Bookable Events — Development skill for Claude Code

bookable-events

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An [Agent Skill](https://agentskills.io) that teaches an agent to build **bookable events with Stripe payments and anti-no-show deposits** in a **Next.js App Router** app: capacity-limited registration for free and paid events, Stripe Checkout tickets, a refundable card hold on free events that is released when the guest checks in and captured when they don't show, staff check-in, refunds and event cancellation. Firestore or Postgres; any ISO currency, USD by default.

Events are the easy half. The hard half is money moving while seats are scarce: a seat taken before payment, a payment that lands after the seat expired, a card hold that lapses before a no-show can be charged. The skill runs **every change through one pure state machine inside a database transaction, and calls Stripe only after commit**. A durable intent (`RELEASING`, `CAPTURING`, `REFUND_PENDING`) is left behind, and a single five-minute tick retries it with the same idempotency key until Stripe confirms.

This skill was written by the engineer who has shipped this module. The earlier implementation it was audited against was the events module of a multi-location venue-booking system. The templates hold the properties such a module has to hold: a paid event is never free in a currency it has no price in; a declined attempt inside open Checkout keeps the seat, and only session expiry releases