# Rigel revision history

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

Model: [Rigel](/models/rigel.md)

## Recorded posture

- First recorded event: 2026-06-07
- Last material change: 2026-06-07
- Material event count: 1
- Editorial event count: 0

## Material events (1)

- **2026-06-07**: created (source: [{"url":"https://spacenews.com/impulse-and-relativity-target-2026-for-launch-of-first-mars-lander-mission/","title":"Impulse and Relativity target 2026 for launch of first Mars lander mission","sourceName":"SpaceNews"}]) (verified)

## 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/rigel/history. REST: /v1/models/e80a98cd-5913-489c-b124-c1cbda1c0b1e/history. HTML: [/models/rigel/history](/models/rigel/history)._