# Backend Architecture Planning

- 범위: 백엔드의 공통 구조와 구현 패턴
- 주요 축:
  - DDD bounded context
  - domain/application/infrastructure/contracts layering
  - 3-layer / hexagonal / monolithic structure
  - adoption of patterns such as EDA, MSA, CQRS
  - actual runtime composition and implementation choices
- entity/schema/relationship 정의는 `04_data`에서 다룬다.
