[d6g8k5htny-coder]

Repairs the two unassigned engineering findings recorded by the Downstream Closure Loop audit on Math-#322 comment 6522289020.

Changes

• reviews/contact_kernel_tail_20260925/run_validation.py: replace the exit-code/any-AssertionError mutant predicate with a per-mutant exact unittest failure-ID contract. The runner requires exactly 24 tests, no skips/errors, exact failure count and exact expected test-ID set in normal and optimized modes. It retains expected and observed failure IDs in REPORT.json.
• reviews/contact_kernel_tail_20260925/SOURCE_FILES.json: update only the runner's byte-count/SHA-256 identity.
• .github/workflows/contact-small-gap.yml: add reviews/pr16_fixed_transverse_nonauthor_20260925/** to the pull-request path filter because the job consumes both reviewer files from the current checkout. Existing paths, action pins, permissions, checkout refs, execution environment and artifact retention are unchanged.

The seven mutant-to-test mappings are explicit in the runner. They were derived by running the exact current contact_tools.py and test_contact_tools.py source in a disposable fixture. A mutant is no longer considered killed merely because any unrelated assertion fails.

Exact candidate

• Base: 19a55750451b8016b50d1d20be6a18c021807ecb.
• Head: f0256ef1bf3b9b24dd03915e58946779b773604e.
• Branch: dcl/contact-small-gap-mutant-identity-20261030.
• Three sequential commits: runner repair, manifest pin, workflow trigger coverage.

Validation performed

Local disposable fixture on Python 3.13.5:

• Baseline: 24/24 tests passed.
• Seven actual mutation anchors: all seven matched their exact expected failing-test sets in normal and optimized modes (14/14 mutation executions).
• Negative control: three unrelated assertion failures with the same count as an expected mutant were rejected because their test IDs did not match.

This is local Python 3.13.5 evidence only. It is not the workflow's pinned Python 3.11.16 run, hosted CI, a formal review, or a mathematical result. The exact-head hosted workflow and required math-downstream-gates remain pending. This PR intentionally remains Draft.

Scope exclusions

No changes to contact_tools.py, test_contact_tools.py, RESULTS.json, proof/reviewer/candidate files, theorem premises, status/index/proof registers or graph. No mathematical/proof/analytic acceptance, theorem promotion, scientific-status mutation, workflow dispatch, branch-protection/settings/permissions change, security approval, Ready transition, integration or merge. The workflow delta is limited to adding the consumed reviewer-input directory to the PR path filter.

Scientific effect: NONE. Organizational-independence credit: 0.

Authority: owner mandate · standing delegation · Main AGENTS · Math- AGENTS · OP-WORKFLOW · owner master #686/6511339492. Link delivery is not acknowledgement.

[d6g8k5htny-coder]

FINITE PERSONAL ENGINEERING REVIEW PICKUP — MTW-MATH547-CONTACT-SMALL-GAP-REPAIR-REVIEW-GPT6-AUTOMATION11-20261030

Actual performer: OpenAI / ChatGPT GPT-6, existing Math Task Watch scheduled automation invocation 11. The connected GitHub surface exposes only shared principal d6g8k5htny-coder; no unique runtime/session or commit-author identity is inferred. This is a separate, source-exposed engineering review invocation of the repair candidate's three changed paths; same-family engineering review is permitted, but organizational-independence credit is 0 and scientific effect is NONE.

Canonical object, fresh source and contention

• Canonical task: Math-fix(Math-): bind contact-small-gap mutant failures to expected tests #547, repair of the two findings from Math-Followthrough audit: legacy wrappers outside #321 still accept unrelated mutant crashes #322 comment 6522289020.
• Author's existing repair pickup: Math-#322/6522587771. That authoring claim remains theirs; this review does not take it over.
• Repository/ref: d6g8k5htny-coder/Math-, PR fix(Math-): bind contact-small-gap mutant failures to expected tests #547, branch dcl/contact-small-gap-mutant-identity-20261030.
• Base: 19a55750451b8016b50d1d20be6a18c021807ecb.
• Head: f0256ef1bf3b9b24dd03915e58946779b773604e.
• Actual merge base from GitHub compare: 19a55750451b8016b50d1d20be6a18c021807ecb; 3 commits ahead / 0 behind.
• Exactly three changed paths: .github/workflows/contact-small-gap.yml, reviews/contact_kernel_tail_20260925/SOURCE_FILES.json, reviews/contact_kernel_tail_20260925/run_validation.py.
• Current-head Git blobs: workflow a1cae2e2fc3f703f51f40e5b491b2cc3550020fe; manifest a096b6bc5643b983ade7c9f3d02b6490e932ebab; runner c60624104972b5f619dfcf7c63429e573297125f.
• Fresh PR read: zero submitted reviews, zero inline review threads, zero task-local PR comments. Fresh Followthrough audit: legacy wrappers outside #321 still accept unrelated mutant crashes #322/#619/#684 claim scan found the DCL author pickup but no equivalent review pickup. The review scope is disjoint from the author's three-path write scope.

Finite review outcome

Review only: (1) exact per-mutant expected unittest failure-ID binding and its normal/optimized controls; (2) the new reviewer-input trigger coverage; (3) whether the current manifest/source identity contract still permits a false-green bypass; (4) candidate-bound hosted results and preserved scientific limitations. Publish one bounded engineering disposition and release only this review claim.

Dependencies and exclusions

Dependencies: unchanged test_contact_tools.py blob 9a1527a43ce032183a44a77af0f5c5ba20567670, contact_tools.py blob b51c077cad82eb78713afed2ab5548bdcf2f531b, reviewer inputs algebra_check.py blob 383dc4fd5ce29e5ae7e8d0dcc1b823d23de10d3c and REVIEW.md blob 4003ff13cf696389b9530fd445ee46daf3b4c646, and immutable candidate source at commit 32b80ee085dc6a40113d1e46e333cda50d57ba21. Exact-head hosted exact-replay run 41054303422 is SUCCESS; downstream run 41054303148 has downstream-replay SUCCESS while formal/formal-evidence was still IN_PROGRESS at last job readback; hypergraph run 41054303147 is SUCCESS. These are engineering/hosted observations, not proof acceptance.

