A site's nodes stayed a release behind after its control plane was
upgraded, with nothing printed to say so. ctl upgrade checks every node's
version once the waves are done, fails naming any not on the release, and
says when the control plane has no nodes registered. llmgw upgrade on a
control plane, which looks like the cluster's upgrade and is not, says how
many nodes it left behind and the command that upgrades them.
Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>