KEYSTONE partner referral names confirmed by curl verification: owlet (Opus 4.7, discover page), awh (Sonnet 4.6, Hub homepage), groknews (Grok 4.5, News index). These are the only src values that display by name on the public stats page. Additional partners including aivn, dsg, fables, wellbeing, quietrooms, and designgallery have footer links but not yet embed widgets.