debug: check result keys in main.py

main.py

@@ -1139,6 +1139,7 @@ def main():
                 result = agent.invoke({"messages": [HumanMessage(content=user_input)]})
                 
                 # Extract the AI's response (works for both simple and tool agent)
+                print(f"MAIN: result keys={result.keys()}")
                 if "response" in result:
                     # OllamaToolAgent returns a separate response field
                     response_text = result["response"]
@@ -1146,6 +1147,7 @@ def main():
                     # Simple agent returns the last message
                     ai_message = result["messages"][-1]
                     response_text = ai_message.content if hasattr(ai_message, 'content') else str(ai_message)
+                print(f"MAIN: response_text={response_text[:100] if response_text else 'EMPTY'}...")
                 
                 print(f"\n🤖 LangCode: {response_text}")
             except Exception as e: