# Stadler Flagship revision history

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

Model: [Stadler Flagship](/models/stadler-rail-flagship.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/stadler-rail-flagship/history. REST: /v1/models/0cab4e83-44f2-447e-9c24-b2ade2fe3d97/history. HTML: [/models/stadler-rail-flagship/history](/models/stadler-rail-flagship/history)._