Started reading the BB book this morning and saw the https://book.babashka.org/#_running_a_script and decided to port it to YS for fun:

#!/usr/bin/env ys-0

# require babashka::http-client: => http

defn main(url=nil file=nil):
  when-not (url && file):
    say: 'Usage: <url> <file>'
    System/exit: 1
  write-html file: url.get-url().body

defn get-url(url):
  say: "Downloading url: $url"
  http/get: url

defn write-html(file html):
  say: "Writing file: $file"
  spit file: html