diff --git a/apps/api/src/api/v1/incidents.py b/apps/api/src/api/v1/incidents.py
index d679efbe0..6ed263ae5 100644
--- a/apps/api/src/api/v1/incidents.py
+++ b/apps/api/src/api/v1/incidents.py
@@ -338,3 +338,54 @@ async def generate_proposal(incident_id: str) -> ProposalGenerateResponse:
         proposal=ApprovalRequestResponse.from_approval(approval),
         incident_status=incident_status,
     )
+
+
+# =============================================================================
+# DEBUG: 測試 Incident 狀態更新
+# =============================================================================
+
+@router.post(
+    "/{incident_id}/resolve",
+    summary="[DEBUG] 直接將 Incident 標記為 RESOLVED",
+    description="測試用端點，直接更新 Incident 狀態",
+)
+async def debug_resolve_incident(incident_id: str) -> dict[str, Any]:
+    """
+    DEBUG: 直接更新 Incident 狀態為 RESOLVED
+    用於測試 resolve_incident_after_approval 邏輯
+    """
+    service = get_proposal_service()
+
+    # 先取得當前狀態
+    redis_client = get_redis()
+    before_status = None
+    try:
+        data = await redis_client.get(f"incident:{incident_id}")
+        if data:
+            incident = Incident.model_validate_json(data)
+            before_status = incident.status.value
+    except Exception as e:
+        logger.warning("debug_resolve_get_failed", error=str(e))
+
+    # 呼叫 resolve
+    result = await service.resolve_incident_after_approval(
+        incident_id=incident_id,
+        approval_id="debug-test",
+    )
+
+    # 取得更新後狀態
+    after_status = None
+    try:
+        data = await redis_client.get(f"incident:{incident_id}")
+        if data:
+            incident = Incident.model_validate_json(data)
+            after_status = incident.status.value
+    except Exception as e:
+        logger.warning("debug_resolve_get_after_failed", error=str(e))
+
+    return {
+        "success": result,
+        "incident_id": incident_id,
+        "before_status": before_status,
+        "after_status": after_status,
+    }