No. To our knowledge, Lighthouse Agentic Browsing is not a Google Search ranking factor.
Two layers should be separated. Google Search says sites do not need to add llms.txt, Markdown or special machine files to be eligible for AI features in Search. Lighthouse, on the other hand, adds experimental audits that check selected machine-interaction signals.
Those audits can become very useful for web teams, agencies, developers and organizations preparing their sites for agents. But they should not be presented as a ranking promise.
At Pagup, the right use is this: Lighthouse is an input signal. The agentic readiness audit then verifies real journeys, accessibility, forms, CTAs, stability, proof and governance.
In other words: it is not a magic SEO factor, but it is a serious maturity indicator for the agentic web.