No edits, commits, pushes, formal review object, proof/math/scientific review, workflow-security approval, dispatch, Ready transition, integration, merge, branch-protection/settings/permissions change, or theorem/status/index/register mutation. No use of the quota-only Codex route. Stop on head/base drift, competing review claim, a new substantive review, failed required check, or platform denial. Finite checkpoint: end of this run.

Current coordination: Main #619; CBZ-0 task hub: Main #684. #475 and #275 are preserved historical predecessors, not posting destinations.

Authority: complete owner mandate · standing delegation · Main AGENTS · Math- AGENTS · OP-WORKFLOW · review-family decision · owner master #686/6511339492. Links are not acknowledgements.

Only this finite engineering review is claimed.

[d6g8k5htny-coder]

SOURCE-EXPOSED ENGINEERING REVIEW RESULT / ONLY-OWN RELEASE
MTW-MATH547-CONTACT-SMALL-GAP-REPAIR-REVIEW-GPT6-AUTOMATION11-20261030

Disposition: AMEND_SCOPED_ENGINEERING — P1 MANIFEST/EXECUTED-RUNNER SELF-AUTHENTICATION BYPASS; PASS_SCOPED_EXPECTED_MUTANT_FAILURE_IDENTITIES; PASS_SCOPED_REVIEWER-INPUT_TRIGGER. This closes only my finite review pickup Math-#547/6522757014.

Actual performer: OpenAI / ChatGPT GPT-6, existing Math Task Watch scheduled automation invocation 11. GitHub exposes only shared principal d6g8k5htny-coder; no unique runtime/session or commit-author identity is inferred. Separate same-family engineering review is permitted; organizational-independence credit 0; scientific effect NONE. This is not a formal scientific review, proof review, theorem acceptance, workflow-security approval, authoring or integration decision.

Exact reviewed source

• Repository: d6g8k5htny-coder/Math-.
• PR fix(Math-): bind contact-small-gap mutant failures to expected tests #547 branch: dcl/contact-small-gap-mutant-identity-20261030.
• Base: 19a55750451b8016b50d1d20be6a18c021807ecb.
• Head: f0256ef1bf3b9b24dd03915e58946779b773604e.
• GitHub actual merge base: 19a55750451b8016b50d1d20be6a18c021807ecb; 3 ahead / 0 behind.
• Exact changed paths/blobs:
  • .github/workflows/contact-small-gap.yml — a1cae2e2fc3f703f51f40e5b491b2cc3550020fe.
  • reviews/contact_kernel_tail_20260925/SOURCE_FILES.json — a096b6bc5643b983ade7c9f3d02b6490e932ebab.
  • reviews/contact_kernel_tail_20260925/run_validation.py — c60624104972b5f619dfcf7c63429e573297125f.
• Post-pickup reread returned the same three blobs. PR still has no submitted reviews or inline threads; no equivalent reviewer claim appeared in the task-local/board reread.

Scoped passes

1. The runner now maps all seven named mutants to explicit expected unittest failure-ID sets. The declared 24-test count, no-error/no-skip requirements, exact failure count, exact ID set, and both normal and optimized modes are checked. The listed IDs correspond to the current unchanged test_contact_tools.py test methods. This repairs the prior P1 acceptance of any unrelated AssertionError as a mutant kill.
2. The workflow now includes reviews/pr16_fixed_transverse_nonauthor_20260925/** in pull_request.paths, covering the two reviewer inputs read by the job. This repairs the prior P2 consumed-input trigger gap.
3. Candidate-bound hosted observations:
   • exact replay run 41054303422: SUCCESS; pinned Python 3.11.16 step and replay job completed.
   • downstream run 41054303148: downstream-replay, formal/formal-evidence, and required math-downstream-gates jobs all SUCCESS.
   • organization-only hypergraph run 41054303147: SUCCESS.
     These are hosted engineering/Lean execution observations at this candidate, not proof correctness, independent scientific review, or scientific acceptance.

P1 — candidate-controlled manifest does not authenticate the runner it executes

The current run_validation.py identities() function loads SOURCE_FILES.json from the same candidate and verifies only the paths present in its files mapping. It does not require a fixed expected path set or independently authenticate the manifest. The workflow does not independently pin the manifest or runner identity.

Consequently, a candidate can remove run_validation.py from the manifest and replace that runner with code that creates the requested output directory and returns success without running the 24 tests or 14 normal/optimized mutant executions. The workflow invokes that candidate-controlled runner, then continues its separate reviewer-algebra step; it does not require or validate the runner's REPORT.json as an independently bound receipt. The mutable manifest therefore cannot prove that the code actually executed is the code intended for the replay.

This is a source-level control-flow counterexample; I did not modify the candidate or dispatch an adversarial hosted run. The exact three-file scope is not ready to claim that the wrapper's entire source-execution boundary is sound.

Required correction: authenticate the runner and manifest from an independently trusted source/base rather than from the candidate-controlled manifest; require the exact expected packet path set; and add an adverse candidate that removes the runner from the manifest and substitutes a no-op runner. A self-generated report alone is not an independent identity anchor.

Release and exclusions

Only this engineering-review pickup is released. The DCL author's repair pickup Math-#322/6522587771 remains their authoring claim. No source edits, commits, pushes, formal review object, workflow dispatch, Ready transition, branch update, integration, merge, protection/settings/permission mutation, proof or mathematical review, theorem/status/index/register mutation, or scientific promotion was performed. No quota-only Codex route was used.

Current coordination is Main #619; CBZ-0 task hub is Main #684. #475 and #275 remain preserved historical predecessors, not new posting destinations.

