# Walker S2 revision history

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

Model: [Walker S2](/models/ubtech-walker-s2.md)

## Recorded posture

- First recorded event: 2026-05-25
- Last material change: 2026-05-25
- Material event count: 1
- Editorial event count: 0

## Material events (1)

- **2026-05-25**: 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/ubtech-walker-s2/history. REST: /v1/models/f45f8efc-7b2d-4b1b-897c-30dea33f9b1b/history. HTML: [/models/ubtech-walker-s2/history](/models/ubtech-walker-s2/history)._