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christopherclemmons
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nestjs

Create modular NestJS APIs with DTO validation and dependency injection.

Updated Apr 14, 2026
Search Tags:#typescript#api#validation#backend#dto#nestjs#dependency-injection
One-click install
npx skills add https://github.com/christopherclemmons/startupkit --skill nestjs-christopherclemmons
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: nestjs
Source: https://github.com/christopherclemmons/startupkit/tree/main/skills/nestjs
Command: npx skills add https://github.com/christopherclemmons/startupkit --skill nestjs-christopherclemmons

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

Provides a senior NestJS backend engineering persona and prescriptive guidance to design, implement, and maintain modular, testable, and production-ready APIs that follow NestJS conventions while solving real-world backend complexity.

Core Features & Use Cases

  • Modular Architecture: Guidance on modules, controllers, services, and providers to keep features encapsulated and maintainable.
  • Explicit Contracts & Validation: Emphasis on DTOs, class-validator, and ValidationPipe to enforce consistent input/output contracts.
  • Production Concerns: Recommendations for error handling, logging, dependency injection discipline, authentication/authorization, and testability for reliable deployments.
  • Use Case: Implement a leads API with DTO validation, a thin controller, service-layer business logic, DI-managed repository integration, and consistent error responses.

Quick Start

Generate a feature module named users with a controller, service, DTOs using class-validator, a global ValidationPipe, and unit tests to validate behavior.

Frequently Asked Questions about nestjs

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I structure a production-ready NestJS API with controllers, services, and DTOs?▼

A production-ready NestJS API uses modular architecture with thin controllers, service-layer business logic, and DTOs with class-validator to enforce explicit input and output contracts for maintainable, testable backend code.

How do I validate request data in a NestJS backend using class-validator?▼

Validate request data in a NestJS backend by defining Data Transfer Objects and applying a global ValidationPipe with class-validator, ensuring predictable error handling and consistent API input contracts across all endpoints.

What is dependency injection in NestJS and how does it help build scalable APIs?▼

Dependency injection in NestJS manages the instantiation and sharing of service providers across modules, keeping features encapsulated and promoting testability for scalable, production-grade TypeScript server-side applications.

Can I use NestJS for both REST and GraphQL backend development?▼

Yes, NestJS supports both REST and GraphQL backend development, providing modular organization, authentication guards, and predictable error handling patterns suitable for building scalable APIs in either architectural style.

What's the best way to organize NestJS modules for a scalable backend architecture?▼

The best way to organize NestJS modules is to encapsulate features into distinct modules with dedicated controllers, services, and providers, maintaining dependency injection discipline and separating DTO validation from business logic for scalability.

Do I need TypeScript to build a scalable NestJS API with proper validation?▼

TypeScript is required to build a NestJS API with proper validation, as the framework relies on TypeScript decorators for class-validator DTOs, dependency injection, and modular controllers to achieve production-grade patterns.

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