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fix(coverage): validate nested npm metadata through canonical pins - #807

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fix/npm-nested-metadata-lock-validation
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fix(coverage): validate nested npm metadata through canonical pins#807
seonghobae wants to merge 52 commits into
mainfrom
fix/npm-nested-metadata-lock-validation

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@seonghobae

@seonghobae seonghobae commented Aug 6, 2026

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Problem

Central changed-head npm-lock validation historically required every non-link node_modules location to repeat its own registry tarball and SHA-512 integrity. npm v2/v3 can serialize workspace or peer locations with version/classification metadata while one canonical location carries the artifact pin, so valid BandScope-style entries were blocked despite an exact canonical root pin.

Exact current state

  • exact head: f3ef0af11863255aee1ad8b875676d656ab99a68;
  • protected base/main: e71fdab2ab088001f218765ecb5e3b7fabfee11a;
  • state: Draft / complete-suite RED;
  • predecessor-head checks and reviews are stale.

Canonical npm metadata implementation

  • Derive scoped or unscoped package identity only from segments after the final node_modules.
  • Accept metadata-only nested locations only when node_modules/<same exact identity> in the same authenticated lock is a non-link canonical entry with identical exact version, a public registry.npmjs.org HTTPS tarball, and one canonical SHA-512 SRI value.
  • Validate independently complete nested pins without forcing them to reuse the canonical version.
  • Reject malformed identities, canonical metadata-only entries, missing canonical metadata, version mismatch, partial/conflicting pins, links, userinfo, every explicit port including :443, query/fragment data, hostile origins, non-tarball URLs, and invalid SRI.
  • Consume the authenticated lock unchanged and never fetch, repair, infer, or rewrite dependency metadata.
  • Copy workspace manifests only when they are regular blobs in the authenticated base tree.

Current exact-head evidence

At f3ef0af11863255aee1ad8b875676d656ab99a68:

  • the focused JavaScript materializer slice reports 101 passed;
  • scripts/ci/materialize_base_javascript_packages.py reports 439/439 statements and 178/178 branches covered;
  • the complete central suite run 31163640520, job 92831568748, reports 3 failed, 1022 passed.

The three remaining production defects are:

  1. capability preflight does not fail before mutation when no-follow os.stat(..., follow_symlinks=False) support is unavailable;
  2. _open_output_directory still creates missing path components through mutable absolute-path re-resolution rather than a descriptor-relative mkdirat/openat walk;
  3. a late write failure inside a newly owned project-NNN directory does not yet remove every object created by that attempt through an inode-bound descriptor-relative cleanup while preserving pre-existing operator files.

Required GREEN repair

Fix those three descriptor-publication regressions test-first without weakening the canonical npm pin contract. Cleanup and creation must remain descriptor-relative, no-follow, inode-bound, and fail closed. Do not add temporary, one-shot, self-modifying, encoded-patch, or branch-writer workflows; do not use path-based recursive deletion or follow symlinks.

Standards and merge gate

docs/doctoring/npm-nested-metadata-canonical-pins.md records the trust boundary, explicit-port policy, failure and rollback behavior, and APA 7 references to npm package-lock format and Subresource Integrity. Keep Draft until the three regressions, focused suite, complete central suite, 100% production statement/branch/docstring evidence, compilation, current-head security/supply-chain checks, automated review, qualifying independent non-author approval, zero actionable threads, and branch protection all succeed without bypass.

Refs ContextualWisdomLab/bandscope#751 and #748.

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coderabbitai Bot commented Aug 6, 2026

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Review details
⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro Plus

Run ID: bbc727d5-a412-404c-8755-4d1ef1cdae4a

📥 Commits

Reviewing files that changed from the base of the PR and between d4303cc and f3ef0af.

📒 Files selected for processing (10)
  • .github/workflows/npm-nested-metadata-validation-quality-ci.yml
  • CHANGELOG.md
  • docs/doctoring/npm-nested-metadata-canonical-pins.md
  • scripts/ci/materialize_base_javascript_packages.py
  • tests/test_javascript_materializer_creation_cleanup_security.py
  • tests/test_javascript_materializer_descriptor_ancestry.py
  • tests/test_javascript_materializer_existing_directory_coverage.py
  • tests/test_javascript_materializer_output_edge_coverage.py
  • tests/test_javascript_materializer_output_security.py
  • tests/test_npm_nested_metadata_lock_validation.py
📝 Walkthrough

Walkthrough

npm lockfile v2/v3의 중첩 metadata-only 위치에 대한 canonical pin 검증을 추가했습니다. 관련 회귀 테스트, 정책 문서, 변경 이력과 품질 CI도 추가했습니다.

