9 builder options across 6 categories.
Node.js runs JavaScript on the server, powering everything from REST APIs to real-time applications. Agent rules commonly cover async patterns (promises vs async/await vs callbacks), Express/Fastify conventions, npm/pnpm workspace setup, and Jest/Vitest testing patterns.
Error handling strategies
Security best practices
Community-sourced coding standards
Testing frameworks and conventions
Infrastructure, CI/CD, and DevOps tools