# ABB revision history

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

Company: [ABB](/companies/abb.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 company, see the company 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: /companies/abb/history. REST: /v1/companies/3d9e2756-dc22-4396-a577-2c5fc141d7cd/history. HTML: [/companies/abb/history](/companies/abb/history)._