Configure Autumn usage-based billing with credit checks, plan gates, and metered AI usage.
npx skills add https://github.com/EpicenterHQ/epicenter --skill autumn
Please help me install this Agent Skill. Skill: autumn Source: https://github.com/EpicenterHQ/epicenter/tree/main/.agents/skills/autumn Command: npx skills add https://github.com/EpicenterHQ/epicenter --skill autumn
Integrating usage-based billing into an application requires correctly modeling features, credit systems, plans, and Stripe-backed subscriptions, and mistakes in configuration or SDK usage cause failed credit checks, incorrect deductions, or broken plan upgrades.
autumn.config.ts and push them with the atmn CLI, following Autumn's snake_case naming and PlanItem interval rules.requiredBalance, with refunds through negative track() values.getOrCreate is awaited before any check() call.Ask the AI to add a credit check gate for a new AI model endpoint using the Autumn billing configuration in this project.
High-intent search queries and answers about installing and using this skill.
Define features and plans in autumn.config.ts using the atmn builders, push the config with `bun x atmn push`, then gate endpoints with the autumn-js SDK's check() method using sendEvent: true to deduct credits atomically.
Use a single metered feature with creditCost: 1 and vary the requiredBalance at runtime based on a model-to-credit mapping table. Autumn's check() deducts exactly the requiredBalance amount, giving per-model pricing without creating dozens of features.
Autumn's /check endpoint does not auto-create customers, so customers.getOrCreate() must be awaited before any check() call. Fire-and-forget customer creation causes race conditions where the check runs before the customer exists.
No, reset.interval and price.interval are mutually exclusive on a PlanItem. For paid plans, price.interval controls both the billing cycle and when the included balance resets, so a separate reset field is not needed.
Call autumn.track() with a negative value, such as track({ customerId, featureId: 'ai_usage', value: -credits }), to refund the exact deducted amount. This is typically queued in an afterResponse handler so it does not block the error response.
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