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Co-authored-by: greptile-apps[bot] <165735046+greptile-apps[bot]@users.noreply.github.com>

Author: eric-tramel

packages/data-designer-engine/src/data_designer/engine/models/facade.py

@@ -484,7 +484,7 @@ async def agenerate(
 
                 continue
 
-            response = completion_response.choices[0].message.content or ""
+            response = (completion_response.choices[0].message.content or "").strip()
             reasoning_trace = getattr(completion_response.choices[0].message, "reasoning_content", None)
             messages.append(ChatMessage.as_assistant(content=response, reasoning_content=reasoning_trace or None))
             curr_num_correction_steps += 1