Adding in GEPA agents

experiments/code/gepa/__init__.py

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+# ruff: noqa: F401
+from appworld_experiments.code.gepa.gepa_agent import GEPAAgent
+from appworld_experiments.code.gepa.gepa_react import GEPAReActAgent

experiments/code/gepa/gepa_agent.py

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+from appworld import AppWorld
+from appworld.common.constants import DEFAULT_EXPERIMENT_NAME
+from appworld_experiments.code.ace.evaluation_agent import Agent, ExecutionIO
+
+from appworld.evaluator import evaluate_task
+
+class GEPAAgent(Agent):
+    def __init__(
+        self,
+        generator_model_config: dict,
+        appworld_config: dict | None = None,
+        logger_config: dict | None = None,
+        max_steps: int = 10,
+        max_cost_overall: float = 3000,
+        max_cost_per_task: float = 10,
+        log_lm_calls: bool = False,
+    ):
+        super().__init__(
+            generator_model_config=generator_model_config,
+            appworld_config=appworld_config,
+            logger_config=logger_config,
+            max_steps=max_steps,
+            max_cost_overall=max_cost_overall,
+            max_cost_per_task=max_cost_per_task,
+            log_lm_calls=log_lm_calls
+        )
+
+    def solve_task(self, task_id: str, experiment_name: str | None = None):
+        experiment_name = experiment_name or DEFAULT_EXPERIMENT_NAME
+        self.cost_tracker.reset(task_id)
+
+        self.initial_code_idx = None
+        self.previous_code_idx = None
+        self.previous_error_idx = None
+        reflections = []
+        test_tracker = None
+
+        with AppWorld(
+            task_id=task_id, experiment_name=experiment_name, **self.appworld_config
+        ) as world:
+            execution_outputs: list[ExecutionIO] = []
+            self.initialize(world)
+
+            print("---Max steps---: ", self.max_steps)
+            for _ in range(self.max_steps):
+                self.step_number += 1
+                execution_inputs, cost, reflection = self.next_execution_inputs_and_cost(execution_outputs, "")
+                if reflection:
+                    reflections.append(reflection)
+
+                if len(execution_inputs) != 0:
+                    execution_outputs = [
+                        ExecutionIO(
+                            content=world.execute(execution_input.content),
+                            metadata=execution_input.metadata,
+                        )
+                        for execution_input in execution_inputs
+                    ]
+
+                    # Show execution results to user via logger
+                    for i, output in enumerate(execution_outputs):
+                        if output.content.strip():  # only show non-empty outputs
+                            self.logger.show_message(
+                                role="environment", 
+                                message=output.content, 
+                                step_number=self.step_number
+                            )
+
+                    self.cost_tracker.add(task_id, cost)
+                    self.log_cost()
+
+                if world.task_completed() or self.cost_tracker.exceeded():
+                    test_tracker, _ = evaluate_task(task_id, experiment_name)
+                    break
+
+            if test_tracker is None:
+                test_tracker = [execution_output.content for execution_output in execution_outputs]
+
+        self.logger.complete_task()
+        return test_tracker

