# Columbia University x Amazon AI Research Center revision history

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

Partnership: [Columbia University x Amazon AI Research Center](/partnerships/columbia-university-x-amazon-ai-research-center.md)

## Recorded posture

- First recorded event: 2026-08-22
- Last material change: 2026-08-22
- 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.

_Canonical URL: /partnerships/columbia-university-x-amazon-ai-research-center/history. REST: /v1/partnerships/e6bbf885-7421-45ac-8c2e-e2cdeea7d317/history. HTML: [/partnerships/columbia-university-x-amazon-ai-research-center/history](/partnerships/columbia-university-x-amazon-ai-research-center/history)._