# pi0.5 (pi-0.5) revision history

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

Brain: [pi0.5 (pi-0.5)](/brains/pi05.md)

## Recorded posture

- First recorded event: 2026-06-03
- Last material change: 2026-06-03
- Material event count: 1
- Editorial event count: 0

## Material events (1)

- **2026-06-03**: 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.

_Canonical URL: /brains/pi05/history. REST: /v1/brains/83b7c9c1-40b4-4823-b7b6-23046fce0f9c/history. HTML: [/brains/pi05/history](/brains/pi05/history)._