skills使用方法如下： 
1.配置开启： 
打开：.codex/config.toml 
添加下面的： 
[features]
skills = true

2.请在.codex/AGENTS.md 
（注意AGENTS.md要保持大小写完全一致不然无法读取，非常建议添加） 
添加下面的： 
# Global Agent Rules

You have personal skills stored in `~/.codex/skills/`.

Before starting a task, scan available skills.

If a skill matches, read its `SKILL.md` and follow it.

Announce which skill you are using.

这样codex每次对话启动前就会简单扫描一遍skills文件夹，...