Can I vibe code Centra?

Build a headless commerce backend in Node.js (TypeScript) using Nest.js, PostgreSQL, and Prisma ORM that supports localized D2C sales and B2B wholesale matrix ordering.

1. DATA MODEL:
- Markets: ID, code (e.g., US, EU, UK), currency, taxRate, priceListId.
- Products & Variants: Product (id, title, description, brand), Variant (id, productId, sku, size, color).
- PriceLists: PriceList (id, name, marketId), Price (id, variantId, priceListId, amount, currency).
- Inventory: Warehouse (id, name), Stock (id, variantId, warehouseId, quantity, allocated).
- B2B Accounts: Company (id, name, creditLimit, paymentTerms), Address, User (id, companyId, role).
- Orders: Order (id, marketId, companyId nullable, type: D2C | B2B, status, totalAmount, currency, lineItems).

2. CORE API & SERVICES:
- Storefront GraphQL API: Query catalog resolved dynamically by current Market context. Apply market-specific pricing and currency rounding rules.
- Cart Service: Handle line items, validate real-time variant stock, calculate localized VAT based on delivery market.
- B2B Wholesale Matrix Service: Endpoint accepting matrix orders (array of variant IDs and quantities across size grids). Implement credit limit checks and bulk quantity tiered pricing discounts.
- ERP Sync Webhooks: Asynchronous webhooks to emit order payloads (JSON) and receive inventory updates from external ERP systems.

3. FAILURE MODES & EDGE CASES:
- Race Conditions: Use database row-level locking or atomic inventory updates when reserving stock during checkout.
- Partial Stock Allocation: Handle B2B pre-orders where requested stock exceeds available inventory; split line items into 'in-stock' and 'pre-order' allocations.
- Currency Mismatches: Reject orders where line item currency does not match the active market's base currency.

4. OUT OF SCOPE:
- Frontend UI themes (deliver pure GraphQL/REST API endpoints).
- Native credit card processing (mock payment intent confirmation via Stripe webhooks).
- Multi-tenant SaaS administration.

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