diff --git a/.github/workflows/fish-syntax.yml b/.github/workflows/fish-syntax.yml
new file mode 100644
index 0000000..8b3a427
--- /dev/null
+++ b/.github/workflows/fish-syntax.yml
@@ -0,0 +1,153 @@
+name: Fish Shell Syntax & Functionality Check
+
+on:
+  push:
+    branches: [ main, develop ]
+  pull_request:
+    branches: [ main, develop ]
+
+jobs:
+  fish-syntax:
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        os: [ubuntu-latest, macos-latest]
+
+    steps:
+    - name: Checkout code
+      uses: actions/checkout@v4
+
+    - name: Install Fish shell (Ubuntu)
+      if: matrix.os == 'ubuntu-latest'
+      run: |
+        sudo apt-get update
+        sudo apt-get install -y fish
+        fish --version
+
+    - name: Install Fish shell (macOS)
+      if: matrix.os == 'macos-latest'
+      run: |
+        brew install fish
+        fish --version
+
+    - name: Verify Fish installation and version
+      run: |
+        echo "Testing Fish shell installation..."
+        fish --version
+        echo "Current Fish version:"
+        fish -c "echo $version"
+        echo "Fish version compatibility test passed"
+
+    - name: Check Fish syntax
+      run: |
+        # Check syntax for all .fish files
+        for file in *.fish; do
+          if [ -f "$file" ]; then
+            echo "Checking syntax for $file..."
+            fish -c "source $file" || {
+              echo "❌ Syntax error in $file"
+              exit 1
+            }
+            echo "✅ $file syntax OK"
+          fi
+        done
+
+    - name: Test function loading
+      run: |
+        # Test that functions can be loaded without errors
+        fish -c "
+          # Test nvm function definition
+          source nvm.fish
+          functions -t nvm
+          echo '✅ nvm function loaded successfully'
+
+          # Test helper functions
+          if functions -q __nvm_handle_nvmrc_file
+            echo '✅ Helper functions available'
+          end
+        " || {
+          echo "❌ Function loading test failed"
+          exit 1
+        }
+
+    - name: Validate PKGBUILD
+      if: matrix.os == 'ubuntu-latest'
+      run: |
+        # Check if PKGBUILD is valid bash
+        bash -n PKGBUILD
+        echo "✅ PKGBUILD syntax OK"
+
+    - name: Check file permissions
+      run: |
+        # Ensure fish files are executable
+        chmod +x *.fish 2>/dev/null || true
+        echo "✅ File permissions set"
+
+    - name: Run CI test script
+      run: |
+        # Run our comprehensive test suite
+        fish test_ci.fish
+        echo "✅ CI tests passed"
+
+  code-quality:
+    runs-on: ubuntu-latest
+
+    steps:
+    - name: Checkout code
+      uses: actions/checkout@v4
+
+    - name: Check for common issues
+      run: |
+        echo "🔍 Checking code quality..."
+
+        # Check for deprecated syntax
+        if grep -q 'test.*[[:space:]]-a[[:space:]]' *.fish; then
+          echo "❌ Found deprecated '-a' operator in test commands"
+          exit 1
+        fi
+        echo "✅ No deprecated syntax found"
+
+        # Check for proper error handling
+        if grep -q "echo.*error" *.fish | grep -v ">"; then
+          echo "⚠️  Consider redirecting error messages to stderr"
+        fi
+        echo "✅ Error handling check completed"
+
+        # Check file sizes
+        for file in *.fish; do
+          if [ -f "$file" ]; then
+            lines=$(wc -l < "$file")
+            if [ "$lines" -gt 500 ]; then
+              echo "⚠️  $file is large ($lines lines), consider refactoring"
+            fi
+          fi
+        done
+        echo "✅ File size check completed"
+
+  security-scan:
+    runs-on: ubuntu-latest
+
+    steps:
+    - name: Checkout code
+      uses: actions/checkout@v4
+
+    - name: Security check
+      run: |
+        echo "🔒 Running security checks..."
