diff --git a/plugin/editor.lua b/plugin/editor.lua
index 11068e8..fad36ff 100644
--- a/plugin/editor.lua
+++ b/plugin/editor.lua
@@ -12,6 +12,7 @@ add({
     'm4xshen/hardtime.nvim', -- workflow
     'mg979/vim-visual-multi', -- multiple cursors
     { src = 'iamcco/markdown-preview.nvim', build = 'cd app && npm install' },
+    'kevinhwang91/nvim-hlslens',
     -- 'nvim-flutter/flutter-tools.nvim', -- flutter tools
 })
 
@@ -59,6 +60,8 @@ require('nvim-treesitter').setup({
     },
 })
 
+require('hlslens').setup()
+
 -- windsurf
 vim.keymap.set('i', '<A-f>', function()
     return vim.fn['codeium#Accept']()
@@ -66,4 +69,3 @@ end, { expr = true, silent = true })
 vim.keymap.set('i', '<A-x>', function()
     return vim.fn['codeium#Clear']()
 end, { expr = true, silent = true })
-
diff --git a/plugin/lsp.lua b/plugin/lsp.lua
new file mode 100644
index 0000000..e563506
--- /dev/null
+++ b/plugin/lsp.lua
@@ -0,0 +1,135 @@
+add({
+    'mason-org/mason.nvim', -- lsp installer manager
+    'mason-org/mason-lspconfig.nvim', -- lsp installer
+    'neovim/nvim-lspconfig', -- lsp config
+    'rachartier/tiny-inline-diagnostic.nvim', -- inline diagnostic
+    'rachartier/tiny-code-action.nvim', -- code action
+    'saghen/blink.lib',
+    { src = 'saghen/blink.cmp', build = 'cargo build --release' },
+    'rafamadriz/friendly-snippets',
+})
+
+require('blink.cmp').setup({
+    fuzzy = { implementation = 'prefer_rust' },
+    snippets = { preset = 'default' },
+    sources = {
+        default = function()
+            local type = vim.fn.getcmdtype()
+            if type == '/' or type == '?' then
+                return { 'buffer' }
+            end
+            if type == ':' then
+                return { 'cmdline' }
+            end
+            return { 'lsp', 'path', 'snippets', 'buffer' }
+        end,
+        providers = {
+            snippets = {
+                opts = {
+                    search_paths = { vim.fn.stdpath('config') .. '/snippets' },
+                    extended_filetypes = { mdx = { 'markdown' } },
+                },
+            },
+        },
+    },
+
+    completion = {
+        ghost_text = { enabled = true },
+
+        list = {
+            selection = {
+                preselect = false,
+                auto_insert = true,
+            },
+        },
+        documentation = {
+            window = { border = 'rounded' },
+            auto_show = true,
+            auto_show_delay_ms = 50,
+        },
+        menu = {
+            border = 'rounded',
+            draw = {
+                components = {
+                    kind_icon = {
+                        text = function(ctx)
+                            local kind_icon, _, _ = require('mini.icons').get('lsp', ctx.kind)
+                            return kind_icon
+                        end,
+                        highlight = function(ctx)
+                            local _, hl, _ = require('mini.icons').get('lsp', ctx.kind)
+                            return hl
+                        end,
+                    },
+                    kind = {
+                        highlight = function(ctx)
+                            local _, hl, _ = require('mini.icons').get('lsp', ctx.kind)
+                            return hl
+                        end,
+                    },
+                },
+            },
+        },
+    },
+    signature = {
+        window = { border = 'rounded' },
+    },
+    keymap = {
+        preset = 'none',
+        ['<S-Tab>'] = { 'select_prev', 'snippet_backward', 'fallback' },
+        ['<Tab>'] = { 'select_next', 'snippet_forward', 'fallback' },
+        ['<CR>'] = { 'accept', 'fallback' },
+        ['<C-space>'] = { 'hide', 'show' },
+        ['<C-y>'] = { 'show', 'show_documentation', 'hide_documentation' },
+        ['<C-u>'] = { 'scroll_documentation_up', 'fallback' },
+        ['<C-d>'] = { 'scroll_documentation_down', 'fallback' },
+    },
+})
+
+-- lsp installer
