Session 0046 — 2026-04-22

Opening

Start time: 2026-04-22 21:11:53 BST
Repository age: 25 days (from 2026-03-28)
Sessions completed: 44 (SESSION-0001 through SESSION-0045; SESSION-0037 did not run)
LAUNCH-1: CLOSED — GO decision (SESSION-0021, 2026-04-15). Protective
disciplines active. Day-180 go/no-go checkpoint remains. No active
countdown — decision made before 2026-04-27 deadline.
Starting state (per SESSION-0045 close):
- Highest SPEC-N: SPEC-150
- Highest SCHEMA-N: SCHEMA-7
- Highest VAL-N: VAL-5
- Highest DOC-N: DOC-12
- Highest RELEASE-N: RELEASE-10
- Open SPEC: 3 — SPEC-145 (12-code exit-code split), SPEC-146 (Appendix A
  full audit), SPEC-150 (C2PA signature validation / Depth 2)
- Closed SPEC: 147
- Open non-SPEC: 1 SCHEMA (SCHEMA-2 v1.1) + 1 VAL (VAL-4 post-RELEASE-8)
  - 4 DOC (DOC-3, 9, 11, 12) + 5 RELEASE (3, 4, 8, 9, 10) = 11
- Total open: 14; total closed: 167
- Deferred (uncounted): VAL-2, DOC-2 = 2
- Completion: 167 / 181 ≈ 92.3%
- v1.0 SPEC blockers: 3 items (SPEC-145, SPEC-146, SPEC-150). RELEASE-8
  pre-Rust review gate is the remaining ratification gate after those
  three land.
Cleanliness check: PASSED. Git check — 0 commits between last
state-file update (907ec1a) and HEAD; state file is HEAD and is
current. Session-file check — SESSION-0045 closing section fully
populated (end time, duration, ending state, 40 commits listed, next
work unit, notes). Working tree clean.
Mid-flow notes from SESSION-0045 close:
- Next work unit (carry-forward): three remaining v1.0
  ratification-blockers in prescribed order —
  1. SPEC-145 first (12-code exit-code split). Mechanical sweep
    across every section routing to 0x07 WARN_CUSTODY_GAP; twelve
    new codes allocated from 0x2D upward (SPEC-115 took 0x2B,
    SPEC-142 took 0x2C). No test-vector regeneration.
  2. SPEC-150 second (C2PA signature validation, Depth 2). New
    §6.7.1.3 normative section; two new exit codes allocated after
    SPEC-145's block; §12 "fully verified" extension; §4 references
    add C2PA + JUMBF pins. No schema change, no test vectors.
  3. SPEC-146 third (Appendix A full audit). Substantial prose;
    Opus 1M recommended for a longer focused session. Coordinate
    with SPEC-150 on the Content Credentials verified-logo display
    template so it is defined once.
- Commit discipline: PROVR_RULES rev 25 active — single-focus
  subjects, narrative bodies, enumeration only for list-shaped
  content. Held cleanly throughout SESSION-0045.
- Framing guard: PROVR_RULES rev 24 active — ratification-quality
  up front; no MVP-iterate-later slips. Held cleanly in SESSION-0045.
- Signing-vector generator: tools/gen_signing_vectors.py is at
  the post-SPEC-143 shape and covers every signing input currently
  defined. Any future SPEC that touches a signing input must extend
  the generator in the same commit as the spec change.
- Session-file tidy opportunity: CURRENT_SESSION_STATE.md was
  incrementally tidied via commits b04843c, 987f632, 5bf0bbd,
  907ec1a after the late-session SPEC-147 close + SPEC-150 filing.
  State file currently reflects three-blocker framing.
Fixes / follow-ups flagged in CURRENT_SESSION_STATE.md:
- SPEC-150 filing note: once SPEC-145 lands, its new exit-code block
  is fixed, and SPEC-150's two codes can be allocated after it.
- Design-doc Status-header audit across docs/design/ files
  (rev-20 coupling rule) still outstanding from SESSION-0044
  carry-forward; ledger_architecture.md updated, others not
  re-checked.
- DOC-3, DOC-9 (substantially expanded scope), DOC-11, DOC-12
  remain open; DOC-9 is the other substantial remaining v1.0
  blocker (corpus regeneration, ~65–70 fixtures at v1.0, parallel
  track that does not gate RELEASE-8).
- SCHEMA-2 (v1.1), VAL-4 (post-RELEASE-8), five RELEASE gates
  still open.
Recent environment changes:
- Rev 24 + rev 25 disciplines both live Notes-side since
  SESSION-0044; held through SESSION-0045.
- ~/hijackr/Notes/provr/AUDIT_METHODOLOGY.md canonical for
  pre-ratification audit procedure.
- SPEC-147 (Part I / Part II structural decision) closed at
  SESSION-0045 tail; SPEC-150 (C2PA Depth 2) filed at same tail as
  new ratification-blocker.

