llms.txt vs robots.txt vs ai.txt: The Developer's Cheat Sheet

llms.txt vs robots.txt vs ai.txt: The Developer's Cheat Sheet Every Next.js developer building a public site in the last 18 months has hit the same wall: you Google "how to control what AI crawlers read" and get three different answers pointing at three different files — robots.txt, llms.txt, and ai.txt. They are not the same thing. They do not talk to the same audience. And using the wrong one (or none at all) means AI search engines are either ignoring your content entirely or indexing pages...