# Sierra Space x Boeing revision history

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

Partnership: [Sierra Space x Boeing](/partnerships/sierra-space-x-boeing.md)

_No events on file. Arc G is forward-only; the recorded event log accrues from Arc G adoption (2026-06-04). For the current state of this partnership, see the partnership 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.

_Canonical URL: /partnerships/sierra-space-x-boeing/history. REST: /v1/partnerships/42bf53c9-7c16-41d8-ac67-47eaa547354c/history. HTML: [/partnerships/sierra-space-x-boeing/history](/partnerships/sierra-space-x-boeing/history)._