nestjs

NestJS modules, DI, guards, interceptors, OpenAPI. Use when building NestJS applications.

SKILL.md

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nestjs

Build structured server-side apps with NestJS.

Architecture

  • Modules organize feature domains
  • Controllers handle HTTP requests
  • Providers (services) contain business logic
  • Dependency injection via constructor injection

Decorators & Guards

  • Guards for auth/role-based access control
  • Interceptors for request/response transformation
  • Pipes for validation and transformation
  • Exception filters for structured error responses

OpenAPI / Swagger

  • @nestjs/swagger decorators for API docs
  • DTO classes with class-validator decorators
  • Auto-generated Swagger UI at /api

Database

  • TypeORM or Prisma integration via modules
  • Repository pattern with @InjectRepository
  • Migrations for schema versioning

Testing & Microservices

  • Jest with Test.createTestingModule
  • Microservices via @nestjs/microservices (TCP, Redis, RabbitMQ, Kafka)
  • Hybrid apps with HTTP + microservice

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