# Ames National Laboratory x Amazon Critical Materials revision history

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

Partnership: [Ames National Laboratory x Amazon Critical Materials](/partnerships/ames-national-laboratory-x-amazon-critical-materials.md)

## Recorded posture

- First recorded event: 2025-01-01
- Last material change: 2025-01-01
- Material event count: 1
- Editorial event count: 0

## 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.

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