Checkout Rules helps online store merchants control how many units customers can buy before an order is placed. Create minimum, maximum, and pack-size rules for specific products or variants, choose whether a violation blocks checkout or shows a warning, and add a clear custom message for shoppers.
Build rules from your store catalog, test them with the built-in simulator, save drafts, and publish only when you are ready. Versioned releases, audit history, optimistic concurrency, and one-step rollback help teams change checkout policy safely. A site-wide kill switch lets you pause enforcement instantly.
Checkout Rules runs inside your site dashboard and validates the published configuration during checkout. It stores operational rule settings only and is designed to fail open if configuration is unavailable, so an app outage does not prevent legitimate orders.