from __future__ import annotations

from abc import ABC, abstractmethod
from dataclasses import dataclass, field
from typing import Any


@dataclass(slots=True)
class Task:
    name: str
    payload: dict[str, Any]
    metadata: dict[str, Any] = field(default_factory=dict)


class TaskHandler(ABC):
    @abstractmethod
    def handle(self, task: Task) -> None:
        """Execute domain logic for a task."""