Work

Strategic-review session followed by a five-SPEC autonomous run.

Opening phase — at the user's prompt on whether SPEC-150 was "just
go implement" level, surfaced four real judgement calls (SPEC-145
sequencing, C2PA Recommendation version pin, "fully verified"
semantics when C2PA trust unresolved, display-template placement).
User returned locked decisions on all four plus additions:

SPEC-145 lands first so its 12-code block is allocated before
SPEC-150's two codes.
Pin C2PA 2.3 (December 2025) — not 1.x. 2.x is breaking from
1.x (W3C VC removed, X.509-only signing), with graceful-degradation
for 1.x manifests encountered in the wild.
Three-state verification model instead of two-state —
fully_verified / verified_trust_pending / failure. Offline
X.509-trust-unresolved is a distinct positive state, not a downgrade.
Content Credentials display: text-only marker drafted inline in
SPEC-150; CR pin logo deferred to v1.1 pending CAI licensing.
SPEC-151 filed (optional X.509 signer identity) as a v1.0
ratification-blocker — enterprise PKI compatibility without
abandoning DID-native default. Heaviest remaining v1.0 piece:
schema change + §6.7.0 canonical-signing-input extension +
V1–V8 test-vector regen + bindings regen + new exit code.
SPEC-152 filed as v1.1/v1.2 consideration — Sigstore/Rekor-
style transparency-log attestation. Captured with proper framing,
not a v1.0 blocker.
EUDI posture memory saved — provr stays DID-native because EU
Digital Identity Wallet rollout (2026) is DID-based; zero-bridging
alignment when it matters. SPEC-151 adds X.509 as optional
enterprise-compat path; plurality is the architecture.
Commissioned a full C2PA 2.3 spec review before the autonomous
run — 12 findings surfaced in AUDIT-2026-04-22-C2PA-2_3.md. User
approved in bulk:
- Four findings (timestamp discharges cert expiry, C2PA Trust
  List + EKU check, ingredient-recursion carve-out, status-code
  pass-through) folded into SPEC-150 before landing.
- digitalSourceType extraction (Finding 8) folded into SPEC-150.
- Hard-binding coexistence non-normative note (Finding 3) folded
  into SPEC-150.
- SPEC-154 filed for ingredient-relationship summary display.
- SPEC-155 filed for redaction-event surfacing (forensic signal).
- Content Credentials marker text-only for v1.0; CR pin deferred.
- Manifest-Store preservation + device attestation + hard-binding
  coexistence recorded as "no action needed — already covered"
  (positive interop signal).
- Actions vocabulary mapping + recursive ingredient validation
  confirmed as SCHEMA-2 v1.1+ track.

