Detach capture and process listeners after an adapter releases ownership.
Latest bounded output and exit observation.
Stop an owned process once; concurrent callers share the same escalation.
Wait for process exit up to a caller-owned bounded interval.
Supervises only generic process resources; wire protocol remains adapter-owned.
Output retention is bounded per stream while byte totals remain exact. Stop first honors token-verified group cleanup when supplied, otherwise it uses a bounded TERM-to-KILL escalation for a directly owned child.