# MAPP (Mobile Autonomous Prospecting Platform) revision history

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

Model: [MAPP (Mobile Autonomous Prospecting Platform)](/models/mapp-rover.md)

## Recorded posture

- First recorded event: 2026-06-01
- Last material change: 2026-06-01
- Material event count: 1
- Editorial event count: 0

## Material events (1)

- **2026-06-01**: created (source: https://en.wikipedia.org/wiki/IM-2) (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/mapp-rover/history. REST: /v1/models/ff91d6b3-346a-4a50-8b97-c7d970ca6904/history. HTML: [/models/mapp-rover/history](/models/mapp-rover/history)._