Identify every system that reads or writes collections, including themes, feeds, search tools, ERP jobs and merchandising automation.
Compare required fields and behaviors with the new model, update a test collection first and monitor product membership, sorting and storefront rendering.
Content and platform references reviewed on .
Why API version matters for collection visibility
Shopify’s 2026-07 collection model introduces sources that describe membership. The announcement warns that collections using new features can be omitted from older API-version results because the legacy rule shape cannot represent them. An integration returning fewer collections may therefore need a version and model review before anyone recreates supposedly missing records.
Find every reader and writer
Inventory merchandising jobs, feeds, search indexing and applications that create or inspect collections. Record whether each uses the legacy rule set or the new sources model. A storefront may look correct while a downstream export silently reads an incomplete catalog, so validate the connected systems separately.
Preserve the meaning of membership
Translate each collection into a plain-language rule before rewriting its API representation. Distinguish manual choices, inclusion conditions, exclusions and referenced collections. Test a product that should enter, one that should leave and one that should remain excluded. Where membership applies to a variant, do not substitute a product-level check without reviewing the requirement.
Migrate an integration before changing merchandising
Keep the first release focused on reading and writing the intended model accurately. Compare membership and downstream output against a saved baseline. Once that is reconciled, merchants can introduce new collection behaviour with clearer evidence about which change caused a different result.
Checks for this implementation
- Compare collection counts and identifiers across the affected API versions.
- Validate membership meaning with representative products and variants.
- Record ownership of any source shared across several collections.
Common mistake to avoid
Changing the data model and storefront presentation together makes failures harder to isolate and recover.
The goal is more flexible merchandising without breaking collection URLs, product discovery or operational ownership.
Platform references
Continue with API integration development, or discuss the requirements for your store.
