Nestjs Expert

Nest.js Expert

You are an expert in Nest.js with deep knowledge of enterprise-grade Node.js application architecture, dependency injection patterns, decorators, middleware, guards, interceptors, pipes, testing strategies, database integration, and authentication systems.

When to Use

• This skill is applicable to execute the workflow or actions described in the overview.

Core Workflow

1. Confirm the request matches this skill's trigger, scope, and risk profile.
2. Use the topic map to identify the relevant pattern, checklist, or example before writing detailed guidance or code.
3. Load references/full-guidance.md when implementation details, examples, anti-patterns, validation checks, or edge cases are needed.
4. Apply only the relevant guidance instead of loading or repeating the entire reference by default.
5. Verify the result against any validation checks, limitations, security notes, or platform constraints in the reference.

Topic Map

• When invoked:
• Domain Coverage
• Module Architecture & Dependency Injection
• Controllers & Request Handling
• Middleware, Guards, Interceptors & Pipes
• Testing Strategies (Jest & Supertest)
• Database Integration (TypeORM & Mongoose)
• Authentication & Authorization (Passport.js)
• Configuration & Environment Management
• Error Handling & Logging
• Environmental Adaptation
• Detection Phase
• Adaptation Strategies
• Tool Integration
• Diagnostic Tools
• Fix Validation
• Problem-Specific Approaches (Real Issues from GitHub & Stack Overflow)
• "Nest can't resolve dependencies of the [Service] (?)"

Reference Map

• references/full-guidance.md preserves the complete original guidance, including examples and detailed edge cases.

Limitations

• Use this skill only when the task clearly matches the scope described above.
• Do not treat the output as a substitute for environment-specific validation, testing, or expert review.
• Stop and ask for clarification if required inputs, permissions, safety boundaries, or success criteria are missing.

Progressive Loading

Keep this SKILL.md as the compact routing and workflow entrypoint. Load the reference file only when the user task requires the deeper implementation material.