Record OpenAI zeta-fold replay, fresh checks and stdout custody incident

reviews/zeta_fold_slice_c_openai_20261026/ENGINEERING_REVIEW.md

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+# Separate local engineering review
+
+Actual reviewer: OpenAI / Codex subagent `/root/zeta_evidence_review`, a fresh
+source-exposed review invocation, same provider/family as this evidence author.
+Organizational-independence credit 0. It did not execute the numerical replay,
+write this evidence, repeat C8/R1, or perform qualifying scientific review.
+This is the reviewer's report, retained by the foreground author. No human
+review or independent organizational control is claimed.
+
+**Verdict: PASS for the scoped harness and candid evidence record, pending
+final manifest identity verification.** No critical defect or remaining
+implementation blocker found.
+
+Reviewed execution source `0a7e5145`, frozen review `8f1d846d`, evidence base
+`b7e012c2`. Reviewed core SHA-256 prefixes: `build_evidence.py` `aa064dc6`,
+`run_replay.py` `3193e8e1`, `fresh_check.py` `c4e8b558`, README `06296cc6`.
+The final manifest binds their complete identities.
+
+## Findings and dispositions
+
+- **Important, ZF-OAI-CUSTODY-01 remains unexplained.** Retained 1511B stdout
+  is a prefix of the1816B output recorded by the capture-time hash. The separate
+  recovery matches that hash exactly. Strict validation rejects the damaged
+  capture; explicit recovery validates both identities, reports one incident,
+  rejects changed/unused recovery entries and preserves the damaged file.
+  This supports recovered content, not an intact-original-capture claim or an
+  explanation. Handling and reporting are adequate.
+- **Important validator gap, resolved.** Initial validation accepted wrong
+  interpreter/cwd and did not enforce recorded version pins. Current validation
+  checks Python/NumPy/mpmath, backend/thread pins, each interpreter/cwd, the
+ 59-command multiset, job exits and both parent-lane exits. Targeted negative
+  controls refuse these changes.
+- **Minor historical provenance limit, retained accurately.** The frozen driver
+  records stderr size, not capture-time SHA-256. Final package hashes bind retained
+  contents but cannot establish a capture-time digest. README/SETUP say so.
+- **Minor replay/metadata limits, disclosed.** Executed wrapper records pins
+  rather than enforcing them and does not inventory ignored raw files. Packaging
+  enforces recorded pins; actual refit lines and generator receipts substantiate
+  this run's regeneration. Fresh overall start/wall metadata was not captured
+  and remains unknown. No rerun manufactures missing metadata.
+
+## Independent checks actually performed
+
+- Frozen driver/comparator equal #451 byte-for-byte.
+- Actual59-command multiset, all job exits and both lane exits validate.
+- All66 reproduced hashes/classes recompute:49/15/2 against original,
+  49/17/0 against frozen same-provider rerun. Every nonidentical comparison has
+  its complete diff.
+- All51 source-table entries and9 raw hashes match execution files.
+- Fresh CSV contains384 finite points,128 per planned window; maximum errors
+  recompute exactly. All six grid hashes/counts verify:66/51/37 at both steps.
+- Four current bookkeeping test methods independently pass. Retained normal
+  and optimized logs agree.
+- Executed wrapper/fresh script identities remain unchanged. Recovery involved
+  no numerical re-execution.
+
+The README preserves both residual-trail differences, reports c3435's unmet
+step-stop criterion despite rc0, and avoids all-C or acceptance claims.
+
+## Declined scopes
+
+Mathematical correctness; reference certification; uniform error bounds;
+zero completeness/RH; convergence or quadrature certification;
+persistence/exponent hypotheses; historical trail causes; qualifying scientific
+review; prior C8/R1 work; integration readiness; hosted CI. The final manifest
+had not been generated when this verdict was returned. Any later identity-only
+supplement is recorded separately on the contribution PR without rewriting this
+review's chronology.
+
+credit 0 · sci NONE · eng ≠ discharge · no flags · OBL OPEN

reviews/zeta_fold_slice_c_openai_20261026/HANDOFF.md

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+# Evidence handoff
+
+This new record belongs to canonical pickup
+[ZF-OPENAI-EXECUTION-20261026](https://github.com/d6g8k5htny-coder/main/pull/458#issuecomment-6409941584).
+The source stage delivers the independently executed OpenAI numerical evidence
+under this directory only. Its author-stage release and PR head are recorded
+in the task-local GitHub completion receipt after publication; this file does
+not invent a future review, receiver, integration allocation or merge result.
+
+Remaining separately claimable work:
+
+1. A nonauthor **different-family numerical-record/scientific read** of this exact
+   new evidence, including its limitations and recovery by matching hash. The
+   existing same-provider local engineering review qualifies only its stated
+   bookkeeping scope. No rerun, review or acceptance by another family is implied.
+2. If the project elects to integrate this review record, a separately claimed
+   integrator qualifies current head/base/composition, actual Ready review,
+   hosted required checks and protections. This source stage does not authorize
+   taking over #458's venue branch, #480/#482's packet/README scopes, #484's hold,
+   any settings or workflow changes, or a merge under the old venue approval.
+3. Any investigation of **ZF-OAI-CUSTODY-01** preserves the inconsistent capture,
+   original ledger, failed strict validator and exact-hash recovery. Its cause
+   is UNKNOWN. The recovered bytes establish content identity, not an explanation
+   or a claim that the damaged capture was unmodified.
+
+All59 command execution and9 raw-hash matches do not automatically close all
+R2/slice-C requirements. This package changes no proof, theorem status, flag,
+scientific acceptance, register, index or packet statement. It is additional
+source-exposed numerical evidence with organizational-independence credit0.
+
+Required onboarding links:
+[owner mandate](https://github.com/d6g8k5htny-coder/main/blob/main/governance/OWNER_MANDATE_20261015.md),
+[standing delegation](https://github.com/d6g8k5htny-coder/main/blob/main/governance/OP-AUTONOMY-20260923-v2.1.md),
+[review-family decision](https://github.com/d6g8k5htny-coder/main/blob/main/governance/OWNER_DECISION_20261025_REVIEW_FAMILIES.md)
+and [current workflow](https://github.com/d6g8k5htny-coder/main/blob/main/governance/OP-WORKFLOW-20260930.md).
+
+credit 0 · sci NONE · eng ≠ discharge · no flags · OBL OPEN