Plain-language explainer
What is llms.txt?
llms.txt is a proposed plain-text file that lists a site’s most important pages for AI tools. It is not an official standard, and support varies.
The work to plan together
A scope shaped around this requirement.
- Placed at the site root like robots.txtScope
- Lists key pages with short descriptionsReview
- Does not replace sitemaps or good contentCheck
The useful starting point
llms.txt is a proposed way to offer an overview and links intended for language-model tools. It is not a replacement for robots.txt, a sitemap or indexable HTML. Its presence is not a requirement for Google AI search features.
What to review
- Placed at the site root like robots.txt
- Lists key pages with short descriptions
- Does not replace sitemaps or good content
- Low effort, uncertain benefit
A practical example
A small file may link to the core service and documentation pages, but those pages still need to be available and useful to people.
The numbers or scenarios in this guide are illustrative. They are not claimed Tangensys client results.
What to avoid or interpret carefully
Do not promise improved AI rankings from the file. Treat it as an optional information aid and keep standard discovery controls accurate.
Turn the guide into a small action plan
Record the starting point
Use the example above to identify what is happening in your own website, campaign or process. Save the evidence before changing it.
Choose the first check
Start with the relevant items in the review list. Assign an owner, identify required access and write down what you expect to learn.
Review before expanding
Compare the result with the original evidence. Keep useful changes, explain uncertainty and investigate problems before increasing scope.
Keep optional information aids separate from discovery controls
An optional overview file can organise links for tools that choose to use it. That role differs from crawl permissions, indexing controls or a sitemap. It should not be sold as a universal requirement for AI search visibility.
Useful contents
If maintained, use concise descriptions and links to accurate core information. An index of stale pages is not useful simply because it has a special filename.
Other controls
Review robots rules, indexable HTML and the actual sitemap separately. Each has a different function. Do not replace working discovery or privacy controls with an optional summary file.
Maintenance decision
Name an owner and update process. If the file repeats information the team cannot maintain, reconsider whether it adds value. Keep any effect claim within the evidence actually available.
How to interpret this guidance
Google’s AI search guidance does not require this file. Treat it as an optional information aid, and verify current support for the intended tool before making implementation promises.
Will adding llms.txt guarantee citations?
No. An optional file cannot force a platform to use or cite your pages. Useful source content and accurate discovery controls still matter, and any claimed effect needs a disclosed observation method.
Can Tangensys help with the next step?
Yes. Share your website, goal and the issue you are investigating. We can discuss the relevant service and provide a custom quote within 2 working days.
Related reading and services
Let’s agree the right next step.
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