# AGCO Challenger x Topcon Positioning Systems revision history

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

Partnership: [AGCO Challenger x Topcon Positioning Systems](/partnerships/agco-challenger-x-topcon-positioning-systems.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/agco-challenger-x-topcon-positioning-systems/history. REST: /v1/partnerships/24b53fda-923c-4ff5-8a85-f972090bbb42/history. HTML: [/partnerships/agco-challenger-x-topcon-positioning-systems/history](/partnerships/agco-challenger-x-topcon-positioning-systems/history)._