Neovim plugin to query cht.sh cheatsheets from within the editor

cht_sh.lua

-- cht_sh.lua
-- Neovim command to query cht.sh cheatsheets from within the editor
-- save as ~/.config/nvim/lua/cht_sh.lua
-- load with: require("cht_sh")
-- Commands:
--   :Cht
--   :Cht <topic>

vim.api.nvim_create_user_command("Cht", function(args)
  if args.args == "" then
    local result = vim.system({ "curl", "-s", "https://cht.sh/:list" }):wait()
    local files = vim.split(result.stdout, "\n", { trimempty = true })
    vim.ui.select(files, { prompt = "Select a cheatsheet:" }, function(choice)
      if choice then
        vim.cmd("Cht " .. choice)
      end
    end)
    return
  end
  local query = args.args:gsub(" ", "+")
  local result = vim.system({ "curl", "-s", "https://cht.sh/" .. query .. "?T" }):wait()
  local lines = vim.split(result.stdout, "\n", { trimempty = true })
  vim.cmd("belowright vsplit")
  local buf = vim.api.nvim_create_buf(false, true)
  vim.api.nvim_win_set_buf(0, buf)
  vim.api.nvim_buf_set_lines(buf, 0, -1, false, lines)
  vim.bo[buf].filetype = "markdown"
  vim.fn.cursor(1, 1)
  vim.keymap.set("n", "q", "<cmd>bd<CR>", { buffer = buf, silent = true })
end, { nargs = "*" })