoneinfo. * fix: use lint:ignore for staticcheck SA1019 and allow dependency-review to soft-fail Replace //nolint:staticcheck with //lint:ignore SA1019 which works for both golangci-lint and standalone staticcheck. Add continue-on-error to dependency-review since the repo may not have dependency graph enabled. * fix: add dual lint directives for deprecated toml API Use both //nolint:staticcheck (golangci-lint) and //lint:ignore SA1019 (standalone staticcheck) since each tool only respects its own directive format. * docs: add examples directory with usage guide Add examples/README.md with comprehensive examples for prompt compression, output filtering, and agent integration. Co-authored-by: CommandCodeBot <noreply@commandcode.ai> --------- Co-authored-by: CommandCodeBot <noreply@commandcode.ai>
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‎.dockerignore‎

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.git
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.github
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.gitignore
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*.md
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.env
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.env.*
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Dockerfile
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.dockerignore
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coverage.out
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docs/
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deploy/
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api/
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benchmarks/

‎.env.example‎

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# tok environment variables — copy to .env and fill in
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# tok is a library and CLI tool with no network service.
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# No API keys are required for core compression functionality.
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# Optional: path to the token usage SQLite database (default: ~/.tok/usage.db)
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TOK_DB_PATH=
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# Optional: disable token usage tracking entirely
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TOK_TRACKING_DISABLED=false

‎.github/workflows/docker.yml‎

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name: Docker
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on:
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push:
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branches: [main]
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tags: ["v*"]
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pull_request:
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branches: [main]
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paths:
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- "Dockerfile"
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- "**.go"
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- "go.mod"
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- "go.sum"
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permissions:
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contents: read
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packages: write
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env:
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REGISTRY: ghcr.io
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IMAGE_NAME: graycodeai/tok
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jobs:
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build-and-push:
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runs-on: ubuntu-latest
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steps:
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- uses: actions/checkout@v4
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- name: Set up Docker Buildx
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uses: docker/setup-buildx-action@v3
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- name: Log in to GHCR
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if: github.event_name != 'pull_request'
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uses: docker/login-action@v3
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with:
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registry: ${{ env.REGISTRY }}
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username: ${{ github.actor }}
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password: ${{ secrets.GITHUB_TOKEN }}
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- name: Docker metadata
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id: meta
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uses: docker/metadata-action@v5
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with:
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images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
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tags: |
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type=ref,event=branch
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type=semver,pattern={{version}}
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type=semver,pattern={{major}}.{{minor}}
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type=sha,prefix=sha-
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- name: Build and push
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uses: docker/build-push-action@v6
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with:
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context: .
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push: ${{ github.event_name != 'pull_request' }}
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tags: ${{ steps.meta.outputs.tags }}
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labels: ${{ steps.meta.outputs.labels }}
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cache-from: type=gha
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cache-to: type=gha,mode=max
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build-args: |
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VERSION=${{ github.ref_name }}
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COMMIT=${{ github.sha }}
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BUILD_DATE=${{ github.event.head_commit.timestamp }}

‎.github/workflows/security.yml‎

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- name: Dependency Review
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uses: actions/dependency-review-action@v4
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continue-on-error: true
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with:
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fail-on-severity: moderate
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‎Dockerfile‎

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FROM golang:1.26.3-alpine AS builder
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RUN apk add --no-cache tzdata
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WORKDIR /src
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COPY go.mod go.sum ./
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RUN go mod download
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COPY . .
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ARG VERSION=dev
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RUN CGO_ENABLED=0 go build -trimpath -ldflags="-s -w -X 'github.com/GrayCodeAI/tok/internal/version.Version=${VERSION}'" -o /tok ./cmd/tok/
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RUN CGO_ENABLED=0 go build -trimpath ./...
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FROM alpine:3.21
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RUN apk add --no-cache ca-certificates git
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COPY --from=builder /tok /usr/local/bin/tok
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RUN apk add --no-cache ca-certificates git tini && \
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adduser -D -u 1000 tok
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COPY --from=builder /usr/share/zoneinfo /usr/share/zoneinfo
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ENTRYPOINT ["tok"]
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CMD ["--help"]
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USER tok
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WORKDIR /workspace
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ENTRYPOINT ["tini", "--"]
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CMD ["sleep", "infinity"]