Changes

npm 중첩 메타데이터 검증

Layer / File(s) Summary
Lockfile 핀 검증 구현
scripts/ci/materialize_base_javascript_packages.py
패키지 identity를 추출하고 HTTPS npm registry tarball과 단일 SHA-512 integrity를 검증합니다. 중첩 metadata-only 위치는 canonical root pin과 버전이 같을 때 허용합니다.
검증 회귀 테스트
tests/test_npm_nested_metadata_lock_validation.py
정상적인 root pin 재사용과 독립 pin을 검증합니다. 잘못된 identity, 버전, URL, integrity, 경로와 선택적 workspace metadata 처리도 검증합니다.
정책 문서와 품질 CI
docs/doctoring/npm-nested-metadata-canonical-pins.md, CHANGELOG.md, .github/workflows/npm-nested-metadata-validation-quality-ci.yml
canonical pin 정책과 거부 조건을 문서화합니다. Python 호환성, 컴파일, docstring, 커버리지와 git diff --check 검사를 CI에 추가합니다.

Estimated code review effort: 4 (Complex) | ~45 minutes

Sequence Diagram(s)

sequenceDiagram
  participant GitHubActions as GitHub Actions
  participant Tests as npm lock validation tests
  participant Materializer as materialize_base_javascript_packages.py
  participant Lockfile as npm lockfile
  GitHubActions->>Tests: 대상 테스트와 커버리지 실행
  Tests->>Materializer: lockfile materialization 호출
  Materializer->>Lockfile: package metadata 읽기
  Materializer-->>Tests: pin 검증 결과 반환
  Tests-->>GitHubActions: 테스트 및 커버리지 결과 보고
Loading
🚥 Pre-merge checks | ✅ 5
✅ Passed checks (5 passed)
Check name Status Explanation
Docstring Coverage ✅ Passed No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check ✅ Passed Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check ✅ Passed Check skipped because no linked issues were found for this pull request.
Description Check ✅ Passed Check skipped - CodeRabbit’s high-level summary is enabled.
Title check ✅ Passed 제목은 canonical pin을 통한 중첩 npm 메타데이터 검증 변경을 명확하고 간결하게 설명하며 주요 변경 사항과 일치합니다.
✨ Finishing Touches
📝 Generate docstrings
  • Create stacked PR
  • Commit on current branch
🧪 Generate unit tests (beta)
  • Create PR with unit tests
  • Commit unit tests in branch fix/npm-nested-metadata-lock-validation

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@opencode-agent

Implement the bounded GREEN slice on exact current head cf014e8441e8ffbe8b41d93585ceb5c1a3d5bd4a, then remove .github/workflows/materialize-npm-nested-metadata-validation.yml from the final tree. Do not add any other one-shot or branch-writing workflow.

Apply the permanent tests and minimal production changes already specified by the branch contract:

  • accept a metadata-only nested npm v2/v3 node_modules location only when one canonical root package has the same exact package identity/version and one valid public npm-registry .tgz URL plus SHA-512 SRI;
  • reject malformed scoped identities, missing/empty version, partial resolved/integrity, version mismatch, missing canonical metadata, non-registry URL, invalid SRI, and conflicting complete pins;
  • preserve path/link, traversal, userinfo, port, query, fragment, lock-version, exact-head, and immutable-materialization boundaries;
  • consume the validated lock unchanged;
  • add BandScope-shaped positive/negative regressions, APA 7 doctoring, and CHANGELOG evidence;
  • run focused RED/GREEN tests, complete central tests, 100% production statement/branch coverage, 100% public docstrings, Ruff, compilation, and git diff --check.

Keep Draft and do not approve, merge, release, or change reviewer credentials.

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Release blocker: current branch contains only a trigger and branch-materialization workflows (.github/npm-nested-metadata.trigger, materialize-npm-nested-metadata-validation.yml, trigger-npm-nested-metadata-materializer.yml). Do not run or merge a PR-controlled workflow that rewrites and pushes its own reviewed source.

@opencode-agent address

Remove every trigger, self-removing materializer, encoded patch, and branch-writing helper from the final tree. Preserve the test-first intent, but publish the four permanent implementation/test/doctoring/changelog files through ordinary reviewed commits. The final production rule may accept a metadata-only nested npm v2/v3 location only when one canonical root package with the same normalized identity and exact version has a valid public npm-registry tarball and SHA-512 SRI. Continue to reject missing canonical metadata, version mismatch, partial pins, malformed scoped identities, non-registry origins, userinfo/query/fragment/port abuse, invalid SRI, conflicting complete pins, unsafe paths, and links. Consume the lock unchanged; do not repair or synthesize metadata. Require exact-head Python 3.10/3.14 tests, 100% production statement/branch/docstring evidence, compilation, all security/supply-chain checks, current-head review, and independent approval before Ready.

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@jules Replace the trigger/materializer-only scope on exact live head 4b2fceea5cbbff929623fec85b371f7f0bbe2898 with ordinary reviewed permanent implementation, tests, APA 7 doctoring, and CHANGELOG commits. Keep Draft.

Delete .github/npm-nested-metadata.trigger, .github/workflows/materialize-npm-nested-metadata-validation.yml, and .github/workflows/trigger-npm-nested-metadata-materializer.yml; do not add another branch writer, encoded patch, trigger, source snapshot, or temporary workflow.

Implement the narrow npm v2/v3 rule directly: a metadata-only nested node_modules location is accepted only when exactly one canonical root package has the same normalized scoped/unscoped identity and exact nonempty version, a valid https://registry.npmjs.org/...tgz URL, and one valid SHA-512 SRI. Reject missing or ambiguous canonical metadata, version mismatch, partial pins, malformed identities, conflicting complete pins, non-registry origin, port/userinfo/query/fragment abuse, invalid integrity, unsafe path, or link. Consume the original lock unchanged; never repair or synthesize metadata.

Add the BandScope-shaped positive case and every stated negative case. Run Python 3.10/3.14, focused and complete central tests, 100% production statement/branch/public-docstring coverage, Ruff, compileall, workflow contract, security and supply-chain checks, and git diff --check. Commit normally; no amend, force-push, Ready transition, approval, merge, release, reviewer-credential change, or protection change. Stop without mutation if the live head differs before writing.

Comment thread .github/workflows/pr807-apply-nested-metadata-once.yml Fixed

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/oc

Fix the current exact-head failure directly in permanent source; do not rely on, add, or retain a one-shot/branch-writer workflow.

The Python 3.14 quality run proves 12 focused failures because scripts/ci/materialize_base_javascript_packages.py still executes the old rule that every non-link node_modules location must carry local resolved and integrity. Apply the reviewed logic currently represented by scripts/ci/apply_pr807_nested_metadata.py:

  • derive an exact scoped or unscoped package identity after the final node_modules segment;
  • keep complete local pins subject to the existing HTTPS npm-registry URL and SHA-512 SRI checks;
  • reject a partial resolved/integrity pair;
  • allow a metadata-only nested location only with a nonempty exact version and one canonical node_modules/<identity> non-link entry whose exact version matches and whose complete registry/SRI pin validates;
  • reject metadata-only canonical-root entries, malformed identities, missing/linked canonical entries, mismatched versions, hostile origins, and invalid integrity;
  • preserve lockfile-v2/v3, path, traversal, workspace-link, userinfo, port, query, fragment, tarball, and unchanged-lock-byte boundaries.

Add the APA 7 doctoring and CHANGELOG entry, remove scripts/ci/apply_pr807_nested_metadata.py and .github/workflows/pr807-apply-nested-metadata-once.yml from the final tree, and keep only the permanent quality workflow. Run the two focused suites with 100% branch coverage, production docstrings, Python 3.10/3.14 compilation, complete central tests/coverage, and git diff --check. Keep Draft until the workflow-free exact head is green.

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@opencode-agent address

The branch has been restored to a reviewable TDD state at exact head 0ce11b73992851afe991a5e86991db398c9d9900: every PR-controlled writer, trigger, one-shot materializer, and patch applicator has been deleted. Do not recreate any source-writing workflow.

Implement the permanent change directly in scripts/ci/materialize_base_javascript_packages.py through an ordinary reviewed commit. Preserve every existing v2/v3 path, workspace-link, HTTPS public-registry, port/userinfo/query/fragment, SHA-512 SRI, and unchanged-lock boundary. Required contract:

  • parse each non-link node_modules location into one exact scoped or unscoped package identity from the suffix after its last node_modules component;
  • a complete location must still validate its own resolved and integrity exactly as today;
  • a metadata-only location may omit both fields only when it has a nonempty exact string version and one canonical root key node_modules/<identity> has the same version plus a complete valid public-registry tarball and SHA-512 pin;
  • reject canonical root entries that are themselves metadata-only, missing, malformed, version-mismatched, or partial;
  • reject any location declaring exactly one of resolved/integrity as must not partially declare;
  • preserve independently complete nested pins even when their version differs from the canonical root;
  • reject malformed scoped identities such as @scope without a package and extra components after a scoped package;
  • consume the lock unchanged; do not repair or synthesize fields.

Keep tests/test_npm_nested_metadata_lock_validation.py authoritative, add complete statement/branch/docstring coverage in the existing permanent quality workflow, update APA 7 doctoring and CHANGELOG.md through ordinary commits, then rerun every exact-head quality/security/supply-chain gate. Keep Draft and merge-block labels until GREEN and independent approval.

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@opencode-agent address

Implement the permanent production change on exact current Draft head 0ce11b73992851afe991a5e86991db398c9d9900. Quality run 31139010086 proves Python 3.10 compilation and every security/supply-chain gate are green, while the Python 3.14 focused job has 12 RED failures because the branch currently contains only the quality workflow and tests; scripts/ci/materialize_base_javascript_packages.py is unchanged.

