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Add CI pipeline with linting, formatting, and template smoke tests
- ESLint v9 + Prettier for TypeScript/JS across src/ and templates/ - Ruff for Python linting/formatting in templates/langchain/ - GitHub Actions CI with 3 jobs: lint-and-build (Node 18/22), lint-python (Ruff), and smoke-test-templates (scaffold + build) - Generated TS projects now ship with Prettier config - Fix existing lint issues (unused imports, empty catch blocks) - Apply consistent formatting across all source files Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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‎.github/workflows/ci.yml‎

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name: CI
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on:
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push:
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branches: [main]
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pull_request:
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branches: [main]
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jobs:
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lint-and-build:
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name: Lint, Format & Build (Node ${{ matrix.node-version }})
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runs-on: ubuntu-latest
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strategy:
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matrix:
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node-version: [18, 22]
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steps:
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- uses: actions/checkout@v4
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- uses: actions/setup-node@v4
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with:
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node-version: ${{ matrix.node-version }}
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cache: npm
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- run: npm ci
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- run: npm run lint
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- run: npm run format:check
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- run: npm run typecheck
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- run: npm run build
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lint-python:
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name: Lint Python Templates
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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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- uses: astral-sh/ruff-action@v3
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with:
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args: check templates/langchain/
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- uses: astral-sh/ruff-action@v3
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with:
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args: format --check templates/langchain/
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smoke-test-templates:
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name: Smoke Test — ${{ matrix.template }}
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runs-on: ubuntu-latest
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needs: lint-and-build
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strategy:
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matrix:
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template: [ai-sdk, mastra, langchain]
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steps:
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- uses: actions/checkout@v4
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- uses: actions/setup-node@v4
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with:
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node-version: 22
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cache: npm
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- uses: actions/setup-python@v5
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if: matrix.template == 'langchain'
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with:
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python-version: "3.12"
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- run: npm ci
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- run: npm run build
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- name: Scaffold template
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run: node dist/index.js ci-test-${{ matrix.template }} --template ${{ matrix.template }}
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- name: Create .env from example
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working-directory: ci-test-${{ matrix.template }}
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run: cp .env.example .env
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- name: Build (TypeScript templates)
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if: matrix.template != 'langchain'
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working-directory: ci-test-${{ matrix.template }}
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run: npm run build
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- name: Lint (TypeScript templates)
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if: matrix.template != 'langchain'
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working-directory: ci-test-${{ matrix.template }}
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run: npm run lint
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- name: Syntax check (Python template)
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if: matrix.template == 'langchain'
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working-directory: ci-test-${{ matrix.template }}
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run: |
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.venv/bin/python -m py_compile app/main.py
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.venv/bin/python -m py_compile app/config.py

‎.prettierignore‎

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dist/
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node_modules/
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*.lock
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*.hbs
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templates/langchain/**/*.py

‎.prettierrc‎

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{
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"semi": true,
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"singleQuote": false,
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"trailingComma": "es5",
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"printWidth": 100,
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"tabWidth": 2
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}

‎README.md‎

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## Templates
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| Template | Flag value | Tech stack | UI |
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|---|---|---|---|
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| **AI SDK** | `ai-sdk` | Next.js 16 + Vercel AI SDK + `@ai-sdk/mcp` + Drizzle ORM + SQLite | React 19 + Tailwind CSS |
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| **Mastra** | `mastra` | Next.js 16 + Mastra + `@mastra/mcp` + Drizzle ORM + SQLite | React 19 + Tailwind CSS |
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| Template | Flag value | Tech stack | UI |
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| ------------- | ----------- | ----------------------------------------------------------------------- | ----------------------------- |
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| **AI SDK** | `ai-sdk` | Next.js 16 + Vercel AI SDK + `@ai-sdk/mcp` + Drizzle ORM + SQLite | React 19 + Tailwind CSS |
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| **Mastra** | `mastra` | Next.js 16 + Mastra + `@mastra/mcp` + Drizzle ORM + SQLite | React 19 + Tailwind CSS |
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| **LangChain** | `langchain` | FastAPI + LangGraph + `langchain-mcp-adapters` + SQLAlchemy + aiosqlite | Jinja2 templates + vanilla JS |
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All three templates connect to Arcade's MCP Gateway for tool discovery and execution. The TypeScript templates (`ai-sdk` and `mastra`) share a common Next.js frontend. The Python template (`langchain`) uses server-rendered HTML with SSE streaming.
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### Required environment variables
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| Variable | Description | Where to get it |
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|---|---|---|
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| `ARCADE_GATEWAY_URL` | Your Arcade MCP Gateway URL | [app.arcade.dev/mcp-gateways](https://app.arcade.dev/mcp-gateways) |
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| Variable | Description | Where to get it |
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| --------------------------------------- | --------------------------------------- | ------------------------------------------------------------------------------------------------------------ |
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| `ARCADE_GATEWAY_URL` | Your Arcade MCP Gateway URL | [app.arcade.dev/mcp-gateways](https://app.arcade.dev/mcp-gateways) |
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| `OPENAI_API_KEY` or `ANTHROPIC_API_KEY` | LLM provider API key (set at least one) | [platform.openai.com](https://platform.openai.com) or [console.anthropic.com](https://console.anthropic.com) |
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### Optional environment variables
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| Variable | Description |
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|---|---|
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| `ARCADE_CUSTOM_VERIFIER` | Set to `true` to enable per-user token binding (COAT protection) |
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| `ARCADE_API_KEY` | Required when custom verifier is enabled; get from [app.arcade.dev/settings](https://app.arcade.dev/settings) |
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| `DATABASE_URL` | SQLite file path (defaults to `local.db`) |
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| `PORT` | Server port (defaults to `8765` for langchain, `3000` for Next.js templates) |
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| Variable | Description |
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| ------------------------ | ------------------------------------------------------------------------------------------------------------- |
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| `ARCADE_CUSTOM_VERIFIER` | Set to `true` to enable per-user token binding (COAT protection) |
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| `ARCADE_API_KEY` | Required when custom verifier is enabled; get from [app.arcade.dev/settings](https://app.arcade.dev/settings) |
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| `DATABASE_URL` | SQLite file path (defaults to `local.db`) |
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| `PORT` | Server port (defaults to `8765` for langchain, `3000` for Next.js templates) |
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### Arcade Gateway setup
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‎eslint.config.mjs‎

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import js from "@eslint/js";
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import tseslint from "typescript-eslint";
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import eslintConfigPrettier from "eslint-config-prettier";
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export default tseslint.config(
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{
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ignores: [
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"dist/**",
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"node_modules/**",
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"templates/langchain/**",
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"templates/_shared/nextjs-ui/**",
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],
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},
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js.configs.recommended,
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...tseslint.configs.recommended,
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eslintConfigPrettier,
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{
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files: ["src/**/*.ts"],
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languageOptions: {
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parserOptions: {
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projectService: true,
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tsconfigRootDir: import.meta.dirname,
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},
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},
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},
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{
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files: ["templates/**/*.{ts,tsx,js,jsx,mjs}"],
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rules: {
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"@typescript-eslint/no-unused-vars": [
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"warn",
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{ argsIgnorePattern: "^_", varsIgnorePattern: "^_" },
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],
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},
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},
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{
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rules: {
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"no-console": "off",
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"@typescript-eslint/no-unused-vars": [
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"error",
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{ argsIgnorePattern: "^_", varsIgnorePattern: "^_" },
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],
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},
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}
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);

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