Stripe Basil Quietly Moved current_period_end Off Subscription — And a Lot of Code Broke

On March 31, 2025, Stripe shipped the Basil API version. Among other changes, it removed three fields from the Subscription object that a lot of production code was reading: current_period_start — moved to subscription items current_period_end — moved to subscription items billing_thresholds — removed entirely (later reintroduced — more on this) If you upgraded your account's default API version without pinning the SDK, the endpoint still returned 200 OK . The subscription objects still serializ