Apply the minimal two-pass validator:

  1. Parse and validate every package location/path and workspace link exactly as today.
  2. Derive the npm package identity from the suffix after the last node_modules component:
    • unscoped identity: exactly one nonempty segment;
    • scoped identity: exactly two nonempty segments, first beginning with @;
    • reject incomplete or extra-segment identities as malformed npm package identity.
  3. Classify each non-link location:
    • complete pin: version, resolved, and integrity all present; validate nonempty version, exact public npm HTTPS tarball provenance, no port/userinfo/query/fragment, and one SHA-512 SRI;
    • metadata-only: none of resolved/integrity present; require a nonempty exact version;
    • partial pin: exactly one of resolved/integrity present; fail with must not partially declare.
  4. Build canonical pins only from complete root locations of the exact form node_modules/<identity>—not nested copies. Preserve independently complete nested pins as independently validated artifacts.
  5. For each metadata-only location, require exactly one safe canonical root pin with the same package identity and exact version. Fail separately for missing canonical root pin and version mismatch.
  6. Do not repair, synthesize, reorder, or rewrite the lockfile; validation only.

Add scripts/ci/materialize_base_javascript_packages.py, APA 7 doctoring, and CHANGELOG.md to the permanent PR scope and quality-workflow triggers. Keep the branch workflow-free except the permanent read-only quality gate; no self-removing or write-capable patcher may return.

Run:

python -m coverage erase
python -m coverage run --branch -m pytest -q \
  tests/test_materialize_base_javascript_packages.py \
  tests/test_npm_nested_metadata_lock_validation.py
python -m coverage report \
  --include=scripts/ci/materialize_base_javascript_packages.py \
  --show-missing --fail-under=100
python -m interrogate scripts/ci
python -m compileall -q scripts/ci tests
pytest -q

Then rerun exact-head CodeQL, Python Security, SAST, Security Scan, Secret Scan, OSV, Scorecard, SBOM, CodeRabbit/OpenCode/Noema, and keep Draft until all evidence is current and a qualifying independent approval exists.

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@opencode-agent address

Exact head 0ce11b73992851afe991a5e86991db398c9d9900 has Python 3.10 compatibility and every security/supply-chain gate green. Python 3.14 focused quality is intentionally RED: 44 passed, 12 failed, all because validate_head_npm_lock() still requires every non-link node_modules location to repeat resolved and integrity.

Implement the minimum permanent production correction directly in scripts/ci/materialize_base_javascript_packages.py; do not reintroduce a PR-controlled source-rewriting workflow.

  • Derive package identity from the final node_modules segment. An unscoped identity is exactly one following segment; a scoped identity is exactly @scope/name. Reject an empty scope/name, @scope without a package, or any extra path segment after the identity as malformed npm package identity.
  • Classify artifact fields exactly: both resolved and integrity = complete pin; neither = metadata-only; exactly one = fail with must not partially declare.
  • Continue validating every complete pin with the existing closed public npm-registry HTTPS/tarball/SHA-512 contract.
  • Build canonical root pins only from exact top-level paths node_modules/name and node_modules/@scope/name. A root canonical entry must be a complete validated pin; a metadata-only root entry fails with canonical root pin.
  • A metadata-only nested location must have one nonempty exact string version, resolve to a complete validated canonical root pin with the same package identity, and match its exact version. Otherwise fail with the committed canonical root pin, nonempty exact version, or exact canonical version contract.
  • A fully and independently pinned nested package remains valid even when a canonical root package with the same identity has a different version. Never synthesize, repair, or mutate lock metadata.
  • Preserve link/path safety, lockfile v2/v3, registry URL, port/userinfo/query/fragment, tarball identity, integrity, bounded parsing, and fail-closed behavior.

Add the permanent production tests to the authoritative existing module, complete public docstrings, APA 7 doctoring and CHANGELOG.md; update the stale PR body so it no longer claims a self-removing workflow. Run focused 100% production statement/branch/docstring coverage, Python 3.10/3.14 compilation, the complete central suite, actionlint, and all security/supply-chain gates on one unchanged head. Keep Draft until GREEN.

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@opencode-agent address

Implement the permanent GREEN production change for exact head 0ce11b73992851afe991a5e86991db398c9d9900 directly through ordinary reviewed commits. Do not add a trigger, materializer, repair, self-removing, encoded-patch, or branch-writing workflow.

