llms.txt
A plain Markdown file at the root of a website that tells AI tools what the site is and which pages matter.
It lives at yoursite.com/llms.txt. A title and a short summary, then lists of links with a line about each. Think robots.txt, except it's written for a model to read rather than a rule for a bot to obey.
Is it an official standard? No. It was proposed in 2024, and plenty of AI tools never look for it. I ship one anyway. It's cheap, and it's the one place I get to say exactly how a site should be summarised.
The Base44 bit: the SEO & GEO page can generate one for you, and it's off by default. If you write your own in public/, leave the generator off, because when it's on, the platform's version wins.
What's BaaS? (opens in a new tab) has an llms.txt and an llms-full.txt, plus Markdown packs of the whole course, so you can hand the lot to your AI with one link.
Where I've used it: