diff --git a/lua/avante/utils.lua b/lua/avante/utils.lua
new file mode 100644
index 0000000..6993623
--- /dev/null
+++ b/lua/avante/utils.lua
@@ -0,0 +1,7 @@
+local M = {}
+
+function M.trim_suffix(str, suffix)
+  return string.gsub(str, suffix .. "$", "")
+end
+
+return M