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Turborepo monorepo AGENTS.md

AGENTS.md for pnpm + Turborepo 2 monorepos: workspace boundaries, filtered tasks, shared configs, and caching.

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Save this as AGENTS.md in your repository root, commit it, and your agent will pick it up automatically. Edit the commands to match your project.

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# AGENTS.md: pnpm + Turborepo monorepo

## Layout
- `apps/*` are deployable apps; `packages/*` are shared libraries (`@repo/ui`, `@repo/db`, `@repo/config-*`).
- Each app or package may have its own `AGENTS.md` with local rules; the closest one wins.

## Commands
- Everything: `pnpm turbo run build lint test typecheck`
- One package and its deps: `pnpm turbo run test --filter=@repo/web...`
- Only what changed: `pnpm turbo run test --filter=...[origin/main]`
- Add a dependency to one package: `pnpm add zod --filter @repo/api` (never at the root unless it's tooling).

## Rules
- Packages import each other by package name (`@repo/ui`), declared in `package.json` with `"workspace:*"`. No relative imports across package folders.
- Apps never import from other apps. Shared code moves into a package.
- Each package exposes a public API via `exports` in `package.json`; don't deep-import internal files.
- Shared TS, ESLint and Tailwind config come from `packages/config-*`; extend them, don't copy.
- Tasks are defined in `turbo.json` with correct `dependsOn` (`^build`) and `outputs` so caching works. Env vars that affect output go in `env`.
- Keep one version of each external dependency across the repo (use pnpm catalogs if configured).

## Don't
- Don't run `pnpm install` with `--no-frozen-lockfile` in CI, or edit `pnpm-lock.yaml` by hand.

## Done
`pnpm turbo run lint typecheck test build --filter=...[origin/main]` passes.