What is llms.txt?
A proposed Markdown file at /llms.txt that gives AI models a short, curated map of a website: a title, a one-paragraph summary and lists of key links.
Proposed by Jeremy Howard in September 2024. The only required part is an H1 with the site or project name; then an optional blockquote summary, optional detail paragraphs, and H2 sections of [name](url): notes link lists. An H2 named "Optional" marks links an agent can skip when it needs a shorter context.
The proposal also suggests serving clean Markdown versions of important pages at the same URL with .md added. Some sites also publish a longer /llms-full.txt with full text.
Sources
Related terms
- Agent card (A2A)A JSON document, served at /.well-known/agent-card.json, that describes an AI agent for the Agent2Agent (A2A) protocol: its name, skills, interfaces, capabilities and authentication.
- Model Context Protocol (MCP)An open protocol, introduced by Anthropic in November 2024, that lets AI applications connect to external tools and data through a standard interface.