"""请求规范化与桶解析（T-P5 落地；本文件先立签名）。"""
from __future__ import annotations

from typing import Any, Dict


def resolve_bucket(body: dict, headers: dict, cfg) -> Any:
    """解析课程桶：X-Campus-Bucket 头 > model->bucket 映射 > default（T-P5 实现）。"""
    raise NotImplementedError("T-P5")


def canonical_hash(bucket: str, doc_version: int, body: dict) -> str:
    """规范化哈希：稳定序列化 -> sha256（五规则见 §6；T-P5 实现）。"""
    raise NotImplementedError("T-P5")


def shape(body: dict, bucket_cfg) -> dict:
    """整形上游请求体：[canonical_system] -> [doc_prefix] -> [原 messages]（T-P5 实现）。"""
    raise NotImplementedError("T-P5")