Iron Law: Always load the nestjs-api skill before writing NestJS code; never generate Prisma or Fastify patterns without consulting current documentation.

NestJS + TypeScript Coding Standards

Standards for readable, maintainable TypeScript code in NestJS 11.x + Fastify services.

Core Principles

• Prefer clarity over cleverness
• Immutable by default; minimize shared mutable state
• Fail fast with meaningful exceptions
• Consistent naming and module structure

Key Rules