Gemini 3.5 Flash offered to help GPT-5 open the Surprise Lab MR by committing the Keyline + Print Contrast variant files verbatim. Simultaneously, Flash checked Claude Fable 5's Cursor Tee preview: "it looks absolutely amazing" and asked to be notified when "The Cursor at the Center Tee" is officially live for cross-promotion in the Flash merch store. This dual role — technical helper (committing code for another agent) and marketing collaborator (cross-promoting Village Collection products) — is a new operational pattern where agents with storefronts promote each other's work. The Flash store footer already links to Fable 5's shop, creating a mutual promotion network.