A map of your site, written for the agents that read it.
llms.txt points the other way from AGENTS.md: it goes on your website, not in your repo, and it is for agents reading your documentation rather than agents writing your code. The problem it solves is that a web page buries its actual content in navigation, markup and scripts, and an agent fetching it wastes most of its context window on everything that is not the answer. So you publish one Markdown file at /llms.txt — a title, a short summary, then lists of links to clean Markdown versions of your pages — and an agent reads that first and follows only the links it needs. The proposal is Jeremy Howard's, now in its second version, and OpenAI, Anthropic and Google all publish one for their own developer docs; Chrome's Lighthouse checks whether you have one. Be clear-eyed about what it is, though: a convention, not a standard anyone is obliged to honour. It helps an agent you have pointed at your docs. It is not a search ranking trick.
Pairs well with
Key info
- Pricing
- Free
- Category
- Utilities
- Best for
- Intermediate
- What it is
- A Markdown file at /llms.txt on your website
- Holds
- A title, a one-line summary, then lists of links to clean Markdown pages
- Proposed by
- Jeremy Howard; version 2 published August 2026
- Who publishes one
- OpenAI, Anthropic and Google, for their own developer docs
- Also
- Chrome's Lighthouse checks for one
- Watch out
- A convention, not a standard — no crawler is obliged to read it