Option D half 1: explicit base on all 56 apps, gated by new invariant 12 ...

PROVEN AGAINST THE REAL MODEL, NOT INFERRED. The earlier one-app test only
showed the error MOVING to the next app. The fully-based bundle was staged as a
throwaway on the rack and --dry-run against the LIVE 23-application model --
the same command that errored on barbican 265-vs-261 -- exits 0.

Subordinates are in scope, measured: mysql-router is 1154 at 22.04 and 1178 at
24.04. hacluster sharing rev 166 across both bases is not a property to depend
on.

TWO SILENT UNDER-MATCHES, both caught by cross-checking the edit against the
parsed file rather than by review:
 (1) a first pass keyed on the block form inserted 44 of 56 -- the twelve
     -hacluster apps are single-line FLOW MAPPINGS. The inserter asserts its
     app list equals what yaml.safe_load sees, and refuses otherwise.
 (2) overlays/dc-ha-scaleup.yaml DEFINES vault-hacluster, an application that
     exists nowhere in bundle.yaml, and it had no base. That overlay is a LATER
     deploy step, so this would have re-opened the trap AFTER the deploy
     succeeded. Found by the new gate on its FIRST run, in a file the fix was
     not looking at -- the same later-step-overlay class as the ceph-mon miss
     earlier today.

INVARIANT 12 (NEW): every application carries an explicit base equal to the
bundle's OWN default-base -- keyed on that value, not a literal. A bundle with
no default-base REFUSES rather than passing vacuously. Without this, deleting
the 56 lines is a byte-identical PASS and the trap returns at the next partial
failure, at any DC.

Five cases, each mutation-proven individually (harness 50 -> 55/55): neutering
nobase kills T49/T50/T52, wrongbase kills T51, the refuse branch kills T53.

Gauntlet ALL GREEN (93); repo-lint 0 fail.

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

Fix a defect in my own build: invariant 9a was VIP-scoped and the charm list was short ...

Found by a repo-wide grep, not by any gate. Two faults, one cause -- I
measured and gated the population the QUESTION named (the 13 VIP charms)
rather than the population the INVARIANT covers (every application juju
validates).

(1) PREFER_IPV6_CHARMS was WRONG. Re-measured across ALL 33 charms in
bundle.yaml: TWELVE declare the option, not seven. The five missing are
ceph-mon 491, ceph-osd 953 (squid/stable), nova-compute 894, hacluster 166
(2.4/stable) and mysql-innodb-cluster 164 (8.0/stable).

(2) 9a was written INSIDE the VIP loop, so an application with no vip never
reached it -- and the repo ALREADY has that case:
overlays/dc-dc-ipv6-family-matrix.yaml sets prefer-ipv6 on ceph-mon, which
carries no VIP. That overlay is a LATER deploy step, so the miss would have
passed attempt 2 cleanly and surfaced at the step after, looking like a new
fault.

9a now runs over EVERY application, before the VIP loop; the VIP loop skips an
app 9a already flagged so the diagnosis is not doubled. ceph-mon's own in-file
claim of the option is now INDEPENDENTLY VERIFIED from the artifact rather
than taken from the comment.

Harness 48 -> 50/50. T47 (non-VIP app whose charm lacks the option FAILS) and
T48 (ceph-mon PASSES) both mutation-proven: re-scoping 9a back to the VIP loop
kills T47; dropping ceph-mon from the list kills T48.

Gauntlet ALL GREEN (93); repo-lint 0 fail.

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

Build the 2026-07-31 ruling: renderer + invariant 9 replaced, overlays re-rendered ...

Three parts, all mutation-proven.

(i) provider-bundle-check.py gains PREFER_IPV6_CHARMS -- the measured authority,
keyed by CHARM name, carrying the revisions and a re-measure warning -- and
invariant 9 is REPLACED, never deleted:
  9a  prefer-ipv6 on a charm that does NOT declare it FAILS. Asserted on
      PRESENCE, not truthiness: 'prefer-ipv6: false' is the same fatal
      'unknown option' to juju as true.
  9b  on a DECLARING charm it still travels with the v6 legs -- the L3-9
      protection is retained unchanged for those seven.
  9c  arity.
The old text's mechanism claim ("prefer-ipv6 makes HAProxy bind :::port") is
refuted by this session's measurement and is recorded as such in-file.

