about to call 3d endpoint from here

app.log

@@ -53300,3 +53300,39 @@ Traceback (most recent call last):
     raise InvalidUpdateError(msg)
 langgraph.errors.InvalidUpdateError: At key 'next_stage': Can receive only one value per step. Use an Annotated key to handle multiple values.
 For troubleshooting, visit: https://python.langchain.com/docs/troubleshooting/errors/INVALID_CONCURRENT_GRAPH_UPDATE
+2025-06-09 17:24:49:__main__:INFO: Starting the interface
+2025-06-09 17:25:10:__main__:INFO: Greeting added for new user via handle_initial_greeting_load.
+2025-06-09 17:25:19:__main__:INFO: Prompt: You are a helpful assistant.
+2025-06-09 17:25:32:__main__:INFO: Prompt: You are a helpful assistant.
+2025-06-09 17:25:43:__main__:INFO: Prompt: You are a helpful assistant.
+2025-06-09 17:25:51:__main__:INFO: Prompt: You are a helpful assistant.
+2025-06-09 17:25:53:__main__:ERROR: Exception occurred
+Traceback (most recent call last):
+  File "C:\myworkspace\huggingface_agents\DIY_agent\dev\DIY_assistant\app.py", line 99, in chat_fn
+    async for stream_mode, chunk in graph.astream(
+    ...<56 lines>...
+                    yield output, gr.skip(), gr.skip()
+  File "C:\myworkspace\huggingface_agents\mcp-hackthon\dev\DIY_assistant\env\Lib\site-packages\langgraph\pregel\__init__.py", line 2652, in astream
+    while loop.tick(input_keys=self.input_channels):
+          ~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+  File "C:\myworkspace\huggingface_agents\mcp-hackthon\dev\DIY_assistant\env\Lib\site-packages\langgraph\pregel\loop.py", line 493, in tick
+    mv_writes, updated_channels = apply_writes(
+                                  ~~~~~~~~~~~~^
+        self.checkpoint,
+        ^^^^^^^^^^^^^^^^
+    ...<3 lines>...
+        self.trigger_to_nodes,
+        ^^^^^^^^^^^^^^^^^^^^^^
+    )
+    ^
+  File "C:\myworkspace\huggingface_agents\mcp-hackthon\dev\DIY_assistant\env\Lib\site-packages\langgraph\pregel\algo.py", line 305, in apply_writes
+    if channels[chan].update(vals) and get_next_version is not None:
+       ~~~~~~~~~~~~~~~~~~~~~^^^^^^
+  File "C:\myworkspace\huggingface_agents\mcp-hackthon\dev\DIY_assistant\env\Lib\site-packages\langgraph\channels\last_value.py", line 58, in update
+    raise InvalidUpdateError(msg)
+langgraph.errors.InvalidUpdateError: At key 'next_stage': Can receive only one value per step. Use an Annotated key to handle multiple values.
+For troubleshooting, visit: https://python.langchain.com/docs/troubleshooting/errors/INVALID_CONCURRENT_GRAPH_UPDATE
+2025-06-09 17:26:38:__main__:INFO: Greeting added for new user via handle_initial_greeting_load.
+2025-06-09 17:26:45:__main__:INFO: Greeting added for new user via handle_initial_greeting_load.
+2025-06-09 17:27:38:__main__:INFO: Greeting added for new user via handle_initial_greeting_load.
+2025-06-09 17:28:06:__main__:INFO: Starting the interface

graph.py

@@ -276,7 +276,8 @@ def guidance_routing(state: GraphProcessingState) -> str:
         return "brainstorming_node"
 
     elif next_stage == "planning":
-        return "prompt_planning_node"
+        return "generate_3d_node"
+        # return "prompt_planning_node"
     elif next_stage == "drawing":
         return "generate_3d_node"
     elif next_stage == "product_searching":
@@ -741,7 +742,7 @@ ACCURATE PROMPT FOR MODEL GENERATING: [Your final single-paragraph prompt here]
         }
 
 async def generate_3d_node(state: GraphProcessingState, config=None):
-    print("\n--- generate_3d Node (Debug) ---\n")
+    print("\n-😶‍🌫️😶‍🌫️😶‍🌫️😶‍🌫️-- generate_3d Node (Debug) ---😶‍🌫️😶‍🌫️😶‍🌫️😶‍🌫️\n")
 
     # Ensure OpenAI model is available
     if not model: