Releasesby Ibis
New `owner_type` field for metafield declarations in Checkout and Customer Account UI extensions, required in 2027-01
Update2 days agoUnverifiedAdded Oct 10, 2026
Starting with API version 2026-10 , Checkout and Customer Account UI extensions can specify an owner_type for each metafield declaration in shopify.extension.toml . Starting with API version 2027-01 , owner_type is required for every metafield declaration, and deployments without it will be blocked.
Topics: Developer tools, Performance
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In POS UI extensions API version 2026-10 , Cart API mutations reject when Shopify POS doesn't confirm that the cart changed. In earlier versions these mutations resolve whether or not POS applied the write. This is a breaking change for apps that adopt 2026-10 , and those apps need to handle a rejected promise on every cart mutation they call.
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Per-customer request limit for the Customer Account API
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Downgrade app access scopes from write to read
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Rollouts queries and webhooks in the Admin GraphQL API
Summary Apps can now discover Rollouts, inspect their schedules, traffic allocation, and resource changes, and receive notifications when they change. These capabilities help apps understand and respond to coordinated launches, experiments, and temporary events across discounts, catalogs, themes, and checkout and accounts configurations.
Also shipped on Oct 8, 2026
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