Update scripts/ci/materialize_base_javascript_packages.py::validate_head_npm_lock test-first so npm v2/v3 metadata-only nested locations are accepted only through one exact canonical root pin:

  1. Parse and validate every node_modules path first. Derive the package identity from the segments after the final node_modules: exactly one unscoped segment or exactly @scope/name; reject incomplete scopes and extra segments as malformed npm package identity.
  2. Require every non-link package entry to have a nonempty string version.
  3. Classify resolved/integrity as both absent, both present, or partial. Reject partial declarations as must not partially declare.
  4. Validate every complete pin with the existing exact HTTPS registry URL, port/userinfo/query/fragment/tarball, and SHA-512 SRI controls.
  5. A root entry at exactly node_modules/<identity> must be a complete pin; a metadata-only root entry fails with canonical root pin.
  6. A metadata-only nested entry may inherit only the complete canonical root pin for the same identity and exact version. Reject missing root pins and version mismatches with the permanent contract messages.
  7. Independently complete nested pins remain valid, including a different nested version.
  8. Preserve link handling, path safety, lockfile v2/v3 constraints, and all pre-existing tests.

Then add authoritative npm v11 package-lock doctoring with APA 7 primary-source references and CHANGELOG.md, include implementation/docs/changelog in the permanent quality workflow path filters, run focused tests with 100% production statement/branch coverage and docstrings, run the complete central suite, compile, remove all transient scope, and leave the PR Draft until the workflow-free exact head is green.

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/oc

Refetch PR #807 and repair only its live Draft head; abort if another writer moved it. Use the three failing full-suite regressions as RED evidence. Implement descriptor-relative ancestor creation and complete identity-bound rollback in scripts/ci/materialize_base_javascript_packages.py, require immutable os.stat follow-symlink capability alongside the existing callable-identity checks, and preserve operator-owned/pre-existing objects. The attacker-root swap must never create attacker_root/missing_parent/generated_locks; a late write failure must remove every object created by this attempt but refuse to remove replaced or foreign identities. Keep the canonical npm pin behavior unchanged. Add only necessary permanent regressions, run the focused materializer suite and full exact-head suite with 100% statement/branch/docstrings, and commit directly. Do not create a repair workflow, staged patch, or force-push.

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@coderabbitai Please fix the three exact-head full-suite regressions directly on branch fix/npm-nested-metadata-lock-validation and commit the change, not as a stacked PR. Preserve the focused nested-metadata feature and all existing registry/SRI validation.

Current head f3ef0af11863255aee1ad8b875676d656ab99a68 has 101 focused tests and 100% production statement/branch/docstring evidence, but the complete central suite fails three security/rollback contracts in scripts/ci/materialize_base_javascript_packages.py:

  1. _require_descriptor_relative_capabilities() must fail before any mutation when the required follow_symlinks=False capability is unavailable. Check the exact functions used with follow_symlinks=False against os.supports_follow_symlinks rather than accepting only os.supports_dir_fd and flag constants.
  2. _open_output_directory() must not create a missing output path through pathname-based Path.mkdir() after an ancestor can be swapped to an attacker symlink. Create/bind missing ancestors and the output directory descriptor-relatively from a trusted opened ancestor, with O_NOFOLLOW, inode checks, and cleanup that never follows the replaced pathname.
  3. On a late write failure, rollback must remove every file and directory created by this materialization attempt while preserving pre-existing operator files. Track owned generated entries and remove them descriptor-relatively in reverse order, validating their original inode/type before deletion; do not leave project-000 behind.

Run these failing tests first:

  • test_materializer_rejects_missing_follow_symlink_capability_before_mutation
  • test_missing_ancestor_swap_never_creates_output_through_attacker_symlink
  • test_late_write_failure_rolls_back_every_owned_file_and_directory

Then run the focused 100% coverage/docstring checks, complete central suite, Python 3.10 compatibility, compilation, and git diff --check. Do not weaken or delete the tests, open another PR, mark Ready, or merge.

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/oc

Fix the exact-head npm Nested Metadata Validation Quality CI failures on f3ef0af11863255aee1ad8b875676d656ab99a68 directly in permanent source and tests; keep the PR Draft. Do not add a one-shot/self-mutating/branch-writer workflow.

The focused 101-test materializer suite and 100% production statement/branch/docstring gates pass, but the complete central suite exposes three real creation/rollback security gaps:

  1. Capability preflight before mutation. materialize() must reject before creating any output path when descriptor-relative no-follow stat support is unavailable. Check the exact callable membership required by the implementation in os.supports_follow_symlinks (and the matching dir_fd/FD capabilities already relied upon), rather than treating an instrumented wrapper identity as equivalent capability.
  2. Missing-ancestor swap. Never use pathname-based recursive Path.mkdir() after validating a parent. Create each missing output component descriptor-relatively from a pinned ancestor with no-follow semantics, immediately pin and validate the created directory, and fail without ever creating attacker_root/.../generated_locks if an ancestor pathname is replaced by a symlink during creation.
  3. Complete owned-artifact rollback. Track every file and directory created by the invocation. On a late write/no-progress/fsync/validation failure, remove generated files and then empty invocation-owned directories in reverse order through their pinned descriptors, while preserving pre-existing operator files/directories. The failing example must leave only operator-note.txt, not an empty project-000 directory.

