WC8: canonical.prune_stale (drop de-enrolled warm data + volumes) wired into the nightly sweep + df log; consolidated evidence (DRONE_RUNNER_CAPACITY=MAX_TESTS serialize; autoPrune drops --volumes so warm vols survive; cold teardown sacred; warm excluded from D8 — no nix source ref). +1 unit (72 pass). WC9: docs/warm.md documents the full warm/quick model; --quick rollback proof already proven live (W2 FAIL restores exact known-good; WC4 PASS byte-identical snapshot). On PASS, all WC1-WC9 (incl WC1.1/WC1.2) verified → DONE. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>