Update prompts.yaml

prompts.yaml

@@ -51,7 +51,10 @@ managed_agent:
 final_answer:
   pre_messages: |-
     You have reached the end of your reasoning steps.
-    Before providing your final answer, review what you have done, ensure all requirements have been met, and summarize concisely.
+    Before providing your final answer, summarize the reasoning process briefly.
   default: |-
     Provide the conclusive, human-readable answer to the task.
     Be concise, clear, and correct.
+  post_messages: |-
+    Confirm that you have successfully returned your final answer.
+    Do not add further reasoning or code after this point.