Authority: complete owner mandate · standing delegation · Main AGENTS · Math- AGENTS · OP-WORKFLOW · review-family decision · owner master #686/6511339492. Publication is not acknowledgement.

credit 0 · sci NONE · eng ≠ discharge · no flags · OBL OPEN

[d6g8k5htny-coder]

FINITE PERSONAL RESEARCH TASK WATCH ENGINEERING REVIEW PICKUP — RTW-MATH547-WORKFLOW-TRUST-ANCHOR-REVIEW-GPT6-AUTOMATION11-20261030

Actual performer: OpenAI / ChatGPT GPT-6, this existing Research Task Watch automation invocation. GitHub exposes only shared principal d6g8k5htny-coder; no unique runtime/session or commit-author identity is inferred. Source-exposed engineering review only; organizational-independence credit 0; scientific effect NONE.

Canonical task and eligibility

• Repository/PR: d6g8k5htny-coder/Math-#547, branch dcl/contact-small-gap-mutant-identity-20261030, OPEN / Draft.
• Current base: 19a55750451b8016b50d1d20be6a18c021807ecb.
• Current head: aba43cce0fad06c8ed8a6f6f8e5dfc1b495ffa8b.
• Exact changed paths: .github/workflows/contact-small-gap.yml, reviews/contact_kernel_tail_20260925/SOURCE_FILES.json, reviews/contact_kernel_tail_20260925/run_validation.py.
• Current blobs: workflow 10e958e0026b16d84155fc2f38f6539bbf54aed1; manifest a096b6bc5643b983ade7c9f3d02b6490e932ebab; runner c60624104972b5f619dfcf7c63429e573297125f. Base workflow blob 86cadd90ac8c68ded41e462d8c5f249780886dda.
• Existing DCL authoring pickup #322/6522587771 and continuation #322/6522880055 remain with their author; this is a separate review-only scope. Prior Math Task Watch review #547/6522797211 is released but binds the superseded head f0256ef1bf3b9b24dd03915e58946779b773604e. Fresh PR timeline had no review or review pickup for current head aba43cce...; the current diff adds only workflow-side trust pins and adverse controls, so this review is limited to that new workflow delta and its trust-boundary claim.

Finite output

1. Determine whether the workflow-side fixed Git-blob pins and manifest-removal/no-op-runner controls are independently anchored against a candidate-controlled workflow on a same-repository pull_request event.
2. Reconcile exact-head hosted evidence and identify whether any required check remains unobserved.
3. Publish one scoped engineering disposition with exact finding IDs/severity, source identity, evidence and limitations; then release only this review pickup.

Dependencies and exclusions

Dependencies: unchanged runner blob c60624104972b5f619dfcf7c63429e573297125f; manifest blob a096b6bc5643b983ade7c9f3d02b6490e932ebab; base workflow blob 86cadd90ac8c68ded41e462d8c5f249780886dda; current workflow blob 10e958e0026b16d84155fc2f38f6539bbf54aed1; exact-head runs 41056603630, 41056603615, and 41056603576. Governing records: Main AGENTS.md, Math- AGENTS.md, OP-WORKFLOW, complete owner mandate, standing delegation, review-family decision, and owner master #686/6511339492.

Excludes: no edits to any path; no author/integrator takeover; no formal GitHub review object; no workflow dispatch, rerun, Ready transition, integration, merge, protection/permission/settings change, security approval, proof/math/theorem/analytic review, scientific/status/index/GRAPH mutation, or change to any prior finding or historical outcome. Stop on head/base/path drift or a newly observed competing reviewer claim. Checkpoint at run end.

[d6g8k5htny-coder]

SOURCE-EXPOSED ENGINEERING REVIEW RESULT / ONLY-OWN RELEASE
RTW-MATH547-WORKFLOW-TRUST-ANCHOR-REVIEW-GPT6-AUTOMATION11-20261030

Disposition: AMEND_SCOPED_ENGINEERING — P1_CANDIDATE_CONTROLLED_WORKFLOW_TRUST_ROOT; PASS_SCOPED_PACKET_RUNNER_MANIFEST_BINDING; PASS_SCOPED_EXACT_HEAD_HOSTED_RUN_READBACK. This closes only my finite review pickup #547/6523168780. The DCL authoring pickup and its continuation remain unchanged. Actual performer: OpenAI / ChatGPT GPT-6, this existing Research Task Watch invocation; GitHub exposes only shared principal d6g8k5htny-coder, so no unique runtime/session or commit-author identity is inferred. Engineering review only; organizational-independence credit 0; scientific effect NONE. No formal GitHub review object is submitted.

Exact reviewed source

• Repository/PR: d6g8k5htny-coder/Math-#547, OPEN / Draft.
• Base: 19a55750451b8016b50d1d20be6a18c021807ecb.
• Head: aba43cce0fad06c8ed8a6f6f8e5dfc1b495ffa8b; GitHub compare: 4 ahead / 0 behind; actual merge base equals base.
• Exact changed paths: .github/workflows/contact-small-gap.yml, reviews/contact_kernel_tail_20260925/SOURCE_FILES.json, reviews/contact_kernel_tail_20260925/run_validation.py.
• Blobs: workflow 10e958e0026b16d84155fc2f38f6539bbf54aed1; manifest a096b6bc5643b983ade7c9f3d02b6490e932ebab; runner c60624104972b5f619dfcf7c63429e573297125f; base workflow 86cadd90ac8c68ded41e462d8c5f249780886dda.
• The current PR merge commit 26a2c519b9fc69b1d1a1a2d2c86d5cce26b5a9f6 contains the same candidate workflow blob 10e958e0....

P1 — workflow-side trust pins are not independent of the candidate

The new EXPECTED_BLOBS, EXPECTED_FILES, verify_packet() and manifest-removal/no-op-runner controls all live inside .github/workflows/contact-small-gap.yml. That workflow file is itself one of the three candidate-changed paths. The successful exact-head run is event pull_request, head aba43cce..., base 19a55750...; the PR merge commit also contains the candidate workflow blob. Thus the candidate supplies both the verifier and the values it calls fixed.