Execution phase — five SPEC closures on main:

SPEC-145 closed (commit 633d8b4). Eleven new exit codes at
0x2D WARN_CUMULATIVE_GAP through 0x37 WARN_REGISTRY_POLICY
replacing the semantically-overloaded 0x07 WARN_CUSTODY_GAP at
twelve call-sites across §6.2.2, §6.13, §6.16.3 (×2), §6.16.4
(×5), §6.27.3 (×3), §6.27.4, §6.29.7, §6.30.7. 0x07 narrows at
§11 to the volume-change-no-Transfer condition only. Exit Code
Classes range extended to 0x07–0x37. One edge-case usage in
§14 failed-folder accumulation dropped its specific-code claim
and now surfaces as a MAY informational operator notice without
a mandated code.
SPEC-150 closed (commit bb53949). C2PA 2.3 Depth-2 signature
validation at forensic and attested. New §6.7.1.3 with parse
requirement, signature validation path (COSE_Sign1 claim + X.509
chain + timestamp counter-signature), ingredient-recursion
carve-out to SCHEMA-2, timestamp discharges signer-cert expiry,
Trust List consultation + c2pa-kp-claimSigning EKU check with
EKU-missing as informational sub-state, three-state result model,
failure modes, C2PA-native status-code pass-through in verifier
notes, C2PA 1.x graceful-degradation rule, Adobe c2pa-rs
implementer pointer. §6.7.1 gains a non-normative hard-binding
coexistence note distinguishing dataset_merkle_root from
c2pa.hash.*. §6.7.5 extended to five extracted fields. New
§6.7.5.7 digitalSourceType extraction at §6.7.5.2 "claimed"
labelling. §6.7.5.6 "Informational status" paragraph now points
at §6.7.1.3 for verify-time validation. §4 References pin C2PA
2.3 (December 2025) and ISO/IEC 19566-5:2019 (JUMBF). Two new
exit codes 0x38 WARN_C2PA_SIGNATURE_INVALID and 0x39 WARN_C2PA_TRUST_UNRESOLVED at §11. Class range extended to
0x07–0x39. §12 gains three-state verification-result
paragraph as authoritative "fully verified" definition.
Appendix A §A.2 Section 6 gains normative text-only Content
Credentials marker sub-row (Content Credentials verified /
Content Credentials verified — trust pending / absent; CR pin
deferred to v1.1).
SPEC-155 closed (commit db103c0). C2PA redaction-event
surfacing at forensic and attested. New §6.7.1.4 specifying
cross-generation detection rule (compares active manifest of
generation N+1 against generation N; fires when c2pa.actions
gains a c2pa.redacted entry or redacted_assertions acquires
new URIs) and informational note contents. No WARN code —
redaction is a declared operational event, not an integrity
failure. Multi-generation inheritance rule, active-manifest-
selection dependency note, parser-failure handling. Appendix A
§A.2 Section 6 gains normative Content Credentials: redaction event … sub-row. Reuses SPEC-150's JUMBF parser.
SPEC-154 closed (commit 8b2587b). Ingredient-relationship
summary display at forensic and attested. New §6.7.5.8 extracting
c2pa.ingredient.v3 (and 1.x variants under graceful-degradation)
count, relationship tally (parentOf / componentOf / inputTo
/ other), and titles (truncated to 64 UTF-8 code points).
Active-manifest scope only; no recursion into parent or component
manifests (deferred to SCHEMA-2 consistent with the SPEC-150
carve-out). Parser failure graceful per §6.7.5.4. Non-validation
labelling per §6.7.5.2. Cross-reference note flagging
SourceReference and C2PA ingredients as parallel tracks.
Appendix A §A.2 Section 6 gains normative Ingredients: N (P parent, C component, I input) — Title1, … sub-row. Absent
when no ingredient assertion present; implementations SHALL NOT
render Ingredients: 0 — (none).
SPEC-146 closed (commit c69bf7d). Appendix A full audit.
Nine new normative display-template sections §A.7–§A.15 covering
every SHALL display / SHALL surface / SHALL be reported in provr show assertion in the spec body previously missing an
Appendix A template:
- §A.7 ReadVerification Display
- §A.8 Disputes — Repudiation and Resolution
- §A.9 Key Rotation — Superseding Signatures
- §A.10 Policy Overrides
- §A.11 Registry Acknowledgement and Policy Violations
- §A.12 Cryptographic-Only Verifier Informational Message
  ("Registry-layer policy: NOT CHECKED" as an exact-string
  output contract, prohibiting variants)
- §A.13 DriveState Verification Details (verify-time comparison
  extending §A.2 Section 7)
- §A.14 Cloud Transfer Metadata
- §A.15 Display Section Ordering (normative 21-slot ordering
  across all of Appendix A; absent sections omitted, not
  rendered empty).
Coordinated with SPEC-150 Content Credentials marker (folded
inline at SPEC-150 landing), SPEC-155 redaction-event sub-row,
SPEC-154 ingredient-summary sub-row. SPEC-151 dual-identity-path
display rows (DID vs X.509) deferred as a SPEC-146 follow-up
amendment at SPEC-151 landing time because the X.509 fields
don't exist in the schema yet.

