Shopify Scripts are deprecated. Every rule written in Ruby against the old Scripts API needs to be rebuilt on Shopify Functions — we do that migration cleanly, with full test coverage, so checkout behavior doesn’t change.
Scripts-era logic is often years old, undocumented, and load-bearing — which makes migrating it without breaking checkout the hard part.
We read your existing Scripts, rebuild the same behavior as native Functions, and simulate every rule before it goes anywhere near production.
We read every existing Script and document exactly what logic it’s running — intentional or not.
Each Script rule is mapped to its Shopify Functions equivalent, flagging anything that needs a different approach.
Reimplemented natively on the checkout extensibility APIs — not a shim, not a workaround.
Every migrated rule run through the simulator against real checkout contexts before cutover.
Old vs. new behavior compared directly, so nothing changes silently.
A rollout plan that keeps a rollback path open until the new Functions are proven.
Tell us what’s running today. We’ll scope the migration and tell you what it actually involves — before you commit to anything.