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Cursor is our primary editor for navigating the Bun monorepo, updating services, and editing these docs. Configure it once so every engineer (and AI assistant) shares the same guardrails.

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1. Project rules

mkdir -p .cursor
./.cursor/rules.md: 
# Handa Uncle backend

- Stack: Bun + Hono server, MongoDB, Redis, Auth0, Pinecone, Langfuse.
- Never delete user code unless asked. Prefer minimal diffs.
- Cite exact files (e.g. `src/services/app/services/app-launch.service.ts`).

## Critical invariants

1. `/app/launch` requires `x-device-id` + `x-platform` headers.
2. OTP flow uses Exotel with retries defined in `otp.service.ts`.
3. Rate limiting + request metadata live under `src/shared/middlewares/`.
4. Documentation must align with `docs/api-reference/openapi.json`.

## Workflow

- Run `git status` before editing and summarize existing changes.
- Use Bun for scripts/tests: `bun run dev`, `bun run typecheck`, `bun test`.
- Keep `X-Request-ID` in all new logs.
- Update MDX pages + `docs.json` together so navigation stays valid.

## Language

- Write instructions in second person.
- Include verification steps (curl response, log snippet, etc.).
- Keep tone concise and technical—this is an internal engineering audience.
Restart Cursor or reload the workspace so the new rules are applied.

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2. Command palette shortcuts

CommandWhen to run
bun run devBoot the API on http://localhost:8080
bun run typecheckBefore every commit/PR
bun test --watchIterate on service logic
mint dev --port 3334Preview the Mintlify docs
Add them to Cursor’s “Custom Commands” so they’re one keystroke away.

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3. Supplying context to AI

When Cursor asks for more information:
  • Point it to APP_LAUNCH_IMPLEMENTATION.md for device boot flow context.
  • Use MOBILE_API_ENDPOINTS.md when editing auth/app contracts.
  • Link docs/api-reference/openapi.json whenever modifying API responses.
  • Reference the exact service/controller file instead of paraphrasing.

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4. Things to avoid

  • Don’t touch .env.* files or rotate secrets from within Cursor.
  • Don’t run destructive git commands (reset --hard, clean -fd) without explicit approval.
  • Don’t invent API payloads—copy from the code, tests, or Langfuse traces.