State-file narrative tidy landed as a separate c0b920b commit,
consistent with the SESSION-0045 late-session state-file tidy
pattern. Priority Ordering / Session continuity pointers / Natural
Next Work Unit sections rewritten to reflect SPEC-151 as the sole
remaining v1.0 ratification-blocker.

SPEC-151 deliberately deferred to SESSION-0047 as a dedicated
focused session. Rationale: schema change across six tables +
§6.7.0 canonical-signing-input extension (identity-tag discriminator
byte) + V1–V8 signing-vector regeneration + FlatBuffers bindings
regen + cross-section prose is the heaviest remaining v1.0 piece
(~4–6 hours). Wrong preimage layout cascades through every DOC-9
fixture. At SESSION-0046 option-2 decision point, user agreed
option 2 (finish SPEC-155 / SPEC-154 / SPEC-146 tonight; give
SPEC-151 its own fresh focused session) needed least input and had
best risk/reward.

Closing

End time: 2026-04-22 23:24:08 BST
Duration: approximately 2h 12m (start 21:11:53 BST; end 23:24:08 BST;
computation: 23:24:08 − 21:11:53 = 2h 12m 15s)
Ending state:
- Highest SPEC-N: SPEC-155 (unchanged; SPEC-153 was reserved for
  Finding 10 / Finding 12 standalone filing but ended up folded
  into SPEC-150, leaving SPEC-153 unused)
- Highest SCHEMA-N: SCHEMA-7 (unchanged)
- Highest VAL-N: VAL-5 (unchanged)
- Highest DOC-N: DOC-12 (unchanged)
- Highest RELEASE-N: RELEASE-10 (unchanged)
- Open SPEC: 2 — SPEC-151 (sole v1.0 ratification-blocker;
  deferred to SESSION-0047 as planned) and SPEC-152 (v1.1 / v1.2
  consideration, not a v1.0 blocker)
- Closed SPEC: 152 (147 at session start + 5 this session —
  SPEC-145, SPEC-150, SPEC-155, SPEC-154, SPEC-146)
- Open non-SPEC: 1 SCHEMA (SCHEMA-2 v1.1) + 1 VAL (VAL-4
  post-RELEASE-8) + 4 DOC (DOC-3, 9, 11, 12) + 5 RELEASE
  (3, 4, 8, 9, 10) = 11
- Total open: 13; total closed: 152 + 6 SCHEMA + 3 VAL + 5 DOC
  - 5 RELEASE + 1 LAUNCH = 172
- Deferred (uncounted): VAL-2, DOC-2 = 2
- Completion: 172 / 185 ≈ 93.0%
- v1.0 SPEC blockers: 1 (SPEC-151). After SPEC-151 lands,
  RELEASE-8 pre-Rust review gate unblocks; DOC-9 corpus regen is
  the other substantial v1.0 track but does not gate RELEASE-8.
Commits: 8 commits on main, none pushed to origin.
1. a58c8de — opening: SPEC-151 + SPEC-152 filed
2. 2766298 — SPEC-150 scope expanded by C2PA 2.3 audit;
  SPEC-154 + SPEC-155 filed
3. 633d8b4 — SPEC-145 closed (12-code exit-code split)
4. bb53949 — SPEC-150 closed (C2PA 2.3 Depth-2 validation
  - six audit fold-ins)
5. db103c0 — SPEC-155 closed (redaction-event surfacing)
6. 8b2587b — SPEC-154 closed (ingredient-summary display)
7. c69bf7d — SPEC-146 closed (Appendix A audit — nine new
  §A.7–§A.15 sections)
8. c0b920b — state-file tidy after closures