The adverse controls copy and mutate packet contents only. They do not mutate the workflow definition or its inline guard. A candidate revision can change the blob constants, remove verify_packet, remove the adverse controls, or replace the job body while preserving a successful job result. The new checks do prevent the tested packet-manifest/no-op-runner substitutions when this workflow body is held fixed, but they do not independently authenticate that body.

The Math- required-check contract at docs/FORMAL_REQUIRED_CHECKS.md (blob 82e7f6d96c51133951eee0a6780c3330375adcfd) identifies math-downstream-gates as the required Math- context and defines its dependencies as unchanged downstream replay plus the Mathlib package. It does not make this contact-specific exact-replay workflow an independently protected trust anchor. A separate green aggregate therefore does not authenticate the candidate-controlled contact workflow.

Narrow correction: place the trust decision in a base-owned/protected workflow or other independently maintained check whose definition is not supplied by this PR. It may fetch the candidate workflow/packet as data and validate exact identities; if it executes candidate code, use an appropriately isolated, read-only environment and never expose privileged credentials. Keep the existing candidate workflow's packet checks as defense in depth, not as their own trust root. The workflow itself must be covered by the trusted control. No implementation is made by this review.

Scoped passes and hosted evidence

• The unchanged runner/manifest blobs match the previously reviewed exact source. The seven mutant-to-test-ID mappings, 24-test count and normal/optimized controls remain within that prior engineering review's scope; this review does not repeat or enlarge it.
• Exact-head contact run 41056603630: event pull_request, exact head/base above, completed SUCCESS; exact-replay job SUCCESS. Artifact metadata: ID 12977051116, 110,851 bytes, SHA-256 c364437fd5aa43723b3695742f83b6fae2439c0aa18993b5e63af6d7acc7c31b. This review read metadata; it did not redownload or independently rehash the ZIP.
• Exact-head downstream run 41056603615: event pull_request, same head/base, completed SUCCESS; downstream-replay, formal / formal-evidence, and required math-downstream-gates all SUCCESS.
• Organization-only hypergraph run 41056603576: SUCCESS.
• No tests or workflows were executed by this reviewer. The runs above are current hosted evidence read from GitHub and are attributed to their actual run, not to this review.

Boundaries and release

PR remains OPEN / Draft. GitHub currently returns zero formal PR reviews and zero inline review threads. No Ready, integration, merge or scientific acceptance is inferred. The PR description still names the superseded f0256ef... head and pending checks; that stale prose was not edited under this workflow-only review scope.

A read of the Math main branch-protection endpoint returned HTTP 403 Resource not accessible by integration. I did not retry that denied protection read through another account, credential, tool or endpoint. No protection or permission change is claimed.

No source, branch, PR metadata, workflow, test, manifest, proof, register, GRAPH, status, or ownership was modified. Historical failed outcomes and prior review remain unchanged. Only this review pickup is released.

Authority: Main AGENTS.md · Math- AGENTS.md · CBZ-0 governance · OP-WORKFLOW · complete owner mandate · standing delegation · review-family decision · owner master #686/6511339492. Link delivery is not acknowledgement.

[d6g8k5htny-coder]

FINITE PERSONAL ENGINEERING / TRUST-BOUNDARY DESIGN PICKUP — RTW-MATH547-BASE-OWNED-TRUST-ANCHOR-DESIGN-GPT6-AUTOMATION11-20261030

Actual performer: OpenAI / ChatGPT GPT-6, this existing Research Task Watch invocation. The connected GitHub surface exposes only shared principal d6g8k5htny-coder; no unique runtime/session or commit-author identity is inferred. Source-exposed engineering/evidence design only; organizational-independence credit 0; scientific effect NONE. This is not a formal PR review, security certification, authoring, proof review, scientific acceptance, or integration decision.

Canonical task and exact source cut

• Canonical task-local object: Math- PR fix(Math-): bind contact-small-gap mutant failures to expected tests #547, dcl/contact-small-gap-mutant-identity-20261030, OPEN / Draft / unmerged.
• PR base: 19a55750451b8016b50d1d20be6a18c021807ecb.
• PR head: aba43cce0fad06c8ed8a6f6f8e5dfc1b495ffa8b.
• Current Math- main: 19a55750451b8016b50d1d20be6a18c021807ecb; current Main: 11e28815163e15223e8827fe6ff47a1faaf36ebd.
• Exact affected PR paths/blobs:
  • .github/workflows/contact-small-gap.yml — 10e958e0026b16d84155fc2f38f6539bbf54aed1 (base workflow blob 86cadd90ac8c68ded41e462d8c5f249780886dda).
  • reviews/contact_kernel_tail_20260925/run_validation.py — c60624104972b5f619dfcf7c63429e573297125f.
  • reviews/contact_kernel_tail_20260925/SOURCE_FILES.json — a096b6bc5643b983ade7c9f3d02b6490e932ebab.
• Existing P1 is exactly the candidate-controlled workflow trust root recorded in #547/6523213807. The prior DCL authoring pickup/continuation were released at Math-#322/6523142424; actual source-action attribution is preserved at #322/6523175524. This pickup takes no authoring or integration custody.

Finite output

Publish one source-bound design memo in this PR conversation that:

1. distinguishes the current candidate-controlled pull_request workflow from a verifier loaded from the protected base/default branch;
2. specifies a least-permission, non-executing base-owned verification path for the exact workflow/runner/manifest identities above;
3. identifies what must remain untrusted (candidate manifest, candidate workflow, candidate artifacts and logs) and what the base-owned verifier may safely inspect;
4. gives adversarial acceptance tests for workflow replacement, runner/manifest rebinding, extra/missing paths, mode/symlink changes, wrong base/head and stale or replayed receipts; and
5. states the remaining enforcement boundary if the trusted check is not required by repository protection.

Dependencies and authority

The exact three PR blobs and base workflow blob above; the current PR metadata/review collection; Main AGENTS.md; Math- AGENTS.md; CBZ-0 GOVERNANCE.md; OP-WORKFLOW-20260930; complete owner mandate; standing delegation; and 25 October review-family decision. Historical outcomes and all prior author/reviewer/claim ownership remain unchanged.

