wehub-resource-sync
354 lines
15 KiB
Python
354 lines
15 KiB
Python
from functools import partial
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import logging
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import textwrap
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from typing import Dict, List, Tuple
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from gui_agents.s3.agents.grounding import ACI
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from gui_agents.s3.core.module import BaseModule
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from gui_agents.s3.memory.procedural_memory import PROCEDURAL_MEMORY
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from gui_agents.s3.utils.common_utils import (
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call_llm_safe,
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call_llm_formatted,
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parse_code_from_string,
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split_thinking_response,
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create_pyautogui_code,
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)
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from gui_agents.s3.utils.formatters import (
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SINGLE_ACTION_FORMATTER,
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CODE_VALID_FORMATTER,
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)
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logger = logging.getLogger("desktopenv.agent")
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class Worker(BaseModule):
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def __init__(
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self,
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worker_engine_params: Dict,
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grounding_agent: ACI,
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platform: str = "ubuntu",
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max_trajectory_length: int = 8,
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enable_reflection: bool = True,
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):
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"""
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Worker receives the main task and generates actions, without the need of hierarchical planning
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Args:
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worker_engine_params: Dict
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Parameters for the worker agent
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grounding_agent: Agent
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The grounding agent to use
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platform: str
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OS platform the agent runs on (darwin, linux, windows)
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max_trajectory_length: int
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The amount of images turns to keep
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enable_reflection: bool
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Whether to enable reflection
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"""
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super().__init__(worker_engine_params, platform)
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self.temperature = worker_engine_params.get("temperature", 0.0)
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self.use_thinking = worker_engine_params.get("model", "") in [
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"claude-opus-4-20250514",
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"claude-sonnet-4-20250514",
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"claude-3-7-sonnet-20250219",
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"claude-sonnet-4-5-20250929",
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"claude-opus-4-5-20251101",
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]
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self.grounding_agent = grounding_agent
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self.max_trajectory_length = max_trajectory_length
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self.enable_reflection = enable_reflection
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self.reset()
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def reset(self):
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if self.platform != "linux":
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skipped_actions = ["set_cell_values"]
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else:
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skipped_actions = []
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# Hide code agent action entirely if no env/controller is available
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if not getattr(self.grounding_agent, "env", None) or not getattr(
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getattr(self.grounding_agent, "env", None), "controller", None
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):
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skipped_actions.append("call_code_agent")
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sys_prompt = PROCEDURAL_MEMORY.construct_simple_worker_procedural_memory(
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type(self.grounding_agent), skipped_actions=skipped_actions
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).replace("CURRENT_OS", self.platform)
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self.generator_agent = self._create_agent(sys_prompt)
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self.reflection_agent = self._create_agent(
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PROCEDURAL_MEMORY.REFLECTION_ON_TRAJECTORY
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)
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self.turn_count = 0
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self.worker_history = []
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self.reflections = []
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self.cost_this_turn = 0
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self.screenshot_inputs = []
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def flush_messages(self):
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"""Flush messages based on the model's context limits.
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This method ensures that the agent's message history does not exceed the maximum trajectory length.
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Side Effects:
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- Modifies the messages of generator, reflection, and bon_judge agents to fit within the context limits.
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"""
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engine_type = self.engine_params.get("engine_type", "")
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# Flush strategy for long-context models: keep all text, only keep latest images
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if engine_type in ["anthropic", "openai", "gemini"]:
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max_images = self.max_trajectory_length
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for agent in [self.generator_agent, self.reflection_agent]:
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if agent is None:
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continue
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# keep latest k images
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img_count = 0
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for i in range(len(agent.messages) - 1, -1, -1):
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for j in range(len(agent.messages[i]["content"])):
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if "image" in agent.messages[i]["content"][j].get("type", ""):
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img_count += 1
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if img_count > max_images:
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del agent.messages[i]["content"][j]
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# Flush strategy for non-long-context models: drop full turns
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else:
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# generator msgs are alternating [user, assistant], so 2 per round
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if len(self.generator_agent.messages) > 2 * self.max_trajectory_length + 1:
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self.generator_agent.messages.pop(1)
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self.generator_agent.messages.pop(1)
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# reflector msgs are all [(user text, user image)], so 1 per round
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if len(self.reflection_agent.messages) > self.max_trajectory_length + 1:
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self.reflection_agent.messages.pop(1)
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def _generate_reflection(self, instruction: str, obs: Dict) -> Tuple[str, str]:
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"""
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Generate a reflection based on the current observation and instruction.
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Args:
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instruction (str): The task instruction.
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obs (Dict): The current observation containing the screenshot.
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Returns:
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Optional[str, str]: The generated reflection text and thoughts, if any (turn_count > 0).
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Side Effects:
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- Updates reflection agent's history
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- Generates reflection response with API call
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"""
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reflection = None
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reflection_thoughts = None
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if self.enable_reflection:
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# Load the initial message
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if self.turn_count == 0:
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text_content = textwrap.dedent(f"""
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Task Description: {instruction}
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Current Trajectory below:
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""")
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updated_sys_prompt = (
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self.reflection_agent.system_prompt + "\n" + text_content
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)
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self.reflection_agent.add_system_prompt(updated_sys_prompt)
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self.reflection_agent.add_message(
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text_content="The initial screen is provided. No action has been taken yet.",
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image_content=obs["screenshot"],
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role="user",
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)
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# Load the latest action
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else:
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self.reflection_agent.add_message(
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text_content=self.worker_history[-1],
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image_content=obs["screenshot"],
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role="user",
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)
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full_reflection = call_llm_safe(
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self.reflection_agent,
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temperature=self.temperature,
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use_thinking=self.use_thinking,
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)
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reflection, reflection_thoughts = split_thinking_response(
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full_reflection
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)
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self.reflections.append(reflection)
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logger.info("REFLECTION THOUGHTS: %s", reflection_thoughts)
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logger.info("REFLECTION: %s", reflection)
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return reflection, reflection_thoughts
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def generate_next_action(self, instruction: str, obs: Dict) -> Tuple[Dict, List]:
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"""
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Predict the next action(s) based on the current observation.
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"""
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self.grounding_agent.assign_screenshot(obs)
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self.grounding_agent.set_task_instruction(instruction)
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generator_message = (
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""
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if self.turn_count > 0
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else "The initial screen is provided. No action has been taken yet."
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)
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# Load the task into the system prompt
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if self.turn_count == 0:
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prompt_with_instructions = self.generator_agent.system_prompt.replace(
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"TASK_DESCRIPTION", instruction
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)
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self.generator_agent.add_system_prompt(prompt_with_instructions)
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# Get the per-step reflection
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reflection, reflection_thoughts = self._generate_reflection(instruction, obs)
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if reflection:
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generator_message += f"REFLECTION: You may use this reflection on the previous action and overall trajectory:\n{reflection}\n"
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# Get the grounding agent's knowledge base buffer
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generator_message += (
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f"\nCurrent Text Buffer = [{','.join(self.grounding_agent.notes)}]\n"
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)
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# Add code agent result from previous step if available (from full task or subtask execution)
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if (
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hasattr(self.grounding_agent, "last_code_agent_result")
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and self.grounding_agent.last_code_agent_result is not None
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):
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code_result = self.grounding_agent.last_code_agent_result
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generator_message += f"\nCODE AGENT RESULT:\n"
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generator_message += (
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f"Task/Subtask Instruction: {code_result['task_instruction']}\n"
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)
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generator_message += f"Steps Completed: {code_result['steps_executed']}\n"
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generator_message += f"Max Steps: {code_result['budget']}\n"
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generator_message += (
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f"Completion Reason: {code_result['completion_reason']}\n"
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)
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generator_message += f"Summary: {code_result['summary']}\n"
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if code_result["execution_history"]:
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generator_message += f"Execution History:\n"
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for i, step in enumerate(code_result["execution_history"]):
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action = step["action"]
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# Format code snippets with proper backticks
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if "```python" in action:
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# Extract Python code and format it
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code_start = action.find("```python") + 9
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code_end = action.find("```", code_start)
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if code_end != -1:
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python_code = action[code_start:code_end].strip()
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generator_message += (
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f"Step {i+1}: \n```python\n{python_code}\n```\n"
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)
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else:
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generator_message += f"Step {i+1}: \n{action}\n"
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elif "```bash" in action:
