mesh-broker's verbs are all optional now and the composition grants its reading verbs to its
holder, so taking one from a membership loses no holder: the rows that prove a lost last holder
is held back name a seat the catalogue defines without verbs, claimed by the bus module beside
mesh-broker.
Claude-Session: https://claude.ai/code/session_01JG73KJNrH5EgFXMKKYSrig