ddd-tactical-design

# Domain-Driven Design: Tactical Design ## 前置协议 ### 环境检测 ```bash # 检测当前项目信息 PROJECT_ROOT=$(git rev-parse --show-toplevel 2>/dev/null || echo "unknown") BRANCH=$(git branch --show-current 2>/dev/null || echo "unknown") COMMIT=$(git rev-parse --short HEAD 2>/dev/null || echo "unknown") echo "PROJECT: $PROJECT_ROOT" echo "BRANCH: $BRANCH" echo "COMMIT: $COMMIT" ``` ### 前置技能检查 **benefits-from 检查**： ```bash # 检查 ddd-strategic-design 工件 STRATEGIC_ARTIFACT="memory/artifacts/ddd-strategic/latest.json" if [ -f "$STRATEGIC_ARTIFACT" ]; then echo "FOUND: ddd-strategic-design artifact" # 提取限界上下文信息，指导战术设计 else echo "INFO: No ddd-strategic-design artifact found" echo "Consider running /ddd-strategic-design first to identify bounded contexts" fi ``` **工件目录初始化**： ```bash mkdir -p memory/artifacts/ddd-tactical ``` # Domain-Driven Design: Tactical Design ## Overview Tactical design provides building blocks for implementing domain models within a bounded context. These patterns help translate domain concepts into code that protects business rules and ensures data consistency. **Core building blocks:** - **Aggregate**: Consistency boundary with a root entity - **Entity**: Object defined by identity, not attributes - **Value Object**: Immutable object defined by attributes - **Domain Service**: Operations that don't belong to entities - **Repository**: Persistence abstraction (collection-like) - **Domain Event**: Something happened in the domain **Why it matters:** Without ...