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PD changes through the tablet's hub reset the USB link for 5-12 s at every ignition change. The app still re-dials, but the Orin must notice dead clients by heartbeat (TCP alone leaves half-open sockets), keep pending reliable traffic to redeliver or expire by age, and accept idempotent commands so retries across reconnects never act twice. Recorded as proposed decision 24; no implementation yet. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>