diff --git a/claude/.claude/settings.json b/claude/.claude/settings.json
new file mode 100644
index 0000000..be47d4a
--- /dev/null
+++ b/claude/.claude/settings.json
@@ -0,0 +1,5 @@
+{
+  "enabledPlugins": {
+    "lua-lsp@claude-plugins-official": true
+  }
+}
diff --git a/nvim/.config/nvim/after/plugin/conform.lua b/nvim/.config/nvim/after/plugin/conform.lua
index bbe068b..c733c23 100644
--- a/nvim/.config/nvim/after/plugin/conform.lua
+++ b/nvim/.config/nvim/after/plugin/conform.lua
@@ -2,17 +2,89 @@ if vim.g.vscode then
   return
 end
 
-require("conform").setup({
-  format_on_save = {
-    -- These options will be passed to conform.format()
-    timeout_ms = 500,
-    lsp_format = "fallback",
+local util = require("conform.util")
+local vite_plus = require("greg.vite_plus")
+
+-- vp fmt evaluates vite.config.ts and applies the fmt block. oxfmt LSP cannot load
+-- vite.config.ts files that contain functions (e.g. lazyPlugins).
+require("conform").formatters.vp_fmt = {
+  meta = {
+    url = "https://viteplus.dev",
+    description = "Vite+ formatter via vp fmt (vite.config.ts fmt block)",
   },
+  command = util.from_node_modules("vp"),
+  args = { "fmt", "--stdin-filepath", "$FILENAME" },
+  stdin = true,
+  cwd = function(_, ctx)
+    return vim.fs.root(ctx.dirname, { "vite.config.ts", "vite.config.mts", "package.json" })
+  end,
+}
+
+---@param bufnr integer
+---@return boolean
+local function is_js_ts_buf(bufnr)
+  local ft = vim.bo[bufnr].filetype
+  return ft == "typescript" or ft == "typescriptreact" or ft == "javascript" or ft == "javascriptreact"
+end
+
+---@param bufnr integer
+---@return boolean
+local function use_vp_fmt(bufnr)
+  return vite_plus.is_project(bufnr) and is_js_ts_buf(bufnr)
+end
+
+---@param bufnr integer
+---@return string|nil project_root
+local function js_ts_root(bufnr)
+  local name = vim.api.nvim_buf_get_name(bufnr)
+  if name == "" then
+    return nil
+  end
+  return vim.fs.root(name, { "package.json", "prettier.config.js", "prettier.config.mjs", ".prettierrc" })
+end
+
+---@param root string
+---@return boolean
+local function has_local_prettier(root)
+  return vim.fn.executable(root .. "/node_modules/.bin/prettier") == 1
+end
+
+---@param bufnr integer
+---@return conform.FiletypeFormatter
+local function js_ts_formatters(bufnr)
+  if vite_plus.is_project(bufnr) then
+    return { "vp_fmt", lsp_format = "never", timeout_ms = 5000 }
+  end
+
+  -- Prefer project prettier (MilkTea, etc.). Global prettierd comes from fnm/npm, not
+  -- brew — Homebrew prettierd shebangs break once node lives under fnm.
+  local root = js_ts_root(bufnr)
+  if root and has_local_prettier(root) then
+    return { "prettier", lsp_format = "never" }
+  end
+
+  return { "prettierd", "prettier", lsp_format = "never" }
+end
+
+require("conform").setup({
+  -- vp fmt shells out (~100ms+); run async after save so :w does not block the UI.
+  format_on_save = function(bufnr)
+    if use_vp_fmt(bufnr) then
+      return nil
+    end
+    return { timeout_ms = 500 }
+  end,
+  format_after_save = function(bufnr)
+    if not use_vp_fmt(bufnr) then
+      return nil
+    end
+    return { timeout_ms = 5000, async = true }
+  end,
   formatters_by_ft = {
     lua = { "stylua" },
-    typescript = { "prettierd", "prettier", stop_after_first = true },
-    typescriptreact = { "prettierd", "prettier", stop_after_first = true },
-    javascript = { "prettierd", "prettier", stop_after_first = true },
-    javascriptreact = { "prettierd", "prettier", stop_after_first = true },
+    typescript = js_ts_formatters,
+    typescriptreact = js_ts_formatters,
+    javascript = js_ts_formatters,
+    javascriptreact = js_ts_formatters,
   },
 })
diff --git a/nvim/.config/nvim/after/plugin/none-ls.lua b/nvim/.config/nvim/after/plugin/none-ls.lua
index d6dca02..c6a5d0f 100644
--- a/nvim/.config/nvim/after/plugin/none-ls.lua
+++ b/nvim/.config/nvim/after/plugin/none-ls.lua
@@ -4,17 +4,39 @@ end
 
 local null_ls = require("null-ls")
 
