--- schema: 1 type: video title: 'The Agentic Commerce Stack — Ahnaf Prio, Best Buy' description: >- Add a second unit of the same item to your cart and, to you, nothing much happened. To the merchant that is a second line item on the same SKU. Ahnaf Prio's argument is that agentic shopping breaks on exactly these unglamorous distinctions, which is why roughly 45% of sessions on the major assistants already touch shopping while the first wave of agents mostly failed at it. Those took screenshots, read the DOM and filled forms, and they were slow and brittle. From the merchant side an agent driving a browser trips every fraud alarm there is, so it often died at the payment step. What replaced it is a pile of acronyms he untangles one at a time: MCP for tool access, A2A so a customer agent and a merchant agent can talk, then two competing commerce primitives in ACP from OpenAI and UCP from Google, and AP2 for payment mandates that carry an authorizing party, a spend ceiling and a revocation URL. He runs the whole loop live through Ginny, his orange tabby recast as a bakery agent on Cerebras at 3,000 tokens per second, with an inspector showing every call and checkout state transition. Merchants push a product feed instead of answering catalog searches, because m merchants times n products does not scale. He also tries to haggle a discount code out of his own cat, which sets up the real lesson. Chipotle's agent got used to answer programming questions. Write evals for behavior, protocol compliance and latency, or play whack a mole in production. Speaker info: - https://linkedin.com/in/ahnafy - https://github.com/ahnafyy Timestamps: 0:00 - Figuring out what agentic commerce means at Best Buy 1:28 - Shopping is 45% of agent sessions 3:08 - Why screenshot and DOM agents failed 4:56 - Why merchants needed ACP and UCP 6:11 - The acronym map: MCP, A2A, ACP, UCP, AP2 8:18 - Product feeds instead of catalog search 10:01 - Payments today, and what AP2 adds 10:50 - Demo: Ginny the bakery agent 13:30 - AP2 tokens, and the same flow under ACP 16:28 - Evals, Chipotle, and whack a mole 19:08 - The template, eval starters and catalog sync --- Watch along with the corrected transcript, summary, timestamps and resources on this talk's official AIE page: https://ai.engineer/talks/G7cgLjZtmMU-youtube-1f984b7608c05ae2a33b Join our upcoming AI Engineer conferences (see https://ai.engineer landing page): - AIEi Shanghai, November 5–6 — the first for meeting top Chinese labs and engineers - AIE CODE in SF, November 10–12 — the top AI Coding conference returns - AIEi Sydney, December 7–8 — the first AIEi run alongside NeurIPS 2026 in Sydney --- canonical: >- https://liquidgold.cc/channel/aidotengineer/explore/video/the-agentic-commerce-stack-ahnaf-prio-best-buy-a812eb43c6b6 markdown: >- https://liquidgold.cc/channel/aidotengineer/video/the-agentic-commerce-stack-ahnaf-prio-best-buy-a812eb43c6b6.md llms: null parent: 'https://liquidgold.cc/channel/aidotengineer.md' channel: aidotengineer updated: '2026-10-24T04:38:12.406Z' language: null children: [] videoId: G7cgLjZtmMU durationSeconds: 1238 publishedAt: '2026-08-27T15:00:34.000Z' searchChunks: - ordinal: 0 text: null startSeconds: 97 endSeconds: 107 watch: 'https://liquidgold.cc/watch/G7cgLjZtmMU?t=97' heldReason: rights - ordinal: 1 text: null startSeconds: 107 endSeconds: 195 watch: 'https://liquidgold.cc/watch/G7cgLjZtmMU?t=107' heldReason: rights - ordinal: 2 text: null startSeconds: 195 endSeconds: 207 watch: 'https://liquidgold.cc/watch/G7cgLjZtmMU?t=195' heldReason: rights - ordinal: 3 text: null startSeconds: 207 endSeconds: 299 watch: 'https://liquidgold.cc/watch/G7cgLjZtmMU?t=207' heldReason: rights - ordinal: 4 text: null startSeconds: 207 endSeconds: 299 watch: 'https://liquidgold.cc/watch/G7cgLjZtmMU?t=207' heldReason: rights - ordinal: 5 text: null startSeconds: 299 endSeconds: 311 watch: 'https://liquidgold.cc/watch/G7cgLjZtmMU?t=299' heldReason: rights - ordinal: 6 text: null startSeconds: 378 endSeconds: 388 watch: 'https://liquidgold.cc/watch/G7cgLjZtmMU?t=378' heldReason: rights - ordinal: 7 text: null startSeconds: 