OneShelf

Your blanks, materials, or bulk stock become one base stock. Every listing sells from that number.

One blank behind 50 printed designs. Yarn sold as skeins and as kits. A 30 ml bottle sold as 2 ml decants. Shopify gives each listing its own count, so shared stock oversells. OneShelf keeps one base stock that every listing sells from. Each sale deducts what that listing uses, and the counts stay correct online and at POS. Preview first: see every change before it writes. Every move lands in the ledger.

• One base stock behind many listings
• Set how much each variant uses per sale
• Deducts online and at POS; refunds put stock back
• Checkout guard against shared oversell
• Preview mode writes nothing until you approve