TWO agent results, both recorded; nothing actioned, nothing pushed to NetBox.

>>> RULING A (v6-only on five planes) IS BLOCKED BY UPSTREAM CHARM DEFECTS <<<
RULING B (full GUA) IS ORTHOGONAL AND STANDS -- GUA-vs-ULA is independent of
whether a plane keeps v4, so the carve tool is unaffected and a GUA DUAL-STACK
carve is achievable today. This needs an operator ruling.

RE-VERIFIED INDEPENDENTLY against the shipped ceph-osd rev 953 artifact, because
it decides the ruling. hooks/utils.py:203-217 get_host_ip() returns
get_ipv6_addr()[0] when prefer-ipv6 is set, else socket.inet_aton(hostname) and
on failure dns.resolver.query(hostname, 'A') -- an IPv4-ONLY lookup -- under the
charm's OWN comment "...just let it kill the hook". So ceph-osd fails on a
v6-only plane in BOTH directions: false -> inet_aton raises on a v6 literal then
NXDOMAINs an IN A lookup (LP #2109798, New); true -> bare get_ipv6_addr() (also
ceph_hooks.py:547, WITHOUT dynamic_only=False) returns DYNAMIC/SLAAC only while
every VR1 node holds a MAAS STATIC v6 (LP #2061836 -- Fix Committed on ceph-mon,
New and never fixed on ceph-osd, confirmed absent from rev 953).

Reported from the capture and NOT re-verified here, recorded as such: mysql /
mysql-router bare user:pw@addr URIs invalid for an unbracketed v6 literal;
hacluster 2.4/stable rev 166 (released 2026-06-29) still hard-writes
ip_version: ipv4 though LP #2111852 is Fix Committed -- FIX COMMITTED IS NOT FIX
RELEASED; OVN documenting encap as "The IPv4 address of the encapsulation tunnel
endpoint" with zero v6 encap values in OVN 24.03's test suite.

Counted locally: metal-internal appears 273 times in bundle.yaml across ~44 apps;
rabbitmq-server is DEPLOYED by the bundle but ABSENT from PREFER_IPV6_CHARMS --
the only mismatch across all 33 bundle pairs, where invariant 9a would emit a
factually false message.

APEX CARVE TOOL (netbox/d139-gua-carve.py, 232 lines) + tests/d139-gua-carve
(65 cases, offline stub apex); manifest 94->95. Live dry run: CREATE 22 |
EXISTS 6 untouched | RETIRE-REPORT 18, and it surfaced 52 DEPENDENT ip-addresses
inside the retiring ULA /64s that a later delete would orphan. Proof no write
occurred: apex prefix count 139 before and after. 5 mutations, each turning a
NAMED test red, tool restored sha256-identical.

OWED: (a) the foundational measurement is STILL not taken -- does network-get
return v6 on a v6-only bound space? (b) D-139's "remove v4 LAST, after each is
proven" is UNSATISFIABLE as written; per-plane conversion is atomic.
(c) the rabbitmq-server mismatch.

PROCESS FAILURE, OWNED: the research was written to /tmp and would have been LOST
-- I scoped the agent read-only and gave it no repo path. Rescued, sha256-verified.
STANDING CONSEQUENCE: every agent mandate must NAME A REPO PATH for its findings;
"read-only" constrains what it may CHANGE, not where it may RECORD.

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