hermes-agent/atropos/backends/modal_backend.py
2026-02-04 15:20:37 +10:00

73 lines
2.4 KiB
Python

"""
Modal tool backend (stub).
We intentionally ship a placeholder implementation so AgentEnv can expose a
backend switch without forcing Modal as a hard dependency for Hermes-Agent.
When org access is available, this backend will be implemented by running a
long-lived Modal worker (or pool) that owns N slots and exposes `execute_batch`.
"""
from __future__ import annotations
from dataclasses import dataclass
from typing import Any, Dict, List, Optional, Tuple
from ..slots.executor import ExecutionResult
from ..slots.slot import Slot
from .base import ToolBackend
@dataclass(frozen=True)
class ModalBackendConfig:
# Placeholders for future implementation.
app_name: str = "atropos-sandbox"
function_name: str = "sandbox_server"
volume_name: Optional[str] = None
volume_mount_path: str = "/data"
@classmethod
def from_agent_env_config(cls, cfg: Any) -> "ModalBackendConfig":
return cls(
app_name=str(getattr(cfg, "modal_app_name", cls.app_name)),
function_name=str(getattr(cfg, "modal_function_name", cls.function_name)),
volume_name=(getattr(cfg, "modal_volume_name", None) or None),
volume_mount_path=str(getattr(cfg, "modal_volume_mount_path", cls.volume_mount_path)),
)
class ModalToolBackend(ToolBackend):
def __init__(self, config: ModalBackendConfig):
self.config = config
@property
def default_timeout_s(self) -> Optional[float]:
return None
def _unavailable(self) -> RuntimeError:
return RuntimeError(
"Modal tool backend is not implemented yet. "
"Keep `--env.tool_pool_mode nomad` for now."
)
async def start(self) -> None:
raise self._unavailable()
async def stop(self, *, purge: bool = False) -> None: # noqa: ARG002
# If start() isn't implemented, stop() is also unavailable.
raise self._unavailable()
async def acquire(self, trajectory_id: Optional[str] = None) -> Slot: # noqa: ARG002
raise self._unavailable()
async def release(self, slot: Slot, *, reset_workspace: bool = False) -> None: # noqa: ARG002
raise self._unavailable()
async def execute_batch(
self,
requests: List[Tuple[Slot, str, Dict[str, Any]]],
*,
timeout_s: Optional[float] = None, # noqa: ARG002
) -> List[ExecutionResult]:
raise self._unavailable()