# Nuro R2 revision history

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

Model: [Nuro R2](/models/nuro-r2.md)

## Recorded posture

- First recorded event: 2026-05-24
- Last material change: 2026-05-24
- Material event count: 1
- Editorial event count: 0

## Material events (1)

- **2026-05-24**: created (source: baseline:arc-g)

## 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/nuro-r2/history. REST: /v1/models/275b75ca-33c8-4d8d-82ce-3801e5505e85/history. HTML: [/models/nuro-r2/history](/models/nuro-r2/history)._