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fix(incident): F2 NO_ACTION 觸發 resolve_incident + 冪等 guard
【根因】INC-20260507-99ADF2 飛輪斷流,566+ stuck incidents(30秒漲 1)核心
原因:NO_ACTION 路徑 (approval_execution.py:251) 提前 return True,跳過
line 482-495 已有的 resolve_incident 呼叫,incident 永遠卡 INVESTIGATING。

【修法】
- approval_execution.py NO_ACTION 分支補 resolve_incident 呼叫 + 成功/失敗
  log,背景 log 加 path="no_action" 用於 prod 量化修法生效率(debugger
  全鏈分析 + critic 1st/2nd 審查必修 #1)。
- incident_service.py resolve_incident 在 line 1106 加 RESOLVED 冪等 guard,
  早於所有副作用(status mutation / Redis / DB / postmortem / KB / KM /
  disposition),順帶修 success path line 482-495 重觸 postmortem 的潛在
  老風險(critic 必修 #2)。

【遵守 Codex 5/6 設計(feedback_respect_codex_design_intent.md)】
- 不動 flywheel_stats_service.py / heartbeat_report_service.py /
  auto_repair_service.record_auto_repair() / metrics_repository UPPER(status)。
- resolve_incident 不寫 auto_repair_executions 表(Codex 5/6 source of
  truth),不污染 24h KPI 計算。

【Test 覆蓋】
- test_approval_execution_no_action.py:NO_ACTION → resolve 被呼叫一次 +
  resolve raise 時仍 return True(NO_ACTION 不能因 resolve 失敗退化成 False,
  否則污染 auto_execute KPI line 207-208 註解契約)。
- test_incident_service_resolve_idempotency.py:RESOLVED → return existing +
  save_to_working_memory 不被呼叫;not_found → return None。

【驗收條件(部署後 24h)】
1. grep `path="no_action"` 中 incident_resolved_after_no_action_execution
   數量 vs background_execution_noop 數量,1:1 才算修復成功。
2. awoooi_flywheel_incidents_stuck 從每 30 秒漲 1 變平緩。
3. SRE 群 24h 內若湧入 >20 份 NO_ACTION postmortem 觸發 follow-up 評估
   resolution_type="no_action" 跳過 postmortem(critic Minor #3 方案 B)。

Refs: INC-20260507-99ADF2, debugger root cause #1 (鏈 A), critic 1st 必修
#1 #2, critic 2nd 必修 #1 #2 #3

Co-Authored-By: Codex (aider) <noreply@anthropic.com>
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
2026-05-07 18:55:58 +08:00
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