docs(pkg): translate SKILL.md into English per guidelines

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

skills/pkg-update/SKILL.md

@@ -3,20 +3,20 @@ name: pkg-update
 description: Update every external package of a project to its latest stable version using list-packages.sh and latest-version.sh, then run build and tests. Revert all changes on failure. Supports nodejs, python, and dotnet projects. Use for dependency refresh; not for adding or removing packages.
 ---
 
-# pkg-update — 套件批次更新
+# pkg-update — batch-update packages
 
-## 步驟
+## Steps
 
-1. `tools/list-packages.sh {專案目錄}` 取得所有外部套件（ecosystem / name / current）。
-2. 確認工作樹乾淨：有未認可變更就先停止並回報（避免還原時誤傷）。
-3. 逐 ecosystem 更新，此步驟**必須以 sub agent 執行**（每個 ecosystem 一個 sub agent）：
-   1. 對每個套件 `tools/latest-version.sh {ecosystem} {name}` 查最新穩定版。
-   2. 改寫版本來源檔（package.json / requirements.txt / pyproject.toml / *.csproj）。
-   3. 重新解析安裝（`npm install` / `pip install -r` / `dotnet restore`）。
-4. 執行建置與測試：
-   - nodejs：`npm run build`（如有）＋ `npm test`（如有）。
-   - python：`pytest`（如有測試）。
-   - dotnet：`dotnet build` ＋ `dotnet test`。
-   - 推斷不出指令時依 `jsc-ask:ask` 規則詢問使用者。
-5. 建置或測試失敗 → 還原全部變更（`git checkout -- .` 與清除未追蹤的 lock 變更），回報失敗套件與錯誤摘要。
-6. 成功 → 回報更新清單（套件 / 舊版 / 新版），交由 `jsc-git:commit` 認可。
+1. Run `tools/list-packages.sh {project dir}` to get every external package (ecosystem, name, current version).
+2. Confirm the working tree is clean: stop and report when uncommitted changes exist, so the revert cannot destroy them.
+3. Update ecosystem by ecosystem. This step **MUST run as a sub agent** (one sub agent per ecosystem):
+   1. For every package, run `tools/latest-version.sh {ecosystem} {name}` to get the latest stable version.
+   2. Rewrite the version source file (package.json / requirements.txt / pyproject.toml / *.csproj).
+   3. Re-resolve and install (`npm install` / `pip install -r` / `dotnet restore`).
+4. Run build and tests:
+   - nodejs: `npm run build` (if present) plus `npm test` (if present).
+   - python: `pytest` (when tests exist).
+   - dotnet: `dotnet build` plus `dotnet test`.
+   - When the commands cannot be inferred, ask the user per the `jsc-ask:ask` rules.
+5. Build or tests fail → revert every change (`git checkout -- .` and clean untracked lock changes), then report the failing packages with an error summary.
+6. Success → report the update list (package, old version, new version) and hand off to `jsc-git:commit`.