# Unitree B2 revision history

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

Model: [Unitree B2](/models/unitree-b2.md)

## Recorded posture

- First recorded event: 2026-06-06
- Last material change: 2026-06-06
- Material event count: 1
- Editorial event count: 0

## Material events (1)

- **2026-06-06**: created (source: https://www.unitree.com/b2) (verified)

## 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/unitree-b2/history. REST: /v1/models/6f54c9a8-bcf1-4a43-9e59-5e689cc4f903/history. HTML: [/models/unitree-b2/history](/models/unitree-b2/history)._