Unverified50% confidenceFactExact time

当进行摘要或压缩时，上下文变成新内容导致缓存立即失效，必须为转换后的token支付全价

1

Sources

50%

Confidence

Long-term

Relevance

8/20/2026

First Seen

Sources

Context Engineering in Practice: Why Keeping Everything Actually Costs Less

Related Claims

Unverified系统提示词中应避免加入时间戳、当前工作目录等动态内容，否则会使其后的整个缓存全部失效导致成本飙升69% similar Unverified提升分词器压缩率意味着在相同 token 预算内可以容纳更多原始文本，直接降低 API 调用费用63% similar

Cite This Claim

Stable URI

https://kongchang.com/claim/778556

API

curl https://kongchang.com/api/v1/knowledge/claims/778556

MCP

get_claim(id=778556)