Builds test suites for Stripe recurring-billing flows: trial-to-paid conversion, proration on plan upgrade and downgrade, dunning on failed renewal, cancel and reactivation, and the full subscription webhook event matrix (invoice.payment_failed, customer.subscription.updated, customer.subscription.deleted, invoice.paid). Uses Stripe Billing test clocks (POST /v1/test_helpers/test_clocks) to time-travel through billing cycles without calendar delay. Distinct from stripe-test-cards-and-webhooks (one-time PaymentIntents) and payment-webhook-replay (idempotency + replay robustness). Does not cover single-event CLI replay or handler idempotency testing (see payment-webhook-replay for those). Use when authoring tests for subscription or recurring-billing integrations.
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The skill is specifically designed for direct financial operations, giving the agent the ability to move money or execute financial transactions — such as payment processing, cryptocurrency operations, banking integrations, or market order execution.
The skill specifically uses the Stripe API (test helpers, customers, subscriptions, paymentMethods, invoices) to create customers and subscriptions, attach payment methods, trigger/advance test clocks, preview and apply invoices/prorations, and call stripe.invoices.pay — i.e., it directly executes payment-related operations against a payment gateway. This is explicit direct financial execution capability.