shopify scripts deprecation breaking checkout discount

The actual problem

Legacy Scripts discounts stop applying after Checkout Extensibility migration, spiking bounce and support tickets.

Do this

1. Confirm whether the shop still relies on Scripts vs Functions/UI extensions.
2. Rebuild critical discounts as Shopify Functions before turning Scripts off.
3. A/B test checkout totals for top promo codes on mobile.
4. Freeze paid acquisition until discount parity is verified.

Tools for this job

• Tillkiln

  Catch stacking/discount leaks after migration

• Shopify Discount Docs

  Current combine + Functions guidance

Related intents

• shopify checkout extensibility custom field broken
• shopify discount codes stacking unexpectedly