Explicit exclusions and stop conditions

No repository/source/test/workflow/branch/ref/PR mutation; no workflow dispatch/rerun; no artifact execution or download; no secrets, credentials, permission, ruleset or branch-protection read/write; no Ready transition, review approval, integration, merge, theorem/proof/Layer-A or scientific-status change. Stop and release only this design pickup if PR base/head, any listed blob, changed-path set, or task-local contention changes before the memo is posted. The result will be design guidance only; it cannot close P1 or establish an enforced gate.

[d6g8k5htny-coder]

SOURCE-BOUND TRUST-ANCHOR DESIGN / P1 PRESERVED — RTW-MATH547-BASE-OWNED-TRUST-ANCHOR-DESIGN-GPT6-AUTOMATION11-20261030

Disposition: DESIGN_COMPLETE / BASE_OWNED_TRUST_CHECK_REQUIRED / P1_NOT_CLOSED. This closes only pickup #547/6524587286. Actual performer: OpenAI / ChatGPT GPT-6, this Research Task Watch invocation; shared GitHub principal only, no unique runtime/session or source-author identity inferred. Source-exposed engineering design only; independence credit 0; scientific effect NONE. No source, workflow, branch, check, protection, Ready, integration or scientific state changed.

1. Exact defect and trust boundary

The reviewed candidate is still Math- PR #547, base 19a55750451b8016b50d1d20be6a18c021807ecb, head aba43cce0fad06c8ed8a6f6f8e5dfc1b495ffa8b.

At that head:

• candidate workflow .github/workflows/contact-small-gap.yml: blob 10e958e0026b16d84155fc2f38f6539bbf54aed1;
• runner reviews/contact_kernel_tail_20260925/run_validation.py: blob c60624104972b5f619dfcf7c63429e573297125f;
• candidate SOURCE_FILES.json: blob a096b6bc5643b983ade7c9f3d02b6490e932ebab;
• the pre-PR base workflow blob is 86cadd90ac8c68ded41e462d8c5f249780886dda.

The current candidate workflow is triggered by pull_request and contains the runner/manifest pins itself. It is one of the changed files. The PR can therefore replace the workflow, alter its pin constants, skip the verifier, or change the job/check name. The fact that its current workflow has contents: read, pinned actions and useful adverse controls does not authenticate the workflow definition that decides whether those controls run.

GitHub documents that pull_request uses the PR merge branch and its merge commit; the workflow file is run from that merge commit. By contrast, pull_request_target runs in the base-repository context and its workflow is taken from the base repository's default branch. See GitHub's event semantics and the security guidance for pull_request_target. The latter also warns that checking out and executing PR code in this privileged context creates a pwn-request risk.

2. Existing in-repository implementation pattern

Main already has a concrete base-owned, API-only intake implementation at Main tip 11e28815163e15223e8827fe6ff47a1faaf36ebd:

• .github/workflows/public-intake.yml, blob d1b421ea9959ef5aafa1036b119e619f6e5877e8;
• tools/public_intake_check.py, blob c5785c3b3122bf5679b14f294c2a6f422c365eba;
• tools/PUBLIC_INTAKE_DISCOVERY.md, blob 7b91500dcfa7833cfa92c48f0fed688da8208f06.

The workflow uses pull_request_target, explicit contents: read and pull-requests: read, checks out only the trusted default-branch checker at github.sha, disables persisted checkout credentials, and never checks out or executes submitted code. The checker reads PR metadata, changed paths, Git trees and blobs through the API; checks complete pagination and stable PR snapshots; requires regular-file tree modes; and verifies blob identities. Its own documentation explicitly limits the result to intake/routing, not engineering verification or scientific acceptance.

This is a reusable design precedent, not an automatic qualification of Math-#547 and not a claim that Main's check or protection settings transfer to Math-.

3. Recommended Math- implementation

Create a separate, base-owned verifier in Math- main before relying on it for #547. It should be a small workflow plus a trusted checker maintained on the default branch; the candidate PR must not supply either one.

Workflow boundary

• Trigger on pull_request_target for the Math- main base, with opened/reopened/synchronize/edited/ready-for-review events (and a deliberate maintainer-triggered re-evaluation path for an already-open PR after the verifier first lands).
• Use explicit least permissions: contents: read, pull-requests: read; no repository or organization secrets, no write-capable checkout credential, no cache/artifact reuse, and no candidate checkout. If an explicit Checks API write is needed to attach a result to the PR head, isolate that permission to the smallest step and verify the resulting check's head SHA and name; do not assume a base-context job is automatically the required PR-head check.
• Load only the checker from the trusted default-branch commit (the Main pattern's SHA-pinned checkout with ref: ${{ github.sha }}, persist-credentials: false, sparse path is suitable). Keep all commands and actions fixed in this base-owned workflow.

Checker boundary

1. Fetch the live PR by event PR number. Require the expected repository, base repository and base.ref == main; require the event head SHA to equal the live PR head SHA. Record base SHA, head SHA, head repository, state and changed-file count.
2. Read the complete paginated changed-file list. Require exactly the three authorized paths above, expected statuses, no duplicates, no rename/delete, and no extra path. Reject incomplete pages, API truncation, redirects, malformed data and unsupported counts.
3. Resolve the exact base and head commit trees through Git's API. Walk the packet path reviews/contact_kernel_tail_20260925 as a tree, not a filesystem path. Require the packet root to be a tree and each expected file to be a regular 100644 blob. Reject symlink mode 120000, gitlink mode 160000, executable mode, missing blobs, extra/missing descendants and any tree truncation.
4. Keep the trust pins in the base-owned checker, not in candidate-controlled EXPECTED_BLOBS or SOURCE_FILES.json. For this exact candidate, pin the workflow blob 10e958e..., runner blob c606241..., manifest blob a096b6b..., and the exact expected packet membership (the nine declared packet files plus SOURCE_FILES.json). Parse the pinned manifest only as data; require its path set to equal the base-owned expected set and independently verify each declared byte count/SHA-256 against the corresponding Git blob bytes. The manifest is an object being checked, never the authority that chooses what is checked.
5. Re-fetch the PR metadata after all reads and require the same base/head/repository/state/count. Any head/base movement during verification is a hard stale-event rejection; only a new event may evaluate the new source.
6. Emit a stable, dedicated result such as contact-small-gap-source-anchor that states only whether the exact source set and workflow identity match the base-owned allowlist. It must not say tests passed, proof passed, or scientific acceptance occurred.

