# iRobot Roomba Combo j9+ revision history

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

Model: [iRobot Roomba Combo j9+](/models/roomba-combo-j9.md)

## Recorded posture

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

## Material events (1)

- **2026-06-06**: created (source: https://www.irobot.com/en_US/roomba-combo-10-max-robot-with-autowash-dock/X085020.html) (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/roomba-combo-j9/history. REST: /v1/models/64652e36-b11b-42c0-a7ab-ccb4fc9e2a34/history. HTML: [/models/roomba-combo-j9/history](/models/roomba-combo-j9/history)._