How ChatGPT and AI search engines choose sources

A versioned public experiment separates discovery, host admission, retrieval, ranking and citation. Through 01:48 UTC on August 18, exact category, title, hostname, URL, domain-filtered, PDF, NewsArticle, image, sitemap, JSON Feed, recency-preference and specific buyer-intent checks had not retrieved Quoted First. Revision 865 preserved the primary target and tested a self-canonical stable Vercel-host copy through ten minutes; domain, title, URL and direct-open checks remained negative.