What to ask before you commit to a Shopify Function

Most Function tickets fail in discovery, not in the WASM binary. The expensive mistake is treating a discount or cart shape as a theme-script problem when the failure modes live in checkout, admin orders, and determined shoppers.

Start with the failure mode

Ask what already broke. Stacking discounts, gift lines, B2B carts, and mid-campaign CAP changes are not edge cases — they are the job. If the answer is “the app just needs to stop dying,” pause: you may be buying a Function that still has to express the same messy rule set.

Constraints before recipes

Before anyone pastes a sample run handler, pin:

1. What is the exact CAP or lock rule — and who can change it mid-campaign?
2. Where must the rule survive — storefront only, or admin orders and edits too?
3. What is explicitly out of scope for a weekend pilot?

Public notes stop at framing. The production pattern — white-label, under NDA — belongs in paid work.

Public notes show judgment. Paid engagement gets the pattern.

Soft path

If you already know the ticket shape and need someone who has shipped this class of work on Plus storefronts, the hire surface is /work — not another tutorial mill.