#342 Demo: Smart Dunning & Subscription Recovery

## Overview Sophisticated billing recovery system managing failed payment lifecycle over weeks. ## Workflow Steps 1. Payment fails (trigger) 2. Send 'Update Card' email 3. Sleep 3 days 4. Check if card updated (HTTP call to billing API) 5. If no: Retry charge 6. If fail: Downgrade service tier 7. Notify user 8. Sleep 7 days 9. Cancel account ## Tools Required - tools.email.send ✅ - tools.http.request ✅ (billing API) - Payment Gateway App ❌ (Stripe/PayPal - marketplace) ## DSL Operators TaskOperator, WaitOperator, ConditionalOperator, ErrorHandler ## Mock Implementation - Mock billing API with HTTP endpoints - Simulate payment success/failure ## Durable Advantages - Manages weeks-long grace period - No cron jobs or external state DB needed - Automatic state persistence