Lectures

In this lecture we build a “map of the terrain” of AI‑commerce: how it differs from classic e‑commerce, why dialogue becomes the primary interface, and what role OpenAI/ACP specifications (Product Feed, Agentic Checkout, Delegated Payment) play in real production checkout. We will break down areas of responsibility (ChatGPT / merchant / PSP / user), walk through an end‑to‑end chat purchase scenario, and see how GiftGenius evolves from a discovery assistant into a full‑fledged commerce application with a clear architecture and TS models of steps.

Why a merchant needs a Product Feed in the ChatGPT ecosystem: how the feed becomes the “single source of truth” for search, recommendations, and preparing checkout_session; why in a feed the SKU matters more than the “product”; which fields are critical for UX (price, currency, availability, links, media); how to manage enable_search/ enable_checkout modes; how to think about locales and regions; and why data quality and policy (including prohibited products) determine whether Instant Checkout will take off.

We break down the role of a ChatGPT merchant in AI commerce: how a merchant differs from “just an app”, how onboarding via the ChatGPT Merchants portal works, why you need a Product Feed, and why Instant Checkout requires a separate ACP integration (Agentic Checkout + Delegated Payment). We also pin down areas of responsibility (catalog, orders, policy, money) and map everything to the GiftGenius architecture: merchant configuration, the MCP tool get_merchant_info, and UI mode switching ( enable_checkout, production vs dev). We finish with a hands‑on mini‑assignment and a review of common pitfalls.

We unpack ACP as a commerce-integration standard for LLM platforms: how it differs from “just a REST API”, which specifications it comprises (Product Feed, Agentic Checkout, Delegated Payment), what the checkout_session lifecycle looks like, which statuses matter ( not_ready_for_payment, ready_for_payment, completed, canceled), why idempotency via Idempotency-Key is needed, and how Instant Checkout applies the Shared Payment Token ( SPT) using Stripe and the GiftGenius learning project as examples.

In this lecture, we assemble a commerce integration into a cohesive system: we connect the Product Feed, MCP tools, and the ACP backend (Agentic Checkout), examine the roles of the widget (Apps SDK), the payment provider, and webhooks, design a single source of truth for skuId, and lock in two end‑to‑end flows — “Feed only + ACP” and “ App + widget + requestCheckout.”