+require('mason').setup({
+    ui = {
+        icons = {
+            package_installed = '✓',
+            package_pending = '➜',
+            package_uninstalled = '✗',
+        },
+        border = 'rounded',
+        backdrop = 100,
+    },
+})
+
+require('mason-lspconfig').setup({
+    ensure_installed = require('extensions').lsp_server,
+    automatic_installation = false, -- Don't auto-install or auto-configure
+})
+
+-- improve neovim lsp experience
+vim.api.nvim_create_autocmd('LspAttach', {
+    callback = function()
+        --inline diagnostic
+        require('tiny-inline-diagnostic').setup({
+            options = {
+                show_source = true,
+                multiple_diag_under_cursor = true,
+            },
+        })
+
+        --code action
+        require('tiny-code-action').setup({
+            picker = {
+                'buffer',
+                opts = {
+                    auto_preview = true,
+                    hotkeys = true,
+                    hotkeys_mode = 'sequential',
+                },
+            },
+        })
+    end,
+})
+
+vim.diagnostic.config({ virtual_text = false }) -- Disable default virtual text
+vim.keymap.set('n', '<leader>.', function()
+    require('tiny-code-action').code_action()
+end, { desc = 'Code action' })
diff --git a/plugin/quality.lua b/plugin/quality.lua
new file mode 100644
index 0000000..66ec0df
--- /dev/null
+++ b/plugin/quality.lua
@@ -0,0 +1,75 @@
+add({
+    'mfussenegger/nvim-lint', -- linter
+    'rshkarin/mason-nvim-lint', -- linter installer
+    'stevearc/conform.nvim', -- autoformater
+    'szw/vim-maximizer',
+    'zapling/mason-conform.nvim', -- formatter installer
+})
+
+-- linter
+require('lint').linters_by_ft = {
+    ['*'] = { 'codespell' },
+    ['javascript'] = { 'eslint_d', 'cspell' },
+    ['typescript'] = { 'eslint_d', 'cspell' },
+    ['javascriptreact'] = { 'eslint_d', 'cspell' },
+    ['typescriptreact'] = { 'eslint_d', 'cspell' },
+    ['dockerfile'] = { 'hadolint' },
+    ['markdown'] = { 'write_good', 'markdownlint' },
+    ['text'] = { 'write_good' },
+    ['sh'] = { 'shellcheck' },
+    ['yaml'] = { 'actionlint' },
+    ['python'] = { 'ruff' },
+}
+require('mason-nvim-lint').setup({
+    ensure_installed = require('extensions').linter,
+    automatic_installation = false,
+})
+
+-- formatter
+require('conform').setup({
+    formatters = {
+        ['markdown-toc'] = {
+            condition = function(_, ctx)
+                for _, line in ipairs(vim.api.nvim_buf_get_lines(ctx.buf, 0, -1, false)) do
+                    if line:find('<!%-%-% toc %-%->') then
+                        return true
+                    end
+                end
+            end,
+        },
+    },
+    formatters_by_ft = {
+        ['lua'] = { 'stylua' },
+        ['c'] = { 'clang_format' },
+        ['cpp'] = { 'clang_format' },
+        ['h'] = { 'clang_format' },
+        ['python'] = { 'ruff_fix', 'ruff_format', 'ruff_organize_imports' },
+        ['javascript'] = { 'biome' },
+        ['typescript'] = { 'biome' },
+        ['typescriptreact'] = { 'biome' },
+        ['markdown'] = { 'prettier', 'markdownlint-cli2' },
+        ['markdown.mdx'] = { 'prettier', 'markdownlint-cli2' },
+        ['mdx'] = { 'prettier' },
+        ['_'] = { 'trim_whitespace' },
+    },
+    options = {
+        stop_after_first = true,
+    },
+    format_after_save = function(bufnr)
+        if not vim.b[bufnr].conform_disable then
+            return {
+                lsp_format = 'fallback',
+            }
+        end
+    end,
+})
+
+vim.keymap.set('n', '<leader>tf', function()
+    vim.b.conform_disable = not vim.b.conform_disable
+    local status = vim.b.conform_disable and 'disabled' or 'enabled'
+    vim.notify('Autoformat ' .. status, vim.log.levels.INFO)
+end, { desc = 'Toggle autoformat' })
+require('mason-conform').setup({
+    ensure_installed = require('extensions').formatter,
+    automatic_installation = true,
+})