NestJS Development Standards

Module Organization Principles

Domain-Centric Modularization

Organize modules by business domain, not by function.

• ❌ Bad: controllers/, services/, repositories/
• ✅ Good: users/, products/, orders/

Single Responsibility Module

Each module is responsible for only one domain.

• Separate common functionality into common/ or shared/ modules
• Inter-domain communication must go through Services only

Dependency Injection Rules