Shipping rules by postcode, done properly

Zones are too coarse: “the whole US” isn't a shipping policy when remote ZIPs cost triple to serve. Drydock matches postcodes by exact value, prefix (“all of 73x”), or pattern.

And because a fat-fingered prefix can silently kill checkout for a whole state, every rule runs in a simulator first, with a trace showing which postcode matched which condition and why.

Test first. Undo after. Always.

Drydock runs every draft rule against a synthetic checkout — real products, any address, any customer — and shows a trace of every condition with the actual values compared. Save good scenarios as test cases and they re-run on every publish, so a rule that changes an outcome gets flagged on the publish screen instead of at your checkout. Every publish is an immutable version with a diff, and restoring a previous version is one click.