Can I vibe code AdNabu?

Build a Node.js TypeScript microservice using Express and Prisma that syncs a Shopify product catalog to Google Merchant Center.

1. DATA MODEL:
- Store credentials (Shopify API Token, Google Merchant Center ID, OAuth Tokens).
- ProductMapping Rule (id, pattern, transformationType, targetField).
- FeedLog (id, status, totalItems, failedItems, timestamp).

2. CORE FUNCTIONALITY:
- Implement a Webhook Receiver endpoint for Shopify `products/create`, `products/update`, and `products/delete`.
- Implement a GraphQL client to query full Shopify catalog details (products, variants, metafields, options, price, inventory levels).
- Build a Transformer module that maps Shopify products into the standard Google Content API v2.1 `Products` resource format:
  * Standardize title as: `{Vendor} {Title} {Variant Option 1}`.
  * Map barcodes to `gtin`, SKU to `mpn`.
  * Determine `availability` based on inventory quantity ('in stock' vs 'out of stock').
  * Build XML generator using `xmlbuilder2` as a fallback endpoint `/feed.xml` for file-based GMC ingestion.
- Implement OAuth2 flow using `googleapis` package for user authorization with Google Content API for Shopping scope.

3. FAILURE MODES & RESILIENCE:
- Implement exponential backoff for Google API 429 Rate Limit responses.
- Batch API updates in chunks of 100 variants using `custombatch` endpoint.
- Parse Google API error arrays, logging failed product IDs to database with human-readable error reasons.
- Implement retry mechanism for failed webhook payloads.

4. OUT OF SCOPE:
- AI content generation.
- Support for secondary channels (Meta, TikTok).
- Frontend dashboard beyond basic status page.

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