nestjs-expert

To fix Nest.js dependency injection errors, inspect your module structure to ensure all required providers are correctly registered and exported. This Skill diagnoses missing providers, circular dependencies, and improper module boundaries to resolve injection failures.

Nest.js JWT authentication unauthorized errors often stem from misconfigured guards or validation pipelines. This Skill inspects your authentication flow and request lifecycle setup to locate the root cause and apply the correct Nest.js security pattern.

Resolving circular dependency in Nest.js modules requires analyzing provider boundaries and using forward references. This Skill evaluates your module architecture to detect export mistakes, identify circular dependencies, and restructure providers correctly.

Yes, you can debug Nest.js controller routing and validation pipelines by providing your controller files for review. This Skill resolves routing issues, middleware order, guards, interceptors, and pipe behaviors to ensure correct request handling.

The best way to set up Nest.js testing involves validating your test environment and module configuration against framework best practices. This Skill improves unit, integration, and e2e test setup by diagnosing why services fail to inject during tests.

To troubleshoot Nest.js database integration problems, inspect your runtime setup and TypeScript configuration. This Skill validates database integration and debugging workflows to ensure your enterprise Node.js services behave correctly.