{
      "name": "agentic-commerce-convergence",
      "domain": "Agent Economy",
      "title": "Agentic Commerce Convergence",
      "description": "Binds one agent-run transaction across three independent agentic-commerce layers into a single hash-anchored composite: UCP cart/checkout discovery, ACP checkout conformance, and the AP2 payment mandate. UCP composes with AP2 rather than competing with it; this chain evidences that composition as one dated receipt.",
      "composer_url": "https://ainumbers.co/chaingraph/chains/agentic-commerce-convergence.html",
      "export_capability": ["json"],
      "steps": [
        {
          "tool_id": "art-564-ucp-checkout-payload-lint",
          "handoff": "Produces UCP cart/checkout resource conformance (CONFORMANT / NONCONFORMANT / UNKNOWN_VERSION) against the pinned v2026-04-08 schema, evidencing the discovery/cart layer of this declared transaction; each step keeps its own verdict scope, never merged into a single cross-layer determination"
        },
        {
          "tool_id": "art-12-acp-checkout-conformance-validator",
          "handoff": "Produces ACP checkout-session conformance findings over the same caller-declared amount/currency/merchant identity fields, evidencing the checkout layer of this declared transaction"
        },
        {
          "tool_id": "art-01-ap2-mandate-chain-validator",
          "handoff": "AP2 mandate-chain integrity determination over the same caller-declared amount/currency/merchant identity fields, closing the composite as the payment-authorization layer; terminal stage"
        }
      ]
    }