Switch to sync entrypoint + callback delivery: eliminates AgentCore retry duplicates

agentclaw/app/agent_claw_main/main.py

@@ -185,7 +185,7 @@ _current_actor_id: str = ''
 
 
 @app.entrypoint
-async def main(payload: dict, context):
+def main(payload: dict, context):
     """Handle an invocation from agent-runner Lambda (streaming)."""
     global _current_actor_id
 
@@ -290,16 +290,34 @@ async def main(payload: dict, context):
         tools=base_tools + list(workspace_tools),
     )
 
-    final_message = None
+    # Use callback handler to stream tokens directly to Telegram.
+    # This avoids AgentCore's async-generator retry path (which causes duplicates).
+    token_buffer = []
+
+    def _on_event(event: dict) -> None:
+        """Strands callback: accumulate text tokens and flush to Telegram at para breaks."""
+        delta = event.get('event', {}).get('contentBlockDelta', {}).get('delta', {})
+        token = delta.get('text', '') if isinstance(delta, dict) else ''
+        if not token:
+            return
+        token_buffer.append(token)
+        buf = ''.join(token_buffer)
+        if buf.rstrip().endswith(('\n\n', '.\n', '!\n', '?\n')) or len(buf) > 800:
+            stripped = buf.strip()
+            if stripped:
+                adapter.send(stripped)
+                token_buffer.clear()
+
     try:
-        async for event in agent.stream_async(payload.get('prompt', '')):
-            if 'result' in event:
-                final_message = event['result'].message
-            yield event
+        result = agent(payload.get('prompt', ''), callback_handler=_on_event)
+        # Flush remaining tokens
+        remaining = ''.join(token_buffer).strip()
+        if remaining:
+            adapter.send(remaining)
     finally:
         _typing_active = False
         session_manager.close()
-        # Delivery handled by agent-runner streaming consumer — no direct send here
 
+    return {'result': result.message}
 
 app.run()