n8n MCP Server

# AGENTS.md — Quick Rules for Coding Agents - Build: `npm install`; `npm run build`; watch: `npm run dev`. - Lint: `npm run lint` (type-check only; no ESLint/Prettier). - Test (all): `npm test`; coverage: `npm run test:coverage`; watch: `npm run test:watch`. - Test (single file): `npm test -- src/__tests__/n8n-client.test.ts`. - Test (single case): `npm test -- -t "pattern"` (works with watch too). - Node/TS: Node >= 18; ESM only; strict TS (`tsconfig.json`). - Imports: Always use relative ESM with `.js` extension in TS (e.g., `./types.js`). - Layout: source in `src/`; tests in `src/__tests__/` as `<name>.test.ts`; build to `dist/`. - Formatting: two-space indent; match surrounding style; avoid gratuitous refactors. - Types: avoid `any`; prefer explicit types; use `unknown` then narrow; `Record<string, unknown>` for maps. - Naming: files kebab-case; types/interfaces PascalCase; functions/vars camelCase; constants UPPER_SNAKE if truly constant. - Errors: Return structured JSON via `success()`/`error()` from `src/output.ts`. - Logging: Use `logger` (stderr). Do not `console.log` (MCP stdout must stay clean). - Secrets: Never log secrets; built-in redaction exists; don’t echo env vars. - Debug: `MCP_DEBUG=debug` and/or `MCP_ENABLE_SOURCE_MAPS=1` for richer stacks. - Jest: ESM via `ts-jest`; tests matched by `**/__tests__/**/*.test.ts`; mapper strips `.js` in tests. - CI parity: `npm ci && npm run lint && npm run build && npm test && npm run test:coverage` before PRs. - Copilot: Follow `.github/copilot-instructions.md` — never cancel builds/tests; timeouts: install 60s, build 30s, test 30s, coverage 60s. - Cursor rules: None present now; if added under `.cursor/` or `.cursorrules`, follow them. - Security: Don’t commit secrets; configure `N8N_BASE_URL` + `N8N_API_KEY` or `N8N_USERNAME`/`N8N_PASSWORD`.