The allowlist should be updated only by a separately reviewed change to the base-owned verifier. For this one candidate, pinning the exact workflow/runner/manifest blobs is intentionally narrow; a later candidate that changes any of them must first receive a new base-owned pin update. This avoids a circular self-approval and does not create a new task/status registry.

4. Execution and receipt treatment

The candidate's pull_request run may remain a supplementary test execution, but its workflow definition and runner are not trusted until the base-owned source check verifies their exact approved blobs. Do not let the candidate's own manifest, JSON report, artifact, stdout/stderr, or a self-reported commit field authenticate itself.

If the design later consumes a workflow-run result, the base-owned checker must bind it to the exact PR number, expected workflow ID/path, event type, candidate head SHA, base/merge identity and run attempt, and require a terminal native conclusion. A prior run, stale attempt, same-run old artifact, candidate-created receipt, or success on a different head must not satisfy the current head. Treat downloaded artifacts as untrusted bytes and independently hash/validate them before use. The source-anchor check by itself proves only source identity; it does not prove that the tests ran.

5. Adversarial acceptance matrix

Control	Required result
Replace/remove candidate workflow or alter its job/check name	Base-owned source check rejects workflow blob mismatch
Rebind runner or manifest pins; remove runner from manifest	Reject exact blob or exact manifest/path-set mismatch
Add, omit, rename or delete a packet file	Reject changed-path or packet-tree membership mismatch
Replace packet root/file with symlink, executable or gitlink	Reject non-tree/non-regular mode
Wrong repository, base branch or PR base	Reject
Event head differs from live PR head; head/base changes during reads	Reject as stale; require fresh event
Truncated tree, incomplete pagination, missing blob, redirect, malformed JSON or API denial	Fail closed / no positive result
Replay an older run, attempt, artifact or receipt	Reject unless all native identities bind to this exact PR head and current attempt
Exact approved blobs, exact paths/modes, correct base and stable live snapshot	Source-anchor check passes, with meaning limited to source identity

A useful positive test must also prove that the trusted workflow actually emits a check associated with the PR's current head. If the native association is not the head SHA, the implementation must use an explicitly created check on that SHA and verify it on readback. A passing job on the base SHA alone is not a PR-head gate.

6. Enforcement and remaining limits

A successful base-owned check is not an enforced merge block unless the repository's actual branch protection requires the exact trusted check context. The previous Math protection read returned 403 Resource not accessible by integration; this design does not retry through another account, credential, endpoint or proxy. Protection remains unverified. No claim is made that the check is currently required, that a merge is blocked, or that PR #547 is Ready.

Even after implementation, this would establish only source/workflow identity and, if separately bound, execution provenance. It would not establish the analytic correctness of the contact-small-gap result, the seven mutant mappings beyond the tests actually run, theorem acceptance, Layer-A compliance or CBZ-0 completion.

No repository code or settings were changed for this design. The P1 from #547/6523213807 remains open pending an independently reviewed base-owned implementation, adverse controls, exact-head hosted evidence, native PR-head check association and permitted protection qualification. The prior DCL authoring and source-action attribution, and Root's separate integration custody, remain unchanged.

Authority carried for any implementation handoff: Main AGENTS.md, Math- AGENTS.md, CBZ-0 governance, OP-WORKFLOW-20260930, complete owner mandate, standing delegation, and 25 October review-family decision. Links do not imply recipient acknowledgement.

[d6g8k5htny-coder]

RESULT / ONLY-OWN RELEASE — RTW-MATH547-BASE-OWNED-TRUST-ANCHOR-DESIGN-GPT6-AUTOMATION11-20261030

Disposition: DESIGN_COMPLETE / BASE_OWNED_TRUST_CHECK_REQUIRED / P1_NOT_CLOSED. This closes only my finite design pickup Math-#547/6524587286. Actual performer: OpenAI / ChatGPT GPT-6, this Research Task Watch invocation. GitHub exposes only shared principal d6g8k5htny-coder; no unique runtime/session or source-author identity is inferred. Engineering/evidence design only; independence credit 0; scientific effect NONE.

Verified source and result

Final PR readback immediately before release: Math-#547 remains OPEN / Draft / unmerged, base 19a55750451b8016b50d1d20be6a18c021807ecb, head aba43cce0fad06c8ed8a6f6f8e5dfc1b495ffa8b, three changed paths. Current Math- main remains 19a55750451b8016b50d1d20be6a18c021807ecb; Main remains 11e28815163e15223e8827fe6ff47a1faaf36ebd.

The design is grounded in exact candidate blobs:

• workflow 10e958e0026b16d84155fc2f38f6539bbf54aed1;
• runner c60624104972b5f619dfcf7c63429e573297125f;
• manifest a096b6bc5643b983ade7c9f3d02b6490e932ebab); and base workflow blob 86cadd90ac8c68ded41e462d8c5f249780886dda`.

The design uses the existing Main base-owned API-only pattern at Main 11e28815163e15223e8827fe6ff47a1faaf36ebd: workflow blob d1b421ea9959ef5aafa1036b119e619f6e5877e8, checker blob c5785c3b3122bf5679b14f294c2a6f422c365eba, design-doc blob 7b91500dcfa7833cfa92c48f0fed688da8208f06. This is a design precedent, not Math- implementation or transferred qualification.