(ii) render-dc-overlays.py emits the option only for a declaring charm, READING
the set from provider-bundle-check with ast rather than restating it (the same
rule APP_OCTET already uses). render() keeps its purity property: the set is a
PARAMETER and the default REFUSES rather than defaulting to empty, because an
empty set renders a plausible artifact with the option nowhere. Both overlays
re-rendered: exactly SIX lines removed per DC and nothing else -- every vip
string byte-identical, so all v6 legs are retained.

(iii) tests/provider-bundle-check 44 -> 48/48. T43 reproduces the attempt-1
defect; T44 proves presence-not-truthiness; T45 is the positive control; T46
asserts the DIAGNOSIS.

MUTATION PASS -- six mutations, every one killed tests. And one NEW assertion
was found to be DECORATION and was REPLACED rather than kept: T46's first form
could not fail under any mutation, because a non-declaring charm with no option
reaches neither branch. Re-written to catch the fold-9a-into-9b simplification
and re-proven.

Gauntlet ALL GREEN (93); repo-lint 0 fail. The fixed dc0 deploy input now
sweeps CLEAN on option names: 75 assignments, 20 schemas, 0 unknown.

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

Four gate-integrity defects fixed, each demonstrated RED then GREEN ...

The rule is that a checker which cannot fail is not a gate -- and its inverse, that a gate only
ever seen failing is equally untrustworthy. So each item carries both a fixture proving it goes
red on the defect and a run proving it goes green on the real tree.

4.2 DECORATIVE HA. cluster_count was asserted nowhere against 20 occurrences in
dc-ha-scaleup.yaml, so rewriting all 20 from 3 to 1 produced a byte-identical PASS. Verified
independently here rather than from reported output: the same rewrite now yields 13 DECORATIVE
HA failures, and the real overlay still passes. Missing cluster_count and the scale-down
direction fail too.

4.3 The machines overlay can no longer be a silent no-op -- missing, gutted and mis-keyed each
fail with distinct messages, the mis-keyed one under either --dc. A bypass was caught on review
before delivery: the check first sat inside the role_sep branch, so an overlay stripping every
tags= made the whole placement block self-skip behind an [ok]. Hoisted out and locked by a case.

4.7 cloud-assert gained an arity check covering 14/14 scaled apps, discovered from status JSON
and measured against a real captured juju-status.json. It refuses on an unreadable value rather
than passing, and single-unit ovn-central is no longer "uniform".

4.8 G17 has a real node-side check: dc-cache-proxy.sh node <site> content-asserts proxied
archive and UCA Release fetches, carries R12's chronyc time-source assertion, and adds exit
3 = REFUSE. Stated honestly: its green is a FIXTURE green -- no node has run it, the nodes are
powered off, and G17's window is Stage-5 first boot. G17 stays OPEN.

THE GAUNTLET NOW AGREES ON BOTH HOSTS. The voffice1 "drift" was pure locale collation; LC_ALL=C
now applies to the sort and to both sides of the compare, deliberately without re-recording
HARNESS-MANIFEST, which would have moved the failure to vcloud. The snap test takes a pre-state
reading instead of asserting snap-absence. Verified as final arbiter: ALL GREEN (88) in the
default locale AND under LC_ALL=C, identical.

AN AGENT CONCLUSION CORRECTED RATHER THAN ACTED ON: it logged that preflight P2 should also
assemble dc-ha-scaleup.yaml. Measured, that is wrong -- the overlay is deliberately excluded
from the Step 4 deploy per R6, and no step anywhere applies it yet. Adding it to P2 would make
the gate validate an input the deploy does not use, exactly the chain-audit defect in reverse.
Logged, not executed.

Disclosed deviation, verified harmless: the agent used git stash despite that being forbidden.
Checked because other agents were writing concurrently -- stash list empty, prior commit intact,
D-133 guard still holding, modified set exactly its declared files.

repo-lint 0 fail / 618 files.

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

D-136 step 6: the chain audit -- R9's drift gate built, three refusals, two dead cases ...

Three read-only lenses over data source -> renderer -> deployment mechanism,
the ruled final step of D-136 option (D). Lens 3 was adversarial and made
the chain produce wrong-but-green THREE times, all executed.

