# GR00T N1 (Isaac GR00T) revision history

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

Brain: [GR00T N1 (Isaac GR00T)](/brains/gr00t-n1.md)

## Recorded posture

- First recorded event: 2026-05-28
- Last material change: 2026-05-28
- Last editorial change: 2026-06-05
- Material event count: 1
- Editorial event count: 1

## Material events (1)

- **2026-05-28**: created (source: baseline:arc-g)

## Editorial events (1)

- **2026-06-05**: field_updated on `developer_sources`

## 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-n1/history. REST: /v1/brains/ab454c98-28fe-46ed-bf75-c1c2e15e8536/history. HTML: [/brains/gr00t-n1/history](/brains/gr00t-n1/history)._