# Contour Crafting x Quikrete (Concrete 3D Printing) revision history

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

Partnership: [Contour Crafting x Quikrete (Concrete 3D Printing)](/partnerships/contour-crafting-x-quikrete-concrete-3d-printing.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/contour-crafting-x-quikrete-concrete-3d-printing/history. REST: /v1/partnerships/71c25dcc-37b8-4999-b094-2aa9e90a090a/history. HTML: [/partnerships/contour-crafting-x-quikrete-concrete-3d-printing/history](/partnerships/contour-crafting-x-quikrete-concrete-3d-printing/history)._