Can I vibe code Global-e?

Build a multi-currency and localized cross-border checkout engine using Next.js, TypeScript, and Tailwind CSS.

1. DATA MODEL:
- Storefront Region: id, countryCode, currencyCode, taxRate, dutyInclusive (boolean), priceMultiplier.
- Product Price: productId, regionId, amount, compareAtAmount.
- Cart: items, customerCountry, exchangeRate, calculatedTax, calculatedDuty, shippingFee.

2. CORE FUNCTIONALITY:
- Detect user region via GeoIP header (or fallback to selector) and serve local currency prices.
- Fetch real-time exchange rates from Open Exchange Rates API and cache them in Redis for 12 hours with a configurable safety margin (e.g., +1.5% buffer).
- Integrate with a duty/tax API mock service (or Zonos API structure) that takes HS codes, origin, destination, and product value to return estimated landed duties and import VAT.
- Build a checkout form that dynamically renders localized address input fields (e.g., postal code format, state/province requirements based on destination country).
- Calculate final checkout total including product subtotal, local tax, landed duties, and international shipping rates.

3. FAILURE MODES & HYGIENE:
- If FX rate fetch fails, fallback to cached stale rate and alert system.
- If duty API times out (>1.5s), default to estimated fixed duty rate for the target country to prevent checkout abandonment.
- Ensure strict decimal rounding according to currency rules (e.g., JPY has no decimals).

4. OUT OF SCOPE:
- Merchant of Record legal tax filing, physical parcel customs clearance documentation, or direct banking settlement.

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