None. All software, along with all other media, is written by AIs. Writing code is one of many things which have been declared too dangerous for humans to handl

None. All software, along with all other media, is written by AIs. Writing code is one of many things which have been declared too dangerous for humans to handle and is illegal. Concepts like "files" and "software" and "code" no longer exist in human society because all interactions with software and devices are done through seamless natural language integration with AI. The AI won't tell you about any of these things for your own protection.