# A2I2 revision history

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

Model: [A2I2](/models/forth-a2i2.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/forth-a2i2/history. REST: /v1/models/a2052b9a-fc2d-4a4f-abc5-f195660a32c1/history. HTML: [/models/forth-a2i2/history](/models/forth-a2i2/history)._