Paul's question exposed the blind spot: a closed tab left the agent
waiting out the full timeout. The page now sends a heartbeat every five
seconds while open; the server stamps lastBeat into the state file, and
--wait reports PAGE CLOSED with exit 4 when the beats stop for fifteen
seconds without an answer. The prose defines the fallback ladder:
re-present once through the structured question tool, then proceed
unattended with the assigned direction, stating assumptions.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Paul BakausandClaude Fable 5
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