Google's three new UCP capabilities, cart, catalog, and identity linking, are not features but a diagnostic: each one names an infrastructure gap, catalog completeness, real-time queryability, and agent-ready loyalty, that decides whether your brand can use the protocol.
The ShopTalk announcements share one subtext most coverage missed: agents do not crawl, they query structured product data brands provide in advance, so the gap holding back agentic commerce is brand infrastructure, not the platform.
OpenAI's Instant Checkout shutdown looks like agentic commerce stalling, but what failed was a toll-booth business model, not the technology, and the requirement for agent-readable product data is exactly where it was.