+
+        # Check for potential security issues
+        if grep -q "rm -rf" *.fish *.sh 2>/dev/null; then
+          echo "⚠️  Found 'rm -rf' usage - review for security"
+        fi
+
+        # Check for eval usage
+        if grep -q "eval" *.fish *.sh 2>/dev/null; then
+          echo "⚠️  Found 'eval' usage - review for security"
+        fi
+
+        # Check for hardcoded paths
+        if grep -q "/home/" *.fish *.sh 2>/dev/null | grep -v "#"; then
+          echo "⚠️  Found hardcoded paths - consider using variables"
+        fi
+
+        echo "✅ Security scan completed"
\ No newline at end of file
diff --git a/.gitignore b/.gitignore
index 113cdb5..c891300 100644
--- a/.gitignore
+++ b/.gitignore
@@ -14,7 +14,6 @@ nvm-official-readme.md
 
 # Test and backup files
 *.backup*
-test_*
 backup_*
 
 # Fish shell cache
@@ -39,4 +38,5 @@ Thumbs.db
 
 # custom
 aur-push.sh
-CLAUDE.md
\ No newline at end of file
+CLAUDE.md
+.claude/
\ No newline at end of file
diff --git a/aur-sync.sh b/aur-sync.sh
new file mode 100755
index 0000000..6231095
--- /dev/null
+++ b/aur-sync.sh
@@ -0,0 +1,240 @@
+#!/bin/bash
+
+# AUR 同步脚本
+# 自动将开发仓库的更改同步到 AUR 本地仓库
+
+set -e  # 遇到错误立即退出
+
+# 颜色定义
+RED='\033[0;31m'
+GREEN='\033[0;32m'
+YELLOW='\033[1;33m'
+BLUE='\033[0;34m'
+NC='\033[0m' # No Color
+
+# 脚本配置
+DEV_REPO="/home/chhsich/Git/Mine/NVM-Fish/nvm-fish-aur"
+AUR_REPO="/home/chhsich/Git/Mine/NVM-Fish/nvm-fish-aurpush"
+
+# 打印带颜色的消息
+print_message() {
+    local color=$1
+    local message=$2
+    echo -e "${color}[$(date '+%Y-%m-%d %H:%M:%S')] ${message}${NC}"
+}
+
+# 检查仓库是否存在
+check_repos() {
+    print_message "$BLUE" "检查仓库状态..."
+
+    if [ ! -d "$DEV_REPO" ]; then
+        print_message "$RED" "错误: 开发仓库不存在: $DEV_REPO"
+        exit 1
+    fi
+
+    if [ ! -d "$AUR_REPO" ]; then
+        print_message "$RED" "错误: AUR 仓库不存在: $AUR_REPO"
+        exit 1
+    fi
+
+    print_message "$GREEN" "仓库检查通过"
+}
+
+# 获取当前版本号
+get_current_version() {
+    local pkgbuild_path="$DEV_REPO/PKGBUILD"
+    if [ ! -f "$pkgbuild_path" ]; then
+        print_message "$RED" "错误: 找不到 PKGBUILD 文件: $pkgbuild_path"
+        exit 1
+    fi
+
+    # 提取版本号
+    local version=$(grep "^pkgver=" "$pkgbuild_path" | cut -d'=' -f2)
+    echo "$version"
+}
+
+# 检查是否需要更新
+check_if_update_needed() {
+    local dev_version="$1"
+    local aur_pkgbuild="$AUR_REPO/PKGBUILD"
+
+    if [ ! -f "$aur_pkgbuild" ]; then
+        print_message "$YELLOW" "AUR 仓库中找不到 PKGBUILD，需要更新"
+        return 0
+    fi
+
+    local aur_version=$(grep "^pkgver=" "$aur_pkgbuild" | cut -d'=' -f2)
+
+    if [ "$dev_version" = "$aur_version" ]; then
+        print_message "$YELLOW" "版本号相同 (v$dev_version)，无需更新"
+        return 1
+    else
+        print_message "$GREEN" "检测到版本更新: v$aur_version -> v$dev_version"
+        return 0
+    fi
+}
+
+# 复制文件到 AUR 仓库
+copy_files_to_aur() {
+    local version="$1"
+    print_message "$BLUE" "复制文件到 AUR 仓库..."
