Each outcome is a seat event <seat>.<event> on the shared events stream (the lead's ruling of 12:4x), heard on the builder's events consumer through its consumes; the subjects are mesh-contracts'. A restarted builder takes its floor waits in again, so its silent sources' events still wake them; builder_floor_waits reads them. Claude-Session: https://claude.ai/code/session_01JG73KJNrH5EgFXMKKYSrig