# Dreame X40 Ultra revision history

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

Model: [Dreame X40 Ultra](/models/dreame-x40.md)

_No events on file. Arc G is forward-only; the recorded event log accrues from Arc G adoption (2026-06-04) and records material changes as they flow through the updateEntityField chokepoint. For the current state of this model, see the model page._

## 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/dreame-x40/history. REST: /v1/models/31850fc4-5a9f-4fd0-a5ff-794ab279d758/history. HTML: [/models/dreame-x40/history](/models/dreame-x40/history)._