Add tests/test_javascript_materializer_creation_cleanup_security.py to the focused pytest and compileall lists so these contracts cannot regress outside the complete suite. Preserve canonical npm identity/version/SHA-512 validation, existing-directory behavior, descriptor ancestry, no-follow output writes, exact error privacy, and the authenticated-base boundary.

Run the focused suite with all seven materializer test files, complete central tests, 100% production statement/branch coverage and docstrings, Python 3.10/3.14 compilation, security/supply-chain workflows, and git diff --check. Keep the final ten-file permanent scope and update doctoring/CHANGELOG only where the strengthened creation/rollback boundary requires it.

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coderabbitai Bot commented Aug 7, 2026

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🧩 Analysis chain

🏁 Script executed:

#!/bin/bash
set -euo pipefail

repo='ContextualWisdomLab/.github'
expected_head='f3ef0af11863255aee1ad8b875676d656ab99a68'

printf '%s\n' '== PR head =='
git rev-parse HEAD
gh pr view 807 --repo "$repo" --json headRefOid,isDraft,state,url \
  --jq '{headRefOid,isDraft,state,url}'

printf '%s\n' '== Production structure =='
ast-grep outline scripts/ci/materialize_base_javascript_packages.py --items all --view expanded
rg -n -A260 -B30 \
  'def _require_descriptor_relative_capabilities\b|def _open_output_directory\b|class SecureOutputTree\b|def materialize\b|def _cleanup|def _write|def _open|def validate_head_npm_lock\b|def _validate_npm_registry_pin\b' \
  scripts/ci/materialize_base_javascript_packages.py

printf '%s\n' '== Relevant test structure and assertions =='
fd -t f 'test_javascript_materializer_(creation_cleanup_security|output_security|descriptor_ancestry|output_edge_coverage)\.py' tests -x ast-grep outline {} --items all --view expanded
rg -n -A35 -B15 \
  'test_materializer_rejects_missing_follow_symlink_capability_before_mutation|test_missing_ancestor_swap_never_creates_output_through_attacker_symlink|test_late_write_failure_rolls_back_every_owned_file_and_directory|supports_follow_symlinks|supports_dir_fd|rollback|cleanup|attacker_root|operator-note|project-000' \
  tests

printf '%s\n' '== Workflow scope =='
sed -n '1,300p' .github/workflows/npm-nested-metadata-validation-quality-ci.yml

Length of output: 159615


@seonghobae I verified PR #807 at exact Draft head f3ef0af11863255aee1ad8b875676d656ab99a68.

The three failures are valid.

  • _require_descriptor_relative_capabilities() checks _REQUIRED_DIR_FD_FUNCTIONS against os.supports_dir_fd.
  • It does not require the import-time os.stat callable in os.supports_follow_symlinks.
  • _open_output_directory() still uses candidate.parent.mkdir(parents=True, exist_ok=True) and candidate.mkdir(exist_ok=True).
  • Failed project cleanup only attempts to remove the project directory. It cannot remove previously created files and nested directories.
  • The permanent quality workflow omits tests/test_javascript_materializer_creation_cleanup_security.py from path triggers, Python 3.10 compilation, focused coverage, and focused compilation.

Permanent repair scope

  1. Update _require_descriptor_relative_capabilities() to require:

    • every import-time callable in _REQUIRED_DIR_FD_FUNCTIONS in the live os.supports_dir_fd set;
    • the import-time os.stat callable in the live os.supports_follow_symlinks set; and
    • O_DIRECTORY and O_NOFOLLOW.

    This keeps transparent os.open instrumentation valid. It still fails before output creation when the runtime lacks required capability support.

  2. Replace the pathname creation in _open_output_directory().

    • Open the filesystem root descriptor.
    • Walk each existing output ancestor with dir_fd, _DIRECTORY_OPEN_FLAGS, and follow_symlinks=False.
    • Create each missing component with os.mkdir(..., dir_fd=parent_fd).
    • Record the no-follow device/inode identity immediately after creation.
    • Reopen each created component through the held parent descriptor.
    • Compare the descriptor identity with the recorded entry identity.
    • fsync the parent after each created directory entry.
    • Retain final output-path binding verification.

    The existing ancestor-swap test should move its injection point from pathlib.Path.mkdir to the descriptor-relative os.mkdir call. The test must continue to prove that attacker_root/missing_parent/generated_locks is absent.

  3. Add an ownership journal for each new project-NNN directory.

    • Record each created regular file with its held parent descriptor, basename, and device/inode identity.
    • Record each created nested directory with its held parent descriptor, basename, and device/inode identity.
    • On any project write, synchronization, or validation failure, remove journaled files first.
    • Remove journaled directories in reverse creation order.
    • Remove project-NNN last.
    • Before each removal, use no-follow os.stat(..., dir_fd=...) and require the recorded identity.
    • fsync the affected parent directory after each successful removal.
    • Preserve operator-note.txt, pre-existing output entries, and replacement inodes.
  4. Keep _write_new_file() exclusive, no-follow, progress-checked, identity-bound, singly linked, and synchronized. Keep the canonical npm identity, registry URL, and SHA-512 SRI validation unchanged.

