Can I vibe code Fabric?

Build a scalable, headless commerce API using Node.js, TypeScript, Fastify, PostgreSQL, and Prisma ORM. Include Redis for caching catalog queries and handling lock queues.

1. DATA MODEL:
- Implement models for Product, ProductVariant, InventoryLevel, Location (Warehouse), Order, OrderItem, Customer, and PaymentTransaction.
- Products must support dynamic key-value attributes, options (Size, Color), and multi-currency price lists.
- InventoryLevel must track stock by Variant and Location (e.g., variant_id, location_id, reserved_qty, available_qty).

2. INVENTORY RESERVATION ENGINE:
- Implement atomic inventory locking using PostgreSQL row-level locks (SELECT FOR UPDATE) or Redis redlock.
- When a customer initiates checkout, create an InventoryReservation with a 15-minute expiration time.
- Deduct available stock atomically. If reservation expires before order placement, release the inventory back to available_qty via a background cron worker.

3. ORDER ROUTING & STATE MACHINE:
- Implement a finite state machine for Orders: PENDING -> PAYMENT_AUTHORIZED -> PROCESSING -> SHIPPED -> DELIVERED / CANCELLED.
- Create a routing rule module that selects the optimal warehouse location for fulfillment based on nearest location with complete stock availability.
- If no single location has full stock, support split-shipment order creation (multi-location fulfillment).

4. REST / GRAPHQL APIs:
- GET /api/v1/products: Fast catalog response with Redis caching layer and tags for instant cache invalidation on catalog updates.
- POST /api/v1/cart/checkout: Process checkout, reserve stock, calculate taxes via modular provider pattern, and generate payment intent.
- POST /api/v1/webhooks/payment: Idempotent handler for payment confirmation. Move order status to PAYMENT_AUTHORIZED and confirm inventory deduction.

5. FAILURE MODES & EDGE CASES:
- Handle race conditions when 100+ concurrent requests attempt to reserve the final unit of stock.
- Ensure webhook handlers log event IDs and return HTTP 200 on duplicate processing to guarantee idempotency.
- Provide fallback error handling if tax or shipping calculation APIs time out.

OUT OF SCOPE:
Do not build a front-end UI or complex legacy ERP connectors. Focus purely on clean TypeScript API routes, database schema, and concurrency-safe commerce domain logic.

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