Why: Ensure implementation authorship is delegated per unit while the primary model remains responsible for planning and delivery management.
Evidence: The focused task-card generation regression went red then green, and git diff --check passed.
Impact: Every repository-writing implementation unit gets a fresh Cursor CLI run; unavailable or failed Cursor work is recorded as a blocker instead of being silently implemented by the primary model.
Refs: .task/feature-goal-first-delivery.md