-null_ls.setup({
-  sources = {
-    null_ls.builtins.formatting.stylua,
-    null_ls.builtins.completion.spell,
-    -- requires none-ls-extras.nvim
-    require("none-ls.diagnostics.eslint_d"),
-    -- requires none-ls-shellcheck.nvim
-    require("none-ls-shellcheck.diagnostics"),
-    require("none-ls-shellcheck.code_actions"),
-  },
-})
+local eslint_config_files = {
+  "eslint.config.js",
+  "eslint.config.mjs",
+  "eslint.config.cjs",
+  "eslint.config.ts",
+  ".eslintrc",
+  ".eslintrc.js",
+  ".eslintrc.json",
+  ".eslintrc.cjs",
+  ".eslintrc.yaml",
+  ".eslintrc.yml",
+}
+
+local sources = {
+  null_ls.builtins.formatting.stylua,
+  null_ls.builtins.completion.spell,
+  -- requires none-ls-shellcheck.nvim
+  require("none-ls-shellcheck.diagnostics"),
+  require("none-ls-shellcheck.code_actions"),
+}
+
+-- Only run eslint_d when an ESLint config exists at the project root.
+-- Avoids JSON-decode errors in Vite+ / oxlint-only repos that have no ESLint config.
+table.insert(
+  sources,
+  require("none-ls.diagnostics.eslint_d").with({
+    condition = function(utils)
+      return utils.root_has_file(eslint_config_files)
+    end,
+  })
+)
+
+null_ls.setup({ sources = sources })
 
 -- Display code actions.
 vim.keymap.set("n", "<C-m>", vim.lsp.buf.code_action, { desc = "Code action" })
diff --git a/nvim/.config/nvim/after/plugin/oxc.lua b/nvim/.config/nvim/after/plugin/oxc.lua
new file mode 100644
index 0000000..0797630
--- /dev/null
+++ b/nvim/.config/nvim/after/plugin/oxc.lua
@@ -0,0 +1,20 @@
+if vim.g.vscode then
+  return
+end
+
+-- Oxlint via native LSP. oxfmt LSP stays enabled for non-TS assets; Vite+ TS/JS
+-- formatting uses conform's vp_fmt formatter (see after/plugin/conform.lua).
+
+vim.lsp.config("oxlint", {
+  init_options = {
+    settings = {
+      run = "onType",
+      fixKind = "safe_fix",
+    },
+  },
+})
+
+vim.lsp.enable("oxlint")
+vim.lsp.enable("oxfmt")
+
+vim.keymap.set("n", "<leader>xl", "<cmd>LspOxlintFixAll<CR>", { desc = "Oxlint fix all" })
diff --git a/nvim/.config/nvim/lua/greg/pack.lua b/nvim/.config/nvim/lua/greg/pack.lua
index ae8ffa2..22172ee 100644
--- a/nvim/.config/nvim/lua/greg/pack.lua
+++ b/nvim/.config/nvim/lua/greg/pack.lua
@@ -31,7 +31,7 @@ vim.pack.add({
 
