Can I vibe code Growave?

Build a custom embedded Shopify App (using Node.js/Remix and Shopify App Bridge) replacing Growave's Loyalty Points and Wishlist modules.

1. SYSTEM OVERVIEW & ARCHITECTURE:
- Serverless Node.js backend running on Cloudflare Workers or Vercel, integrated with a PostgreSQL database (Prisma ORM).
- Storefront integration using Shopify Theme App Blocks (Liquid + vanilla JS bundle under 20KB).

2. DATA MODEL:
- Customer (id, shopify_customer_id, points_balance, created_at)
- PointLedger (id, customer_id, points, type ['earn'|'redeem'|'expire'], order_id, reason, created_at)
- WishlistItem (id, customer_id, product_id, variant_id, created_at)
- RewardRule (id, min_points, discount_value, discount_type ['fixed'|'percentage'])

3. CORE FUNCTIONALITY:
- Webhook Handler: Process 'orders/paid' webhooks. Grant 1 point per $1 spent. Insert a record into PointLedger and update Customer points_balance. Check for idempotency using order_id.
- Process 'refunds/create' webhooks to deduct earned points for refunded items.
- Storefront API: Endpoint `/api/wishlist` allowing customers to add/remove products. Store customer state tied to Shopify logged-in customer ID, fallback to localStorage for guests.
- Rewards API: Endpoint `/api/redeem` allowing authenticated customers to exchange points for a generated unique Shopify Single-Use Discount Code generated via Shopify GraphQL API ('discountCodeBasicCreate').
- Storefront App Block: Render a 'Wishlist Heart' toggle button on product pages and a floating 'Loyalty Drawer' showing point balances and available redemption rewards.

4. EDGE CASES & FAILURE MODES:
- Handle Shopify webhook retries gracefully; return 200 immediately after verifying webhook HMAC and enqueueing background job.
- If a generated discount code API call fails, revert point balance mutation inside a SQL transaction.
- Rate limit storefront API endpoints using Redis or Cloudflare KV to prevent API abuse.

5. OUT OF SCOPE:
- Do not build UGC/Instagram scraping, photo upload review pipelines, or custom email rendering engines. Emit Webhook events to Klaviyo for point updates and review requests.

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