DeltaTask MCP Server

Instructions

Implementation Reference

• server.py:77-80 (handler)

  MCP tool handler function for 'create_subtasks', registered via @mcp.tool() decorator. Delegates to TaskService.create_subtasks.

  @mcp.tool()
  async def create_subtasks(task_id: str, subtasks: list[dict[str, Any]]) -> dict[str, Any]:
      """Create multiple subtasks for a parent task with categories."""
      return service.create_subtasks(task_id, subtasks)

• deltatask/services/task_service.py:245-265 (helper)

  Core implementation of create_subtasks in TaskService class. Validates parent task, sets parent_id on each subtask, calls add_task to create them, and returns subtask IDs.

  def create_subtasks(self, task_id: str, 
                    subtasks: List[Dict[str, Any]]) -> Dict[str, Any]:
      """Create subtasks for a task and return their IDs."""
      # Check if parent task exists
      parent_task = self.repository.get_todo_by_id(task_id)
      if not parent_task:
          return {"error": "Parent task not found"}
      
      subtask_ids = []
      
      # Create each subtask
      for subtask in subtasks:
          subtask['parent_id'] = task_id
          subtask_id = self._ensure_id(subtask)
          self.add_task(subtask)
          subtask_ids.append(subtask_id)
      
      return {
          "message": f"Created {len(subtask_ids)} subtasks",
          "subtask_ids": subtask_ids
      }