   { src = gh("williamboman/mason.nvim"), version = "cb8445f8ce85d957416c106b780efd51c6298f89" },
   { src = gh("williamboman/mason-lspconfig.nvim"), version = "0c2823e0418f3d9230ff8b201c976e84de1cb401" },
-  { src = gh("neovim/nvim-lspconfig"), version = "31026a13eefb20681124706a79fc1df6bf11ab27" },
+  { src = gh("neovim/nvim-lspconfig"), version = "bfcc0171a43f22afa61d927ffe9fcb6cb85dc99e" },
   { src = gh("hrsh7th/nvim-cmp"), version = "a1d504892f2bc56c2e79b65c6faded2fd21f3eca" },
   { src = gh("hrsh7th/cmp-nvim-lsp"), version = "cbc7b02bb99fae35cb42f514762b89b5126651ef" },
   { src = gh("L3MON4D3/LuaSnip"), version = "a62e1083a3cfe8b6b206e7d3d33a51091df25357" },
diff --git a/nvim/.config/nvim/lua/greg/vite_plus.lua b/nvim/.config/nvim/lua/greg/vite_plus.lua
new file mode 100644
index 0000000..b933a5a
--- /dev/null
+++ b/nvim/.config/nvim/lua/greg/vite_plus.lua
@@ -0,0 +1,47 @@
+local M = {}
+
+---@param bufnr integer
+---@return boolean
+function M.is_project(bufnr)
+  local name = vim.api.nvim_buf_get_name(bufnr)
+  if name == "" then
+    return false
+  end
+
+  local root = vim.fs.root(name, { "vite.config.ts", "vite.config.mts", "package.json" })
+  if not root then
+    return false
+  end
+
+  local pkg_path = root .. "/package.json"
+  if vim.fn.filereadable(pkg_path) == 1 then
+    local ok, data = pcall(vim.json.decode, table.concat(vim.fn.readfile(pkg_path), "\n"))
+    if ok and type(data) == "table" then
+      for _, key in ipairs({ "dependencies", "devDependencies" }) do
+        local deps = data[key]
+        if type(deps) == "table" and deps["vite-plus"] then
+          return true
+        end
+      end
+      local overrides = data.overrides
+      if type(overrides) == "table" and type(overrides.vite) == "string" and overrides.vite:find("vite%-plus") then
+        return true
+      end
+    end
+  end
+
+  for _, filename in ipairs({ "vite.config.ts", "vite.config.mts" }) do
+    local vite_config = root .. "/" .. filename
+    if vim.fn.filereadable(vite_config) == 1 then
+      for _, line in ipairs(vim.fn.readfile(vite_config)) do
+        if line:find("vite%-plus") then
+          return true
+        end
+      end
+    end
+  end
+
+  return false
+end
+
+return M
diff --git a/nvim/.config/nvim/nvim-pack-lock.json b/nvim/.config/nvim/nvim-pack-lock.json
index e62d42d..298533d 100644
--- a/nvim/.config/nvim/nvim-pack-lock.json
+++ b/nvim/.config/nvim/nvim-pack-lock.json
@@ -86,9 +86,9 @@
       "version": "'a1d504892f2bc56c2e79b65c6faded2fd21f3eca'"
     },
     "nvim-lspconfig": {
-      "rev": "31026a13eefb20681124706a79fc1df6bf11ab27",
+      "rev": "bfcc0171a43f22afa61d927ffe9fcb6cb85dc99e",
       "src": "https://github.com/neovim/nvim-lspconfig",
-      "version": "'31026a13eefb20681124706a79fc1df6bf11ab27'"
+      "version": "'bfcc0171a43f22afa61d927ffe9fcb6cb85dc99e'"
     },
     "nvim-transparent": {
       "rev": "8ac59883de84e9cd1850ea25cf087031c5ba7d54",
diff --git a/scripts/brews.sh b/scripts/brews.sh
index fdb60ba..7a2739e 100755
--- a/scripts/brews.sh
+++ b/scripts/brews.sh
@@ -190,7 +190,7 @@ install_python_dev_packages() {
 
 # JavaScript/Node.js developement.
 install_javascript_packages() {
-  prompt_and_install_shell "JavaScript packages" 'brew install fnm oven-sh/bun/bun pnpm fsouza/prettierd/prettierd && fnm install 22 && npm install -g eslint_d typescript-language-server typescript'
+  prompt_and_install_shell "JavaScript packages" 'brew install fnm oven-sh/bun/bun pnpm && fnm install --lts && fnm default lts-latest && eval "$(fnm env)" && npm install -g @fsouza/prettierd eslint_d@15 typescript-language-server typescript'
 }
 
 # Gleam.
diff --git a/scripts/pacs.sh b/scripts/pacs.sh
index 693bfc3..f836054 100755
--- a/scripts/pacs.sh
+++ b/scripts/pacs.sh
@@ -112,8 +112,10 @@ install_lua_packages() {
 install_javascript_packages() {
   prompt_and_install "JavaScript packages" 'pacman -S nodejs npm &&\
     npm install -g fnm &&\
-    fnm install 22 &&\
-    npm install -g eslint_d\
+    fnm install --lts &&\
+    fnm default lts-latest &&\
+    eval "$(fnm env)" &&\
+    npm install -g @fsouza/prettierd eslint_d@15\
       typescript-language-server\
       typescript'
 }