Reference & List Attributes for Product Families

Automatic product families can now group by reference-typed and list-typed attributes, not just plain values. Metaobject-reference metafields (and computed attributes that return references) key the family by the referenced object's handle and take its display name, so renaming the metaobject in Shopify relabels the family without moving any products.

List attributes like list.metaobject_reference and list.product_reference resolve to one deterministic entry per product, so reordering the list never shifts products between families — only changing its membership does. The attribute picker also now shows computed attributes alongside their compile status, so you can tell at a glance when one isn't ready to drive families yet.

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