# GR00T 2 revision history

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

Brain: [GR00T 2](/brains/gr00t-2.md)

## Recorded posture

- First recorded event: 2026-11-09
- Last material change: 2026-11-09
- Material event count: 1
- Editorial event count: 0

## 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.

_Canonical URL: /brains/gr00t-2/history. REST: /v1/brains/c9775d72-6fba-48b3-ade5-3355787d7f72/history. HTML: [/brains/gr00t-2/history](/brains/gr00t-2/history)._