Agent skill
billing
Billing - Stripe, webhooks, subscriptions. Use when implementing payments.
Install this agent skill to your Project
npx add-skill https://github.com/majiayu000/claude-skill-registry/tree/main/skills/other/billing-sylphxai-flow
SKILL.md
Billing Guideline
Tech Stack
- Payments: Stripe
- Workflows: Upstash Workflows + QStash
- Database: Neon (Postgres)
- ORM: Drizzle
Non-Negotiables
- Webhook signature must be verified (reject unverifiable events)
- Stripe event ID must be used for idempotency
- Webhooks must handle out-of-order delivery
- Subscription state changes must be audit-logged
- Payment failures must trigger appropriate user communication
Context
Billing handles the payment processing mechanics — webhooks, subscription lifecycle, payment methods. It's the plumbing that moves money. Pricing strategy and entitlements live in pricing.
The platform owns billing logic. Stripe is a payment processor. All billing configuration must be in code, not Stripe dashboard.
Driving Questions
- Are webhooks handling all subscription lifecycle events?
- What happens when payment fails mid-cycle?
- How are disputes and chargebacks handled end-to-end?
- Can failed webhooks be safely replayed?
- Where could revenue leak (failed renewals, unhandled states)?
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