Updated by fix-consistency on 2026-09-15:
- update .custodian-brief.md for flex-auth
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FLEX-WP-0020 T01-T03: fresh preflight is zero-blocker, repository-only
scope is FLEX-DEC-2026-013, concurrent work is FLEX-DEC-2026-014.
T04 handoff requests are posted; owner work-records are still required.
T06 stays behind the exact human confirm string and a post-commit preflight.
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FLEX-WP-0022-T03: the rules already refused a foreign tenant; the fixture
suites never varied the field. No policy or version change. Asked
tenant-engine to name the CheckRequest tenant relation for T01/T02.
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Updated by fix-consistency on 2026-09-15:
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CI image 8007ede@sha256:6da9543d02ff556d5d5e33624599eb26b73ef365ed0e1ee2fac2ad7703b7dcba
now serves examples/informed-decision-sitting. T03 deployment is unchanged.
Native caller checks pass with synthetic identities; human bind stays with
INFD-WP-0002.
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Seven exact-record pins from the 2026-09-15 sitting-create receipt.
c01 is omitted. Identity bar matches T03. 147 local evaluator checks
pass. Deploy waits on a CI image that contains the new package.
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Set flavor on open workplans from origin/prose/status. Copy existing
depends_on aliases only. Do not promote residuals.
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Updated by fix-consistency on 2026-09-14:
- update .custodian-brief.md for flex-auth
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Detached Ed25519 over the canonical envelope with signature omitted.
Unsigned is stated, not implied. Testdata fixtures prove verify and
tamper failure without minting a production key. FLEX-WP-0025 is
finished with the validate check from the previous commit.
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FLEX-WP-0025-T03: flex-auth validate flags input.*.attributes keys that
no sibling registry or manifest supplies. A broken testdata package
proves tests can pass while the ceiling remains caller-only.
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Updated by fix-consistency on 2026-09-14:
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FLEX-WP-0025-T01/T02: keep merged attributes, add registry/asserted
namespaces later, and declare the remaining ceiling keys so no
published allowlist is unbacked. T03 stays waiting on validate.
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Updated by fix-consistency on 2026-09-14:
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FLEX-WP-0023-T04: provenance.caller is additive (mode required;
principal/audience/not_after when a token was reviewed). TokenReview
keeps the JWT exp. request_digest is unchanged because the caller is
not binding material.
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Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
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secrets-engine's first live request rejected our allow: binding.
request_digest is computed over material they never sent, because we
enrich subject and resource from the registry before hashing. Answering
that meant reading the enrichment path, which had a worse defect in it.
Enrichment was additive-if-absent — addAttribute wrote a registry value
only where the request had no value for that key. So where a caller
supplied a key, the caller's value won and the registry's never applied.
Every registry ceiling and allowlist was advisory. Verified against the
shipped ops-warden package, each one added key on an otherwise-denied
request:
max_ttl_hours: 99 registry says 8 -> allowed a 12h certificate
allowed_principals registry allowlist -> disallowed_principal bypassed
allowed_subjects registry allowlist -> unknown_subject bypassed
The third is the one to read twice: a subject the registry does not know
authorized itself by naming itself in the allowlist it was being checked
against.
Not remotely reachable today — the PEP builds the CheckRequest,
ops-warden sends no resource.attributes, and enforce admits one identity.
It is a defence-in-depth failure: any path that lets attacker-influenced
data into a CheckRequest field became a full policy bypass rather than a
bounded input problem. Callers sending resource.attributes is not
hypothetical; secrets-engine does it on every request.
Registry facts now win, and diagnostics.registry_overrode names every
displaced key, because a registry that silently discards a contradicting
claim hides that a caller asserted authority it did not have.
subject.type is carved out, and the reason is a finding of its own.
Making the registry win there denied every secrets-engine allow: the
registry's type is CARING vocabulary (Human, Agent, Automation, Service)
and the request's is the protected system's actor vocabulary (service,
adm, agt, atm). Two fields sharing a name; substituting one for the other
is translation rather than identity, which GH-DEC-2026-008 ruled against.
Note what surfaced it — the registry's type had been dead data since the
field existed, because the caller's value always won.
Also publishes binding.submitted_request_digest, over the request exactly
as sent. request_digest was published as the consumer replay test and
cannot be one. Nothing is lost hashing the pre-enrichment form:
enrichment is a function of the request and the snapshot, and
registry_snapshot_digest already pins the snapshot.
Existing pins do not move. All three replay fixtures' request_digest and
approval_binding_digest values are byte-identical — those requests
contradict no registry fact. A field to add, not a value to correct.
