When inventory for a tracked SKU drops below reorder threshold, alert Slack + create a Trello card on the reorder board.
Each step is a single node on the canvas. Order matters; everything else is dragging.
Shopify Inventory Updated.
If new quantity < reorder_threshold (per-SKU config): continue.
Slack DM to ops + Trello Create Card on Reorder board with SKU details.
Free tier available. No credit card. No onboarding call.