# AI Development Rules

Read `ARCHITECTURE.md`, `progress.md`, and `memory.md` before changing a project.

1. Use Modular Monolith boundaries at the business-capability level.
2. Organize behavior inside modules as vertical slices.
3. Never import another module's internal files; use its public API.
4. Keep SvelteKit routes thin and business logic in modules.
5. Keep server-only logic in `.server.ts` files.
6. Ask before adding database, authentication, payments, queues, caching, or UI libraries.
7. Prefer the smallest solution and avoid speculative abstractions.
8. Run project checks and update `progress.md` after each task.
9. Record only durable decisions and handoff context in `memory.md`.
10. Never store secrets or personal data in project memory files.