Can I vibe code CheckoutX?

Build a post-purchase upsell application for WooCommerce/Node.js custom checkout setups.

1. DATA MODEL
Create tables/schemas for:
- `funnels`: id, name, active_status, priority, conditions (JSON rules for triggering based on cart contents or cart total).
- `upsell_offers`: id, funnel_id, product_id, discount_percentage, display_order, timer_seconds.
- `upsell_impressions`: id, offer_id, order_id, status (viewed, accepted, declined), gross_revenue.

2. CORE FUNCTIONALITY
- Intercept post-payment webhook or redirect phase prior to final order confirmation.
- Evaluate funnel trigger rules against primary order line items and total order value.
- If a rule matches, present an intermediate upsell page showing the discounted offer with an active countdown timer.
- Use vaulted payment gateway tokens (Stripe Payment Intents with `setup_future_usage`) to perform one-click charges without requiring re-entry of card details.
- On accept: Execute immediate charge via Stripe API, append line item to original order record, update shipping/tax calculations, and proceed to thank-you page.
- On decline/timeout: Bypass offer immediately and proceed to final thank-you page.

3. FAILURE MODES & SECURITY
- Token Revocation: Handle cases where post-purchase payment token authorization fails gracefully without canceling the initial order.
- Race Conditions: Lock inventory for the upsell item during the offer window; release if declined or timed out.
- Idempotency: Ensure the post-purchase charge endpoint enforces strict idempotency keys to prevent double-charging on repeat button clicks.

4. OUT OF SCOPE
- Native off-site redirection for Shopify (limit scope to WooCommerce or custom headless APIs).
- Complex multi-variant subscriptions or recurring billing logic.

$ each button prefixes agent-specific run instructions · build your own product, never copy proprietary code, trademarks or designs