Why: feature/u7-ops-drills is in origin/main and its task card was still open.
Evidence: merge 089862084f is PR #491. task-finish exit 0, receipt /tmp/u7-ops-drills-finish-4.json (SELF).
Impact: only this card moves to .task/archive/. Other open cards stay open.
Refs: feature/u7-ops-drills
Co-authored-by: Cursor <cursoragent@cursor.com>