Stock sync and order tagging.

An inventory level changes in one store and Shopify sends an inventory update webhook.

The event lands on an EventBridge bus and a Lambda function picks it up.

The store’s group is looked up, and the SKU is resolved from the inventory item.

For each linked store, the location is translated through the group’s location mapping and the variant with the same SKU is found.

If the other store already holds a newer change, or there is no difference, it is left alone.

Otherwise the difference is applied to that store’s available stock as an adjustment.

The movement is written to a log the team can read inside Hydra.

The stocktake screen reads one SKU’s levels across every store in the group, side by side.

The team sets the level from that screen, rather than opening each store’s admin in turn.

A personalised line carries its own specification: font, size, monogram or stamp, and position on the cup.

Preorder and backorder lines are marked as such, with the message the customer was shown.

Bundle, gift-with-purchase and free gift lines are marked, so they can be told apart from the same product bought on its own.

All of it arrives on the order as line item properties.

Custom tagging workflows then tag the order, so it can be filtered and handled by type from the orders list.