nestjs-patterns

conventions for NestJS APIs - module and provider design, dynamic modules, custom providers and injection tokens, provider scopes, typed ConfigModule configuration, lifecycle and shutdown hooks, the request pipeline (middleware, guards, interceptors, pipes, filters) and when to use each, custom decorators, event emitter, CQRS only when justified, circular dependency avoidance, testing-friendly design, versioning, nest-cli plugins, and common pitfalls. Load when creating or changing NestJS modules, controllers, services, providers, decorators, or cross-cutting request pipeline pieces.