# UC Berkeley Robotics revision history

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

Model: [UC Berkeley Robotics](/models/ucb-robotics.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/ucb-robotics/history. REST: /v1/models/369d4ed5-0dd8-4f7b-b9b4-6d247ae85d03/history. HTML: [/models/ucb-robotics/history](/models/ucb-robotics/history)._