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这篇工作检验训练数据抽取是否跨语言：英语段落里记住的 PII，能否被其他语言的前缀逐字抽出。

Skill-as-API 是面向智能体软件工程的协调协议，用来在跨组织调用时把 skill 的代码和系统提示词留在所有者进程。作者针对三条威胁：经通道或命名空间抽取专有方法，用注入让被调用模型输出系统提示词，以及协作结束后权限继续保留。

This work evaluates and hardens the confidentiality of LLM system instructions under encoded extraction. The authors are concerned with: when direct extraction has been rejected, whether the model still surrenders protected content when the same request is rewritten as a formatting or encoding task.

This is a user-side defense: reducing LLM inference of sensitive attributes before the text is made public, rather than modifying attack prompts or weakening model reasoning.

ContextLeak 是一套用成员推断审计私有 ICL 的框架，目标是给 worst-case 泄漏一个经验下界，而不是只引用理论 ε。