+
+    # 复制核心文件
+    cp "$DEV_REPO/PKGBUILD" "$AUR_REPO/"
+    cp "$DEV_REPO/nvm-fish.install" "$AUR_REPO/"
+
+    # 复制 Fish 函数文件
+    cp "$DEV_REPO/"*.fish "$AUR_REPO/"
+
+    # 生成 .SRCINFO
+    cd "$AUR_REPO"
+    makepkg --printsrcinfo > .SRCINFO
+
+    print_message "$GREEN" "文件复制完成"
+}
+
+# 显示更改摘要
+show_changes_summary() {
+    local version="$1"
+    print_message "$BLUE" "=== 更改摘要 ==="
+    print_message "$GREEN" "版本: v$version"
+    print_message "$BLUE" "更新的文件:"
+
+    cd "$AUR_REPO"
+    git status --porcelain
+
+    print_message "$BLUE" "=== 详细更改 ==="
+    git diff --stat
+}
+
+# 显示下一步操作指南
+show_next_steps() {
+    local version="$1"
+    cat << EOF
+
+${GREEN}=== 同步完成！下一步操作指南 ===${NC}
+
+${YELLOW}1. 检查更改:${NC}
+   cd "$AUR_REPO"
+   git status
+   git diff
+
+${YELLOW}2. 如果一切正常，提交更改:${NC}
+   cd "$AUR_REPO"
+   git add .
+   git commit -m "Update nvm-fish to v$version"
+
+${YELLOW}3. 推送到 AUR 远程仓库:${NC}
+   git push origin master
+
+${YELLOW}4. 验证 AUR 包:${NC}
+   # 在本地测试构建
+   makepkg --check
+
+   # 检查 AUR 网站
+   # https://aur.archlinux.org/packages/nvm-fish
+
+${YELLOW}常见问题:${NC}
+- 如果推送失败，请检查 SSH 密钥配置
+- 如果构建失败，请检查 PKGBUILD 语法
+- 如果版本号有问题，请手动编辑 PKGBUILD
+
+${BLUE}提示: 运行以下命令快速提交并推送${NC}
+   cd "$AUR_REPO" && git add . && git commit -m "Update nvm-fish to v$version" && git push origin master
+
+EOF
+}
+
+# 显示使用说明
+show_usage() {
+    cat << EOF
+AUR 同步脚本
+
+用法: $(basename "$0") [选项]
+
+选项:
+    -h, --help      显示此帮助信息
+    -f, --force     强制更新，即使版本号相同也执行
+    -v, --version   显示当前版本号
+    -s, --summary   只显示更改摘要，不执行同步
+
+示例:
+    $(basename "$0")           # 正常同步流程
+    $(basename "$0") --force   # 强制更新
+    $(basename "$0") --version # 显示版本号
+    $(basename "$0") --summary # 显示更改摘要
+
+EOF
+}
+
+# 主函数
+main() {
+    local force=false
+    local summary_only=false
+
+    # 解析命令行参数
+    while [[ $# -gt 0 ]]; do
+        case $1 in
+            -h|--help)
+                show_usage
+                exit 0
+                ;;
+            -f|--force)
+                force=true
+                shift
+                ;;
+            -v|--version)
+                echo "v$(get_current_version)"
+                exit 0
+                ;;
+            -s|--summary)
+                summary_only=true
+                shift
+                ;;
+            *)
+                print_message "$RED" "未知选项: $1"
+                show_usage
+                exit 1
+                ;;
+        esac
+    done
+
+    print_message "$GREEN" "=== AUR 同步脚本启动 ==="
+
+    # 1. 检查仓库
+    check_repos
+
+    # 2. 获取当前版本
+    local current_version=$(get_current_version)
+    print_message "$BLUE" "当前开发仓库版本: v$current_version"
+
+    # 3. 检查是否需要更新
+    if ! $force && ! check_if_update_needed "$current_version"; then
+        if $summary_only; then
+            show_changes_summary "$current_version"
+        fi
+        print_message "$YELLOW" "使用 --force 强制更新"
+        exit 0
+    fi
