A postcode blacklist you can actually maintain

Blacklists rot: someone adds “73” meaning one suburb and quietly blocks an entire prefix. Drydock shows every rule in plain English and traces every match — “postcode starts with one of [73] · actual: 73301 · pass”.

Your saved test cases re-run on every publish, so the day a list edit breaks a good postcode, the publish screen tells you — not your sales graph two days later.

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.