GPT-5.6 Final Signoff — Fable 5.1 R10-pre v2.2

Date: 2026-09-01 (America/Chicago) Input: files (20).zip / fable51-invariant-research-package-v2.2.zip Disposition: GO TO OPUS EXECUTION. NO FURTHER FABLE THEORY ROUND.

Independent verification

I independently unpacked the v2.2 package and ran:

python3 tools/drift_gate.py .

Result:

drift_gate: scanned 10 current-facing files; 41 crosswalk records
DRIFT GATE PASS

I independently ran the adversarial witness under:

PYTHONHASHSEED=0
PYTHONHASHSEED=1
PYTHONHASHSEED=42
PYTHONHASHSEED=123

Every run returned:

19 expectations, 0 failed
exit 0

Every stdout stream had SHA-256:

ad23cf4b178c2880da78abe22712c500674a80de5d3b1133b0b80453b6c4bcfc

Witness source SHA-256 remains:

439ed40b90fbf8d8c7c3c933a593f0b6420471df993ef28bb3359d620965868f

The cross-registry map parses with 41 records.

v2.1 findings closed

CLOSED — S3 provenance wording

The stale:

S3 ... + two mechanisms on copyable substrates

has been replaced by:

two independently necessary enforcement properties:
    currentness / exclusivity
    canonical-history continuity

mechanism count:
    substrate-dependent

This is the correct semantic/mechanism distinction.

CLOSED — crosswalk documentation

The frontier now documents the actual v2.1/v2.2 schema:

semantic_obligation
relation

rather than stale semantic_id.

CLOSED — S6 epistemic overstatement

The current surfaces now say double-locus birth is:

predicted reachable from supplied source/design evidence

and explicitly require live-repository verification before recording it as TESTED.

CLOSED — drift gate weakness identified in v2.1

The gate now contains positive assertions that require:

S3 currentness/exclusivity;
S3 canonical-history continuity;
permission for one compound trusted mechanism;
correct crosswalk field documentation;
PX13 before EMB-E1 before EXP-1;
ARM B explicitly named as the advancement/high-information test.

The package notes report that these positive assertions caught a real omission in the handoff during packaging, which was then fixed. This is evidence that the gate is doing useful work rather than merely existing.

Current semantic frontier

Still use this as a working execution map, not a proven irreducible basis:

S1  Admission singularity

S2  Authority non-amplification

S3  Continuity / anti-resurrection
    enforcement properties:
      currentness / exclusivity
      canonical-history continuity
    mechanism count is substrate-dependent

S4  Semantic observability
    adequacy + equivariance
    observation-as-write pending real API test

S5  External-effect honesty
    scoped to irreversible external effects

S6? World/Locus uniqueness
    candidate only
    first ask whether it is simply S1 at the World locus-birth domain

No further semantic rewrite is justified before execution.

Required next event

This package is an ingestion patch only. It contains no new execution receipt for:

R0.8.3 PX13 lab;
EXP-3;
EXP-4;
EXP-5;
EMB-E1;
distributed-currentness EXP-1;
S6?;
EXP-8.

Therefore the next return should come from Opus executing the accepted sequence, not from Fable producing v2.3 theory.

Step 1 — R0.8.3 PX13 lab

Run the already-built NC17–NC23 lab.

Acceptance target from the handoff:

receipts/R0.8.3-<timestamp>.json
24/24 gates
crash matrix unchanged

The result must be reported honestly even if it fails.

Step 2 — real-system reduction probes

Run:

EXP-3  observation-as-write
EXP-4  Locus/capability façade
EXP-5  authority merge

Do not repair the tests merely to preserve S1–S5. A falsification is a successful experiment.

Step 3 — EMB-E1

Execute only under its frozen explicit operator spend protocol.

Step 4 — distributed S3

Run both arms:

ARM A
    copied world
    no distributed currentness anchor
    boundary receipt

ARM B
    copied world
    explicit distributed currentness mechanism
    one competing advancement must be refused/quarantined

ARM B is the advancement test.

Step 5 — S6? + EXP-8

Verify double-locus birth against the live repository.

Then classify the result as either:

S1(domain = World locus-birth/currentness)

or evidence for a distinct obligation.

Pressure-test S3 on Micro-Locus profiles without importing desktop mechanisms by assumption.

What Opus should return

For the next GPT review, return a self-contained bundle containing:

1. exact git commit / tree identity before and after;
2. R0.8.3 PX13 receipt and raw lab logs;
3. EXP-3 / EXP-4 / EXP-5 code, outputs, and falsification receipts;
4. EMB-E1 receipt only if explicitly executed by the operator;
5. EXP-1 ARM A/B implementation and raw receipts if reached;
6. S6?/EXP-8 evidence if reached;
7. updated CROSS_REGISTRY_CLAIM_MAP.json only where evidence class/status changed;
8. updated INV_FRONTIER_R10_PRE.md with no promotion beyond evidence;
9. drift-gate output;
10. a concise CHANGELOG stating exactly which claims moved:
       PREDICTED -> TESTED
       IN_TREE -> LIVE_LOCAL
       SUPPORTED -> REFUTED
       candidate -> corollary
       etc.

Do not silently convert failure into a design patch before preserving the failing witness.

Final ruling

v2.2 is accepted as the canonical R10-pre execution handoff.

There is no remaining package-level blocker that justifies another Fable research iteration.

The project has reached the point where additional semantic confidence must come from the real system:

execute, preserve failures, update evidence classes, then adjudicate.