diff --git a/pipeline_service/agent_loop_v2.py b/pipeline_service/agent_loop_v2.py
index f6fc3b6..ad865c8 100644
--- a/pipeline_service/agent_loop_v2.py
+++ b/pipeline_service/agent_loop_v2.py
@@ -845,6 +845,7 @@ class AgentExecutor:
             r = recs[0]
             self.project_id = getattr(r, "id", "")
             await self._persist_project(sor, self.project_id)
+            await self._refresh_workspace_dir(sor)
             return f"OK: 已切换到 {getattr(r, 'name', name)}"
 
         # LLM 分类匹配
@@ -866,12 +867,28 @@ class AgentExecutor:
                 r = recs2[0]
                 self.project_id = getattr(r, "id", "")
                 await self._persist_project(sor, self.project_id)
+                await self._refresh_workspace_dir(sor)
                 return f"OK: 已切换到 {getattr(r, 'name', matched)}"
         except Exception:
             pass
 
         return f"未找到项目: {name}"
 
+    async def _refresh_workspace_dir(self, sor):
+        """切换项目后同步刷新工作目录（与上传落盘/初始化同一解析逻辑）。
+
+        不刷新则 list_files/read_file 仍停在切换前的目录（或无项目时的总根）。
+        """
+        try:
+            from .workspace import get_project_dir_by_id
+            _pdir, _ = await get_project_dir_by_id(sor, self.project_id)
+            if _pdir:
+                import os as _os
+                _os.makedirs(_pdir, exist_ok=True)
+                self.workspace_dir = _pdir
+        except Exception:
+            pass
+
     async def _t_create_project(self, sor, p, pid):
         import os
         import re