- Added parent‑child relationship fields for cart lines across APIs
- Supported in Cart AJAX API now, and in Storefront API and Checkout UI Extensions from version 2025‑10
- Introduced new parent reference fields (parentId/parent_line_key, parentID, parent.lineId/parent.merchandiseId)
New: Support for nested cart lines
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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.