# Griffin revision history

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

Model: [Griffin](/models/astrobotic-griffin-lander.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/astrobotic-griffin-lander/history. REST: /v1/models/17a69bcb-60ce-446a-b8c0-e4d353451b29/history. HTML: [/models/astrobotic-griffin-lander/history](/models/astrobotic-griffin-lander/history)._