Controller v0.237.0-v0.238.1: the Update button is a guarded job — refusals, backup-first when the
proven Tier-2 copy is stale, safety dump, pin, pull (pin back on failure), health, HOLD on failure.
Proven live on demo-hp: A, B, E, F, H and the restore walk (audits/slice4-2026-09-13/).
Correction to this morning's pages: between golden bakes the hub HOLDS a floor above the vouched
golden, so a release does not reach the fleet by floor (R-472, operator decision). Corrected in the
runbook, STATUS, CONTEXT, R-468 and the gate docstring.
Claude-Session: https://claude.ai/code/session_0159rPz1ZhFKsS53msqPYxtS
