diff --git a/apps/api/src/services/decision_manager.py b/apps/api/src/services/decision_manager.py
index 52b61a59..322e9242 100644
--- a/apps/api/src/services/decision_manager.py
+++ b/apps/api/src/services/decision_manager.py
@@ -268,6 +268,31 @@ async def _push_decision_to_telegram(
         # ② NO_ACTION + critical → TYPE-4：critical 事件不能靜默，即便 AI 無法自動修復
         # ③ NO_ACTION + non-critical → TYPE-1：一般資訊告警，純資訊卡即可
         _blocked_reason = proposal_data.get("blocked_reason", "")
+
+        # 2026-04-17 ogt + Claude Sonnet 4.6: Inline YAML NO_ACTION 補查
+        # 根因：Phase 2 路徑（agent debate → auto_approve 拒絕 → 直接推 TG）不經過
+        #       auto_execute() 的 YAML check（lines 1427-1439），Coordinator 不設 blocked_reason。
+        # 修復：在 _push_decision_to_telegram 內做一次 alertname 查詢，任何路徑都能偵測 NO_ACTION。
+        if not _blocked_reason and incident.signals:
+            try:
+                from src.services.alert_rule_engine import match_rule as _notif_match
+                _notif_alertname = incident.signals[0].labels.get("alertname", "")
+                if _notif_alertname:
+                    _notif_rule = _notif_match({
+                        "labels": incident.signals[0].labels,
+                        "alert_type": _notif_alertname,
+                        "message": "",
+                        "target_resource": target,
+                        "namespace": "awoooi-prod",
+                    })
+                    if _notif_rule:
+                        if _notif_rule.get("blocked_reason", "").startswith("INVALID_TARGET"):
+                            _blocked_reason = _notif_rule["blocked_reason"]
+                        elif _notif_rule.get("suggested_action") == "NO_ACTION":
+                            _blocked_reason = f"YAML: NO_ACTION for {_notif_alertname}"
+            except Exception:
+                pass  # 查詢失敗不影響主流程
+
         if "INVALID_TARGET" in _blocked_reason:
             _notif_type = NotificationType.TYPE_4
         elif "NO_ACTION" in _blocked_reason: