Install Instruction QR Service

Per-product QR codes that the warehouse drops into each Turn Offroad shipping box, so customers can scan and watch the install video instantly.

What it does

When the warehouse prints a ShipStation packing slip for an order, this service generates a scannable QR label per item in that order. Each QR points to the install video specific to that exact product variant. The customer opens the box, scans, and is watching the walkthrough on their phone within seconds.

How it works

1. Source of truth lives in Shopify — a new variant-level metafield custom.install_video_url holds one URL per variant.
2. This service exposes GET /qr?sku=<sku> — looks up the variant in Shopify, reads the install URL, returns a PNG of the QR code.
3. ShipStation's packing slip template loops over the order's line items and renders <img src=".../qr?sku=[Sku]"> per item — one 4×6 page per product, automatic.
4. No 100+ ShipStation templates to maintain. Shopify metafield is the single source of truth.

What's here right now

Just this placeholder page. The QR endpoint, Shopify metafield wiring, and ShipStation template changes land once Cole confirms the variant-level metafield approach and a few open questions (label stock, fallback for SKUs without a video, per-unit vs per-line-item).