How to add rollover logic to a metered feature

Portcall stores a rollover field on plan features, but rollover carry-over behavior is not exposed as a configurable public v1 API workflow yet.

What to do today

• Use quota + interval as the primary control.
• Evaluate remaining balance via entitlement reads.
• If you need custom rollover now, apply it in your own app logic and write usage through meter events.

Suggested pattern

1. Read entitlement near period boundary.
2. Compute carry-over amount in your app.
3. Apply your policy in next-cycle usage or credits logic.

For most integrations, monthly reset + explicit quotas is the cleanest starting point.