Why: Preserve the user-approved stage-7 conclusion before the final merge candidate is frozen. Evidence: Import original precheck, sync, build, CI and independent replay receipts; validate current fixed components, document links and the incoming acceptance script syntax through make evidence. Impact: Update this task card only; preserve implementation and activation boundaries. New HEAD CI remains required before merge. Refs: Dev PR #519; Guidelines PR #5; Documents PR #96; queue Issue #518