What is llms.txt?

llms.txt is a proposed standard (from Jeremy Howard / Answer.AI) for a Markdown file at your site root — /llms.txt — that gives large language models a curated, machine-friendly map of your site.

The format

The spec defines a strict ordering:

# Project Name          ← required (the only required line)

> One-sentence summary  ← optional blockquote

Optional intro text (no headings).

## Section name         ← optional H2 sections
- [Page title](https://example.com/page): short description
- [Another page](https://example.com/other)

## Optional
- [Less important page](https://example.com/extra)

The ## Optional section has special meaning: those links can be skipped when context is limited.

llms.txt vs llms-full.txt

• llms.txt — a concise index: links + descriptions, like a curated sitemap.
• llms-full.txt — the full text of your pages concatenated into one file, so an LLM can ingest everything in a single fetch.

Where to put it

Upload the file to your web root so it's served at https://yourdomain.com/llms.txt.

Do AI crawlers read it?

Adoption is still early — as of 2026 most major AI crawlers don't reliably fetch llms.txt yet. Treat it as low-effort future-proofing and as a ready-made context file for your own RAG or documentation search. See our FAQ for the honest details.