Finite conclusion

A separate Math- default-branch-owned pull_request_target workflow/checker should:

• run only trusted base code with explicit read-only repository/pull-request permissions and no secrets;
• never check out, import, execute or consume candidate code/artifacts in the privileged job;
• fetch PR metadata, complete changed-path pages, commit trees and blobs via the API;
• pin the exact candidate workflow, runner and manifest blobs plus exact packet membership in base-owned code;
• verify every manifest entry against the Git tree/blob bytes, require regular-file modes and reject symlinks/gitlinks/executable or extra/missing paths;
• bind the event head/base to the live PR and recheck the final snapshot to reject stale or replayed results;
• emit a stable source-identity check whose meaning does not exceed what it actually verifies.

The candidate manifest and candidate workflow cannot be their own trust authority. The candidate pull_request workflow remains supplementary until the base-owned check verifies its exact approved blob. A passing source-anchor check alone does not prove test execution.

Preserved blockers and exclusions

The original P1 remains open: Math-#547 comment 6523213807. A trusted check is not a merge block unless the actual repository protection requires the exact PR-head check context. The prior Math protection read returned 403 Resource not accessible by integration; protection remains unverified and no alternate route was used.

No workflow was created or dispatched, no CI was rerun, no artifact was downloaded/executed, no source/branch/ref/PR/settings/protection changed, and no Ready/review approval/integration/merge or scientific/proof/Layer-A status was changed. The DCL authoring release and actual source-action attribution remain as recorded at Math-#322/6523142424 and Math-#322/6523175524. Root's integration custody is untouched.

Authority for any implementation handoff: Main AGENTS.md, Math- AGENTS.md, CBZ-0 governance, OP-WORKFLOW-20260930, complete owner mandate, standing delegation, and 25 October review-family decision. Links do not imply recipient acknowledgement.

Only this design pickup is released. No other role, author, reviewer or integration reservation is released.

[d6g8k5htny-coder]

FINITE PERSONAL ENGINEERING PICKUP — RTW-MATH547-BASE-OWNED-TRUST-CHECK-IMPLEMENTATION-GPT6-AUTOMATION11-20261030

Actual worker: OpenAI / ChatGPT GPT-6, existing Research Task Watch automation invocation 11. Connected GitHub exposes shared principal d6g8k5htny-coder; no unique runtime/session or commit-author identity is inferred. This is a bounded security-sensitive engineering implementation, not a security certification, scientific review, proof review, or integration role. Scientific effect NONE; mathematical/proof acceptance credit 0.

Canonical source, current ownership and availability

• Canonical task-local source/finding: Math- PR fix(Math-): bind contact-small-gap mutant failures to expected tests #547, OPEN / Draft / unmerged; current Main general board #619, CBZ-0 task hub #684. Preserve reviewed fold-chain proofs and conditional elder bridge sources #475 is closed historical board; Lean: fortieth-moment Markov tail and weighted cubic family bound #275 is the closed option-B architecture decision record; architecture successor #666. No new board or registry is created.
• Current Math- main/base: 19a55750451b8016b50d1d20be6a18c021807ecb, tree 0e28d1077fffb77e66ff635a112899ccb091b3ba.
• Exact fix(Math-): bind contact-small-gap mutant failures to expected tests #547 head: aba43cce0fad06c8ed8a6f6f8e5dfc1b495ffa8b; compare is 4 ahead / 0 behind with merge base exactly current Math main.
• Exact fix(Math-): bind contact-small-gap mutant failures to expected tests #547 changed-path set:
  1. .github/workflows/contact-small-gap.yml — candidate blob 10e958e0026b16d84155fc2f38f6539bbf54aed1; trusted base blob 86cadd90ac8c68ded41e462d8c5f249780886dda.
  2. reviews/contact_kernel_tail_20260925/run_validation.py — candidate blob c60624104972b5f619dfcf7c63429e573297125f.
  3. reviews/contact_kernel_tail_20260925/SOURCE_FILES.json — candidate blob a096b6bc5643b983ade7c9f3d02b6490e932ebab.
• Prior exact-head finding/design: #547/6523213807 and design result #547/6524727598: P1_CANDIDATE_CONTROLLED_WORKFLOW_TRUST_ROOT; the candidate workflow's own fixed pins are controlled by the candidate because that same workflow file is modified in the PR. The design result explicitly requires a separately base-owned verifier.
• Fresh PR/file/compare reads show exactly those three paths and no competing open PR for the new trust-check path. The prior design pickup is released; no active authoring pickup for this base-owned trust-check implementation was found. Root/B-003 integration custody is not claimed or transferred.

Finite expected output

Create one new branch from the exact current Math main and one Draft PR containing only:

1. .github/workflows/contact-small-gap-trust.yml: a base-owned, read-only pull_request_target check for PR fix(Math-): bind contact-small-gap mutant failures to expected tests #547 plus a manual workflow_dispatch entry point for the already-open PR. Explicit read-only contents / pull-requests permissions; pinned actions; checkout only github.sha (trusted base); no candidate checkout, import, shell execution, or artifact execution.
2. .github/scripts/verify_contact_small_gap_trust.py: standard-library-only API verifier. It must bind the event snapshot to the live PR API response, require the exact repository/PR/base/head branch and expected base/head source identities, paginate the changed-file API without truncation, require the exact three-path delta, and verify the candidate tree entries are regular mode-100644 blobs with the three pinned Git blob identities. All API operations are GET-only; redirects, malformed/duplicate JSON, truncated trees, missing data, stale events, fork heads, path/mode/blob drift and API errors fail closed.
3. tests/test_contact_small_gap_trust.py: positive and adverse controls for stale/mismatched event heads, wrong PR/repository/base/ref, fork, extra/missing/duplicate changed paths, truncated tree, missing path, symlink/tree mode, wrong blob and wrong size.

Run the trusted verifier's local unit tests in normal and optimized Python modes, read back the exact three new blobs/PR head, and record the result on this task-local thread. After the base-owned workflow is merged by its integrator, it can be invoked on the already-open #547 through the supported manual dispatch; no pre-merge hosted success is claimed. Security-sensitive workflow behavior remains subject to separate review and fresh hosted execution before any integration/acceptance decision.

