# Unitree B1 revision history

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

Model: [Unitree B1](/models/unitree-b1.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://shop.unitree.com/products/unitree-b1) (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-b1/history. REST: /v1/models/d479dc21-73e8-4402-af1c-4ce6f725a7ca/history. HTML: [/models/unitree-b1/history](/models/unitree-b1/history)._