diff --git a/nvim/lua/linter.lua b/nvim/lua/linter.lua
new file mode 100644
index 0000000..f724f9e
--- /dev/null
+++ b/nvim/lua/linter.lua
@@ -0,0 +1,3 @@
+vim.pack.add({
+  'https://github.com/dense-analysis/ale',
+})
diff --git a/nvim/lua/lsp.lua b/nvim/lua/lsp.lua
index 5095427..109d1cf 100644
--- a/nvim/lua/lsp.lua
+++ b/nvim/lua/lsp.lua
@@ -1,15 +1,16 @@
 vim.pack.add({
-  'https://github.com/neovim/nvim-lspconfig'
+  'https://github.com/neovim/nvim-lspconfig',
+  'https://github.com/mason-org/mason.nvim',
+  'https://github.com/rachartier/tiny-inline-diagnostic.nvim',
 })
 
--- .ts .js
-vim.lsp.enable('typescript')
+-- mason
+require("mason").setup()
 
-
--- .lua
-vim.lsp.config('luals', {
-  cmd = {'lua-language-server'},
-  filetypes = {'lua'},
-  root_markers = {'.luarc.json', '.luarc.jsonc'},
+-- diagnostics
+require("tiny-inline-diagnostic").setup({
+    -- Choose a preset style for diagnostic appearance
+    -- Available: "modern", "classic", "minimal", "powerline", "ghost", "simple", "nonerdfont", "amongus"
+  preset = "modern",
 })
-vim.lsp.enable('luals')
+require("tiny-inline-diagnostic").enable()
diff --git a/nvim/lua/~/.config/nvim/undo/%home%gaiety%dotfiles%nvim%lua%telescope.lua b/nvim/lua/~/.config/nvim/undo/%home%gaiety%dotfiles%nvim%lua%telescope.lua
deleted file mode 100644
index 1fe2267..0000000
Binary files a/nvim/lua/~/.config/nvim/undo/%home%gaiety%dotfiles%nvim%lua%telescope.lua and /dev/null differ
diff --git a/nvim/lua/~/.config/nvim/undo/%home%gaiety%dotfiles%nvim%lua%undo.lua b/nvim/lua/~/.config/nvim/undo/%home%gaiety%dotfiles%nvim%lua%undo.lua
deleted file mode 100644
index 58637bc..0000000
Binary files a/nvim/lua/~/.config/nvim/undo/%home%gaiety%dotfiles%nvim%lua%undo.lua and /dev/null differ