DL-451

Board freshness: the runtime syncs subagents automatically from the root subagentEventBus, steers one mid-turn reminder past 20 minutes, and after a working turn with no board write starts exactly one re-prompt turn that never starts another

Status: Active (Matt, 2026-10-10)

Record: ../../agent/compass-agent-status-record/design.md#d4-freshness-runtime-writes-a-mid-turn-nudge-and-a-turn-end-re-prompt