Glossary /
llms.txt
A plain text file at the root of a website that tells AI systems what the site is and how to read it.
In more detail
Similar in purpose to robots.txt but for large language models, llms.txt declares your site's identity, key pages, and summary content in a format ChatGPT, Perplexity, Claude, and other AI systems can parse. Sites with a well-formed llms.txt are more likely to be cited accurately in AI-generated answers.