Handoff: layer2c

Status: completed Timestamp: 2026-04-01T00:10:00Z

Completed

Ported multidj/scan.py: _ACTIVE → deleted = 0, all FROM library → FROM tracks, replaced old table_exists("library") guard with wrong-DB guard + ensure_not_empty(conn)
Ported multidj/audit.py: same schema changes in _fetch_value_counts, audit_genres, audit_metadata; added wrong-DB guard + ensure_not_empty to both public functions
Ported multidj/enrich.py: same schema changes; added wrong-DB guard + ensure_not_empty
Created tests/test_scan.py (7 tests), tests/test_audit.py (6 tests), tests/test_enrich.py (4 tests)
All 17 new tests pass; full suite of 40 tests passes

ensure_not_empty imported alongside table_exists in all three modules
Wrong-DB guard pattern: if table_exists(conn, "library") and not table_exists(conn, "tracks")
test_safety.py left untouched (Sub-agent D's domain)

Nothing — task complete.

N/A