# HANDOFF — ECR-013A Architect → Engineer

## Gate

**Parent:** WAVE0-FROZEN (`27f27a1`)

**ECR-013A + BD-2026-013A = Approved（2026-08-07 Human）**  
**Coding Start Authorization: 2026-08-07（Human）→ Engineer 可改 `apps/`。**

## Consume

1. `.ai/product/feature-spec/ops-rbac.md`  
2. ECR / PRODUCT / ENGINEERING / BD / `docs/CONTRACT_DIFF/ECR-013A.yaml`  
3. `.ai/domain/boundary-rules.md` · `glossary.yaml`  

## Do

按 ENGINEERING_SPEC Implement order。

## Do not

- UserStatus / ECR-013B  
- 真支付 · UGC · Prompt  
- 跳过 Security AC  

## Return

1. HANDOFF engineer→reviewer  
2. TEST_REPORT 映射全部 AC-ID  
3. CODE_REVIEW  
4. `ess-validate --phase review --ecr ECR-013A`