The llms.txt file is an emerging convention used to
provide a machine-readable summary of a website's content, specifically designed
for LLMs and AI agents.
Without this file, agents may spend more time crawling the site to understand its high-level structure and primary content.
How the llms.txt audit works
Lighthouse flags the pages if a server error occurs when attempting to retrieve
the llms.txt file. If the file is not provided by the server (resulting in a
404), the audit is marked as Not Applicable (N/A), as providing the file is
optional at the moment.
How to fix
Create an llms.txt file and place it in the root directory of your website
(for example, https://example.com/llms.txt). The file should follow the llms.txt
specification and provide a concise Markdown summary of
your site's purpose and key links.