Can I vibe code CommerceTools?

Build a production-grade Headless Commerce API core in TypeScript (Node.js/Fastify) using PostgreSQL and Redis. The system must replicate CommerceTools' core object model: Projects, Products (with Variants, Attributes, Categories, and PriceBooks), Carts, and Orders.

DATA MODEL & ENTITY SCHEMAS:
1. Product Projection Engine:
   - Implement dynamic attributes using PostgreSQL JSONB with typed schema definitions (Text, Enum, Reference, Money, Set).
   - Implement Product Variants with SKU, barcode, images, dimensions, and per-channel/per-currency Price objects.
   - Products must support Published vs. Staged states with draft editing and catalog versioning.

2. Carts & Cart Discounts:
   - Cart entity supporting line items, custom line items, shipping addresses, tax categories, and dynamic payment states.
   - Cart discount rules engine evaluating predicates against cart totals, item quantities, or category memberships (e.g., 'lineItem.quantity > 2 AND product.category = "shoes"').
   - Recalculate taxes and discounts atomically on every line-item mutation.

3. Inventory & Atomic Reservation:
   - Inventory tracking per SKU across multiple Channels (warehouses).
   - Reserve inventory on Cart completion using Redis distributed locks (Redlock) and PostgreSQL 'SELECT ... FOR UPDATE' row-level locks to avoid race conditions.

4. Order State Machine:
   - Order creation from Cart with state transitions: Open -> Confirmed -> Complete / Cancelled.
   - Payment State (Pending, Paid, Failed) and Fulfillment State (Unfulfilled, Partial, Fulfilled).
   - Emit event payloads (Webhooks) on every state mutation using an outbox pattern (PostgreSQL table + worker queue) to guarantee at-least-once delivery.

API LAYER:
- Provide both GraphQL and REST endpoints matching CommerceTools URI conventions (e.g., /:project-key/products, /:project-key/carts).
- Implement optimistic concurrency control using a 'version' field on every resource; return a 409 Conflict if incoming version doesn't match DB state.
- Expose search/filter capabilities using PostgreSQL Full-Text Search and JSONB containment operators (@>).

FAILURE MODES & OUT OF SCOPE:
- Must gracefully handle concurrency locks during inventory depletion without double-allocating stock.
- Out of scope: Admin UI/Merchant Center (API only), AI/Agentic channels, third-party PSP SDK wrappers, legacy ERP connectors. Plain TypeScript/SQL only.

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