payment-method-add
Use when adding a new payment method to the Stripe gateway. Triggers include "add payment method", "new UPE method", "support <method-name> on checkout", "register a payment method", or any work that introduces a new `WC_Stripe_UPE_Payment_Method` subclass. A new method spans PHP and frontend plus constants and registration; this skill walks the full sequence so nothing is silently missing on checkout.
SKILL.md
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