What is llms.txt?

llms.txt is a plain markdown file at the root of your website — https://your-site.com/llms.txt — that tells AI systems what your site is and where its important pages are. Think of it as a sitemap written for readers rather than crawlers: a title, a one-paragraph summary, and a curated list of links with one-line descriptions.

The format is deliberately simple:

# Your Company

> One paragraph: what you do, for whom, from where.

## Products

- [Product A](https://your-site.com/a): what it does, in one line
- [Product B](https://your-site.com/b): what it does, in one line

Its companion llms-full.txt inlines the actual content of those pages, for systems that want the text without crawling.

Two honest caveats. First, adoption is voluntary — some AI systems read it, none are obliged to. It is cheap insurance, not a guarantee. Second, a stale llms.txt is worse than none: it teaches agents wrong facts with high confidence. That is why Sichta treats it as one of 17 checks and regenerates it when your content changes, rather than as a file you generate once and forget.