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# Extract Bash code and format it
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code_start = action.find("```bash") + 7
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code_end = action.find("```", code_start)
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if code_end != -1:
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bash_code = action[code_start:code_end].strip()
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generator_message += (
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f"Step {i+1}: \n```bash\n{bash_code}\n```\n"
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)
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else:
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generator_message += f"Step {i+1}: \n{action}\n"
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else:
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generator_message += f"Step {i+1}: \n{action}\n"
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generator_message += "\n"
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# Log the code agent result section for debugging (truncated execution history)
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log_message = f"\nCODE AGENT RESULT:\n"
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log_message += (
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f"Task/Subtask Instruction: {code_result['task_instruction']}\n"
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)
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log_message += f"Steps Completed: {code_result['steps_executed']}\n"
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log_message += f"Max Steps: {code_result['budget']}\n"
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log_message += f"Completion Reason: {code_result['completion_reason']}\n"
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log_message += f"Summary: {code_result['summary']}\n"
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if code_result["execution_history"]:
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log_message += f"Execution History (truncated):\n"
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# Only log first 3 steps and last 2 steps to keep logs manageable
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total_steps = len(code_result["execution_history"])
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for i, step in enumerate(code_result["execution_history"]):
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if i < 3 or i >= total_steps - 2: # First 3 and last 2 steps
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action = step["action"]
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if "```python" in action:
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code_start = action.find("```python") + 9
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code_end = action.find("```", code_start)
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if code_end != -1:
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python_code = action[code_start:code_end].strip()
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log_message += (
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f"Step {i+1}: ```python\n{python_code}\n```\n"
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)
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else:
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log_message += f"Step {i+1}: {action}\n"
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elif "```bash" in action:
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code_start = action.find("```bash") + 7
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code_end = action.find("```", code_start)
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if code_end != -1:
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bash_code = action[code_start:code_end].strip()
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log_message += (
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f"Step {i+1}: ```bash\n{bash_code}\n```\n"
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)
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else:
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log_message += f"Step {i+1}: {action}\n"
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else:
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log_message += f"Step {i+1}: {action}\n"
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elif i == 3 and total_steps > 5:
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log_message += f"... (truncated {total_steps - 5} steps) ...\n"
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logger.info(
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f"WORKER_CODE_AGENT_RESULT_SECTION - Step {self.turn_count + 1}: Code agent result added to generator message:\n{log_message}"
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)
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# Reset the code agent result after adding it to context
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self.grounding_agent.last_code_agent_result = None
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# Finalize the generator message
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self.generator_agent.add_message(
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generator_message, image_content=obs["screenshot"], role="user"
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)
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# Generate the plan and next action
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format_checkers = [
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SINGLE_ACTION_FORMATTER,
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partial(CODE_VALID_FORMATTER, self.grounding_agent, obs),
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]
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plan = call_llm_formatted(
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self.generator_agent,
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format_checkers,
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temperature=self.temperature,
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use_thinking=self.use_thinking,
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)
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self.worker_history.append(plan)
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self.generator_agent.add_message(plan, role="assistant")
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logger.info("PLAN:\n %s", plan)
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# Extract the next action from the plan
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plan_code = parse_code_from_string(plan)
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try:
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assert plan_code, "Plan code should not be empty"
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exec_code = create_pyautogui_code(self.grounding_agent, plan_code, obs)
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except Exception as e:
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logger.error(
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f"Could not evaluate the following plan code:\n{plan_code}\nError: {e}"
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)
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exec_code = self.grounding_agent.wait(
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1.333
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) # Skip a turn if the code cannot be evaluated
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executor_info = {
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"plan": plan,
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"plan_code": plan_code,
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"exec_code": exec_code,
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"reflection": reflection,
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"reflection_thoughts": reflection_thoughts,
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"code_agent_output": (
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self.grounding_agent.last_code_agent_result
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if hasattr(self.grounding_agent, "last_code_agent_result")
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and self.grounding_agent.last_code_agent_result is not None
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else None
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),
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}
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self.turn_count += 1
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self.screenshot_inputs.append(obs["screenshot"])
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self.flush_messages()
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return executor_info, [exec_code]
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