Update app.py

app.py

@@ -137,20 +137,23 @@ def create_agent():
         logger.error(f"Failed to create agent: {str(e)}")
         raise
 
-def respond(msg, chat_history, temperature, max_new_tokens, max_tokens, multi_agent, conversation, max_round):
-    if not msg or len(msg.strip()) <= 10:
-        return chat_history + [["assistant", "Please provide a valid message with a string longer than 10 characters."]]
+def respond(message_input, chat_history, temperature, max_new_tokens, max_tokens, multi_agent, conversation, max_round):
+    # Ensure the message is a proper string
+    message = message_input.strip() if isinstance(message_input, str) else ""
+    
+    if len(message) <= 10:
+        return chat_history + [["assistant", "Hi, I am TxAgent, an assistant for answering biomedical questions. Please provide a valid message with a string longer than 10 characters."]]
 
-    # Append user message in tuple format
-    chat_history = chat_history + [["user", msg]]
+    # Add user message to history
+    chat_history = chat_history + [["user", message]]
 
     print("\n==== DEBUG ====")
-    print("User Message:", msg)
+    print("User Message:", message)
     print("Chat History:", chat_history)
     print("================\n")
 
     try:
-        # Convert to TxAgent format
+        # Format for model: list of (role, message) tuples
         formatted_history = [(role, content) for role, content in chat_history]
 
         response_generator = agent.run_gradio_chat(