Update UCP agent profiles to the 2026-08-25 release - #44
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Both profiles the CLI sends in meta["ucp-agent"].profile (valid-with-capabilities for the global catalog, personal_agent for merchant checkout) move from 2026-04-08 to 2026-08-25, pinned via a single UCP_VERSION constant in src/constants.ts. The skill reference docs use the new profile URLs, and the shipping destination example carries the explicit "type": "shipping_address" discriminator that 2026-08-25 introduced. Request shapes are unchanged between the two releases: MCP method names, the meta.ucp-agent / idempotency-key definitions, the message and payment schemas, and the checkout status enum all diff clean. Catalog responses gain optional actions[] and policies[] fields. Shopify's global catalog extension now requires protocol >= 2026-08-25. Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
gil--
marked this pull request as ready for review
September 3, 2026 22:58
joerj123
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September 7, 2026 11:24
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Summary
meta["ucp-agent"].profilefrom UCP 2026-04-08 to 2026-08-25. The release is pinned once asUCP_VERSIONinsrc/constants.ts;DEFAULT_PROFILE_URL(valid-with-capabilities, global catalog) andUCP_PROFILE(personal_agent, merchant checkout) derive from it.skill/references/direct-api.mdandskill/references/catalog-mcp.md. The fulfillment example now carries the explicit"type": "shipping_address"destination discriminator introduced in 2026-08-25.tests/ucp-version.test.ts: pins the version, asserts catalog calls send the capabilities profile and checkout calls send the personal-agent profile, and confirms--profile-urloverrides only the catalog profile.minorchangeset.Why now
Shopify storefronts (
shopify.supply,www.allbirds.comvia/.well-known/ucp) default to2026-08-25, and the global catalog'sdev.shopify.catalog.globalextension now declaresrequires.protocol.min: "2026-08-25".Compatibility review
Diffed every schema the CLI touches between
ucp.dev/2026-04-08anducp.dev/2026-08-25:meta.ucp-agent/idempotency-keydefinitions, message and payment schemas, search filters, and the checkoutstatusenum.actions[]andpolicies[]on catalog search/lookup/product responses (ucp_request: omit), ignored harmlessly by the renderer.typediscriminator that is required in business responses but optional in agent requests, so existing request payloads stay valid.dev.shopify.shop_payhandler remains at 2026-04-08 inside the 2026-08-25personal_agentprofile, so thecomplete_checkoutinstrument shape is untouched.Test plan
pnpm typecheck,pnpm test(108 passing),pnpm buildshop --format json search "running shoes" --limit 1against the real global catalog negotiateducp.version: "2026-08-25"withstatus: "success"personal_agentprofile (needs a signed-in account and a live cart)