diff --git a/bash/.add-on b/bash/.add-on
new file mode 100644
index 0000000..d5f00ba
--- /dev/null
+++ b/bash/.add-on
@@ -0,0 +1,14 @@
+## 更新配置
+dotu() {
+    # 使用 () 包裹命令会在子进程中运行，执行完后当前终端路径不会改变
+    (
+        cd "$HOME/.flinty" || exit
+        if git pull; then
+            echo "Git updated."
+        fi
+    )
+    
+    # 在主进程刷新配置
+    source ~/.bashrc
+    echo "Config reloaded successfully!"
+}
\ No newline at end of file
diff --git a/fish/add-on.fish b/fish/add-on.fish
index f167f13..da6b6a0 100644
--- a/fish/add-on.fish
+++ b/fish/add-on.fish
@@ -1,3 +1,4 @@
+## 替换 ls 默认行为
 function ls --description 'alias ls to eza if possible'
     if type -q eza
         eza -la --icons $argv
@@ -6,6 +7,7 @@ function ls --description 'alias ls to eza if possible'
     end
 end
 
+## 更新配置
 function dotu
     set -l current_dir (pwd)