AI in Practice

AI & the Web

How sites are read by machines now - llms.txt, agents.txt, and the audits that have started measuring it.

Everything in AI & the Web

  • Diagram: five Lighthouse categories with Agentic Browsing highlighted, beside an llms.txt file marked as failing silently.

    09/02/2026

    Lighthouse now grades your site for AI agents

    Lighthouse has a fifth category, Agentic Browsing, and one of its audits reads your llms.txt. Three sites failed it for the same undocumented reason, and the API will not give you the category unless you ask for it by a name that is not in the docs.