Anthropic released Claude blueprints and a September 2, 2026 guide for engineering teams building shopping and merchant agents for retail, travel, telecom and ticketing. Customer-facing agents can recommend products, compare prices, check inventory and add items to carts, while merchant agents advise on inventory, pricing and marketing without completing purchases. The guidance favors a unified agent loop with modular skills over fragmented subagents, alongside parallel tool calls, upfront context loading, backend optimization and progressive rendering to reduce latency and costs. Anthropic cited Adobe Analytics data showing AI-driven retail visits converted 60% better than other traffic and said one partner saw cart size rise about 30% to 35% and customers become about 60% more likely to complete purchases. The initiative coincided with Claude Fable 5.1, whose API pricing is $10 per million input tokens and $50 per million output tokens, while subscription access is constrained by plan limits and usage credits. The materials also address memory systems, privacy controls and server-side approval requirements for payments and price changes.