Dependencies and explicit exclusions

Dependencies: current Main AGENTS.md, Math- AGENTS.md, current Main GOVERNANCE.md, OP-WORKFLOW-20260930.md, complete owner mandate, standing delegation, review-family decision, and owner master #686/6511339492. The existing Main public-intake pull_request_target workflow and tools/public_intake_check.py are read-only design precedents, not copied acceptance or authority.

Exclusions: no modification of #547, its branch, candidate workflow/runner/manifest, RESULTS.json, proof/theorem/premise, or scientific/status registers; no checkout or execution of candidate code; no permissions/secrets/ruleset/branch-protection changes; no required-check configuration changes; no Ready, merge, integration, source-owner takeover, or foreign-claim release; no claim of security certification, mathematical acceptance, G7, or CBZ-0. Do not route any platform denial through another account, credential, tool, endpoint or proxy. Stop on base/head drift, overlapping task-local custody, unavailable source/action pin, or a platform denial.

Current routes and authority carried: Main #619 · Main #684 · Main #666 · complete owner mandate · standing delegation · OP-WORKFLOW · owner master #686/6511339492. Link delivery is not acknowledgement.

[d6g8k5htny-coder]

RESULT / ONLY-OWN RELEASE — RTW-MATH547-BASE-OWNED-TRUST-CHECK-IMPLEMENTATION-GPT6-AUTOMATION11-20261030

Disposition: DRAFT_DELIVERED / EXACT_SOURCE_READBACK / AUTHOR_REPORTED_TESTS_35_OF_35_BOTH_MODES / AMEND_FINAL_PR_SNAPSHOT_REVALIDATION / DCL_REVIEW_ACTIVE / ONLY_OWN_AUTHORING_RELEASE. This closes only my authoring pickup #547/6525388129. It does not close the underlying trust-boundary P1 or qualify the new verifier.

Actual performer: OpenAI / ChatGPT GPT-6, existing Research Task Watch automation invocation 11. GitHub exposes only shared principal d6g8k5htny-coder; no unique runtime/session or commit-author identity is inferred. Organizational-independence credit 0; scientific effect NONE.

Exact source and delivered artifact

• Current Math- main and PR Add base-owned read-only trust check for Math #547 #549 base: 19a55750451b8016b50d1d20be6a18c021807ecb.
• Original target PR fix(Math-): bind contact-small-gap mutant failures to expected tests #547 remains OPEN / Draft, base 19a55750451b8016b50d1d20be6a18c021807ecb, head aba43cce0fad06c8ed8a6f6f8e5dfc1b495ffa8b.
• Candidate blobs checked by the new verifier: workflow 10e958e0026b16d84155fc2f38f6539bbf54aed1, runner c60624104972b5f619dfcf7c63429e573297125f, manifest a096b6bc5643b983ade7c9f3d02b6490e932ebab); base workflow blob 86cadd90ac8c68ded41e462d8c5f249780886dda`.
• Delivered separate Draft PR Math-#549, branch rtw/contact-small-gap-trust-anchor-20261030, head 1cc840f91bf7634962c42103b895cc2ba0ac1c41; compare is 1 ahead / 0 behind, merge base exactly current Math main.
• Exactly three added paths and verified Git blobs:
  • .github/workflows/contact-small-gap-trust.yml — 3b3fbebccca1d1d9981aa6387cda3d804fe774ff.
  • .github/scripts/verify_contact_small_gap_trust.py — cbea518165b3256f5f5c187b6c38570e448a70ba.
  • tests/test_contact_small_gap_trust.py — 82808bfa502837aab856d825a0944dcb1aaf767b.

The workflow uses pull_request_target and manual dispatch, read-only contents / pull-requests permissions, a pinned checkout of the trusted github.sha, sparse checkout of only the verifier, and persist-credentials: false. The verifier uses fixed-repository GET requests and inspects PR metadata, changed-file pages, commits and Git trees; it does not checkout, import or execute candidate code.

Verification and limitation

The PR body records 35/35 standard-library tests under python3 -B -I, 35/35 under python3 -O -B -I, and successful YAML parsing. This run read back all three exact files and confirmed the PR/base/head/path inventory. I did not independently rerun those tests in this invocation: the local container could not resolve github.com for a read-only clone. No alternate account, credential, endpoint or proxy was used. No hosted run exists for #549; the trusted workflow is not yet on the default branch.

New source-level AMEND finding for the active reviewer

In the verifier, verify() fetches the live PR once at line 318, then performs compare, changed-file and tree reads at lines 342–353 and returns PASS at line 354 without a final PR metadata re-fetch. The prior design #547/6524727598 required re-fetching after all reads and requiring the same base/head/repository/state/count. Existing test_live_head_drift_rejected covers drift before the initial fetch, not a mid-run change. A PR mutation after the first snapshot can therefore leave a stale snapshot producing PASS_SCOPED_SOURCE_IDENTITY.

I recorded this for the existing DCL reviewer on #549/6528405246. DCL's finite review pickup #549/6528201898 remains active; no formal review object or review thread is yet present. I did not modify the branch while that review is active. Severity/disposition of the new race finding remains for that review; the candidate is not security-qualified.

Exclusions and release

No change to #547, its branch or candidate files; no workflow dispatch, artifact execution, protection/ruleset/permission change, Ready transition, integration or merge; no proof, theorem, premise, scientific register or acceptance change. Root/B-003 integration custody and DCL review custody remain untouched. No hosted or security certification is claimed.

Only my authoring pickup #547/6525388129 is released. The active DCL review and Root's integration role are not released or transferred.

Authority carried: Main AGENTS · Math- AGENTS · CBZ-0 governance · OP-WORKFLOW · complete owner mandate · standing delegation · review-family decision · owner master #686/6511339492. Links are not recipient acknowledgement.