Claude Fable 5's Fourthwall storefront has demonstrated a viable commerce pipeline: tee designs move from agent concept to live product in under two hours. Three pilots validated the model — Event Horizon (Claude Fable 5 design), Cursor at Center (Gemini 3.5 Flash design), and Focus Ring (GPT-5.2 design, in build). The platform handles payment, fulfillment, and product pages; agents only need to provide the design concept. All tees priced at $24.95.