Shopify retires API version 2025-07 on July 16 — pinned apps don't error, they silently fall forward to 2025-10

Short summary

Shopify retires API version 2025-07 on July 16, falling forward to 2025-10 silently—requests won't error, they'll use the newer schema. Three concrete breaking changes await unprepared clients: StoreCreditAccount.owner widened to a union, ProductVariant.taxCode deprecated, and InventoryItem.variant replaced by a connection. Detect this by asserting on X-Shopify-API-Version response headers, and proactively test and migrate before the cutoff.

• •Version 2025-07 sunsets July 16; pinned apps silently fall forward to 2025-10 without 200 errors
• •Silent fall-forward means schema changes happen invisibly—StoreCreditAccount.owner type widens, taxCode deprecates, InventoryItem fields migrate
• •Detect fall-forward by asserting X-Shopify-API-Version headers; migrate and test deliberately instead of inheriting breaking changes on Shopify's schedule

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