experiments/code/gepa/gepa_react.py

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+import copy
+import json
+import os
+import re
+from typing import Any
+
+from jinja2 import Template
+
+from appworld import AppWorld
+from appworld.common.utils import read_file
+from appworld_experiments.code.ace.evaluation_agent import Agent, ExecutionIO
+from appworld_experiments.code.gepa.gepa_agent import GEPAAgent
+
+@GEPAAgent.register("gepa_react")
+class GEPAReActAgent(GEPAAgent):
+    def __init__(
+        self,
+        generator_prompt_file_path: str | None = None,
+        trained_playbook_file_path: str | None = None,
+        ignore_multiple_calls: bool = True,
+        max_prompt_length: int | None = None,
+        max_output_length: int = 400000,
+        **kwargs: Any,
+    ):
+        super().__init__(**kwargs)
+        self.generator_prompt_template = read_file(generator_prompt_file_path.replace("/", os.sep)).lstrip()
+        self.trained_playbook_file_path = trained_playbook_file_path
+        self.max_prompt_length = max_prompt_length
+        self.max_output_length = max_output_length
+        self.ignore_multiple_calls = ignore_multiple_calls
+        self.partial_code_regex = r".*```python\n(.*)"
+        self.full_code_regex = r"```python\n(.*?)```"
+
+        self.playbook = None
+        self.gepa_prompt_replace = None
+
+    def initialize(self, world: AppWorld):
+        super().initialize(world)
+        template = Template(self.generator_prompt_template)
+        app_descriptions = json.dumps(
+            [{"name": k, "description": v} for (k, v) in world.task.app_descriptions.items()],
+            indent=1,
+        )
+        template_params = {
+            "input_str": world.task.instruction,
+            "main_user": world.task.supervisor,
+            "app_descriptions": app_descriptions,
+            "relevant_apis": str(world.task.ground_truth.required_apis),
+            "playbook": self.playbook,
+        }
+        output_str = template.render(template_params)
+        output_str = self.truncate_input(output_str) + "\n\n"
+        self.messages = self.text_to_messages(output_str)
+        self.num_instruction_messages = len(self.messages)
+        assert self.gepa_prompt_replace is not None
+        self.messages[0]['content'] = self.gepa_prompt_replace + self.messages[0]['content']
+
+    def next_execution_inputs_and_cost(
+        self, last_execution_outputs: list[ExecutionIO], world_gt_code: str = None
+    ) -> tuple[ExecutionIO, float, str | None]:
+        if last_execution_outputs:
+            assert (
+                len(last_execution_outputs) == 1
+            ), "React expects exactly one last_execution_output."
+            last_execution_output_content = last_execution_outputs[0].content
+            potential_new_line = ""
+            last_execution_output_content = (
+                "Output:\n```\n" + self.truncate_output(last_execution_output_content) + potential_new_line + "```\n\n"
+            )
+            self.messages.append({"role": "user", "content": last_execution_output_content})
+        messages = self.trimmed_messages
+        output = self.language_model.generate(messages=messages)
+        code, fixed_output_content = self.extract_code_and_fix_content(output["content"])
+        self.messages.append({"role": "assistant", "content": fixed_output_content + "\n\n"})
+        self.logger.show_message(
+            role="agent", message=fixed_output_content, step_number=self.step_number
+        )
+        return [ExecutionIO(content=code)], output["cost"], None
+
+    def extract_code_and_fix_content(self, text: str) -> tuple[str, str]:
+        if text is None:
+            return "", ""
+        original_text = text
+        output_code = ""
+        match_end = 0
+        # Handle multiple calls
+        for re_match in re.finditer(self.full_code_regex, original_text, flags=re.DOTALL):
+            code = re_match.group(1).strip()
+            if self.ignore_multiple_calls:
+                text = original_text[: re_match.end()]
+                return code, text
+            output_code += code + "\n"
+            match_end = re_match.end()
+        # Check for partial code match at end (no terminating ```)  following the last match
+        partial_match = re.match(
+            self.partial_code_regex, original_text[match_end:], flags=re.DOTALL
+        )
+        if partial_match:
+            output_code += partial_match.group(1).strip()
+            # Terminated due to stop condition; add stop condition to output
+            if not text.endswith("\n"):
+                text = text + "\n"
+            text = text + "```"
+        if len(output_code) == 0:
+            return "", text
+        else:
+            return output_code, text
+
+    def truncate_input(self, input_str: str) -> str:
+        if self.max_prompt_length is None:
+            return input_str
+        max_prompt_length = self.max_prompt_length
+        goal_index = input_str.rfind("Task:")
+        if goal_index == -1:
+            raise ValueError(f"No goal found in input string:\n{input_str}")
+        next_new_line_index = input_str.find("\n", goal_index) + 1
+        init_prompt = input_str[:next_new_line_index]
+        prompt = input_str[next_new_line_index:]
+        if len(init_prompt) > max_prompt_length:
+            raise ValueError("Input prompt longer than max allowed length")
+        if len(prompt) > max_prompt_length - len(init_prompt):
+            new_prompt = prompt[-(max_prompt_length - len(init_prompt)) :]
+            cmd_index = new_prompt.find("ASSISTANT:") if "ASSISTANT:" in new_prompt else 0
+            prompt = "\n[TRIMMED HISTORY]\n\n" + new_prompt[cmd_index:]
+        return init_prompt + prompt
+
+    def truncate_output(self, execution_output_content: str) -> str:
+        if len(execution_output_content) > 20000:
+            execution_output_content = execution_output_content[:20000] + "\n[REST NOT SHOWN FOR BREVITY]"
+        return execution_output_content
+
+    def text_to_messages(self, input_str: str) -> list[dict]:
+        messages_json = []
+        last_start = 0
+        for m in re.finditer("(USER|ASSISTANT|SYSTEM):\n", input_str, flags=re.IGNORECASE):
+            last_end = m.span()[0]
+            if len(messages_json) == 0:
+                if last_end != 0:
+                    raise ValueError(
+                        f"Start of the prompt has no assigned role: {input_str[:last_end]}"
+                    )
+            else:
+                messages_json[-1]["content"] = input_str[last_start:last_end]
+            role = m.group(1).lower()
+            messages_json.append({"role": role, "content": None})
+            last_start = m.span()[1]
+        messages_json[-1]["content"] = input_str[last_start:]
+        return messages_json
+
+    def messages_to_text(self, messages: list[dict]) -> str:
+        output_str = ""
+        for message in messages:
+            role = message["role"]
+            if role == "system":
+                output_str += "SYSTEM:\n" + message["content"]
+            if role == "assistant":
+                output_str += "ASSISTANT:\n" + message["content"]
+            elif role == "user":
+                output_str += "USER:\n" + message["content"]
+            else:
+                raise ValueError(f"Unknown message role {role} in: {message}")
+        return output_str
+
+    @property
+    def trimmed_messages(self) -> list[dict]:
+        messages = copy.deepcopy(self.messages)
+        pre_messages = messages[: self.num_instruction_messages - 1]
+        post_messages = messages[self.num_instruction_messages - 1 :]
+        output_str = self.messages_to_text(post_messages)
+        remove_prefix = output_str[: output_str.index("Task: ") + 6]
+        output_str = output_str.removeprefix(
+            remove_prefix
+        )  # not needed, it's only to match the original code
+        observation_index = 0
+        while len(output_str) > self.max_output_length:
+            found_block = False
+            # Dont remove observations from the last 5 blocks
+            if observation_index < len(post_messages) - 5:
+                # Find the next observation block to remove
+                for message_index, message in enumerate(post_messages[observation_index:]):
+                    # Only keep the code blocks and remove observations
+                    if message["role"] == "user" and message["content"].startswith("Output:"):
+                        message["content"] = "Output:\n```\n[NOT SHOWN FOR BREVITY]```\n\n"
+                        found_block = True
+                        observation_index += message_index + 1
+                        break
+                if not found_block:
+                    observation_index = len(post_messages)
+            # If no observation block left to trim, we need to start removing complete history blocks
+            if not found_block and len(post_messages):
+                first_post_message = copy.deepcopy(post_messages[0])
+                if not first_post_message["content"].endswith("[TRIMMED HISTORY]\n\n"):
+                    first_post_message["content"] += "[TRIMMED HISTORY]\n\n"
+                post_messages = [first_post_message] + post_messages[2:]
+                found_block = True
+            if not found_block:
+                raise ValueError(f"No blocks found to be removed!\n{post_messages}")
+            output_str = self.messages_to_text(
+                post_messages
+            )  # not needed, it's only to match the original code
+            output_str = output_str.removeprefix(remove_prefix)
+        messages = pre_messages + post_messages
+        return messages

