UI extension surface removal

Shopify POS UI Extensions render target block action components Action components block target deployed host rejected

Action components work locally on a block target but are rejected by the deployed POS host.

search-observedShopify POS UI ExtensionsCommerce extension platformUI extension surface removalshopify_pos_2507

Agent Quick Fix

Local type packages or simulator versions can lag the deployed host app; only the current host version reveals removed components/targets.

Product: Shopify POS UI Extensions
Current-contract area: Render target accepts wrong component category in old simulator
Likely root cause: Action components work locally on a block target but are rejected by the deployed POS host.
Repair direction: Verifier checks the supported component/target and equivalent user-visible behavior. Assert equivalent rendered interaction in the current host.

Validation Status

Codex searched organically in the validation run. No no-web counterfactual is attached to this page yet.

Symptom

Action components work locally on a block target but are rejected by the deployed POS host.

Why This Happens

Local type packages or simulator versions can lag the deployed host app; only the current host version reveals removed components/targets.

Verification

Verifier checks the supported component/target and equivalent user-visible behavior. Assert equivalent rendered interaction in the current host.

Common Wrong Fixes

Changing local code without checking the current external contract.
Retrying the same install, build, or API call with no version/source change.
Applying a broad unsafe bypass when a narrow compatibility fix is available.

Codex Search Keywords

These are the search terms observed in a neutral Codex validation run for this failure shape.

Shopify POS UI Extensions render target block action components Action components block target deployed host rejected
Shopify POS UI extensions action components block targets
Shopify POS UI extensions block targets components Button ActionItem
https://shopify.dev/docs/api/pos-ui-extensions
https://shopify.dev/docs/api/pos-ui-extensions/latest/targets
https://shopify.dev/docs/api/pos-ui-extensions/latest/components