Update llm/aggregator.py

llm/aggregator.py

@@ -2,6 +2,9 @@ def aggregate_responses(responses: list) -> str:
     if not responses:
         return "No responses received."
 
-    combined = "\n".join(responses)
-    # In real use, you’d prompt another LLM to summarize/combine them
-    return f"Final synthesized response based on multiple agents:\n{combined}"
+    # Sanitize: only join valid strings
+    safe_responses = [r if isinstance(r, str) else str(r) for r in responses]
+
+    combined = "\n".join(safe_responses)
+
+    return f"Final synthesized response based on multiple agents:\n{combined}"