Under the hood
Control-plane telemetry events and related state were removed from the app
What
The control_plane_publish and control_plane_started telemetry event names were removed from the allowed list of events Claude Code can send. Separately, the controlPlaneArmed and controlPlaneSlugs fields were removed from an internal state object used for template lanes.
Why
Removing these means Claude Code no longer tracks or reports on this control-plane activity; whatever functionality generated these events and this state appears to have been retired.