# HANDOFF — ECR-013B Architect → Engineer

## Gate

**Parent:** WAVE0-FROZEN (`27f27a1`)  
**Predecessor:** ECR-013A **Closed**

**Start Authorization: 2026-08-07（Human）→ Contract Definition only**  
**ECR-013B + BD-2026-013B = Draft** — **禁止改 `apps/`** 直至：

1. Human **Approve** ECR-013B + BD-2026-013B  
2. 另发 **coding Start Authorization**

## Consume

1. `.ai/product/feature-spec/ops-account-lifecycle.md`  
2. ECR / PRODUCT / ENGINEERING / BD / `docs/CONTRACT_DIFF/ECR-013B.yaml`  
3. `.ai/domain/boundary-rules.md` · `glossary.yaml` · `entity-catalog.md`  

## Do（仅 Approve + coding auth 后）

按 ENGINEERING_SPEC Implement order。

## Do not

- soft-delete / `deleted`  
- 真支付 · UGC · Prompt  
- 跳过 Security AC（含 C 端拒绝）  
- 重做 RBAC（仅 additive permission）  

## Return

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