# Amazon x Constellation Energy (Calvert Cliffs 20-year nuclear PPA) revision history

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

Partnership: [Amazon x Constellation Energy (Calvert Cliffs 20-year nuclear PPA)](/partnerships/amazon-x-constellation-energy-calvert-cliffs-ppa.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/amazon-x-constellation-energy-calvert-cliffs-ppa/history. REST: /v1/partnerships/f23f1b55-6981-4d07-b672-b891d781049e/history. HTML: [/partnerships/amazon-x-constellation-energy-calvert-cliffs-ppa/history](/partnerships/amazon-x-constellation-energy-calvert-cliffs-ppa/history)._