diff --git a/npm-install/action.yml b/npm-install/action.yml
index 4947fe7..6558718 100644
--- a/npm-install/action.yml
+++ b/npm-install/action.yml
@@ -312,3 +312,22 @@ runs:
           echo "  - 强制安装: ${{ inputs.force-install }}"
           echo "  - Git Stash: ${{ inputs.enable-git-stash }}"
         fi
+        # 诊断工作目录是否存在 .pnpm-store 以及其 Git 状态
+        echo "\n🧪 目录状态自检:"
+        echo "  - PNPM_STORE_DIR: ${PNPM_STORE_DIR:-<unset>}"
+        if [[ -d ".pnpm-store" ]]; then
+          echo "  - 工作目录存在 .pnpm-store 目录"
+          if git rev-parse --git-dir >/dev/null 2>&1; then
+            if git ls-files --error-unmatch .pnpm-store >/dev/null 2>&1; then
+              echo "  - Git 状态: 已被跟踪 (tracked)"
+            elif git check-ignore -q .pnpm-store; then
+              echo "  - Git 状态: 被忽略 (ignored)"
+            else
+              echo "  - Git 状态: 未跟踪 (untracked)"
+            fi
+          else
+            echo "  - Git 仓库: 未检测到 (非 Git 工作目录)"
+          fi
+        else
+          echo "  - 工作目录未发现 .pnpm-store 目录 ✅"
+        fi