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Tasks are stored in ~/.stack-2.9/tasks.json.
"""
from __future__ import annotations
import json
import os
import uuid
from dataclasses import dataclass, asdict
from datetime import datetime, timezone
from typing import Any
from .base import BaseTool, ToolResult
from .registry import get_registry
TOOL_NAME = "TaskManagement"
DATA_DIR = os.path.expanduser("~/.stack-2.9")
TASKS_FILE = os.path.join(DATA_DIR, "tasks.json")
def _load_tasks() -> list[dict[str, Any]]:
"""Load tasks from disk."""
os.makedirs(DATA_DIR, exist_ok=True)
if os.path.exists(TASKS_FILE):
try:
with open(TASKS_FILE) as f:
return json.load(f)
except Exception:
pass
return []
def _save_tasks(tasks: list[dict[str, Any]]) -> None:
"""Persist tasks to disk."""
os.makedirs(DATA_DIR, exist_ok=True)
with open(TASKS_FILE, "w") as f:
json.dump(tasks, f, indent=2, default=str)
# ── sub-commands as separate tool classes ─────────────────────────────────────
class TaskCreateTool(BaseTool[dict[str, Any], dict[str, Any]]):
"""Create a new task.
Parameters
----------
subject : str
Brief, actionable title (required).
description : str
Detailed description of what needs to be done.
status : str, optional
One of "pending" (default), "in_progress", "completed", "cancelled".
priority : str, optional
One of "low", "medium", "high", "urgent" (default "medium").
tags : list[str], optional
Arbitrary labels for the task.
metadata : dict, optional
Arbitrary extra data to attach.
"""
name = "TaskCreate"
description = "Create a new task in the task list."
search_hint = "create a task in the task list"
@property
def input_schema(self) -> dict[str, Any]:
return {
"type": "object",
"properties": {
"subject": {"type": "string", "description": "Brief title for the task"},
"description": {"type": "string", "description": "What needs to be done"},
"status": {
"type": "string",
"enum": ["pending", "in_progress", "completed", "cancelled"],
"description": "Task status (default: pending)",
"default": "pending",
},
"priority": {
"type": "string",
"enum": ["low", "medium", "high", "urgent"],
"description": "Priority level (default: medium)",
"default": "medium",
},
"tags": {
"type": "array",
"items": {"type": "string"},
"description": "Labels to attach to the task",
},
"metadata": {
"type": "object",
"description": "Arbitrary extra data",
},
},
"required": ["subject"],
}
def validate_input(self, input_data: dict[str, Any]) -> tuple[bool, str | None]:
if not input_data.get("subject"):
return False, "Error: subject is required"
return True, None
def execute(self, input_data: dict[str, Any]) -> ToolResult[dict[str, Any]]:
tasks = _load_tasks()
task_id = str(uuid.uuid4())[:8]
task = {
"id": task_id,
"subject": input_data["subject"],
"description": input_data.get("description", ""),
"status": input_data.get("status", "pending"),
"priority": input_data.get("priority", "medium"),
"tags": input_data.get("tags", []),
"metadata": input_data.get("metadata", {}),
"created_at": datetime.now(timezone.utc).isoformat(),
"updated_at": datetime.now(timezone.utc).isoformat(),
}
tasks.append(task)
_save_tasks(tasks)
return ToolResult(
success=True,
data={"id": task_id, "subject": task["subject"], "status": task["status"]},
)
def map_result_to_message(self, result: dict, tool_use_id: str | None = None) -> str:
return f"Task #{result['id']} created: {result['subject']} [{result['status']}]"
class TaskListTool(BaseTool[dict[str, Any], dict[str, Any]]):
"""List tasks, optionally filtered by status.
Parameters
----------
status : str, optional
Filter by status: "pending", "in_progress", "completed", "cancelled".
tag : str, optional
Filter by tag.
limit : int, optional
Maximum number of tasks to return (default 50).
"""
name = "TaskList"
description = "List tasks from the task list, optionally filtered."
search_hint = "list tasks in the task list"
@property
def input_schema(self) -> dict[str, Any]:
return {
"type": "object",
"properties": {
"status": {
"type": "string",
"enum": ["pending", "in_progress", "completed", "cancelled"],
"description": "Filter by status",
},
"tag": {"type": "string", "description": "Filter by tag"},
"limit": {
"type": "integer",
"description": "Maximum tasks to return (default 50)",
"default": 50,
"minimum": 1,
"maximum": 200,
},
},
"properties": {
"status": {"type": "string"},
"tag": {"type": "string"},
"limit": {"type": "integer", "default": 50},
},
}
def execute(self, input_data: dict[str, Any]) -> ToolResult[dict[str, Any]]:
tasks = _load_tasks()
status_filter = input_data.get("status")
tag_filter = input_data.get("tag")
limit = input_data.get("limit", 50)
if status_filter:
tasks = [t for t in tasks if t.get("status") == status_filter]
if tag_filter:
tasks = [t for t in tasks if tag_filter in t.get("tags", [])]
tasks = tasks[:limit]
return ToolResult(
success=True,
data={
"tasks": [
{
"id": t["id"],
"subject": t["subject"],
"status": t["status"],
"priority": t.get("priority", "medium"),
"tags": t.get("tags", []),
"created_at": t.get("created_at", ""),
}
for t in tasks
],
"total": len(tasks),
},
)
def map_result_to_message(self, result: dict, tool_use_id: str | None = None) -> str:
tasks = result.get("tasks", [])
if not tasks:
return "No tasks found."