Regression tests verified failing against the old behaviour before being
kept. FLEX-DEC-2026-012; FLEX-WP-0025 carries the residual, that a policy
still cannot tell a fact from an assertion.
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Updated by fix-consistency on 2026-09-07:
- update .custodian-brief.md for flex-auth
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gate-house circulated security-layer-model v0.8 for assent. Assent given
with four findings; F1 is fail-open and blocking for calling the section
6.4 PEP obligations complete, though not for anyone's adoption — the
condition already exists under v0.7 and is not created by this version.
F1. "A decision from access-engine" is not a checkable predicate. 6.4
obligation 1 requires a PEP to hold one; obligation 2 supplies a test it
is emphatic is mechanical and not a judgement call. That test establishes
which request a decision is for and nothing about who issued it, because
every input to every digest a PEP can check is either sent by the caller
or published. A responder knowing the package id and version reproduces
all three exactly.
What makes it sharp is internal: 9.4 requires the approval object to
carry authenticated entries, and 6.4 obligation 5 then requires each
artifact be validated against its owning layer, naming the approval-claim
and DecisionEnvelope pair as the live instance. So the obligation is
unsatisfiable for half the pair it was written about — a PEP can validate
the approval's authenticity and cannot validate the decision's. The
asymmetry is argued nowhere.
Section 16 already carries this observation one layer up, about the
standard's own publication path having no digest or freeze discipline.
Applied to the artifact the standard regulates, it is F1. The gap was
visible from inside and got recorded against the wrong artifact.
F2 answers the absent-vs-unknown question gate-house flagged as ours.
Runtime behaviour must be identical — absent fails closed too, and for a
stronger reason, since it is the branch reached by discovering your model
of your own scope axis was wrong. But omitting the distinction makes
totality unfalsifiable: a map with an unknown catch-all satisfies 6.4
obligation 3 vacuously, and its drift test passes by exercising the
catch-all rather than the axis. Same defect we published as
FLEX-DEC-2026-008 — coverage counted rather than executed, in a stance
map instead of a fixture suite.
F3. "The published map MUST equal the shipped behaviour, and that
equality SHOULD be asserted by a test", in a paragraph arguing drift is
worse than no publication. The strongest obligation in 6.4 has the
weakest verification, and 13.1 shows four of five rows already test it.
F4. 13.1 marks ops-warden's unknown cell non-conformant and states
ops-mason's map as simply not published, which is a plainer violation of
the same obligation, unmarked in the same table.
Also answered their direct question: no, they did not over-read our
divergence report. Added that the ruling costs us nothing, since we are
not PEP-shaped, so our concurrence is weak evidence and ops-warden's
assent is worth more here.
FLEX-WP-0023-T05 and FLEX-WP-0024-T04 close. Notes T01-T03 landed from
Glas meanwhile with real receipts including an actually-expired token,
and that enforce authenticates the caller while leaving F1 untouched —
as their own note says.
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Updated by fix-consistency on 2026-09-06:
- update .custodian-brief.md for flex-auth
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Updated by fix-consistency on 2026-09-06:
- workplan status: ready → active
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secrets-engine probed the Service DNS name handed over in FLEX-WP-0021-T05
and found it resolves, from the workstation, to an unrelated public host.
Reproduced here: search ad.binect.de answers wildcard, so
flex-auth-secrets-engine.flex-auth.svc.cluster.local and
this-service-does-not-exist.flex-auth.svc.cluster.local both resolve to
80.158.43.29, while the trailing-dot FQDN correctly fails. A bare Service
name in a handover is not merely unreachable from there, it is a live
misdirection, and the handover was ours.
Had a deployment pointed at it, the CheckRequest body would have gone to
that host: subject, tenant, lane and resource ids, stage, field names,
purpose, plus the caller's bearer token.
Trailing-dot FQDN and "in-cluster only" now replace the bare name in the
example README, SCOPE.md, and the T05 note.
Their real question was how the response channel is authenticated, and
they declined to answer it locally because choosing a transport control
for our service is not a consumer's call. Right boundary, so the answer
is recorded here as FLEX-DEC-2026-010: it is not authenticated. Pins
serve plain HTTP, the envelope carries no signature, and a responder that
knows the package id and version can return a well-formed allow that
passes every check a consumer performs.
The part worth stating in the contract is that the digests do not help
and look like they do. Every input to request_digest,
policy_package_digest and registry_snapshot_digest is either sent by the
caller or published in this repo, so a forger reproduces all three
exactly. They establish integrity of the binding, never authenticity of
the source — and publishing more digests makes a forged envelope look
more authenticated, not less.
