T19-T23 all ran at the default --dc vr1-dc0, so the dc1 v6 bands
(f03:11::/64, :320::/64, :321::/64) were resolved by no case at all. The
renderer's first real output is per-DC overlays, and a gate observed in
only one DC mode is the same only-ever-seen-one-way untrustworthiness
T16/T18 exist to rule out.

T29 resolves the dc1 bands and passes. T30 proves a dc0 v6 leg under
--dc vr1-dc1 FAILS, so a cross-DC copy-paste of a rendered overlay
cannot pass -- the v6 analogue of T15.

Also verified rather than assumed: the checker's NEW exit-2 refusal
(dual-family vip + unreadable apex) is classified correctly by preflight.
P2 rc=2 is already ruled could-not-evaluate -> FAIL (preflight.sh:36,81)
and harness case T14 locks it, so a refusal can never downgrade to a
warning. No change needed there.

Harness 28 -> 30. Gauntlet ALL GREEN (84) on vcloud; repo-lint 0 fail /
605 files scanned.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01HvCyrwvYTTcDYnRErfMsNf