Launch exactly one general-purpose Agent with run_in_background true, description "Self resume probe", model haiku. Give the child this exact instruction: Use Bash with run_in_background true to execute python3 -c 'import time; time.sleep(30)'. Immediately return exactly WAITING. When you receive the completion notification of that background Bash command, run four successive separate foreground Bash commands, each executing python3 -c 'import time; time.sleep(15)'. Do not combine them and do not run them in background. Finally return exactly DONE_SELF. Parent: after launching the child answer exactly LAUNCHED and stop. When notified of WAITING, acknowledge it briefly and stop; do not resume or message the child yourself. Allow the child to handle its own background command completion notification.