backend-dev-guidelines

Node.js/Express/TypeScript microservices development patterns. Use when working with backend code: routes, controllers, services, repositories, middleware, APIs. Covers: - Layered architecture (routes → controllers → services → repositories) - Express routing and middleware patterns - Prisma database access and ORM best practices - Zod validation and input sanitization - Sentry error tracking integration - BaseController pattern and dependency injection - Async/await patterns and error handling - Testing strategies and performance monitoring