Can I vibe code SimplyVAT?

Build an internal EU VAT compliance microservice for a Node.js/PostgreSQL ecommerce platform.

1. DATA MODEL:
- Orders: id, platform_order_id, created_at, billing_country, shipping_country, currency, total_amount, tax_amount, customer_type (B2B|B2C), vat_number.
- EcbRates: date, currency, rate_to_eur.
- VatThresholds: jurisdiction_code, threshold_eur, current_year_accumulated_eur, alert_status.
- TaxSummaries: period (e.g., 2024-Q1), jurisdiction_code, total_net_sales_eur, total_vat_collected_eur.

2. CORE FUNCTIONALITY:
- Sync orders daily via webhook/API. Convert line-item amounts to EUR using the ECB exchange rate on the transaction date.
- Maintain an aggregate distance-selling tracker. Once total B2C cross-border sales into the EU exceed €10,000 in a calendar year, trigger an alert for EU One-Stop Shop (OSS) registration requirements.
- Integrate an asynchronous worker to validate B2B customer VAT numbers against the EU VIES SOAP API. If valid, set tax_rate to 0% (Reverse Charge) and log validation_timestamp and VIES consultation_number.
- Generate quarterly OSS reports detailing net sales and VAT collected, grouped by destination EU member state and applicable standard/reduced rate.

3. FAILURE MODES & EDGE CASES:
- If VIES API is down, queue re-validation and flag order for manual review before invoice generation.
- If ECB rates are missing for weekends or holidays, fall back to the most recent published rate.
- Properly handle partial refunds and credit notes by adjusting accumulated sales figures in the correct tax quarter.

4. OUT OF SCOPE:
- Direct submission to government portals.
- Legal tax representation and indemnity coverage.

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