How to Track Stripe API Changes Automatically (Before They Break Your Code)
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External API updates and webhook deprecations present a subtle yet dangerous risk to backend services. Using Stripe as a case study, this piece illustrates how field deprecations—such as replacing `SubscriptionItem.quantity` with `quantities[]` or removing `Invoice.payment`—can introduce silent failures into production codebases. Webhook payload changes are particularly hazardous because code accessing deprecated properties like `event.data.object.plan` will evaluate to `undefined` without throwing explicit runtime errors. For engineers designing resilient backend integrations in TypeScript, establishing proactive tracking for upstream API changes is critical to prevent silent data corruption and runtime breakage.