All three converged on one root cause: dc1's overlay was byte-gated and
dc0's was gated by nothing. render/values/ was referenced by zero scripts
and zero harnesses, while preflight P2 feeds the deploy gate dc0's overlay.
R9's render-drift check had been RULED and never built.

Executed wrong-but-green:
- transposing two apps' octets in the dc0 overlay (consistent, in-band,
  correct prefixes) -> PASS
- changing ONE WORD, family: dual -> v4, silently reverting dc0 to IPv4-only
  against R2's ruling -> PASS, because dropping prefer-ipv6 and the v6 legs
  together satisfies invariant 9, and vip_dual is printed but never asserted

tests/render-drift/ is R9's gate, built. It iterates render/values/*.yaml,
reads each file's own output: field (inert until now), renders and
byte-compares. A new per-DC values file is gated the moment it is committed.
Non-zero floor plus a proof-of-teeth case that mutates a copy and requires
red.

Three refusals where the chain took the last writer silently:
- duplicate (role, kind) in the apex, in BOTH readers. Appending one spare
  prefix -- routine IPAM work -- re-homed every dc0 VIP into a different /64
  and went green, because the gate checks overlay-vs-apex agreement and both
  sides read the same wrong value. The winner depended on JSON array order.
- duplicate app name / duplicate octet / out-of-band octet in APP_OCTET. A
  duplicate name emitted two YAML blocks, safe_load kept the last, and one
  app's ruled octet vanished with nothing red.

Two harness cases that could not fail:
- T3b's byte-compare was CIRCULAR -- header derived --from-overlay $LIVE
  then compared --against $LIVE, so a third of the bytes were self-copied.
  Proven by rewriting a header line to a false claim and still matching.
- T29's own fixture was inert; its assertion held from the overlay alone.

OWNED: my first T29 re-point asserted a --show-legs flag THAT DOES NOT
EXIST. I invented an interface instead of reading one. The harness caught it
immediately; replaced with real behaviour and recorded rather than quietly
fixed.

Gauntlet ALL GREEN (86) on vcloud; repo-lint 0 fail / 612 files. The larger
deploy-path half is logged not actioned -- see the changelog, items 16-25.

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

VIP arity gap CLOSED + R11's three ruled gate changes executed ...

provider-bundle-check.py could not express what R2 and R11 already ruled:
:137 required exactly 3 addresses per vip (a dual-family VIP is 6, so it
would have failed EVERY application) and :149's octet extraction returned
the whole string on a v6 literal, leaving every v6 leg trivially unique
and unchecked. The apex now holds the dual-family set a renderer will
emit, so the only gate that validates overlays could not validate what is
about to be produced.

Arity: a vip is now a v4 triple OR a dual-family sextet. The v6 legs are
validated against the per-DC v6 /64s READ FROM THE APEX RECORD (D-136
option (D)), reusing dc-plane-ipam.sh's (role, kind) keying -- the
provider leg takes the dedicated GUA VIP /64, admin/internal their plane
/64s. The v6 host part must MIRROR the v4 octet textually. prefer-ipv6
and the v6 legs are COUPLED in both directions: the measured L3-9 finding
is that the merge order which keeps prefer-ipv6 while dropping the v6
legs is the one that exits 0. An unreadable apex REFUSES at exit 2; a
v4-only bundle needs no apex.

R11 (D-020 amendment, ruled 2026-07-27), same pass: band 50-60 -> 50-99
in both separately-named sites; VIP_COUNT_EXPECT 11 -> 13;
EXPECT_PUBLIC_VIP deliberately stays 11 (measured -- neither vault nor
designate has a public binding); and an hacluster principal with no vip
now FAILS, since cluster_count is asserted nowhere and a 3->1 rewrite of
all 20 values produces a byte-identical PASS.

Measured consequence, not glossed: two sub-checks flip PASS -> FAIL
(designate's missing VIP; CHECK 1 at OK=11 want 13). preflight was
ALREADY exit 1 before this change and is still exit 1 after -- no deploy
path that was open is closed. Both reds are the ruled gate reporting real
work owed; per R6 the .61/.62 VIPs land before the HA overlay.

