# Momenta MSD (Fully Data-Driven) revision history

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

Brain: [Momenta MSD (Fully Data-Driven)](/brains/momenta-msd.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 brain, see the brain 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: /brains/momenta-msd/history. REST: /v1/brains/e761ff37-d136-48f5-adf2-bdf8f1936db4/history. HTML: [/brains/momenta-msd/history](/brains/momenta-msd/history)._