Can I vibe code Narvar?

Build a production-ready post-purchase order tracking and self-serve returns application for Shopify using Next.js (App Router), TypeScript, Tailwind CSS, Shopify Admin GraphQL API, and the EasyPost Node SDK.

CORE DATA MODEL & STATE
Implement SQLite via Prisma with the following schema:
- Merchant: id, shopifyDomain, accessToken, easyPostApiKey, returnPolicyDays (default 30).
- ReturnRequest: id, orderId, lineItems (JSON), reason, outcome ('REFUND' | 'EXCHANGE' | 'STORE_CREDIT'), status ('REQUESTED' | 'LABEL_GENERATED' | 'IN_TRANSIT' | 'RECEIVED' | 'COMPLETED' | 'REJECTED'), trackingCode, labelUrl, qrCodeUrl, refundAmount, createdAt.
- ShipmentTracker: id, orderId, easyPostTrackerId, carrier, trackingNumber, status ('pre_transit' | 'in_transit' | 'out_for_delivery' | 'delivered' | 'failure'), estimatedDelivery, statusDetails (JSON).

1. BRANDED ORDER TRACKING PORTAL (/track)
- Public end-user page accepting Order ID/Number and Customer Email.
- Query Shopify GraphQL API (Admin API) to fetch order fulfillment status, line items, and tracking numbers.
- Query EasyPost API for real-time tracking events. Render a visual timeline matching status stages: Order Placed -> Carrier Processing -> In Transit -> Out for Delivery -> Delivered.
- Handle carrier exception flags (e.g., failed delivery, address check required) with dedicated UI alert boxes.

2. SELF-SERVE RETURNS & EXCHANGES PORTAL (/returns)
- End-user authentication via Order ID and Email/Postal Code.
- Fetch eligible return line items. Enforce rules:
  a. Reject items purchased outside the `returnPolicyDays` window.
  b. Filter out non-returnable tags (e.g., 'Final Sale').
- Return outcome workflows:
  a. Refund: Calculate estimated refund based on item cost minus return shipping fee ($5.00 flat deduction).
  b. Exchange: Query Shopify Product API for alternate size/color variants of same product. Create a Shopify Draft Order for the replacement item.
  c. Store Credit: Offer 10% bonus credit if customer chooses gift card over original payment method refund.
- Return Label Generation: Trigger EasyPost API (`easypost.Shipment.create`) using merchant's return address and customer destination address. Generate a prepaid shipping label PDF and QR code. Save `labelUrl` and update `ReturnRequest`.

3. WEBHOOK HANDLING (/api/webhooks/easypost)
- Secure webhook endpoint processing EasyPost shipment update events.
- On `tracker.updated`: Update `ShipmentTracker` and trigger email notification via Resend API when status changes to 'out_for_delivery' or 'delivered'.
- On Return Shipment `delivered`: Automatically trigger Shopify Refund GraphQL mutation (`returnCreate` and `refundCreate`) or issue Shopify Gift Card depending on `ReturnRequest.outcome`.

FAILURE MODES TO HANDLE:
- Invalid carrier tracking codes or unsupported regional carriers: Fallback to standard Shopify tracking URL.
- EasyPost API rate limits or label creation failure: Capture error, mark `ReturnRequest` as `MANUAL_REVIEW`, and email merchant support team.

OUT OF SCOPE:
- Physical drop-off location mapping/QR code scanning at retail counters.
- Advanced ML return fraud scoring or physical warehouse receipt inspection tools.

$ each button prefixes agent-specific run instructions · build your own product, never copy proprietary code, trademarks or designs