diff --git a/docs/design/02-main-session-delegation.md b/docs/design/02-main-session-delegation.md
index 428f091..ba79732 100644
--- a/docs/design/02-main-session-delegation.md
+++ b/docs/design/02-main-session-delegation.md
@@ -384,8 +384,9 @@ def _task_verify_completion(self, task_id, db_path) -> bool:
         row = conn.execute(
             "SELECT status FROM tasks WHERE id=?", (task_id,)
         ).fetchone()
-        if not row or row["status"] == "working":
-            return None  # 还在执行中，不算完成
+        TERMINAL_STATES = {"review", "done", "failed", "cancelled"}
+        if not row or row["status"] in TERMINAL_STATES:
+            return True  # Agent 自己标了终态
 
         # 信号 2：outputs 表有产出
         output_count = conn.execute(