The seat list's five-minute finding and the finding of a held module are raised as they happen, so they use the held
writer (seeded at Start, Held() answers what stands) over the contract of the seat mesh-conditions; the keepers keep no
set or sweep of their own, and the writer is started before the seat list reader writes or clears any. The engine's own
finding stream stays its foundation stream mesh-host-findings.
Builds: design 47 G §529, A-29, A-30, A-37, A-38, A-40
Claude-Session: https://claude.ai/code/session_01NcbgfGKaxw984XyAPfLm4h