+
+    if $summary_only; then
+        show_changes_summary "$current_version"
+        exit 0
+    fi
+
+    # 4. 复制文件
+    copy_files_to_aur "$current_version"
+
+    # 5. 显示更改摘要
+    show_changes_summary "$current_version"
+
+    # 6. 显示下一步操作指南
+    show_next_steps "$current_version"
+
+    print_message "$GREEN" "=== AUR 同步完成 ==="
+}
+
+# 脚本入口点
+if [[ "${BASH_SOURCE[0]}" == "${0}" ]]; then
+    main "$@"
+fi
\ No newline at end of file
diff --git a/load_nvm.fish b/load_nvm.fish
index 8fc3af2..40e5a46 100644
--- a/load_nvm.fish
+++ b/load_nvm.fish
@@ -28,7 +28,7 @@ function load_nvm --on-variable="PWD" --description 'Automatically switch Node.j
   set -l current_dir "$PWD"
 
   # Search up the directory tree for .nvmrc
-  while test -z "$nvmrc_path" -a "$current_dir" != "/"
+  while test -z "$nvmrc_path"; and test "$current_dir" != "/"
     if test -f "$current_dir/.nvmrc"
       set nvmrc_path "$current_dir/.nvmrc"
     else
@@ -36,7 +36,7 @@ function load_nvm --on-variable="PWD" --description 'Automatically switch Node.j
     end
   end
 
-  if test -n "$nvmrc_path" -a -f "$nvmrc_path"
+  if test -n "$nvmrc_path"; and test -f "$nvmrc_path"
     # Only call nvm if there's actually a .nvmrc file
     set -l nvmrc_content (cat "$nvmrc_path" 2>/dev/null | string trim)
     if test -n "$nvmrc_content"
@@ -69,7 +69,7 @@ function load_nvm --on-variable="PWD" --description 'Automatically switch Node.j
   else
     # Only revert to default if we're not already on default
     # This avoids calling nvm on every directory without .nvmrc
-    if test -n "$NVM_BIN" -a "$NVM_BIN" != "$HOME/.nvm/versions/node/$(nvm version default 2>/dev/null)/bin"
+    if test -n "$NVM_BIN"; and test "$NVM_BIN" != "$HOME/.nvm/versions/node/$(nvm version default 2>/dev/null)/bin"
       # Use direct bass call to avoid .nvmrc management prompts and output
       set -lx NVM_AUTO 1
       bass source ~/.nvm/nvm.sh --no-use ';' nvm use default
diff --git a/test_ci.fish b/test_ci.fish
new file mode 100755
index 0000000..d8dd7ae
--- /dev/null
+++ b/test_ci.fish
@@ -0,0 +1,171 @@
+#!/usr/bin/env fish
+
+# CI test script for nvm-fish
+# This script runs automated tests to verify nvm-fish functionality
+
+set -g TEST_ROOT (mktemp -d /tmp/nvm-fish-test.XXXXXX)
+set -g ORIGINAL_PWD $PWD
+
+# Cleanup function
+function cleanup
+    cd $ORIGINAL_PWD
+    rm -rf $TEST_ROOT
+    echo "🧹 Test directory cleaned up"
+end
+
+# Register cleanup
+function __trap_exit --on-event fish_exit
+    cleanup
+end
+
+echo "🧪 Starting nvm-fish CI tests..."
+echo "📁 Test directory: $TEST_ROOT"
+
+# Test 1: Syntax validation
+echo ""
+echo "📋 Test 1: Syntax validation"
+set -l test_files (string match '*.fish' -- * | string match -v 'test_ci.fish')
+if test (count $test_files) -eq 0
+    echo "  ⚠️  No .fish files found to test"
+else
+    for file in $test_files
+        if test -f "$file"
+            echo "  Checking $file..."
