Can I vibe code Sello?

Build a lightweight marketplace sync engine in Node.js using PostgreSQL and Redis/BullMQ.

1. DATA MODEL:
- Create tables for 'products' (sku, title, price, stock, raw_attributes JSONB), 'channels' (channel_type, credentials JSONB, status), 'field_mappings' (local_key, channel_key), and 'orders' (channel_order_id, status, items JSONB).

2. CORE SYNC PIPELINE:
- Implement an inbound inventory Webhook listener (e.g., Shopify store stock updates).
- Trigger a BullMQ job that fetches mapped product data, formats the payload based on channel rules, and sends an update request to the connected channel API.
- Create a scheduled job (runs every 5 minutes) to poll channel endpoints for new orders, convert payloads to standard format, and create orders in the primary store.

3. ERROR & RATE LIMIT HANDLING:
- Add automatic retry logic with exponential backoff for 429 and 503 HTTP status responses.
- Log payload validation errors (400 responses) into a 'sync_errors' table with SKU, timestamp, and response body without terminating the queue.

4. OUT OF SCOPE:
- Dynamic taxonomy mapping UI, multi-currency conversion, real-time channel status dashboarding.

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