Research frontier
EVIDENCE / 19 SEP 2026

Exact replay is not external truth.

Narrows

Meta's Muse Code makes every model call, tool run, approval and edit part of an append-only event log for exact replay and crash-safe recovery. That establishes runtime reproducibility—not that the log is complete, authority remained valid or the claimed effect occurred in the world.

  1. 01

    Preserve verification state through summary, memory and handoff.

  2. 02

    Record source independence, custody, coverage and method.

  3. 03

    Treat missing verification metadata as indeterminate.

TIG-BenchTrajectory RuntimeAttestation Fabric
Meta — Introducing Muse Code and Muse Spark 1.2Meta — Muse personal AI agent