- registry: parent_job field, register --parent-job fails closed on an unknown parent, children_of/descendants_of, list --parent - wrapper: --parent-job; $MAM_JOB_ID default (ignored with a warning when this registry lacks it); brief line and one sentence at the end of the injected instructions - create_session: the onboarding instructions carry the same sentence Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>