diff --git a/src/retk/controllers/ai/knowledge.py b/src/retk/controllers/ai/knowledge.py
index 84b8ae5..e50d80e 100644
--- a/src/retk/controllers/ai/knowledge.py
+++ b/src/retk/controllers/ai/knowledge.py
@@ -9,14 +9,24 @@ async def get_extended_nodes(
         au: AuthedUser,
 ) -> schemas.ai.GetExtendedNodesResponse:
     docs = await core.ai.llm.knowledge.extended.get_extended_nodes(uid=au.u.id)
-    return schemas.ai.GetExtendedNodesResponse(
-        requestId=au.request_id,
-        nodes=[schemas.ai.GetExtendedNodesResponse.Node(
+    nodes = []
+    for doc in docs:
+        res = doc["extendMd"].split("\n", 1)
+        if len(res) == 2:
+            title, content = res
+        else:
+            title, content = res[0], ""
+        node = schemas.ai.GetExtendedNodesResponse.Node(
             id=str(doc["_id"]),
             sourceNid=doc["sourceNid"],
             sourceTitle=doc["sourceMd"].split("\n", 1)[0].strip(),
-            md=doc["extendMd"],
-        ) for doc in docs]
+            title=title.strip(),
+            content=content.strip(),
+        )
+        nodes.append(node)
+    return schemas.ai.GetExtendedNodesResponse(
+        requestId=au.request_id,
+        nodes=nodes
     )
 
 
diff --git a/src/retk/controllers/schemas/ai.py b/src/retk/controllers/schemas/ai.py
index 317998f..947e5e6 100644
--- a/src/retk/controllers/schemas/ai.py
+++ b/src/retk/controllers/schemas/ai.py
@@ -8,7 +8,8 @@ class Node(BaseModel):
         id: str
         sourceNid: str
         sourceTitle: str
-        md: str
+        title: str
+        content: str
 
     requestId: str
     nodes: List[Node]
diff --git a/src/retk/controllers/user.py b/src/retk/controllers/user.py
index 54c9e84..c610004 100644
--- a/src/retk/controllers/user.py
+++ b/src/retk/controllers/user.py
@@ -15,6 +15,7 @@ async def get_user(
         max_space = 0
     else:
         max_space = const.USER_TYPE.id2config(au.u.type).max_store_space
+    total_nodes = await core.user.get_user_nodes_count(uid=au.u.id, disabled=False, in_trash=False)
     return schemas.user.UserInfoResponse(
         requestId=au.request_id,
         user=schemas.user.UserInfoResponse.User(
@@ -38,7 +39,7 @@ async def get_user(
                 editorSepRightWidth=au.u.settings.editor_sep_right_width,
                 editorSideCurrentToolId=au.u.settings.editor_side_current_tool_id,
             ),
-            totalNodes=await core.user.get_user_nodes_count(uid=au.u.id, disabled=False, in_trash=False),
+            totalNodes=total_nodes,
         ),
     )
 
diff --git a/src/retk/routes/ai.py b/src/retk/routes/ai.py
index 71f6900..6fe198d 100644
--- a/src/retk/routes/ai.py
+++ b/src/retk/routes/ai.py
@@ -8,7 +8,7 @@
 
 router = APIRouter(
     prefix="/api/ai",
-    tags=["node"],
+    tags=["ai"],
     responses={404: {"description": "Not found"}},
 )
 
diff --git a/tests/test_api.py b/tests/test_api.py
index ba69bb8..fef2319 100644
--- a/tests/test_api.py
+++ b/tests/test_api.py
@@ -1598,7 +1598,8 @@ async def test_node_extend(self):
         rj = self.check_ok_response(resp, 200)
         self.assertEqual(1, len(rj["nodes"]))
         n = rj["nodes"][0]
-        self.assertEqual("this is extended md", n["md"])
+        self.assertEqual("this is extended md", n["title"])
+        self.assertEqual("", n["content"])
         self.assertEqual(node["id"], n["sourceNid"])
 
         resp = self.client.post(