lines = [f"{result['total']} task(s):\n"]
for t in tasks:
tags = ", ".join(t.get("tags", [])) if t.get("tags") else ""
lines.append(f" [{t['status']:12}] #{t['id']} {t['subject']} {'| ' + tags if tags else ''}")
return "\n".join(lines)
class TaskUpdateTool(BaseTool[dict[str, Any], dict[str, Any]]):
"""Update a task by ID.
Parameters
----------
id : str
The task ID (required).
subject : str, optional
New title.
description : str, optional
New description.
status : str, optional
New status.
priority : str, optional
New priority.
tags : list[str], optional
New tags (replaces existing).
"""
name = "TaskUpdate"
description = "Update an existing task by ID."
search_hint = "update a task in the task list"
@property
def input_schema(self) -> dict[str, Any]:
return {
"type": "object",
"properties": {
"id": {"type": "string", "description": "Task ID (required)"},
"subject": {"type": "string", "description": "New title"},
"description": {"type": "string", "description": "New description"},
"status": {
"type": "string",
"enum": ["pending", "in_progress", "completed", "cancelled"],
},
"priority": {"type": "string", "enum": ["low", "medium", "high", "urgent"]},
"tags": {"type": "array", "items": {"type": "string"}, "description": "Replace tags"},
"metadata": {"type": "object", "description": "Merge into metadata"},
},
"required": ["id"],
}
def validate_input(self, input_data: dict[str, Any]) -> tuple[bool, str | None]:
if not input_data.get("id"):
return False, "Error: id is required"
return True, None
def execute(self, input_data: dict[str, Any]) -> ToolResult[dict[str, Any]]:
tasks = _load_tasks()
task_id = input_data["id"]
found = False
for t in tasks:
if t["id"] == task_id:
if "subject" in input_data:
t["subject"] = input_data["subject"]
if "description" in input_data:
t["description"] = input_data["description"]
if "status" in input_data:
t["status"] = input_data["status"]
if "priority" in input_data:
t["priority"] = input_data["priority"]
if "tags" in input_data:
t["tags"] = input_data["tags"]
if "metadata" in input_data:
t["metadata"] = {**t.get("metadata", {}), **input_data["metadata"]}
t["updated_at"] = datetime.now(timezone.utc).isoformat()
found = True
break
if not found:
return ToolResult(success=False, error=f"Task #{task_id} not found")
_save_tasks(tasks)
return ToolResult(success=True, data={"id": task_id, "status": t.get("status")})
def map_result_to_message(self, result: dict, tool_use_id: str | None = None) -> str:
return f"Task #{result['id']} updated."
class TaskDeleteTool(BaseTool[dict[str, Any], dict[str, Any]]):
"""Delete a task by ID.
Parameters
----------
id : str
The task ID to delete (required).
"""
name = "TaskDelete"
description = "Delete a task by ID."
search_hint = "delete a task"
@property
def input_schema(self) -> dict[str, Any]:
return {
"type": "object",
"properties": {
"id": {"type": "string", "description": "Task ID to delete"},
},
"required": ["id"],
}
def validate_input(self, input_data: dict[str, Any]) -> tuple[bool, str | None]:
if not input_data.get("id"):
return False, "Error: id is required"
return True, None
def execute(self, input_data: dict[str, Any]) -> ToolResult[dict[str, Any]]:
tasks = _load_tasks()
task_id = input_data["id"]
original_len = len(tasks)
tasks = [t for t in tasks if t["id"] != task_id]
if len(tasks) == original_len:
return ToolResult(success=False, error=f"Task #{task_id} not found")
_save_tasks(tasks)
return ToolResult(success=True, data={"id": task_id, "deleted": True})
def map_result_to_message(self, result: dict, tool_use_id: str | None = None) -> str:
return f"Task #{result['id']} deleted."
# Register all task tools
_registry = get_registry()
_registry.register(TaskCreateTool())
_registry.register(TaskListTool())
_registry.register(TaskUpdateTool())
_registry.register(TaskDeleteTool())
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