Create a fixed kit (up to 12 products with quantities) or a build-a-box where the shopper picks exactly N items from collections or a product list. A theme block shows the kit or the picker. Every item stays a normal cart and order line, so each component's stock is deducted as usual and the app never edits inventory. One automatic discount function applies the bundle discount and checks the rules at checkout. Express checkout can skip the cart, so add the bundle first.

• Fixed kits: up to 12 products with quantities, at a fixed total or percent off
• Build-a-box: the shopper picks exactly N items from collections or products
• Each item stays its own cart line, so component stock is deducted as usual
• Bundle discount applied by a discount function and re-checked at checkout
• Warns when a component is sold out, draft, archived or off the Online Store