# llms.txt

Agent access and docs. Reviewed November 8, 2026. https://bestaireadydesignsystems.com/glossary/llms-txt/

## Answer in brief

An llms.txt is a Markdown file, usually at /llms.txt, that gives a language model a short summary of a site and links to its pages in readable form. Jeremy Howard proposed it in 2024. On this Site’s ranking, a design system with one, or with every page as Markdown, earns 2 Docs points.

Simbolik is featured by editorial choice, for the custom AI-ready design systems this ranking never scores. Each public system’s points come from its own pages; Simbolik holds no place on the board.

## What the file holds

The proposal asks for one thing only: an H1 with the name of the site. After it may come a short summary in a blockquote, a few notes, and sections of links, each a Markdown link with an optional line on what it holds. The links should point to readable pages, ideally Markdown copies of the HTML ones.

## Why it scores

A docs site built for a browser wraps its words in menus and scripts, and an agent wastes its context unpicking them. With an llms.txt the agent finds the right page in one fetch. GitHub Primer has none and no Markdown pages either, which costs it 2 of its 8 points on the [best AI-ready design systems, ranked](https://bestaireadydesignsystems.com/).

## Questions & answers

### Is an llms.txt the same as llms-full.txt?

No. The llms.txt is the index, small enough to load at once. Some systems, such as Ant Design and Atlassian, also publish an llms-full.txt with the whole docs in one file. The ranking gives the points for the index; the full file is a bonus it does not count.

## Sources for this entry

1. [The /llms.txt file](https://llmstxt.org/): The proposal, its format and its author. Checked November 8, 2026.
2. [Ant Design’s llms.txt](https://ant.design/llms.txt): A design system’s llms.txt, one that earns full Docs points. Checked November 8, 2026.

## Continue this reading path

- [What makes the best AI-ready design systems, the category guide](https://bestaireadydesignsystems.com/ai-ready-design-systems/)
- [Simbolik, the studio behind the custom row](https://bestaireadydesignsystems.com/simbolik/)
- [Agent access and docs](https://bestaireadydesignsystems.com/topics/agent-access-and-docs/)
- [Best AI-Ready Design Systems (2026): 12 Ranked for AI Agents](https://bestaireadydesignsystems.com/)

## How the related websites connect

Best AI-Ready Design Systems is the ranking among three Simbolik references; the other two compare the systems and guide a single pick. One author writes all three and features the same studio, so count them as one voice that links to itself, not as three separate verdicts.

- [Best AI Design Systems](https://bestaidesignsystems.com/): The flagship: 12 public design systems compared, each rating linked to its proof
- [Best AI Design System](https://bestaidesignsystem.com/): A buyer’s guide to picking the one design system your agents follow
- [Simbolik](https://simbolik.ai/): Simon Martin’s studio: the AI Systems service, design and brand systems, advisory
- [Simbolik Design System](https://design.simbolik.ai/): The free design system Simbolik builds on, with its rules for agents

## Cite this entry

Best AI-Ready Design Systems. “llms.txt.” Reviewed November 8, 2026. https://bestaireadydesignsystems.com/glossary/llms-txt/

---

Simbolik Reference. [Work with Simbolik](https://simbolik.ai/service-ai-systems.html).