The runner arms, before it puts an ask on a build seat's work queue, a key of its new state bounds (key-ttl) for five
minutes, deletes it when the holder's ask-taken is heard, and ends the step could not run naming the seat when the bus's
marker of the key's expiry is heard: no timer, and no look at the seat list.
Builds: design 47 G §32, §535, §602, §647, A-77, A-104
Claude-Session: https://claude.ai/code/session_01NcbgfGKaxw984XyAPfLm4h
jschoubben
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