Fix issue #5015: [Bug]: Headless mode awaits for requested user feedb…

openhands/controller/agent_controller.py

@@ -68,6 +68,7 @@ class AgentController:
     delegate: 'AgentController | None' = None
     _pending_action: Action | None = None
     _closed: bool = False
+    fake_user_response_fn: Callable[[str], str] | None = None
     filter_out: ClassVar[tuple[type[Event], ...]] = (
         NullAction,
         NullObservation,
@@ -89,6 +90,7 @@ def __init__(
         is_delegate: bool = False,
         headless_mode: bool = True,
         status_callback: Callable | None = None,
+        fake_user_response_fn: Callable[[str], str] | None = None,
     ):
         """Initializes a new instance of the AgentController class.
 
@@ -106,13 +108,21 @@ def __init__(
             initial_state: The initial state of the controller.
             is_delegate: Whether this controller is a delegate.
             headless_mode: Whether the agent is run in headless mode.
+            fake_user_response_fn: Function to generate fake user responses in headless mode.
+                If not provided and headless_mode is True, a default function will be used.
             status_callback: Optional callback function to handle status updates.
         """
         self._step_lock = asyncio.Lock()
         self.id = sid
         self.agent = agent
         self.headless_mode = headless_mode
 
+        # Set up default fake user response function for headless mode
+        if headless_mode and fake_user_response_fn is None:
+            self.fake_user_response_fn = lambda _: 'continue'
+        else:
+            self.fake_user_response_fn = fake_user_response_fn
+
         # subscribe to the event stream
         self.event_stream = event_stream
         self.event_stream.subscribe(
@@ -313,7 +323,25 @@ async def _handle_message_action(self, action: MessageAction) -> None:
             if self.get_agent_state() != AgentState.RUNNING:
                 await self.set_agent_state_to(AgentState.RUNNING)
         elif action.source == EventSource.AGENT and action.wait_for_response:
-            await self.set_agent_state_to(AgentState.AWAITING_USER_INPUT)
+            if self.headless_mode:
+                # In headless mode, we should use a fake user response if provided
+                if self.fake_user_response_fn is not None:
+                    response = self.fake_user_response_fn(action.content)
+                    self.event_stream.add_event(
+                        MessageAction(content=response),
+                        EventSource.USER,
+                    )
+                else:
+                    # If no fake response function is provided, we continue with an empty response
+                    self.event_stream.add_event(
+                        MessageAction(content=''),
+                        EventSource.USER,
+                    )
+            else:
+                # Display the message content to help user understand what input is expected
+                print(f'\nAgent is requesting input: {action.content}')
+                print('Request user input >> ', end='', flush=True)
+                await self.set_agent_state_to(AgentState.AWAITING_USER_INPUT)
 
     def reset_task(self) -> None:
         """Resets the agent's task."""

tests/unit/test_agent_controller.py

@@ -355,3 +355,71 @@ async def test_step_max_budget_headless(mock_agent, mock_event_stream):
     # In headless mode, throttling results in an error
     assert controller.state.agent_state == AgentState.ERROR
     await controller.close()
+
+
+@pytest.mark.asyncio
+async def test_message_action_user_input_headless(mock_agent, mock_event_stream):
+    # Test with default fake response
+    controller = AgentController(
+        agent=mock_agent,
+        event_stream=mock_event_stream,
+        max_iterations=10,
+        sid='test',
+        confirmation_mode=False,
+        headless_mode=True,
+    )
+    controller.state.agent_state = AgentState.RUNNING
+    message_action = MessageAction(content='Test message', wait_for_response=True)
+    message_action._source = EventSource.AGENT
+    await controller.on_event(message_action)
+    # In headless mode with default fake response, should continue running
+    assert controller.state.agent_state == AgentState.RUNNING
+    mock_event_stream.add_event.assert_called_once()
+    args = mock_event_stream.add_event.call_args[0]
+    assert isinstance(args[0], MessageAction)
+    assert args[0].content == 'continue'
+    await controller.close()
+
+    # Test with custom fake response
+    mock_event_stream.reset_mock()
+    custom_response = 'custom response'
+    controller = AgentController(
+        agent=mock_agent,
+        event_stream=mock_event_stream,
+        max_iterations=10,
+        sid='test',
+        confirmation_mode=False,
+        headless_mode=True,
+        fake_user_response_fn=lambda _: custom_response,
+    )
+    controller.state.agent_state = AgentState.RUNNING
+    message_action = MessageAction(content='Test message', wait_for_response=True)
+    message_action._source = EventSource.AGENT
+    await controller.on_event(message_action)
+    # In headless mode with custom fake response, should continue running
+    assert controller.state.agent_state == AgentState.RUNNING
+    mock_event_stream.add_event.assert_called_once()
+    args = mock_event_stream.add_event.call_args[0]
+    assert isinstance(args[0], MessageAction)
+    assert args[0].content == custom_response
+    await controller.close()
+
+
+@pytest.mark.asyncio
+async def test_message_action_user_input_non_headless(mock_agent, mock_event_stream):
+    controller = AgentController(
+        agent=mock_agent,
+        event_stream=mock_event_stream,
+        max_iterations=10,
+        sid='test',
+        confirmation_mode=False,
+        headless_mode=False,
+    )
+    controller.state.agent_state = AgentState.RUNNING
+    message_action = MessageAction(content='Test message', wait_for_response=True)
+    message_action._source = EventSource.AGENT
+    await controller.on_event(message_action)
+    # In non-headless mode, should wait for user input
+    assert controller.state.agent_state == AgentState.AWAITING_USER_INPUT
+    mock_event_stream.add_event.assert_not_called()
+    await controller.close()