mirror of
https://github.com/bytedance/deer-flow.git
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5ffc2d3e27
* feat(mcp): add reliable task notifications and cancellation * feat(mcp): add background task chat UI * fix(mcp): hide and sanitize task notification prompts * fix(mcp): sanitize projected task names * fix(mcp): harden task notifications and details * fix(mcp): harden task lifecycle recovery * fix(mcp): gate task UI and isolate cancellations * test: scope plain-text response locator * fix(mcp): align task notification boundaries * fix(mcp): bound task delivery retries * fix background task notification races
85 lines
3.1 KiB
Python
85 lines
3.1 KiB
Python
"""Natural-language management tools for the current thread's MCP tasks."""
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from __future__ import annotations
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from typing import Annotated, Any
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from langchain.tools import tool
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from deerflow.agents.middlewares.input_sanitization_middleware import neutralize_untrusted_tags
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from deerflow.mcp.tasks.runtime import get_mcp_task_submitter
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from deerflow.tools.builtins.list_uploaded_files_tool import _resolve_thread_id, _resolve_user_id
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from deerflow.tools.types import Runtime
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def _public_task(record: dict[str, Any]) -> dict[str, Any]:
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return {
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"task_id": record["id"],
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"task_name": neutralize_untrusted_tags(str(record.get("task_name") or "Background task")),
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"status": record.get("status"),
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"created_at": record.get("created_at"),
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"updated_at": record.get("updated_at"),
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"error": neutralize_untrusted_tags(str(record["error"])) if record.get("error") else None,
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"cancel_requested": bool(record.get("cancel_requested_at")),
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}
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async def _list_background_tasks_impl(
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runtime: Runtime,
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*,
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active_only: bool = False,
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limit: int = 20,
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) -> dict[str, Any]:
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thread_id = _resolve_thread_id(runtime)
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if thread_id is None:
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return {"tasks": [], "message": "The current thread could not be resolved."}
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records = await get_mcp_task_submitter().list_tasks(
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thread_id=thread_id,
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user_id=_resolve_user_id(runtime),
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limit=max(1, min(limit, 50)),
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active_only=active_only,
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)
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tasks = [_public_task(record) for record in records]
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return {"tasks": tasks, "count": len(tasks)}
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@tool
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async def list_background_tasks(
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runtime: Runtime,
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active_only: Annotated[bool, "Return only tasks that are still active."] = False,
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) -> dict[str, Any]:
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"""List current and recent durable background tasks for this chat."""
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return await _list_background_tasks_impl(runtime, active_only=active_only)
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@tool
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async def cancel_background_task(
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runtime: Runtime,
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task: Annotated[
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str | None,
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"Optional exact task name or DeerFlow task ID. Omit it only when one active task exists.",
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] = None,
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) -> dict[str, Any]:
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"""Cancel one active background task in this chat.
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If several tasks are active, provide the exact task name shown by
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list_background_tasks. Remote MCP task handles are never needed or exposed.
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"""
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thread_id = _resolve_thread_id(runtime)
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if thread_id is None:
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return {"cancelled": False, "message": "The current thread could not be resolved."}
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try:
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record = await get_mcp_task_submitter().cancel_matching_task(
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thread_id=thread_id,
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user_id=_resolve_user_id(runtime),
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task=task,
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)
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except (LookupError, ValueError) as exc:
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return {"cancelled": False, "message": neutralize_untrusted_tags(str(exc))}
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public = _public_task(record)
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return {
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"cancelled": public["status"] == "cancelled",
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"task": public,
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"message": "Cancellation requested. DeerFlow will keep retrying safely if the remote server is temporarily unavailable.",
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}
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