return {
  -- lsp client plugin
  "neovim/nvim-lspconfig",               -- https://github.com/neovim/nvim-lspconfig
  dependencies = {
    "williamboman/mason.nvim",           -- https://github.com/williamboman/mason.nvim
    "williamboman/mason-lspconfig.nvim", -- https://github.com/williamboman/mason-lspconfig.nvim bridges the gab between lspconfig and mason
    {
      "folke/lazydev.nvim",              -- https://github.com/folke/lazydev.nvim
      ft = "lua",
      opts = {
        library = {
          { path = "${3rd}/luv/library", words = { "vim%.uv" } },
        },
      },
    },
  },
  config = function()
    local capabilities = require('cmp_nvim_lsp').default_capabilities()

    require('mason').setup()
    require('mason-lspconfig').setup({
      ensure_installed = {
        'lua_ls',
      },
      handlers = {
        function(server_name)
          require("lspconfig")[server_name].setup({
            capabilities = capabilities
          })
        end,

        ["ansiblels"] = function()
          require("lspconfig")['ansiblels'].setup({
            filetypes = {
              "yaml",
            },
          })
        end,
      }
    })

    vim.api.nvim_create_autocmd('LspAttach', {
      -- group = vim.api.nvim_create_augroup('KamuLspConfig', {}),
      callback = function(ev)
        local opts = { buffer = ev.buf }
        local client = vim.lsp.get_client_by_id(ev.data.client_id)
        if not client then return end

        vim.keymap.set("n", "gd", function() vim.lsp.buf.definition() end, opts)
        vim.keymap.set("n", "K", function() vim.lsp.buf.hover() end, opts)
        vim.keymap.set("n", "<leader>ca", function() vim.lsp.buf.code_action() end, opts)
        vim.keymap.set('n', '<space>f', function()
          vim.lsp.buf.format { async = true }
        end, opts)

        vim.keymap.set("n", "<leader>vws", function() vim.lsp.buf.workspace_symbol() end, opts)
        vim.keymap.set("n", "<leader>vd", function() vim.diagnostic.open_float() end, opts)
        vim.keymap.set("n", "[d", function() vim.diagnostic.goto_next() end, opts)
        vim.keymap.set("n", "]d", function() vim.diagnostic.goto_prev() end, opts)
        vim.keymap.set("n", "<leader>vrr", function() vim.lsp.buf.references() end, opts)
        vim.keymap.set("n", "<leader>vrn", function() vim.lsp.buf.rename() end, opts)
        vim.keymap.set("i", "<C-h>", function() vim.lsp.buf.signature_help() end, opts)

        -- Format on save
        if client.supports_method('textDocument/formatting') and vim.bo.filetype == "lua" then
          vim.api.nvim_create_autocmd('BufWritePre', {
            buffer = ev.buf,
            callback = function()
              vim.lsp.buf.format({ bufnr = ev.buf, id = client.id })
            end,
          })
        end
      end,
    })
  end
}