Call orchestrator_capabilities, then delegate exactly one async child using shared isolation, full-access runtimeMode, Grok provider model grok-4.7 with low reasoning. Tell the child: Use run_terminal_command to start `sleep 5; echo EARLY_BG_DONE` with background execution enabled, then run `sleep 15; echo FOREGROUND_DONE` in the foreground. Never poll or kill the background task. After the foreground command finishes reply exactly EARLY_SUCCESS_DONE. Do not delegate. You the parent must not poll the child; wait for its completion notification. On the notification call task_status once and report verbatim both the notification summary and task_status.summary. Do not run additional children or tools unrelated to this reproduction.