added to prompt template

app.py

@@ -57,7 +57,8 @@ prompt_templates["final_answer"] = {
     "pre_messages": [
         {"role": "system", "content": "You are a helpful assistant. Return the final answer clearly."}
     ],
-    "format": "{output}"
+    "format": "{output}",
+    "post_messages": []
 }
 agent = CodeAgent(
     model=model,