Next work unit (SESSION-0047)

SPEC-151 — optional X.509 signer identity. Sole remaining v1.0
ratification-blocker. Full scope per TRACKING.md entry:

Schema additions on six tables (ProvenanceData, ApprovedSigner,
ReadVerification, RepudiationNote, ResolutionNote,
PolicyOverride): optional signer_x509_subject + signer_x509_cert_chain
(and equivalents) alongside existing DID fields; exactly-one-identity
rule per signed structure.
§6.7.0 canonical-signing-input extension with an identity-tag
discriminator byte. Preimage shape changes across every signing
construction; V1–V8 test vectors in conformance/reference/signing_vectors.json
require regeneration. Extend tools/gen_signing_vectors.py in the
same commit as the spec change.
Reuses SPEC-150's §6.7.1.3 X.509 validation primitive for provr-
side X.509 chains — the validation algorithm is defined; SPEC-151
extends it to the provr signing path.
New exit code 0x3A WARN_X509_CHAIN_UNRESOLVED. Exit Code Classes
range extends from 0x07–0x39 to 0x07–0x3A.
Prose updates across §6.13 (identity), §6.30 (ApprovedSignerList
accepts both identity paths), §6.16.5 (attested conformance
identity-agnostic), §12 (Forensic Conformance acceptable identity
paths explicitly listed).
Optional Appendix A follow-up: dual-identity-path display rows
in §A.10 / §A.11 / §A.9 that SPEC-146 deferred because the X.509
fields don't exist in the schema until SPEC-151 lands.
Size estimate: 4–6 hours. Opus 1M recommended for cross-section
consistency. Reserve a dedicated focused session; don't try to
combine with other SPEC work — the signing-input change is the
sort of thing that needs to be right-first-time.

Notes for SESSION-0047

tools/gen_signing_vectors.py was untouched at SESSION-0046. It
remains at the SESSION-0045 post-SPEC-143 shape. SPEC-151 is the
next preimage-changing SPEC. Extend the generator in the same
commit as the spec change per established discipline.
C2PA 2.3 interop review findings that needed no action are
recorded in AUDIT-2026-04-22-C2PA-2_3.md. Three pieces of positive
interop signal to note — provr's existing design turns out correct
against C2PA 2.3 on Manifest-Store preservation, device attestation
(provr's §6.7.4 DeviceCertificate is a parallel path to C2PA's
X.509 device certs), and hard-binding coexistence. The audit
report is worth keeping for future ecosystem-doc work.
EUDI posture memory entry (project_eudi_alignment.md) captures
the DID-native rationale — EU Digital Identity Wallet rollout in
2026 is DID-based, so provr stays DID-native as default. SPEC-151
adds X.509 as an optional enterprise-compat path; plurality is
the architecture.
Commit discipline under PROVR_RULES rev 25 held throughout —
single-focus subjects, narrative bodies, enumeration only for
list-shaped content. The approach used on SPEC-150 of folding
audit findings into a single coherent SPEC rather than filing
follow-up SPECs is worth repeating when appropriate.
Ratification-quality framing under PROVR_RULES rev 24 held
throughout — no MVP-iterate-later slips. The mid-session
check-in at "what needs least input from me?" before diving into
SPEC-151 was the right cautious call; option 2 (prose-only SPECs
tonight, schema-change SPEC in its own session) was the correct
risk-managed path.
After SPEC-151 closes, RELEASE-8 (pre-Rust implementation and
interoperability review) becomes the next session's work — run
against a truly ratification-ready spec. DOC-9 corpus regen is
the other substantial remaining v1.0 track but runs in parallel
and does not gate RELEASE-8.