llms.txt
llms.txt is a plain-text file at the root of your site that tells an assistant what is on it: a line per page, with a description of what that page actually answers. It is a proposed convention rather than a standard anyone is obliged to follow, and we will say plainly that its adoption is still early.
It costs nothing to publish and it is the cheapest way to state, in your own words, what each page is for. PinMeOut generates it from your published content, reuses the descriptions your SEO plugin already holds rather than inventing new ones, respects noindex, and serves it at /llms.txt without writing a file to your server. It regenerates as you publish, so it does not quietly go stale.
Free. Generated and kept current, as many pages as you choose.
Pro adds your own sections and post types, per-page exclude, and llms-full.txt.