nvim-lspconfig/lua/lspconfig/configs/harper_ls.lua

-- !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
-- This config is DEPRECATED.
-- Use the configs in `lsp/` instead (requires Nvim 0.11).
--
-- ALL configs in `lua/lspconfig/configs/` will be DELETED.
-- They exist only to support Nvim 0.10 or older.
-- !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
return {
  default_config = {
    cmd = { 'harper-ls', '--stdio' },
    filetypes = {
      'c',
      'cpp',
      'cs',
      'gitcommit',
      'go',
      'html',
      'java',
      'javascript',
      'lua',
      'markdown',
      'nix',
      'python',
      'ruby',
      'rust',
      'swift',
      'toml',
      'typescript',
      'typescriptreact',
      'haskell',
      'cmake',
      'typst',
      'php',
      'dart',
      'clojure',
    },
    root_dir = function(fname)
      return vim.fs.dirname(vim.fs.find('.git', { path = fname, upward = true })[1])
    end,
    single_file_support = true,
  },
  docs = {
    description = [[
https://github.com/automattic/harper

The language server for Harper, the slim, clean language checker for developers.

See our [documentation](https://writewithharper.com/docs/integrations/neovim) for more information on settings.

In short, they should look something like this:
```lua
lspconfig.harper_ls.setup {
  settings = {
    ["harper-ls"] = {
      userDictPath = "~/dict.txt"
    }
  },
}
```
    ]],
  },
}