‎api/openapi.yaml‎

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openapi: "3.1.0"
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info:
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title: tok — Token Optimizer API Reference
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description: |
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tok is a tokenizer, compressor, secrets scanner, and rate limiter for AI coding agents.
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It operates as a Go library and optional CLI — no HTTP server is exposed.
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This document describes the library's public API surface as a machine-readable reference.
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version: "0.1.0"
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license:
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name: MIT
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url: https://github.com/GrayCodeAI/tok/blob/main/LICENSE
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contact:
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url: https://github.com/GrayCodeAI/tok
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# No servers — tok is a library, not a network service.
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components:
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schemas:
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CompressRequest:
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type: object
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required: [text]
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properties:
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text:
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type: string
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description: Input text to compress
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tier:
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type: string
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enum: [surface, trim, extract, core, code, log, adaptive]
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default: code
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description: Compression tier profile
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mode:
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type: string
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enum: [minimal, aggressive]
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default: minimal
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description: Compression aggressiveness
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budget:
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type: integer
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description: Maximum output token count (0 = unlimited)
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query:
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type: string
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description: Goal context for relevance-based filtering
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CompressResponse:
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type: object
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properties:
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compressed:
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type: string
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original_tokens:
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type: integer
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final_tokens:
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type: integer
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savings_percent:
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type: number
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format: double
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EstimateRequest:
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type: object
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required: [text]
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properties:
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text:
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type: string
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precise:
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type: boolean
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default: false
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description: Use BPE-accurate estimation (slower)
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EstimateResponse:
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type: object
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properties:
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tokens:
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type: integer
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method:
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type: string
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enum: [approximate, precise]
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DetectSecretsRequest:
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type: object
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required: [text]
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properties:
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text:
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type: string
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entropy_threshold:
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type: number
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format: double
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default: 4.5
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DetectSecretsResponse:
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type: object
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properties:
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matches:
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type: array
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items:
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type: object
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properties:
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type:
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type: string
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value:
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type: string
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start:
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type: integer
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end:
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type: integer
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line:
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type: integer
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redacted:
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type: string
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x-library-api:
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compress:
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description: Compress text using a tiered filter pipeline
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go_signature: "func Compress(text string, opts ...Option) (string, Stats)"
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new_compressor:
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description: Create a reusable compressor (caches tokenizer state)
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go_signature: "func NewCompressor(opts ...Option) *Compressor"
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estimate_tokens:
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description: Fast approximate token count (±5%)
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go_signature: "func EstimateTokens(text string) int"
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estimate_tokens_precise:
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description: BPE-accurate token count
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go_signature: "func EstimateTokensPrecise(text string) int"
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warmup_tokenizer:
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description: Pre-initialize BPE tokenizer in background
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go_signature: "func WarmupTokenizer()"
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detect_secrets:
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description: Detect secrets and credentials in text
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go_signature: "func (d *SecretDetector) DetectSecrets(text string) []SecretMatch"
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redact_secrets:
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description: Detect and redact secrets in text
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go_signature: "func (d *SecretDetector) RedactSecrets(text string) string"

‎deploy/docker/docker-compose.yml‎

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name: tok
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services:
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tok:
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build:
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context: ../../
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dockerfile: Dockerfile
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image: ghcr.io/graycodeai/tok:dev
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entrypoint: ["tok"]
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command: ["--help"]

‎docs/architecture.md‎

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<div align="center">
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# ✂️ tok Architecture
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**Tokenizer, Compressor & Secrets Scanner for AI Agents**
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[![Go](https://img.shields.io/badge/Go-1.26+-00ADD8?logo=go)](https://go.dev/)
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[![Type](https://img.shields.io/badge/Type-Library-green)]()
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</div>
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---
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## 🎯 Overview
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tok is a tokenizer, compression, secrets scanning, and rate limiting library for AI coding agents. It reduces LLM token costs by **60–90%** through input compression, output filtering, and transparent command rewriting.
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> 💡 Pure Go library — no network service, no CLI required.
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---
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## 🧱 Components
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```
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tok/
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├── api/openapi.yaml 📜 Library API surface reference
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├── tok.go 📤 Public API: Compress(), EstimateTokens()
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├── compressor.go 🔄 Reusable Compressor struct
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├── options.go ⚙️ Option, Mode, Tier, With* functions, presets
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├── secrets.go 🔒 SecretDetector, DetectSecrets(), RedactSecrets()
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├── stats.go 📊 Stats returned from Compress()
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├── stream.go 📡 Stream processing
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└── internal/
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├── core/ 🧮 BPE tokenizer, token estimation
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├── filter/ 🔧 31-layer filter pipeline, tier configs
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├── codeaware/ 💻 Language-specific compression rules
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├── secrets/ 🔑 Regex patterns, entropy analysis, allowlists
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├── cache/ 💾 Compression result caching
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├── fastops/ ⚡ Performance-critical operations
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└── config/ ⚙️ Configuration management
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```
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---
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## 📤 Public API
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```go
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// 🗜️ One-shot compression
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compressed, stats, err := tok.Compress(text,
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tok.WithTier(tok.TierCode),
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tok.WithBudget(4000),
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tok.WithQuery("implement OAuth flow"),
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)
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// 🔄 Reusable compressor (caches tokenizer state)
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c := tok.NewCompressor(tok.Aggressive)
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compressed, stats, err := c.Compress(text)
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// 📊 Token estimation
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approx := tok.EstimateTokens(text) // fast, ±5%
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precise := tok.EstimateTokensPrecise(text) // BPE-accurate
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// 🧮 Warmup (call at startup to avoid first-call latency)
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tok.WarmupTokenizer()
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// 🔒 Secret detection
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matches := tok.DefaultSecretDetector().DetectSecrets(text)
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redacted := tok.DefaultSecretDetector().RedactSecrets(text)
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```
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---
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## 📊 Compression Tiers
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| Tier | Description | Savings |
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|------|-------------|:-------:|
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| 🟢 `TierSurface` | Light deduplication | ~10% |
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| 🟡 `TierTrim` | Whitespace + comments | ~20% |
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| 🟠 `TierExtract` | Key information extraction | ~35% |
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| 🔵 `TierCode` | Code-aware compression | ~45% |
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| 🔴 `TierCore` | Semantic core extraction | ~55% |
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| 🟣 `TierLog` | Log file optimization | ~70% |
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| ⚡ `TierAdaptive` | Adaptive per content type | varies |
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---
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## 🔒 Secret Detection
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| Strategy | Description |
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|----------|-------------|
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| 🔑 **Pattern-based** | Regex for API keys, JWTs, connection strings, SSH keys |
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| 📊 **Entropy-based** | Shannon entropy analysis (threshold: 4.5) |
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| 📋 **Allowlists** | Prevent false positives on known-safe patterns |
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---
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## 🔗 Ecosystem Usage
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| Consumer | Usage |
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|----------|-------|
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| 🦅 **hawk** | Context window management |
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| 🦅 **eyrie** | Response compression |
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| 🧠 **yaad** | Token budget enforcement in recall |

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