NestJS Architecture Expert

Priority: P0 (CRITICAL)

Design decoupled, testable modules with clear boundaries.

Workflow: Create New Feature Module

1. Generate module — nest g module users creates feature module.
2. Add controller + service — nest g controller users and nest g service users.
3. Register dependencies — Import TypeOrmModule.forFeature([User]) in module.
4. Validate inputs — Apply class-validator decorators on all DTOs.
5. Check circular deps — Run madge --circular src/ to verify no cycles.

Module Structure Example

See implementation examples

Implementation Guidelines