3 files changed, 21 insertions, 6 deletions
diff --git a/runtime/lua/vim/_init_packages.lua b/runtime/lua/vim/_init_packages.lua
index 0c4ee8636d..e3a442af5e 100644
--- a/runtime/lua/vim/_init_packages.lua
+++ b/runtime/lua/vim/_init_packages.lua
@@ -42,8 +42,11 @@ function vim._load_package(name)
   return nil
 end
 
--- Insert vim._load_package after the preloader at position 2
-table.insert(package.loaders, 2, vim._load_package)
+-- TODO(bfredl): dedicated state for this?
+if vim.api then
+  -- Insert vim._load_package after the preloader at position 2
+  table.insert(package.loaders, 2, vim._load_package)
+end
 
 -- builtin functions which always should be available
 require('vim.shared')
@@ -78,6 +81,6 @@ function vim.empty_dict()
 end
 
 -- only on main thread: functions for interacting with editor state
-if not vim.is_thread() then
+if vim.api and not vim.is_thread() then
   require('vim._editor')
 end
diff --git a/runtime/lua/vim/filetype.lua b/runtime/lua/vim/filetype.lua
index 9293c828b8..8144731b09 100644
--- a/runtime/lua/vim/filetype.lua
+++ b/runtime/lua/vim/filetype.lua
@@ -226,6 +226,7 @@ local extension = {
   hook = function(path, bufnr)
     return M.getlines(bufnr, 1) == '[Trigger]' and 'conf'
   end,
+  nmconnection = 'confini',
   mklx = 'context',
   mkiv = 'context',
   mkii = 'context',
@@ -331,6 +332,7 @@ local extension = {
   am = 'elf',
   exs = 'elixir',
   elm = 'elm',
+  lc = 'elsa',
   elv = 'elvish',
   ent = function(path, bufnr)
     return require('vim.filetype.detect').ent(bufnr)
@@ -383,6 +385,7 @@ local extension = {
   ['m4gl'] = 'fgl',
   ['4gl'] = 'fgl',
   ['4gh'] = 'fgl',
+  fir = 'firrtl',
   fish = 'fish',
   focexec = 'focexec',
   fex = 'focexec',
@@ -567,6 +570,7 @@ local extension = {
   libsonnet = 'jsonnet',
   jsp = 'jsp',
   jl = 'julia',
+  kdl = 'kdl',
   kv = 'kivy',
   kix = 'kix',
   kts = 'kotlin',
@@ -1461,6 +1465,7 @@ local filename = {
   ['Pipfile.lock'] = 'json',
   ['.firebaserc'] = 'json',
   ['.prettierrc'] = 'json',
+  ['.stylelintrc'] = 'json',
   ['.babelrc'] = 'jsonc',
   ['.eslintrc'] = 'jsonc',
   ['.hintrc'] = 'jsonc',
@@ -1696,6 +1701,7 @@ local filename = {
   fglrxrc = 'xml',
   ['/etc/blkid.tab'] = 'xml',
   ['/etc/blkid.tab.old'] = 'xml',
+  ['.clangd'] = 'yaml',
   ['.clang-format'] = 'yaml',
   ['.clang-tidy'] = 'yaml',
   ['/etc/zprofile'] = 'zsh',
diff --git a/runtime/lua/vim/treesitter/language.lua b/runtime/lua/vim/treesitter/language.lua
index c92d63b8c4..8634e53b7b 100644
--- a/runtime/lua/vim/treesitter/language.lua
+++ b/runtime/lua/vim/treesitter/language.lua
@@ -6,7 +6,7 @@ local M = {}
 ---
 --- Parsers are searched in the `parser` runtime directory, or the provided {path}
 ---
----@param lang string Language the parser should parse
+---@param lang string Language the parser should parse (alphanumerical and `_` only)
 ---@param path (string|nil) Optional path the parser is located at
 ---@param silent (boolean|nil) Don't throw an error if language not found
 ---@param symbol_name (string|nil) Internal symbol name for the language to load
@@ -16,13 +16,19 @@ function M.require_language(lang, path, silent, symbol_name)
     return true
   end
   if path == nil then
-    local fname = 'parser/' .. vim.fn.fnameescape(lang) .. '.*'
+    if not (lang and lang:match('[%w_]+') == lang) then
+      if silent then
+        return false
+      end
+      error("'" .. lang .. "' is not a valid language name")
+    end
+
+    local fname = 'parser/' .. lang .. '.*'
     local paths = a.nvim_get_runtime_file(fname, false)
     if #paths == 0 then
       if silent then
         return false
       end
-
       error("no parser for '" .. lang .. "' language, see :help treesitter-parsers")
     end
     path = paths[1]