docs: mention bundled CLI usage skill in README

README.en.md

@@ -61,6 +61,13 @@ gitea-pr-review version
 # v1
 ```
 
+## Skill For LLMs
+
+This repository includes a reusable skill for other LLMs to operate this CLI correctly:
+
+- Path: `skills/gitea-pr-review-cli/SKILL.md`
+- Scope: standardized usage of `fetch` / `render-md` / `version`, `v1` version contract, and troubleshooting
+
 ## Markdown Output Shape (Example)
 
 ````md

README.md

@@ -61,6 +61,13 @@ gitea-pr-review version
 # v1
 ```
 
+## 给 LLM 的 Skill
+
+仓库内已提供一个可复用 skill，帮助其他 LLM 正确使用本 CLI：
+
+- 路径：`skills/gitea-pr-review-cli/SKILL.md`
+- 用途：标准化 `fetch` / `render-md` / `version` 的调用方式、`v1` 版本约束和常见错误排查
+
 ## Markdown 输出结构（示例）
 
 ````md