nest

NestJS is a progressive Node.js framework for building efficient and scalable server-side applications. It uses TypeScript by default, supports both Express and Fastify, and provides an out-of-the-box application architecture inspired by Angular. NestJS combines elements of OOP, FP, and FRP, making it ideal for building enterprise-grade applications.

The skill is based on NestJS documentation, generated at 2026-02-01.

CLI

Topic	Description	Reference
CLI Overview	Scaffolding, building, and running applications	cli-overview
Monorepo & Libraries	Workspaces, apps, shared libraries	cli-monorepo

Core References

Topic	Description	Reference
Controllers	Route handlers, HTTP methods, request/response handling	core-controllers
Modules	Application structure, feature modules, shared modules, dynamic modules	core-modules
Providers	Services, dependency injection, custom providers	core-providers
Dependency Injection	DI fundamentals, custom providers, scopes	core-dependency-injection
Middleware	Request/response middleware, functional middleware	core-middleware

Fundamentals

Topic	Description	Reference
Pipes	Data transformation and validation pipes	fundamentals-pipes
Guards	Authorization guards, role-based access control	fundamentals-guards
Interceptors	Aspect-oriented programming, response transformation	fundamentals-interceptors
Exception Filters	Error handling, custom exception filters	fundamentals-exception-filters
Custom Decorators	Creating custom parameter decorators	fundamentals-custom-decorators
Dynamic Modules	Configurable modules, module configuration	fundamentals-dynamic-modules
Execution Context	Accessing request context, metadata reflection	fundamentals-execution-context
Provider Scopes	Singleton, request-scoped, transient providers	fundamentals-provider-scopes
Lifecycle Events	Application and provider lifecycle hooks	fundamentals-lifecycle-events
Lazy Loading	Loading modules on-demand for serverless	fundamentals-lazy-loading
Circular Dependency	Resolving circular dependencies with forwardRef	fundamentals-circular-dependency
Module Reference	Accessing providers dynamically with ModuleRef	fundamentals-module-reference
Testing	Unit testing and e2e testing with @nestjs/testing	fundamentals-testing

Techniques

Topic	Description	Reference
Validation	ValidationPipe, class-validator, DTO validation	techniques-validation
Configuration	Environment variables, ConfigModule, configuration management	techniques-configuration
Database	TypeORM, Prisma, MongoDB integration	techniques-database
Caching	Cache manager, Redis integration, auto-caching	techniques-caching
Logging	Built-in logger, custom loggers, JSON logging	techniques-logging
File Upload	File upload handling with multer, validation	techniques-file-upload
Versioning	URI, header, and media type API versioning	techniques-versioning
Serialization	Response serialization with class-transformer	techniques-serialization
Queues	Background job processing with BullMQ	techniques-queues
Task Scheduling	Cron jobs, intervals, and timeouts	techniques-task-scheduling
Events	Event-driven architecture with EventEmitter	techniques-events
HTTP Module	Making HTTP requests with Axios	techniques-http-module
Fastify	Using Fastify for better performance	techniques-fastify
Sessions & Cookies	HTTP sessions and cookies for stateful apps	techniques-sessions-cookies
Streaming & SSE	Compression, file streaming, Server-Sent Events	techniques-compression-streaming-sse
MVC & Serve Static	Template rendering (Handlebars) and SPA static serving	techniques-mvc-serve-static

Security

Topic	Description	Reference
Authentication	Passport integration, JWT authentication	recipes-authentication
Authorization	RBAC, claims-based, CASL integration	security-authorization
CORS & Rate Limiting	CORS, Helmet, ThrottlerModule	security-cors-helmet-rate-limiting
Encryption & Hashing	bcrypt, argon2, password hashing	security-encryption-hashing

OpenAPI

Topic	Description	Reference
Swagger	OpenAPI documentation generation	openapi-swagger

WebSockets

Topic	Description	Reference
Gateways	Real-time communication with Socket.IO/ws	websockets-gateways
Guards & Exception Filters	WsException, BaseWsExceptionFilter, interceptors, pipes	websockets-advanced

Microservices

Topic	Description	Reference
Overview	Transport layers, message patterns, events	microservices-overview
gRPC	Protocol Buffers, streaming, metadata, reflection	microservices-grpc
Transports	Redis, Kafka, NATS, RabbitMQ configuration	microservices-transports

GraphQL

Topic	Description	Reference
Overview	Code-first and schema-first approaches	graphql-overview
Resolvers & Mutations	Queries, mutations, field resolvers	graphql-resolvers-mutations
Subscriptions	Real-time subscriptions with PubSub	graphql-subscriptions
Scalars, Unions & Enums	Interfaces, scalars, union types, enums	graphql-scalars-unions-enums

Recipes

Topic	Description	Reference
CRUD Generator	Nest CLI resource generator	recipes-crud-generator
Documentation	OpenAPI/Swagger integration	recipes-documentation
TypeORM	TypeORM integration and usage	recipes-typeorm
Prisma	Prisma ORM integration	recipes-prisma
Mongoose	MongoDB with Mongoose ODM	recipes-mongoose
CQRS	Command Query Responsibility Segregation	recipes-cqrs
Terminus	Health checks and readiness/liveness probes	recipes-terminus

FAQ

Topic	Description	Reference
Raw Body & Hybrid	Webhook signature verification, HTTP + microservices	faq-raw-body-hybrid

Best Practices

Topic	Description	Reference
Request Lifecycle	Understanding execution order and flow	best-practices-request-lifecycle

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CLI

Core References

Fundamentals

Techniques

Security

OpenAPI

WebSockets

Microservices

GraphQL

Recipes

FAQ

Best Practices

Source Transparency

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