In progress
This one is still being written.
The summary above is the shape of it. If this is the problem in front of you right now, don't wait for the write-up — ask us directly and we'll walk you through what we'd do.
Ask an engineerCheckout · 12 August 2026 · 9 min
Migrating off checkout.liquid without losing your discount logic
Shopify Functions cover most of what checkout.liquid used to do, but the mapping is not one to one. Here is how we sequence the migration so discounts never go dark in production.
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