# domain-core — pure domain layer

## Registered identity

- Module ID: `domain-core`
- Gradle path: `:domain-core`
- Focused test (derived from Gradle path): `./gradlew :domain-core:test --console=plain`
- Runtime baseline: Java 21; repository framework baseline: Spring Boot 4.0.0.
- Registry SSOT: `src/config/architecture/modules.json`.

Package root: `dev.caskeleton.domain`.

코드 주석에서 덜어낸 **설계 결정의 근거**는 [README.md](README.md) 가 모아둔다 (이 문서는 모듈 규칙 SSOT).

## Responsibility

- Business concepts, entities, value objects, enums, domain events, domain services.
- Repository ports where this reference implementation still keeps domain-owned persistence contracts.
- Domain invariants and core rules.

## Allowed

- Java standard library.
- Value-only shared operational types only if truly needed.

## Forbidden

- Spring annotations.
- JPA annotations.
- Servlet/HTTP types.
- Adapter, application, bootstrap, or presentation DTO dependencies.

## Test

```bash
cd src
./gradlew :domain-core:test
```