Wave 7: collaboration framework hardening (W10.1-W10.4)

Pure agents/ documentation work — first contributions from 4
previously-idle members (yang/li/zhu/xu).

- W10.1 yang: WORKFLOW §11-§13 — collaboration state machine
  (9 states / 16 transitions), 10-item acceptance checklist,
  7-scenario failure rollback playbook (+227 lines)
- W10.2 li: agents/STATUS.md — live roster + group + Wave
  progress snapshot (65 lines)
- W10.3 zhu: agents/PROMPT_TEMPLATE.md — subagent prompt
  template with 6 anti-patterns + 1 worked example +
  4-step pre-dispatch checklist (193 lines)
- W10.4 xu: agents/POSTMORTEM.md — 5 incident records
  (PM-001 stale-obj, PM-002 boost-json, PM-003 cross-DLL-heap,
  PM-004 loader-fail-fast, PM-005 push-force) + 7 defensive
  rules (172 lines)

No code changes. WORKFLOW.md §9 has a pointer to the new
PROMPT_TEMPLATE.md. STATUS.md updated to reflect W10.1
completion (yang status flipped working→idle).

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

agents/qa-xu/profile.md

@@ -24,5 +24,8 @@ performance_log:
   - date: 2026-05-27
     event: "B3 三方案破坏性评审：否决 A3/B1/C2，上报恶意管道 OOM 路径"
     rating: good
+  - date: 2026-05-27
+    event: "W10.4 创建 agents/POSTMORTEM.md 项目级踩坑记录（172行），收录 PM-001~PM-005 共5条事故7条防御性规则，覆盖 stale obj / Boost.JSON 链接 / 跨DLL堆释放 / plugin_loader fail-fast / push --force 未告知"
+    rating: completed
 current_groups: []
 ---