It validates your /llms.txt against the llmstxt.org structure, checks whether llms-full.txt exists, and diffs the file against your sitemap to find important pages it never links.

llms-full.txt is the companion file that carries the complete page list, while llms.txt holds the curated summary. The convention expects both.

Start from the free llms.txt generator and re-issue the file, then confirm every important page from your sitemap is either linked or deliberately excluded.