502 endSeconds: 513 watch: 'https://liquidgold.cc/watch/G7cgLjZtmMU?t=502' heldReason: rights - ordinal: 8 text: null startSeconds: 513 endSeconds: 604 watch: 'https://liquidgold.cc/watch/G7cgLjZtmMU?t=513' heldReason: rights - ordinal: 9 text: null startSeconds: 616 endSeconds: 650 watch: 'https://liquidgold.cc/watch/G7cgLjZtmMU?t=616' heldReason: rights - ordinal: 10 text: null startSeconds: 662 endSeconds: 818 watch: 'https://liquidgold.cc/watch/G7cgLjZtmMU?t=662' heldReason: rights - ordinal: 11 text: null startSeconds: 830 endSeconds: 994 watch: 'https://liquidgold.cc/watch/G7cgLjZtmMU?t=830' heldReason: rights - ordinal: 12 text: null startSeconds: 1006 endSeconds: 1154 watch: 'https://liquidgold.cc/watch/G7cgLjZtmMU?t=1006' heldReason: rights - ordinal: 13 text: null startSeconds: 1006 endSeconds: 1154 watch: 'https://liquidgold.cc/watch/G7cgLjZtmMU?t=1006' heldReason: rights - ordinal: 14 text: null startSeconds: 1006 endSeconds: 1154 watch: 'https://liquidgold.cc/watch/G7cgLjZtmMU?t=1006' heldReason: rights - ordinal: 15 text: null startSeconds: 1165 endSeconds: 1238 watch: 'https://liquidgold.cc/watch/G7cgLjZtmMU?t=1165' heldReason: rights --- # The Agentic Commerce Stack — Ahnaf Prio, Best Buy Add a second unit of the same item to your cart and, to you, nothing much happened. To the merchant that is a second line item on the same SKU. Ahnaf Prio's argument is that agentic shopping breaks on exactly these unglamorous distinctions, which is why roughly 45% of sessions on the major assistants already touch shopping while the first wave of agents mostly failed at it. Those took screenshots, read the DOM and filled forms, and they were slow and brittle. From the merchant side an agent driving a browser trips every fraud alarm there is, so it often died at the payment step. What replaced it is a pile of acronyms he untangles one at a time: MCP for tool access, A2A so a customer agent and a merchant agent can talk, then two competing commerce primitives in ACP from OpenAI and UCP from Google, and AP2 for payment mandates that carry an authorizing party, a spend ceiling and a revocation URL. He runs the whole loop live through Ginny, his orange tabby recast as a bakery agent on Cerebras at 3,000 tokens per second, with an inspector showing every call and checkout state transition. Merchants push a product feed instead of answering catalog searches, because m merchants times n products does not scale. He also tries to haggle a discount code out of his own cat, which sets up the real lesson. Chipotle's agent got used to answer programming questions. Write evals for behavior, protocol compliance and latency, or play whack a mole in production. Speaker info: - https://linkedin.com/in/ahnafy - https://github.com/ahnafyy Timestamps: 0:00 - Figuring out what agentic commerce means at Best Buy 1:28 - Shopping is 45% of agent sessions 3:08 - Why screenshot and DOM agents failed 4:56 - Why merchants needed ACP and UCP 6:11 - The acronym map: MCP, A2A, ACP, UCP, AP2 8:18 - Product feeds instead of catalog search 10:01 - Payments today, and what AP2 adds 10:50 - Demo: Ginny the bakery agent 13:30 - AP2 tokens, and the same flow under ACP 16:28 - Evals, Chipotle, and whack a mole 19:08 - The template, eval starters and catalog sync --- Watch along with the corrected transcript, summary, timestamps and resources on this talk's official AIE page: https://ai.engineer/talks/G7cgLjZtmMU-youtube-1f984b7608c05ae2a33b Join our upcoming AI Engineer conferences (see https://ai.engineer landing page): - AIEi Shanghai, November 5–6 — the first for meeting top Chinese labs and engineers - AIE CODE in SF, November 10–12 — the top AI Coding conference returns - AIEi Sydney, December 7–8 — the first AIEi run alongside NeurIPS 2026 in Sydney --- Canonical: https://liquidgold.cc/channel/aidotengineer/explore/video/the-agentic-commerce-stack-ahnaf-prio-best-buy-a812eb43c6b6 · Channel: [AI Engineer](https://liquidgold.cc/channel/aidotengineer.md) > Search chunk text is held until public-source provenance is verified. ## Document chunks > Missing: no stored document chunks are available.