What it contains
A title, a one-line summary, a few notes, then sections of links with a short description of each — written in Markdown so both people and models can read it. Some sites also publish llms-full.txt, with the full text of those pages in one file.
What it does and does not do
It gives AI tools a map of what matters, instead of making them work it out from navigation and markup. It promises nothing: whether a given assistant or search engine reads it is up to that engine. It complements crawlable pages, a sitemap and structured data rather than replacing them.
Does your site need one?
If the site has content worth citing — service pages, guides, answers — it is a small, low-risk addition. This site publishes both files, generated from the same content as its pages, so they cannot drift out of date.
One item among several
In our growth work it sits under technical SEO, alongside information architecture and structured data.