diff --git a/.github/select_xcode_ci.sh b/.github/select_xcode_ci.sh
new file mode 100644
index 0000000..ec802db
--- /dev/null
+++ b/.github/select_xcode_ci.sh
@@ -0,0 +1,37 @@
+#!/usr/bin/env bash
+# 在 Runner / 本机上选择 /Applications 里「版本号最高」的 Xcode（读 Info.plist），
+# 不绑定 26 / 27 / 28：镜像侧载命名 Xcode_16.x / Xcode_26.x / Xcode_27.x 或仅 Xcode.app 均可自动跟上。
+set -euo pipefail
+shopt -s nullglob
+
+bundle_short_version() {
+  local app="$1"
+  /usr/libexec/PlistBuddy -c 'Print :CFBundleShortVersionString' "$app/Contents/Info.plist" 2>/dev/null || true
+}
+
+declare -a candidates=(/Applications/Xcode_[0-9]*.app)
+[[ -d /Applications/Xcode.app ]] && candidates+=(/Applications/Xcode.app)
+
+best_app=""
+best_ver="0.0.0"
+
+for app in "${candidates[@]}"; do
+  [[ -d "$app" ]] || continue
+  ver="$(bundle_short_version "$app")"
+  [[ -n "$ver" ]] || continue
+  hi="$(printf '%s\n' "$best_ver" "$ver" | sort -V | tail -n 1)"
+  if [[ "$hi" == "$ver" ]]; then
+    best_ver="$ver"
+    best_app="$app"
+  fi
+done
+
+if [[ -z "$best_app" ]]; then
+  echo "::error::No usable Xcode under /Applications (need Xcode_[0-9]*.app or Xcode.app with Info.plist)."
+  ls -la /Applications/Xcode*.app 2>/dev/null || true
+  exit 1
+fi
+
+echo "Using: $best_app (CFBundleShortVersionString=$best_ver)"
+sudo xcode-select -s "$best_app"
+xcodebuild -version
diff --git a/.github/workflows/swift.yml b/.github/workflows/swift.yml
index d8abfe2..2d48628 100644
--- a/.github/workflows/swift.yml
+++ b/.github/workflows/swift.yml
@@ -17,9 +17,9 @@ jobs:
     steps:
       - uses: actions/checkout@v4
 
-      # 默认 xcode-select 常为旧版；脚本按 Info.plist 版本号选 /Applications 下最高的 Xcode（见 .github/scripts/select_xcode_ci.sh）。
+      # 默认 xcode-select 常为旧版；脚本按 Info.plist 版本号选 /Applications 下最高的 Xcode（见 .github/select_xcode_ci.sh）。
       - name: Select Xcode
-        run: bash .github/scripts/select_xcode_ci.sh
+        run: bash "${GITHUB_WORKSPACE}/.github/select_xcode_ci.sh"
 
       - name: Check try? policy
         run: bash .github/check_try_question_mark.sh