# Airbility AB-U60 revision history

Append-only Arc G field-change log. Forward-only honesty: events accrue from Arc G adoption.

Model: [Airbility AB-U60](/models/airbility-ab-u60.md)

_No events on file. Arc G is forward-only; the recorded event log accrues from Arc G adoption (2026-06-04) and records material changes as they flow through the updateEntityField chokepoint. For the current state of this model, see the model page._

## Forward-only note

Arc G is forward-only. The event log accrues from the Arc G adoption point. Fields with no events post-baseline equal the current cached value and are not independently verified at any prior date. To restate a recorded change, write a new event through the updateEntityField chokepoint.

_Canonical URL: /models/airbility-ab-u60/history. REST: /v1/models/347d2a85-dece-4da1-ad40-71964d4f795c/history. HTML: [/models/airbility-ab-u60/history](/models/airbility-ab-u60/history)._