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問題根因: GET /incidents 觸發 Phase 2 Agent Debate → LLM 全失敗 → description="待分析" + action="" → 每隔幾分鐘廣播新 Telegram 卡片 → 告警疲勞(SRE 最致命的殺手) 架構缺陷 (anti-pattern): GET 請求(讀取操作)產生對外廣播副作用 → 違反 RESTful 原則 修復 (_push_decision_to_telegram): 在 DB 更新完成後、Telegram 推送前加入閘門: description="待分析" AND action="" → 靜默退出,絕不廣播 ADR-091 鐵律: 只有 Alertmanager Webhook POST(真實新告警)可觸發 Telegram 廣播 Agent Debate 失敗分析 → 靜默 DB 更新,不污染頻道 2026-04-17 ogt + Claude Sonnet 4.6 Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>