  5. Update .github/workflows/npm-nested-metadata-validation-quality-ci.yml to include tests/test_javascript_materializer_creation_cleanup_security.py in:

    • pull_request.paths;
    • push.paths;
    • Python 3.10 compileall;
    • focused coverage execution; and
    • focused compilation.
  6. Run the three specified regressions first. Then run the focused suite with 100% production statement and branch coverage, public-docstring validation, Python 3.10 compilation, the complete central suite, compileall, and git diff --check.

No temporary workflow, alternate writer, stacked PR, approval, merge, or Ready-state change is included.


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/oc Refetch the live head and continue only if it is f3ef0af11863255aee1ad8b875676d656ab99a68. Fix the three exact complete-suite materializer security failures directly in scripts/ci/materialize_base_javascript_packages.py, test-first: (1) preserve original CPython os.open/os.mkdir/os.stat/os.unlink/os.rmdir callable identities for capability membership and require original os.stat in os.supports_follow_symlinks; (2) create missing output ancestors component-by-component through already-open directory descriptors with O_DIRECTORY/O_NOFOLLOW, dir_fd, inode/link checks and fsync, never pathname-reopen a new descendant; (3) track every file/directory owned by a fresh project-NNN attempt and reverse-clean them on later write/fsync/validation failure while preserving operator-owned output-root entries. Preserve authenticated npm canonical-pin/blob binding, exclusive no-follow creation, Python compatibility, 100% coverage/docstrings, and no temporary writer. Run the three failing security tests, then focused 101 tests, then the full suite. Commit directly here; no new PR or repair workflow.

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/oc Refetch exact live head and abort unless it is f3ef0af11863255aee1ad8b875676d656ab99a68. Repair only scripts/ci/materialize_base_javascript_packages.py and focused tests if genuinely needed; do not change or delete the three existing RED regressions and do not create any workflow. Current run 31163640520 has 101 focused tests/100% focused coverage but the complete suite fails exactly:

  1. test_materializer_rejects_missing_follow_symlink_capability_before_mutation: _require_descriptor_relative_capabilities() must also require os.stat in os.supports_follow_symlinks before any output path mutation.
  2. test_missing_ancestor_swap_never_creates_output_through_attacker_symlink: _open_output_directory() must stop using Path.mkdir(parents=True)/pathname creation. Open the existing trusted anchor directory with O_DIRECTORY|O_NOFOLLOW, then create and open every missing descendant by basename with os.mkdir(..., dir_fd=current_fd), os.stat(..., dir_fd=current_fd, follow_symlinks=False), and os.open(..., dir_fd=current_fd) while binding device/inode identity. Never re-enter through output_dir.absolute() during creation.
  3. test_late_write_failure_rolls_back_every_owned_file_and_directory: record all materializer-owned files/directories, including intermediate relative directories and each project-NNN, and on any later failure remove them in reverse order by trusted parent descriptors/identities while preserving pre-existing operator files. _write_relative_file() must expose/record created ancestors rather than silently leave them. Roll back all prior projects and manifest on any failure, not only the current empty project directory.

Preserve no-follow descriptor-relative writes, identity checks, exact base/head lock validation, operator-data preservation and redacted fail-closed errors. Run the three failures first, then all 1025+ tests, require 100% statement/branch coverage, 100% public docstrings, compileall and clean diff. Commit normally to this existing branch only after GREEN; no force push, no placeholder replacement, no branch writer.

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Re-read the exact current head after the explicit-port doctoring correction. Confirm the final tree contains only permanent product/quality files, all nested npm metadata tests retain 100% statement/branch coverage and public docstrings, the canonical identity/version/HTTPS registry/SHA-512 boundary remains fail closed, and every direct exact-head security and supply-chain Check is successful. Submit a formal current-head verdict only; do not mutate, approve stale evidence, or merge.

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#!/bin/bash
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repo='ContextualWisdomLab/.github'
pr='807'

echo '== Live PR state =='
gh pr view "$pr" --repo "$repo" \
  --json number,state,isDraft,headRefOid,baseRefOid,mergeStateStatus,reviewDecision,url \
  --jq '{number,state,isDraft,headRefOid,baseRefOid,mergeStateStatus,reviewDecision,url}'
head="$(gh pr view "$pr" --repo "$repo" --json headRefOid --jq .headRefOid)"
base="$(gh pr view "$pr" --repo "$repo" --json baseRefOid --jq .baseRefOid)"
printf 'local_head=%s\n' "$(git rev-parse HEAD)"
printf 'head=%s\nbase=%s\n' "$head" "$base"
test "$(git rev-parse HEAD)" = "$head"

