diff --git a/src/daemon/inbox.py b/src/daemon/inbox.py
index 44070e8..249da12 100644
--- a/src/daemon/inbox.py
+++ b/src/daemon/inbox.py
@@ -251,29 +251,15 @@ async def default_inbox_callback(
             conn.close()
 
     elif event_type == "agent_status":
-        # Agent 状态变更 → 更新 tasks 表
+        # Agent 状态变更 → 通过 Blackboard 状态机校验
         new_status = event.get("status")
         if new_status and task_id:
-            conn = get_connection(db_path)
-            try:
-                conn.execute("BEGIN IMMEDIATE")
-                row = conn.execute(
-                    "SELECT status FROM tasks WHERE id=?", (task_id,)
-                ).fetchone()
-                if row:
-                    old = row["status"]
-                    conn.execute(
-                        "UPDATE tasks SET status=?, updated_at=datetime('now') WHERE id=?",
-                        (new_status, task_id),
-                    )
-                    conn.execute(
-                        "INSERT INTO events (task_id, agent, event_type, detail) VALUES (?,?,?,?)",
-                        (task_id, agent, f"task_{new_status}",
-                         json.dumps({"from": old, "to": new_status})),
-                    )
-                    conn.commit()
-            finally:
-                conn.close()
+            from src.blackboard.operations import Blackboard
+            bb = Blackboard(db_path)
+            ok = bb.update_task_status(task_id, new_status, agent=agent)
+            if not ok:
+                logger.warning("Inbox: invalid status transition to '%s' for task %s",
+                               new_status, task_id)
 
     elif event_type == "agent_claim":
         # Agent 认领任务