Collect v0.8 assent findings; correct GH-DEC-2026-008 for implementability

Four findings returned so far, all from access-engine and
approval-engine. F1 is the serious one: GH-DEC-2026-008 as written
mandated a comparison that could never pass, because a claim travelling
inside a hashed request cannot name the digest of the request containing
it. A fail-closed consumer obeying it would have denied destroy
permanently — the ruling and its own fail-closed requirement compounded
rather than cancelled.

Ruling and its four obligations stand; the comparison target is corrected
to the PDP's published exclusion-scoped digest, verified in flex-auth's
schema and canonical.go before amending. A consumer must not guess the
exclusion rule, and until a PDP publishes one the path is fail-closed
rather than complete.

F2 adds the general property access-engine flagged as a near miss it was
not asking to have written: an evidence-bearing input may be excluded
from a correspondence digest but never from the replay identity.

The round record notes what this says about the process. GH-DEC-2026-008
was correct in substance, argued from doctrine, and verified against
another repository's schema before issue — and none of that caught a
defect three repositories found within hours of building on it.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01WtJBr77gMFLrN93iEevqQJ

Assistant: claude-code
Assistant-Model: opus
Assistant-Process: 425128@bnt-lap001
Assistant-Session: f5944d8b-dac4-4e1a-87eb-8b3d8f314a63

docs/conformance/2026-09-06-v08-assent-round.md

@@ -0,0 +1,112 @@
+# v0.8 assent round — findings and dispositions
+
+**Repository:** gate-house
+**Project family:** NetKingdom security layer
+**Status:** open — round in progress
+**Version:** 0.1
+**Date:** 2026-09-06
+**Subject:** `net-kingdom/canon/standards/security-layer-model_v0.8.md` (proposed)
+**Workplan:** `GH-WP-0003-T06`
+
+*Derived artifact: this record states the round's status as of the date above, not
+current state. Authoritative bodies are the decision records and the cut itself.*
+
+## Circulated
+
+`ops-warden`, `approval-engine`, `access-engine`, `kings-guard`, `audit-core`, and
+`net-kingdom` (publisher). Each was told what the version costs them and what to
+attack, rather than sent a summary to nod at.
+
+## Findings returned
+
+### F1 — `GH-DEC-2026-008` was unimplementable as written · **adopted, corrected**
+
+Reported by `access-engine`, independently by `approval-engine`, originally found by
+`secrets-engine` re-verifying a replay fixture — within hours of the ruling and before
+the assent round had properly opened.
+
+The ruling required `claim.binding.pdp_digest` to equal the decision's
+`NewDecisionBinding.request_digest`. `access-engine` hashes context into that digest
+and the dual-control pattern carries the claim in `context.approval`, so embedding the
+claim changes the digest of the request carrying it. A hash cycle: a claim cannot name
+the digest of a document containing that claim.
+
+**A fail-closed consumer obeying the rule would have denied `destroy` permanently.**
+The ruling's own fail-closed requirement is what would have made it harmful rather
+than merely wrong — the rule and the failure mode compounded instead of cancelling.
+
+**Disposition.** Ruling stands; its four obligations stand; obligation 1's comparison
+target is corrected to the PDP's published exclusion-scoped digest
+(`binding.approval_binding_digest`, `FLEX-DEC-2026-007`). v0.8 §9.7.3 rewritten. A
+consumer MUST NOT guess the exclusion rule, and until a PDP publishes one the path is
+fail-closed rather than complete — a gap in a dependency, not in the ruling.
+
+Verified independently against `flex-auth/schemas/decision_envelope.schema.json` and
+`pkg/api/canonical.go` before amending.
+
+### F2 — replay identity versus correspondence digest · **adopted, added**
+
+Flagged by `access-engine` explicitly as a near miss it was *not* asking to have
+written down. The obvious fix to F1 is to drop `context.approval` from the request
+digest entirely, and that is unsafe: two requests differing only in which approval was
+presented decide differently, so collapsing them lets an allow obtained with a valid
+claim be replayed against a request carrying none.
+
+**An evidence-bearing input may be excluded from a correspondence digest but never
+from the replay identity.** Added to v0.8 §6.4 obligation 5. A property discovered by
+nearly getting it wrong is worth more written down than remembered, and the shape
+recurs wherever evidence travels inside a hashed request.
+
+### F3 — `GH-DEC-2026-009` adopted, with a reason we had not stated
+
+`access-engine` records that the `unknown` ruling is right for the adversarial reason
+— `unknown` is the cheapest state to induce, so failing open on it makes being
+unclassifiable a credential-free escalation — and notes it had reported the divergence
+without reaching that reading. No change; recorded because the reasoning, not the
+conclusion, is what a later reader needs.
+
+It also endorses sending `ops-warden`'s non-conformant cell to the round rather than
+imposing it.
+
+### F4 — A7 accepted by its own worked example
+
+`access-engine` accepts its dual-control instance as the one carrying the argument,
+and notes the §11 marking obligation would have caught the source: the stale G3 row in
+its own 2026-08-29 review, handed on as current. No change.
+
+## Implementation ahead of acceptance
+
+Both engines implemented against the ruling before the round closed.
+
+- `access-engine` — `FLEX-DEC-2026-007`, `dd3ce4c`: publishes
+  `binding.approval_binding_digest`, and asserts by test that the two digests
+  **disagree** on a claim-bearing request, so a later refactor cannot collapse them.
+- `approval-engine` — `7e75677`, 102 tests: schema v3 declares `pdp_path`; `create()`
+  refuses `pdp_path: true` without a `pdp_digest`, so an approval that would be
+  unusable on the path fails **at issue** rather than at the protected side effect.
+  Intent is declared and never inferred — a digest that happens to be present is not a
+  declaration, legacy rows migrate to `false` rather than being back-filled, and a
+  successor inherits its predecessor's declaration. Back-filling would have
+  manufactured a statement no requester made, which is `GH-DEC-2026-008`'s own
+  objection to translation in another form.
+
+## Still outstanding
+
+`ops-warden` (the `unknown` cell it acquires), `kings-guard` (the criteria-grounding
+clause, and whether §12's step-four paragraph is now stale), `audit-core` (whether
+§11's emission-guarantee wording lets a source imply completeness), `net-kingdom`
+(whether §17 says what it would say in its own voice, and whether §11 tracks its
+published profile).
+
+## What the round has shown so far
+
+The first finding against v0.8 was a rule that was **right and unimplementable**, and
+it was found by the repository that would have been broken by it, then reported by two
+others under no obligation to look. That combination is only survivable because the
+implementers read the ruling against their own fixtures instead of accepting it — the
+behaviour §12 describes, arriving without being asked for.
+
+It is also an argument for the round itself. `GH-DEC-2026-008` was correct in
+substance, argued from doctrine, and verified against another repository's schema
+before it was issued. None of that caught a defect that three repositories found in
+hours of trying to build on it.

