# Saiph revision history

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

Model: [Saiph](/models/saiph.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://www.vastspace.com/updates/vast-selects-impulse-space-for-haven-1-space-station-propulsion","title":"Vast Selects Impulse Space for Haven-1 Space Station Propulsion","sourceName":"Vast (primary)"}]) (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/saiph/history. REST: /v1/models/adf79eb5-3b0e-404f-8564-c7c5bcebd962/history. HTML: [/models/saiph/history](/models/saiph/history)._