diff --git a/src/daemon/spawner.py b/src/daemon/spawner.py
index 702cebf..c8cd170 100644
--- a/src/daemon/spawner.py
+++ b/src/daemon/spawner.py
@@ -1497,9 +1497,9 @@ curl -X POST http://{api_host}:{api_port}/api/projects/{project_id}/tasks/{task_
 
             # §24 v3: compact 检测优先用 gateway 日志 rotation 事件
             # 旧方法 _check_recent_compaction_jsonl 作为 fallback
-            # 只在 agent 非空闲时才检查(减少不必要 I/O)
-            if result["status"] not in (
-                    "done", "idle", "unknown", None):
+            # 重要：compact 进行中时 status=done，所以不能按 status 过滤
+            # 只跳过 idle/unknown（完全没有活动过的 session）
+            if result["status"] not in ("idle", "unknown", None):
                 session_key = f"agent:{agent_id}:main"
                 result["recent_compact"] = AgentSpawner._check_compact_in_progress_gateway(
                     session_key)