Harness 15 -> 28. Three cases RE-POINTED rather than deleted: the fixture
base splits into a pristine repo bundle and one carrying designate's
ruled .62, with new case T16 asserting the pristine bundle DOES trip the
new invariant. When .62 lands, T16 gets re-pointed, not deleted. Proven
able to both fail and pass on the same check (T16 red / T18 green).

Gauntlet ALL GREEN (84) on vcloud; repo-lint 0 fail / 604 files scanned.

Scope was operator-gated: "Fix the arity gap first, then start the
renderer", with the arity-alone vs arity-plus-R11 fork put separately and
answered "Arity gap + R11's three ruled changes (Recommended)". OPS under
GA-R3, no D-number.

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

vr1-dc1 bundle render (9-node role-separated) + expansion review record ...

Render (committee Fork-2 hand-render), validated by the extended checker:
- bundle.yaml: machines "8"-"11" (tags=openstack) -> "0"-"8" role+DC tags (block
  style); every `to:` re-homed (quorum trio -> control 0/1/2; nova-compute 3->2 on
  compute 3/4; ceph-osd -> storage 5-8; scaled apps + utilities -> control);
  ovn-chassis -> the 2 dc1 compute provider MACs (52:54:01:d1:04:02/05:02).
- overlays/vr1-dc1-machines.yaml (NEW): per-DC retag (machines-overlay merge is
  VERIFY-LIVE at `juju deploy --dry-run`).
- overlays/dc-ha-scaleup.yaml: tokens rendered to logical control ids 0/1/2
  (DC-neutral); header updated; stale ceph-osd-3 comment -> 4.
- provider-bundle-check.py: ovn-chassis MAC check skips the VR0 Pattern-A set on a
  role-separated bundle (the validator CAUGHT a real YAML flow-comma render bug).

Validated: base + FULL dc1 deploy input (3 overlays, --dc vr1-dc1) PASS; harness
15/15; gauntlet ALL GREEN (78); repo-lint 0-fail.

Expansion review (3 read-only reviewers) recorded in
docs/audit/stage5-expansion-review-20260724.md: relations/bindings/subordinates
HOLD under role-sep (uniform 6-NIC, SEC-011); no channel/pin change; open
resolve-before-deploy items (vault VIP, v4-vs-dual-stack phasing) + deploy-gate
script gaps + VERIFY-LIVE gates. NetBox->deploy coupling routed to Chat as a new
PROPOSED D-number (Fork-2 escalation). No cloud state mutated.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01VUjEb7onHpdqFHUnio6iVw

provider-bundle-check: overlay merge + per-DC VIP bands + placement invariants ...

The committee's non-negotiable placement "spine" so the vr1-dc1 render is
machine-checked, not eyeballed. The checker was placement-blind (D-052 bindings
+ mysql=3 only), so any render could silently ship decorative HA.

- --overlay FILE: juju-like merge -> validates the EFFECTIVE deploy input
- --dc vr1-dc0|vr1-dc1: per-DC VIP bands (default dc0 = base; un-param run
  byte-identical to before). Closes the dc1-VIP-outside-the-check gap.
- placement invariants (fire only on a role-separated machines block, self-skip
  on the base bundle): no dangling to:; LXD->control, ceph-osd->storage,
  nova-compute->compute; num_units>=2 spread across that many DISTINCT machines
  (anti-affinity); ceph-osd==storage count, nova-compute==compute count.

Harness 15/15 (7 new behavioral cases); gauntlet ALL GREEN (78); repo-lint 0 fail.
Machines-block overlay merge is confirmed at `juju deploy --dry-run` (VERIFY-LIVE).

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01VUjEb7onHpdqFHUnio6iVw

Patches

D-060: revert to Pattern A; supersede D-057/D-058 ...

Revert provider NIC to Pattern A (MAAS-built OVS br-ex) on the existing D-052/D-053 scheme. bundle.yaml clean bf7de5a checkout (provider-public x11, VIP triple .4/.8/.12, all 4 br-ex MACs); lib-net.sh + carve back to D-052/D-053; NEW provider-bundle-check.py gate; standup retargeted; teardown.sh + teardown runbook updated. Retire: phase-00-maas-recidr.sh, provider-vip-standup.sh, d057-bundle-check.py, and the 3 provider-vip/reconfigure runbooks.