- Checkout metafields removed in API version 2026-04; use cart metafields in checkout UI extensions and order metafields in customer account UI extensions.
- Developers must upgrade to 2026-04 and follow migration guides for both checkout and account extensions.
- Order metafield definitions now can automatically copy values from cart metafields when an order is created.
Deprecation of checkout metafields in checkout and customer account UI extensions
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admin.app.intent.link intents now open as a full‑page navigation instead of an overlay modal
Adds cart session attribution and cart attributes for richer checkout data.
Added the `shop_campaign_insights` schema to ShopifyQL, letting apps query campaign performance data using the existing `shopifyqlQuery` field with the `read_reports` scope.