Co-authored-by: Brendonovich <14191578+Brendonovich@users.noreply.github.com>
Persist background Job ownership and terminal results across server restarts. Resume existing subagent Sessions, admit shell cancellation notices without waking idle parents, and preserve explicit cancellation.
Extract physical-attempt streaming, tool execution, and durable settlement from the Session runner. Preserve logical-Step retry and recovery policy, use tagged drain outcomes, and fix multi-click selection during auto-copy.