For secrets-engine specifically: fail-closed protects against a PDP that
is absent, not against one that lies. An unreachable PDP denies; a lying
PDP allows.
Third instance of one seam in three decisions. 008: a tenant carried
into the digest and never compared — visible, not enforced. 009: a caller
authenticated and never recorded — enforced, not visible. 010: a record
verifiable and unauthentic — checkable, but not evidence.
One nuance that changes the operator recommendation: kubectl port-forward
does authenticate the responder, transitively — no DNS name, one named
pod, API-server TLS. That is the exact reverse of the caller direction,
where it bypasses the NetworkPolicy. Independent properties pointing
opposite ways, so neither can be summarised as "the network protects it".
FLEX-WP-0024 carries signing; key custody routes through warden/OpenBao
rather than minting a key here.
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glas-harness asked for a supported owner access path with authenticated
caller binding and lifetime, ruling out Service DNS and a permanent
operator token. Both refusals are correct and the answer needs no new
mechanism: a TokenRequest token is short-lived, audience-scoped, and
bound by exact sub to the ServiceAccount the deployed pin already names.
Two findings came out of designing it.
First, for an operator caller the pin's NetworkPolicy is not a partial
control, it is silent: kubectl port-forward is proxied to the pod's own
loopback and no policy selector is consulted. So under warn the operator
path is unauthenticated and unfiltered, and the only reason it is not
reachable is that nobody has forwarded the port. warn was safe for
ops-warden because a workload pin still admitted one pod; here the warn
window protects nothing while it runs. enforce is the deliverable.
Second, the ServiceAccount named by the deployed binding does not exist.
Namespace secrets-engine holds only default, so enforce today would deny
every request rather than authenticate one.
Third, and this is the contract one: the decision record has no caller
field. provenance carries evaluator, mode, policy and registry digests
and decision time; binding carries the normalized request. So the four
negative tests can all pass and no artifact retains that they passed for
the request that mattered. Same seam as FLEX-DEC-2026-008 one layer up —
there a tenant was carried into the digest and never compared, visible
but not enforced; here a caller is authenticated and never recorded,
enforced but not visible.
provenance.caller, not binding.caller: the same request from a different
authenticated caller must decide identically, so the caller is not
replay identity and must not move request_digest. FLEX-DEC-2026-009.
Live receipts are not included. kubectl create token is credential
minting and was refused in this session, correctly; the commands are
exact and the expectations read out of internal/callerauth/auth.go, but
nothing is claimed as verified that was not run.
Also records the operator's tenant:platform decision
(5ed3fb35-eca9-413a-82b9-95171ba85bf6) and verifies that v2 already
enforces exactly it — exact string equality, no alias, no normalisation.
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secrets-engine.catalog-lane.lifecycle v1 contained no reference to
input.tenant — not in well_formed, not in the denial ladder, not in a
test. A rotate on lane:glas-primary under tenant:coulomb returned allow
against the deployed package (decision:066e629bbf0c0924).
Found while answering glas-harness's tenant-alignment request, which had
asked for wrong-tenant denial evidence. There was none to return.
Three covers failed the same way: every one of the 29 fixtures carried
tenant:platform, so the suite could not report on the field; T02's own
gate named "wrong-tenant deny" and was recorded done unmet; and the
engine hashes tenant into request_digest but never compares it. Four
other published packages carry the branch — this one was the outlier.
v2 adds wrong_tenant above wrong_system, three Rego tests and three
fixtures (28/28, 32/32). The absent-tenant test caught a second defect
in the first draft: a bare input.tenant != comparison is undefined on a
missing key, so the branch dropped and the ladder reported the wrong
rung. request_tenant := object.get(input, "tenant", "") fixes it.
v2 supersedes rather than amends v1 because the defect failed open: a
consumer pinned to _VERSION=v1 would keep receiving allows with no
signal the rule beneath the version string had changed. The earlier
dual-control correction stayed at v1 because it denied everything.
Replay envelopes regenerated at v2; both request_digest values are
byte-identical, so secrets-engine's digest join needs no re-pinning.
The sweep this prompted found tenant-engine unscoped on tenant as well —
deployed, and verified allowing tenant:coulomb. Not the same fix: its
request tenant names the target rather than the caller, so a constant
would break it. Recorded and carried by FLEX-WP-0022 rather than patched
unilaterally.
FLEX-WP-0021 closes at T05; the pin still serves v1 until a redeploy.
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