Unverified50% confidenceFactExact time
Once any minor change appears in the first half of a prompt — such as a dynamic timestamp, a user's name, or a real-time retrieval result — the entire cache prefix is invalidated.
1
Sources
50%
Confidence
Long-term
Relevance
9/22/2026
First Seen
Sources
Related Entities
Related Claims
UnverifiedPrompt缓存必须从前缀开始严格匹配，一旦中间某个token变化，其后所有token的注意力计算都会改变，已缓存的KV对随之失效70% similarUnverified缓存命中的前提是提示词内容保持稳定，若系统提示词中包含动态插入的时间戳、会话ID或随机内容则会造成缓存失效67% similarUnverifiedPrompt 缓存依赖于前缀的精确匹配，一旦技能定义的顺序或内容发生微小变化，缓存即失效67% similarUnverifiedWhen role tokens become misaligned due to abnormal session states, context truncation, or internal cache errors, the model may misread its own generated text as user input65% similarUnverifiedText search results filled with false positives can cause AI agents to modify the wrong code locations, miss call sites that must be updated in sync, or consume large numbers of tokens sifting through irrelevant results.64% similar
Cite This Claim
Stable URI
https://kongchang.com/claim/942068API
curl https://kongchang.com/api/v1/knowledge/claims/942068MCP
get_claim(id=942068)