Monorepo / Backend Layout

For repositories with a backend/ (or similar) directory, that directory is the backend app root.

Checklist Before Creating Any API or Lib File

1. Identify the backend app root (e.g. backend/).
2. Create files only under that root:
   • API routes: backend/src/app/api/...
   • Library code: backend/src/lib/...
   • (Or the project's actual layout—e.g. backend/src/app/... for Next.js App Router.)

Rules

• Never create src/ at the repository root for backend routes or libs.
• Never put routes under backend/lib/ if the project uses backend/src/lib/.
• Confirm the path convention (e.g. backend/src/lib/ not backend/lib/) before creating files.

Why This Matters