TodoWrite
Replace your entire todo list with updated tasks, maintaining task IDs, content, status, priority, and metadata for persistent project management.
Instructions
Update the entire task list (complete replacement).
Parameters: todos: List of todo items, each containing: - id: Unique identifier for the task - content: Task description - status: Current status (pending, in_progress, completed) - priority: Task priority (high, medium, low) - metadata: Optional additional data
Returns success status and count of todos written.
Input Schema
TableJSON Schema
| Name | Required | Description | Default |
|---|---|---|---|
| todos | Yes |
Output Schema
TableJSON Schema
| Name | Required | Description | Default |
|---|---|---|---|
No arguments | |||
Implementation Reference
- src/tools/todo_write.py:6-39 (handler)Core handler function `todo_write` that performs validation on input parameters and writes the todos list to the persistent store using `store.write_todos`. This contains the primary execution logic for the TodoWrite tool.
async def todo_write(params: TodoWriteParams) -> TodoWriteResponse: """ Update the entire task list (complete replacement). Parameters: params: Dictionary containing 'todos' list Returns: TodoWriteResponse with success status and todo count Raises: ValidationError: If todos fail validation """ # Validate params structure if not isinstance(params, dict): raise ValidationError("Parameters must be a dictionary") if "todos" not in params: raise ValidationError("Missing required field: todos") todos = params["todos"] try: # Write todos (validation happens inside) count = await store.write_todos(todos) return {"success": True, "count": count} except ValidationError: # Re-raise validation errors raise except Exception as e: # Wrap other errors raise ValidationError(f"Failed to write todos: {str(e)}") - src/server.py:62-88 (registration)MCP tool registration and wrapper handler for `TodoWrite`. Decorated with `@mcp.tool` and delegates to the core `todo_write` function while handling errors.
@mcp.tool async def TodoWrite(todos: list[dict[str, Any]]) -> dict[str, Any]: """ Update the entire task list (complete replacement). Parameters: todos: List of todo items, each containing: - id: Unique identifier for the task - content: Task description - status: Current status (pending, in_progress, completed) - priority: Task priority (high, medium, low) - metadata: Optional additional data Returns success status and count of todos written. """ try: return await todo_write({"todos": todos}) except ValidationError as e: return {"error": {"code": "VALIDATION_ERROR", "message": str(e)}} except Exception as e: return { "error": { "code": "WRITE_ERROR", "message": f"Failed to write todos: {str(e)}", } } - src/types.py:36-43 (schema)Type definitions (schemas) for `TodoWriteParams` input and `TodoWriteResponse` output used in the tool implementation.
class TodoWriteParams(TypedDict): todos: list[dict[str, Any]] class TodoWriteResponse(TypedDict): success: bool count: int