llms.txt is not empty
An empty llms.txt file is worse than no file at all — it tells agents the site authors are aware of the standard and have explicitly nothing to say. Real content lets agents find your docs.
How the check decides
After locating llms.txt, the check trims whitespace from the body and asserts the result is non-empty. Returns N/A if no llms.txt was found at all.
How to implement it
Put real content in your llms.txt — at minimum a heading and one or more linked pages. The format is markdown-flavoured, so headings, bullet lists, and link syntax all work.
Pass
# Example Docs
- [Install](https://example.com/docs/install.md)
- [Quickstart](https://example.com/docs/quickstart.md)
Fail
(A file that exists but contains only whitespace.)