Operator: "Close the remaining gaps". All three measurable items are now
measured; what remains open is blocked by a known missing credential or is a
deliberate deferral, and both are stated with cause rather than left implicit.

U15 -- voffice1 transit addressing is REBOOT-DURABLE. A positive result, which
is worth recording as clearly as a defect: live enp2s0 172.31.0.1/30 (dc0 leg)
and enp3s0 172.31.0.5/30 (dc1 leg), both netplan-persistent via
/etc/netplan/60-transit.yaml and 61-transit-dc1.yaml. The D-128 Plane-2 path
survives a headend reboot and no site-baseleg row is owed for it.

U16 -- RETROFIT_WAIT=30m has NO recorded provenance. git log -S traces it to a
single bulk commit ("New Phase Scripts") with no rationale, and a repo-wide grep
finds no constant anywhere in scripts/ documented as nested-virt or depth-4
calibrated. It is an inherited default that has never been validated against the
nested I/O it will actually run on at Stage 5 Step 9. Log-only, but it should
not be mistaken for a tuned value. Bonus finding from reading the file: that
script's own preconditions require BOTH the openstack and juju clients, and no
host currently has both -- vcloud has neither, voffice1 has juju only. It cannot
run anywhere today, which reinforces S-1.

U17 -- the DC data path carries NO IPv6 at any layer measured. On BOTH racks:
zero global v6 addresses on any plane bridge, no v6 default route, and
accept_ra=1 (so they would accept a router advertisement; none is arriving).
Combined with the existing measurements -- no v6 subnet on any of the 12 MAAS
plane fabrics, no v6 link on any of the 18 nodes -- this is a THREE-LAYER
confirmation of L2-3. It also WIDENS the R2 propagation task: it is not only
"carve into MAAS", the rack bridges have no v6 either.

STILL OPEN, with cause rather than silence: the two DC edges' own interface-level
v6 configuration. dc0 is blocked by a known missing credential, not by a failure
to look -- ~/vr1-dc0-creds/ contains no opnsense-api.txt while ~/vr1-dc1-creds/
does, which is SEC-021(a) directly visible on disk, the residual item the
2026-07-27 consolidation batch deliberately excluded because the re-mint is a
live edge mutation. dc1's API is credentialed but measured unreachable from
vcloud (timeout; the path runs from the rack, where the edge creds are correctly
not staged per SEC-015). U17 answers the substantive question from the rack side.

repo-lint/gauntlet ON voffice1 remain deliberately deferred until precondition
0.1 advances that clone -- running them against a 105-commit-stale tree would
produce a number that means nothing. That is a judgement, not an omission, and
it is recorded as such.

Revert: git revert this commit; register and CURRENT-STATE changes are additive.

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