The review of 2026-10-09 (M4): the prompt and its message were the caller's free text, so whoever could
ask the verb could put any words before the operator. The verb now takes the module, the secret and the
machine, checked as names, and writes the prompt here, saying the mesh's controller asks — which the bus
makes true, denying the verb to every other principal (mesh-controller #156). prompt and message are refused.