diff --git a/app/agent/callback/__init__.py b/app/agent/callback/__init__.py
index e2d8ae6f..8d2268c5 100644
--- a/app/agent/callback/__init__.py
+++ b/app/agent/callback/__init__.py
@@ -98,6 +98,19 @@ class StreamingHandler:
             self._message_response = None
             self._msg_start_offset = 0
 
+    def reset(self):
+        """
+        重置缓冲区，清空已发送的文本从头更新，但保持消息编辑能力。
+
+        与 clear 的区别：
+        - clear：完全重置所有状态，后续会开新消息
+        - reset：只清空buffer，保留消息编辑状态，后续继续编辑同一条消息
+        """
+        with self._lock:
+            self._buffer = ""
+            self._sent_text = ""
+            self._msg_start_offset = 0
+
     async def start_streaming(
         self,
         channel: Optional[str] = None,
diff --git a/app/agent/tools/base.py b/app/agent/tools/base.py
index 3cee990c..761230e3 100644
--- a/app/agent/tools/base.py
+++ b/app/agent/tools/base.py
@@ -59,8 +59,8 @@ class MoviePilotTool(BaseTool, metaclass=ABCMeta):
                 if tool_message:
                     self._stream_handler.emit(f"\n\n⚙️ => {tool_message}\n\n")
             else:
-                # 非VERBOSE，不输出最后结果前的消息
-                self._stream_handler.clear()
+                # 非VERBOSE，重置缓冲区从头更新，保持消息编辑能力
+                self._stream_handler.reset()
         else:
             # 非流式渠道：保持原有行为，取出 Agent 文字 + 工具消息合并独立发送
             agent_message = (