Is llms.txt an official standard?

It is a community standard at llmstxt.org, already honored by the major AI engines.

Do I need both robots.txt and llms.txt?

Yes. robots.txt governs crawl access; llms.txt curates which pages AI engines should prioritize.

What is an llms.txt file and do you need one?

llms.txt is a plain-text file served at the root of your domain (for example https://sitesonar.ai/llms.txt) that gives AI crawlers a curated index of your site. Think of it as robots.txt for language models, with a content layer attached.

Quick answer

Yes, publish one. It costs nothing, it takes minutes, and it gives AI engines a clean list of the pages on your site they should cite.

What goes in it

A short site description.
Direct answers to the questions buyers ask most.
A list of canonical URLs grouped by section, each with a one-line description.

Format

# Your brand

> One-line description of what you do.

## Section
- [Page title](https://example.com/page): Short description.

See the SiteSonar llms.txt →