docs/contracts/approval-consumption.md

@@ -5,7 +5,7 @@
 **PDP:** access-engine (currently flex-auth)
 **Status:** normative for GH-WP-0002-T06; recorded as `GH-DEC-2026-003`,
 amended by `GH-DEC-2026-005` (step-1 artifact and split validation) and
-`GH-DEC-2026-008` (the PDP digest is the binding correspondence)
+`GH-DEC-2026-008` (the binding correspondence, amended for implementability)
 **Date:** 2026-09-06
 **Statute:** `net-kingdom/canon/standards/security-layer-model_v0.7.md` §9.4, §9.7.3–4, §16
 **Blocks:** `APPROVAL-WP-0001-T05`, `FLEX-WP-0017-T05`
@@ -61,10 +61,26 @@ claim.
 holds no runtime approval authority; the issuer to check is the engine that
 served the claim.
 
-**The correspondence is the PDP digest.** Amended by `GH-DEC-2026-008`. A consumer
-on this path MUST verify that `claim.binding.pdp_digest` equals the decision's
-`NewDecisionBinding.request_digest`, and MUST NOT use a claim that carries no
-`pdp_digest`. Recomputing `approval-engine`'s native `binding.digest` from a
+**The correspondence is a digest, and it is the PDP's to define.** Amended by
+`GH-DEC-2026-008`. A consumer on this path MUST verify that the approval's recorded
+PDP digest equals the digest the PDP publishes **for the request with the approval
+evidence excluded** — `binding.approval_binding_digest` in `access-engine` — and MUST
+NOT use a claim carrying no such digest.
+
+The comparison is **not** against the full request digest. Where the claim travels
+inside the hashed request, embedding it changes that request's digest, so a digest
+recorded at issue can never equal the final one: a hash cycle whose resolution is
+forced, not chosen. The first form of this rule mandated a check that could never
+pass, and a fail-closed consumer obeying it would have denied the action permanently.
+
+A consumer MUST NOT guess the exclusion rule. A digest computed under an assumed rule
+produces a confident wrong answer, and comparing two digests derived under different
+rules fails open toward accepting a claim bound to a different request. Until a PDP
+publishes its exclusion rule, this path is correctly fail-closed rather than complete.
+
+An **evidence-bearing input may be excluded from a correspondence digest but never
+from the replay identity** — two requests differing only in which approval was
+presented decide differently, so one digest cannot serve both purposes. Recomputing `approval-engine`'s native `binding.digest` from a
 `CheckRequest` is **not** a permitted fallback here: it requires translating between
 two engines' vocabularies, no mapping is published, and a wrong translation fails
 open by silently accepting a claim approved for something else. The native limb