diff --git a/lang_agent/base.py b/lang_agent/base.py
index 7e33f35..0e32e6d 100644
--- a/lang_agent/base.py
+++ b/lang_agent/base.py
@@ -6,7 +6,7 @@ from PIL import Image
 from io import BytesIO
 import matplotlib.pyplot as plt
 from loguru import logger
-import jax
+from lang_agent.utils import tree_leaves
 
 from langgraph.graph.state import CompiledStateGraph
 from langchain_core.messages import BaseMessage, HumanMessage, SystemMessage
@@ -67,7 +67,7 @@ class GraphBase(ABC):
         else:
             state = self.workflow.invoke({"inp": nargs})
             
-            msg_list = jax.tree.leaves(state)
+            msg_list = tree_leaves(state)
 
             for e in msg_list:
                 if isinstance(e, BaseMessage):
@@ -90,7 +90,7 @@ class GraphBase(ABC):
         else:
             state = await self.workflow.ainvoke({"inp": nargs})
             
-            msg_list = jax.tree.leaves(state)
+            msg_list = tree_leaves(state)
 
             for e in msg_list:
                 if isinstance(e, BaseMessage):
diff --git a/lang_agent/graphs/react.py b/lang_agent/graphs/react.py
index 9960b5a..a488336 100644
--- a/lang_agent/graphs/react.py
+++ b/lang_agent/graphs/react.py
@@ -1,11 +1,11 @@
 from dataclasses import dataclass, field, is_dataclass
 from typing import Type, List, Callable, Any, AsyncIterator
 import tyro
-import jax
 
 from lang_agent.config import KeyConfig
 from lang_agent.components.tool_manager import ToolManager, ToolManagerConfig
 from lang_agent.base import GraphBase
+from lang_agent.utils import tree_leaves
 
 from langchain.chat_models import init_chat_model
 from langchain_core.messages import SystemMessage, HumanMessage, BaseMessage
@@ -63,7 +63,7 @@ class ReactGraph(GraphBase):
         else:
             out = self.agent.invoke(*nargs, **kwargs)
 
-        msgs_list = jax.tree.leaves(out)
+        msgs_list = tree_leaves(out)
 
         for e in msgs_list:
             if isinstance(e, BaseMessage):
@@ -87,7 +87,7 @@ class ReactGraph(GraphBase):
         else:
             out = await self.agent.ainvoke(*nargs, **kwargs)
 
-        msgs_list = jax.tree.leaves(out)
+        msgs_list = tree_leaves(out)
 
         for e in msgs_list:
             if isinstance(e, BaseMessage):
@@ -112,14 +112,17 @@ if __name__ == "__main__":
         "messages": [SystemMessage("you are a helpful bot named jarvis"),
                      HumanMessage("use the calculator tool to calculate 92*55 and say the answer")]
     },{"configurable": {"thread_id": "3"}}
-    
-    for chunk, metadata in graph.stream({"inp": nargs}, stream_mode="messages"):
-        node = metadata.get("langgraph_node")
-        if node not in ("model"):
-            print(node)
-            continue  # skip router or other intermediate nodes
 
-        # Print only the final message content
-        if isinstance(chunk, (BaseMessageChunk, BaseMessage)) and getattr(chunk, "content", None):
-            print(chunk.content, end="", flush=True)
+    out = route.invoke(*nargs)
+    assert 0
+    
+    # for chunk, metadata in graph.stream({"inp": nargs}, stream_mode="messages"):
+    #     node = metadata.get("langgraph_node")
+    #     if node not in ("model"):
+    #         print(node)
+    #         continue  # skip router or other intermediate nodes
+
+    #     # Print only the final message content
+    #     if isinstance(chunk, (BaseMessageChunk, BaseMessage)) and getattr(chunk, "content", None):
+    #         print(chunk.content, end="", flush=True)
     
\ No newline at end of file
diff --git a/lang_agent/graphs/routing.py b/lang_agent/graphs/routing.py
index 29ab0a5..b135134 100644
--- a/lang_agent/graphs/routing.py
+++ b/lang_agent/graphs/routing.py
@@ -3,7 +3,6 @@ from typing import Type, TypedDict, Literal, Dict, List, Tuple, Any, AsyncIterat
 import tyro
 from pydantic import BaseModel, Field
 from loguru import logger
-import jax
 import os.path as osp
 import commentjson
 import glob
diff --git a/lang_agent/graphs/tool_nodes.py b/lang_agent/graphs/tool_nodes.py
index b59fb4d..3923f2d 100644
--- a/lang_agent/graphs/tool_nodes.py
+++ b/lang_agent/graphs/tool_nodes.py
@@ -11,7 +11,7 @@ from lang_agent.components.tool_manager import ToolManager
 from lang_agent.components.reit_llm import ReitLLM
 from lang_agent.base import ToolNodeBase
 from lang_agent.graphs.graph_states import State, ChattyToolState
-from lang_agent.utils import make_llm, words_only
+from lang_agent.utils import make_llm, words_only, tree_leaves
 
 from langchain_core.messages import SystemMessage, HumanMessage, AIMessage, BaseMessage
 from langchain.agents import create_agent
@@ -269,7 +269,6 @@ def check_mcp_conn():
         logger.warning(f"MCP server at {mcp_url} check failed: {e}")
 
 def debug_tool_node():
-    import jax
     import httpx
     from langchain_core.messages.base import BaseMessageChunk
     from lang_agent.components.tool_manager import ToolManagerConfig
@@ -302,7 +301,7 @@ def debug_tool_node():
             
             print("Assistant: ", end="", flush=True)
             for chunk in graph.stream(*input_data, stream_mode="updates"):
-                el = jax.tree.leaves(chunk)[-1]
+                el = tree_leaves(chunk)[-1]
                 el.pretty_print()
     except Exception as e:
         print(e)