"""会话短期记忆薄封装（Wave 0：接口占位，后续接 Redis）。"""

from __future__ import annotations

from app.model.schemas import AuthContext


class MemoryService:
    def session_key(self, session_id: str) -> str:
        return f"session:{session_id}:messages"

    def touch_session(self, ctx: AuthContext, session_id: str) -> None:
        _ = (ctx, session_id)