Can I vibe code Elastic Path?

Build a custom, lightweight headless commerce REST API engine using Node.js, Fastify, TypeScript, Prisma, and PostgreSQL.

1. DATA ARCHITECTURE
- Products: id, sku, title, description, status (draft, active).
- Product Variants: id, product_id, sku, price_cents, currency, options (JSONB).
- Pricebooks: id, name, currency, valid_from, valid_to, priority.
- Pricebook Rules: id, pricebook_id, variant_id, price_cents.
- Inventory: id, variant_id, stock_location_id, quantity_available, quantity_reserved.
- Carts: id, customer_id, currency, total_cents, expires_at.
- Cart Line Items: id, cart_id, variant_id, quantity, unit_price_cents.
- Orders: id, cart_id, customer_id, status (pending, paid, fulfilled, canceled), payment_intent_id, total_cents.

2. CORE API ENDPOINTS
- GET /v1/products: List active products with pagination, category filter, and variant prices.
- POST /v1/carts: Create a new cart tied to a currency.
- POST /v1/carts/:id/items: Add line item to cart, look up variant price based on active pricebook, calculate totals.
- POST /v1/carts/:id/checkout: Initiate checkout. Atomically reserve inventory using PostgreSQL row locking (`SELECT FOR UPDATE`). If inventory is sufficient, create an order record in 'pending' status.
- POST /v1/webhooks/stripe: Listen for charge success, update order status to 'paid', convert reserved inventory to decremented stock.

3. BUSINESS LOGIC & CONCURRENCY
- Use Prisma transactions for checkout to avoid inventory race conditions.
- Cart line item calculations must re-evaluate prices against active pricebooks upon update.
- Implement inventory reservation timeouts: reserved inventory releases back after 15 minutes if unpaid.

4. OUT OF SCOPE
- Admin UI dashboard (API only).
- Multi-tier B2B organization hierarchies.
- Third-party shipping carrier rate calculation.

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