Why: The task card still said C4 and C5 had not run, which would make the pull request describe the wrong result. Evidence: B6, C4, and C5 receipts already on the card (SELF). drill_driver tests pass after grouping the imports. Impact: The card now states K4 failed and second-instance writes stay closed. No product code change. Refs: feature/u7-ops-drills Co-authored-by: Cursor <cursoragent@cursor.com>