return {
  "nvim-neo-tree/neo-tree.nvim",
  opts = {
    window = {
      width = 40,
    },
    filesystem = {
      window = {
        mappings = {
          ["<C-l>"] = function(state)
            local node = state.tree:get_node()

            if vim.fn.fnamemodify(node.path, ":e") == "opto" then
              vim.cmd.Optolith()
              return
            end

            os.execute(string.format('xdg-open "%s" &> /dev/null &', node.path))
          end,
        },
      },
    },
  },
}