llms.txt
llms.txt is a plain-text Markdown file at the root of a website that tells language models what the site is and links to the pages worth reading, in a form that is cheap to fetch and parse.
The format, proposed at llmstxt.org, is an H1 with the site name, a one-line summary in a blockquote, and sections of links with a short note on each. It sits at /llms.txt, next to robots.txt.
It does not replace a sitemap or good HTML. It gives an assistant a curated starting point, so it reaches the docs or the pricing page directly instead of crawling the navigation.
Where Stunt Double fits
This site publishes one at /llms.txt, generated from the same registries as the pages it lists. It is one of the cheapest agent experience improvements a site can make.
Related terms
- Agent experience (AX)Agent experience is how well an AI agent can use a product on someone’s behalf: find what it needs, understand the page, and finish the task without a person stepping in.
- Model Context Protocol (MCP)The Model Context Protocol is an open standard for connecting AI assistants to tools and data. A service exposes an MCP server, and any MCP client, such as Claude or Cursor, can call its tools.