Sections

This file defines all sections, their ordering, impact levels, and descriptions. The section ID (in parentheses) is the filename prefix used to group rules.

1. Architecture (arch)

Impact: CRITICAL Description: Proper module organization and dependency management are the foundation of maintainable NestJS applications. Circular dependencies and god services are the #1 architecture killer.

2. Dependency Injection (di)

Impact: CRITICAL Description: NestJS's IoC container is powerful but can be misused. Understanding scopes, injection tokens, and proper patterns is essential for testable code.

3. Error Handling (error)

Impact: HIGH Description: Consistent error handling improves debugging, user experience, and API reliability. Centralized exception filters ensure uniform error responses.

4. Security (security)

Impact: HIGH Description: Security vulnerabilities can be catastrophic. Input validation, authentication, authorization, and data protection are non-negotiable.

5. Performance (perf)

Impact: HIGH Description: Optimizing request handling, caching, and database queries directly impacts application responsiveness and scalability.

6. Testing (test)

Impact: MEDIUM-HIGH Description: Well-tested applications are more reliable. NestJS testing utilities enable comprehensive unit and e2e coverage.

7. Database & ORM (db)

Impact: MEDIUM-HIGH Description: Proper database access patterns, transactions, and query optimization are crucial for data-intensive applications.

8. API Design (api)

Impact: MEDIUM Description: RESTful conventions, versioning, DTOs, and consistent response formats improve API usability and maintainability.

9. Microservices (micro)

Impact: MEDIUM Description: Building distributed systems requires understanding message patterns, health checks, and inter-service communication.

10. DevOps & Deployment (devops)

Impact: LOW-MEDIUM Description: Configuration management, structured logging, and graceful shutdown ensure production readiness and zero-downtime deployments.