# Scuba S1 revision history

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

Model: [Scuba S1](/models/aiper-scuba-s1.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/aiper-scuba-s1/history. REST: /v1/models/4206f74a-b45f-4955-812d-950b32595f3e/history. HTML: [/models/aiper-scuba-s1/history](/models/aiper-scuba-s1/history)._