Why: U1 of the regulations KB plan requires a verified import inventory before any schema or ingestion work. Evidence: dump sha256 matches manifest; 2878/2907 originals hash-verified in a disposable pgvector container (SELF). Impact: Spec only; no corpus data or product code changed. Refs: docs/superpowers/plans/2026-10-18-regulations-knowledge-base-plan.md U1 Co-authored-by: Cursor <cursoragent@cursor.com>