experiments/configs/GEPA_offline_with_GT_adaptation.jsonnet

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+local project_home_path = std.extVar("APPWORLD_PROJECT_PATH");
+local experiment_prompts_path = project_home_path + "/experiments/prompts";
+local experiment_playbooks_path = project_home_path + "/experiments/playbooks";
+local experiment_configs_path = project_home_path + "/experiments/configs";
+local experiment_code_path = project_home_path + "/experiments/code";
+
+local generator_model_config = {
+    "name": "DeepSeek-V3.1",
+    "provider": "sambanova",
+    "temperature": 0,
+    "seed": 100,
+    "stop": ["<|endoftext|>", "<|eot_id|>", "<|start_header_id|>"],
+    "logprobs": false,
+    "top_logprobs": null,
+    "frequency_penalty": 0,
+    "presence_penalty": 0,
+    "n": 1,
+    "response_format": {"type": "text"},
+    "retry_after_n_seconds": 10,
+    "use_cache": true,
+    "max_retries": 50,
+};
+
+{
+    "type": "gepa",
+    "config": {
+        "agent": {
+            "type": "gepa_react",
+            "generator_model_config": generator_model_config,
+            "appworld_config": {
+                "random_seed": 123,
+            },
+            "logger_config": {
+                "color": true,
+                "verbose": true,
+            },
+            "generator_prompt_file_path": experiment_prompts_path + "/appworld_react_gepa_prompt.txt",
+            "ignore_multiple_calls": true,
+            "max_steps": 40,
+            "max_cost_overall": 1000,
+            "max_cost_per_task": 10,
+            "log_lm_calls": true,
+        }
+    }
+}