# Modular Automation System revision history

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

Model: [Modular Automation System](/models/highres-modular-system.md)

## Recorded posture

- First recorded event: 2026-06-07
- Last material change: 2026-06-07
- Material event count: 1
- Editorial event count: 0

## Material events (1)

- **2026-06-07**: created (source: backfill_script) (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/highres-modular-system/history. REST: /v1/models/44721d04-0046-4e39-85d8-9b6ca64fcf25/history. HTML: [/models/highres-modular-system/history](/models/highres-modular-system/history)._