In POS UI extensions API version 2026-10 , Cart API mutations reject when Shopify POS doesn't confirm that the cart changed. In earlier versions these mutations resolve whether or not POS applied the write.
Summary extracted from the official source text. Verify details on the source page.
| Platform | Shopify |
|---|---|
| Effective date | No date published |
| Precision | n/a |
| Published | 2026-10-07 |
| Categories | Breaking / action required |
| Tags | 2026-10, API, Action Required, Breaking API Change, POS Extensions |
| Official source | Shopify developer changelog ↗ |
| Fetched | 2026-10-17T03:44:00+00:00 |
| First seen | 2026-10-17T01:05:46+00:00 |
| Status | Listed by the source |
| Stable ID | shopify-732182ba92 · JSON |