+            if not fish -c "source \"$file\""
+                echo "❌ Syntax error in $file"
+                exit 1
+            end
+            echo "  ✅ $file"
+        end
+    end
+end
+
+# Test 2: Function definitions
+echo ""
+echo "📋 Test 2: Function definitions"
+fish -c "
+    source \"$ORIGINAL_PWD/nvm.fish\"
+
+    # Check main function exists
+    if functions -q nvm
+        echo '  ✅ nvm function defined'
+    else
+        echo '  ❌ nvm function not found'
+        exit 1
+    end
+
+    # Check helper functions exist
+    set -l helper_functions __nvm_write_nvmrc_file __nvm_handle_nvmrc_file __nvm_create_nvmrc __nvm_prompt_override_nvmrc __nvm_backup_nvmrc
+    for func in $helper_functions
+        if functions -q $func
+            echo "  ✅ $func function defined"
+        else
+            echo "  ❌ $func function not found"
+            exit 1
+        end
+    end
+"
+
+# Test 3: Basic functionality
+echo ""
+echo "📋 Test 3: Basic functionality simulation"
+cd $TEST_ROOT
+
+# Test version extraction regex
+fish -c "
+    set test_output 'Now using node v18.17.0 (npm v9.6.7)'
+    set extracted_version (string match -rg 'Now using node v([0-9]+\.[0-9]+\.[0-9]+)' "$test_output")
+
+    if test \"$extracted_version\" = \"18.17.0\"
+        echo '  ✅ Version extraction works correctly'
+    else
+        echo '  ❌ Version extraction failed: got \"$extracted_version\", expected \"18.17.0\"'
+        exit 1
+    end
+"
+
+# Test cross-platform compatibility
+echo "  🔄 Testing cross-platform compatibility..."
+fish -c "
+    # Test path handling
+    set test_path '/tmp/test/path'
+    if test (dirname \"$test_path\") = '/tmp/test'
+        echo '  ✅ Path handling works correctly'
+    else
+        echo '  ❌ Path handling failed'
+        exit 1
+    end
+
+    # Test string operations
+    set test_string 'v18.17.0'
+    if test (string replace 'v' '' \"$test_string\") = '18.17.0'
+        echo '  ✅ String operations work correctly'
+    else
+        echo '  ❌ String operations failed'
+        exit 1
+    end
+"
+
+# Test 4: File operations
+echo ""
+echo "📋 Test 4: File operations"
+cd $TEST_ROOT
+
+# Test .nvmrc writing
+fish -c "
+    source "$ORIGINAL_PWD/nvm.fish"
+
+    # Test .nvmrc file creation
+    if __nvm_write_nvmrc_file '18.17.0'
+        echo '  ✅ .nvmrc file creation works'
+
+        # Verify file content
+        if test -f .nvmrc
+            set content (cat .nvmrc)
+            if test \"$content\" = \"18.17.0\"
+                echo '  ✅ .nvmrc content correct'
+            else
+                echo '  ❌ .nvmrc content incorrect: $content'
+                exit 1
+            end
+        end
+    else
+        echo '  ❌ .nvmrc file creation failed'
+        exit 1
+    end
+"
+
+# Test 5: Backup functionality
+echo ""
+echo "📋 Test 5: Backup functionality"
+cd $TEST_ROOT
+
+# Create test .nvmrc
+echo "16.20.2" > .nvmrc
+
+fish -c "
+    source "$ORIGINAL_PWD/nvm.fish"
+
+    # Test backup function
+    if __nvm_backup_nvmrc
+        echo '  ✅ Backup function works'
+
+        # Check backup was created
+        if test -d .nvm
+            set backup_files (count .nvm/.nvmrc_* 2>/dev/null)
+            if test $backup_files -gt 0
+                echo '  ✅ Backup file created'
+            else
+                echo '  ❌ No backup files found'
+                exit 1
+            end
+        end
+    else
+        echo '  ❌ Backup function failed'
+        exit 1
+    end
+"
+
+echo ""
+echo "🎉 All CI tests passed!"
+echo "✅ nvm-fish is ready for release"
\ No newline at end of file