What is llms.txt?
A guide to the llms.txt convention for making websites easier for LLMs and AI agents to consume.
The short version
llms.txt is a plain-text file served at /llms.txt that gives an LLM a concise, structured summary of a site or product: what it does, key pages, and how content is organized — similar in spirit to robots.txt, but written for language models instead of crawlers.
llms.txt vs llms-full.txt
/llms.txt is a short index — think of it like a table of contents. Some sites also publish /llms-full.txt, a longer document with more detail, terminology, and API references for deeper agent context.
See it in action
This directory publishes its own /llms.txt and /llms-full.txt. Every listing also tracks whether the tool itself publishes an llms.txt file.