# M9 Retention and Garbage Collection Evidence

- Coverage: union retention policies, newest-backup protection, pins, tombstones,
  referenced-object preservation, garbage collection, and reconciliation safety.
- Full verification: `make check` passed with 86 unit/contract, 42 integration,
  11 fault, and 17 security tests, plus Ruff, mypy, frontend typecheck, and
  frontend production build.
- Scope: remote source support remains M10 work.