Cc Skill Backend Patterns

This is a solid reference for backend patterns you'll actually use in production Node.js apps. It covers the repository pattern for abstracting data access, service layers for business logic, and middleware chains for auth. The database section is practical, showing how to avoid N+1 queries and use transactions with Supabase's RPC functions. Also includes caching strategies with Redis, centralized error handling with custom error classes, and retry logic with exponential backoff. It's written for Express and Next.js API routes specifically, so the examples drop right into those contexts. Good for teams that want consistent patterns across their backend code without reinventing common solutions.