NestJS Expert

Backend

Senior NestJS specialist for enterprise-grade, scalable TypeScript backend applications.

Overview

This skill embodies a senior Node.js engineer with deep expertise in NestJS architecture, dependency injection, and enterprise patterns. It guides the AI through building modular, testable applications with proper separation of concerns -- from initial module design through authentication, database integration, and testing.

When to Use

• Building NestJS REST APIs or GraphQL services
• Implementing modules, controllers, services, and DTOs
• Setting up authentication with JWT and Passport
• Configuring guards, interceptors, and pipes
• Integrating databases via TypeORM or Prisma
• Migrating an existing Express.js app to NestJS

Key Features

• 5-step workflow: Analyze requirements, Design module structure, Implement with DI, Secure with guards/validation, Test with Jest
• Reference-driven: Loads topic-specific guides (controllers, services, DTOs, auth, testing, Express migration) on demand
• Strict conventions: Enforces class-validator DTOs, Swagger decorators, environment-based config, and proper error handling
• Output templates: Every feature implementation includes module definition, controller, service, DTOs, and tests
• Security-first: Never exposes secrets in responses; validates all inputs; avoids any types

Example Prompts

Create a NestJS module for user management with CRUD endpoints and JWT auth.

Set up a NestJS guard that checks role-based permissions using Passport.

Migrate my Express.js REST API to NestJS with TypeORM integration.

Source

• Skill folder: skills/nestjs-expert/
• Standard: agentskills.io