> For the complete documentation index, see [llms.txt](https://ilogtail.gitbook.io/ilogtail-docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://ilogtail.gitbook.io/ilogtail-docs/pre-release/plugins/kuo-zhan-cha-jian/extensions.md).

# 什么是扩展插件

扩展插件用于对其它插件能力的补充（e.g. 鉴权、编解码、熔断、限流……）