nestjs-expert · davila7 — Claude Code skill: Nest.js expertise on demand

What nestjs-expert does

This skill makes Claude act as a Nest.js specialist. It covers module architecture, dependency injection, decorators, middleware, guards, interceptors, and pipes. Ask it about a problem in your Nest.js app and it inspects the project first with Read, Grep, and Glob, checks the framework version and module layout, then works out a fix.

Testing and databases get their own coverage. The skill uses @nestjs/testing, Jest, and Supertest for tests, and @nestjs/typeorm or @nestjs/mongoose for data layers, including transactions and migrations. Authentication runs through @nestjs/passport and @nestjs/jwt. Validation follows a fixed order: typecheck, unit tests, integration tests, e2e tests. If your problem is not really about Nest.js, the skill says so and points you to a better-suited subagent — typescript-type-expert for pure type issues, for instance.

Diagnostic commands are built in: they look for nest-cli.json, check package.json for @nestjs/core, and detect which integrations are wired up. The skill advises one-shot checks only, no watch or serve processes. Install it with npx claude-code-templates@latest --skill development/nestjs-expert.