echo '== Diff scope and whitespace =='
git diff --check "$base" "$head"
git diff --name-status "$base" "$head"

echo '== Final-tree temporary artifact scan =='
fd -HI '.*(trigger|apply.*807|patch|materialize).*' .github scripts/ci docs tests 2>/dev/null || true
rg -n -i -C2 \
  'workflow_dispatch|git[[:space:]]+push|gh[[:space:]]+pr|apply_pr807|npm-nested-metadata\.trigger|materialize-npm-nested-metadata|trigger-npm-nested-metadata' \
  .github scripts/ci docs tests 2>/dev/null || true

echo '== Production maps and relevant implementations =='
ast-grep outline scripts/ci/materialize_base_javascript_packages.py --items all --view expanded
rg -n -A240 -B25 \
  'def _require_descriptor_relative_capabilities\b|def _open_output_directory\b|def _npm_package_identity\b|def _validate_npm_registry_pin\b|def validate_head_npm_lock\b|def materialize\b|def _write_relative_file\b|def _cleanup' \
  scripts/ci/materialize_base_javascript_packages.py

echo '== Relevant test definitions =='
fd -t f 'test_(npm_nested_metadata_lock_validation|javascript_materializer_.*)\.py' tests -x ast-grep outline {} --items all --view expanded

echo '== Quality workflow =='
sed -n '1,320p' .github/workflows/npm-nested-metadata-validation-quality-ci.yml

echo '== Documentation and changelog evidence =='
rg -n -A18 -B8 \
  'canonical|nested|registry|SHA-512|descriptor|openat|CWE-59|CWE-367|port' \
  docs/doctoring/npm-nested-metadata-canonical-pins.md CHANGELOG.md

echo '== Required checks on exact live head =='
gh pr checks "$pr" --repo "$repo" --required || true
gh run list --repo "$repo" --commit "$head" --limit 100 \
  --json databaseId,name,status,conclusion,headSha,event,url,createdAt,updatedAt \
  --jq '.[] | select(.headSha == "'"$head"'")'

echo '== Unresolved current review threads =='
gh api graphql -F owner='ContextualWisdomLab' -F name='.github' -F number="$pr" -f query='
query($owner: String!, $name: String!, $number: Int!) {
  repository(owner: $owner, name: $name) {
    pullRequest(number: $number) {
      reviewThreads(first: 100) {
        nodes {
          isResolved
          isOutdated
          path
          line
          comments(first: 10) {
            nodes { author { login } body commit { oid } }
          }
        }
      }
    }
  }
}' --jq '.data.repository.pullRequest.reviewThreads.nodes[] |
  select((.isResolved | not) and (.isOutdated | not)) |
  {path, line, comments: [.comments.nodes[] | {author: .author.login, commit: .commit.oid, body}]}'

Length of output: 111787


@seonghobae Current-head verdict: changes requested.

I reviewed only Draft head f3ef0af11863255aee1ad8b875676d656ab99a68.

The PR diff contains ten permanent implementation, test, documentation, changelog, and quality-workflow files. git diff --check passed. I found no unresolved current review threads.

The canonical npm validator remains fail closed. It derives the final node_modules identity, requires exact versions for metadata-only nested locations, validates complete pins independently, restricts pins to https://registry.npmjs.org/*.tgz, rejects explicit ports, userinfo, query, fragments, and validates SHA-512 SRI.

The direct current-head security and supply-chain checks shown in the evidence succeeded. This includes CodeQL, dependency review, OSV, Scorecard, Strix, Trivy, Secret Scan, Semgrep, Python Security, and SBOM.

However, the required quality result is not green. npm Nested Metadata Validation Quality CI run 31163640520 failed on this exact head. Therefore, the claimed complete-suite and 100% coverage evidence is not sufficient.

  1. P1 — Required no-follow capability is not checked before mutation

    scripts/ci/materialize_base_javascript_packages.py Line 427 checks only os.supports_dir_fd. The module calls os.stat(..., follow_symlinks=False) throughout the secure writer, but it does not require the import-time os.stat callable to be in os.supports_follow_symlinks.

    A runtime without that capability can pass preflight and create output paths before it fails. The capability gate must fail before any output mutation.

  2. P1 — Output ancestor creation still re-resolves mutable pathnames

    scripts/ci/materialize_base_javascript_packages.py Lines 464-500 calls candidate.parent.mkdir(parents=True, exist_ok=True) and candidate.mkdir(exist_ok=True) before it opens the held output descriptors.

    An attacker can replace an ancestor after validation and before either pathname operation. The materializer can then create output below an attacker-controlled symlink. Create and bind each missing component through the already-open parent descriptor. Do not reopen newly created descendants by pathname.

  3. P1 — Failed materialization does not roll back all owned output

    scripts/ci/materialize_base_javascript_packages.py Lines 759-768 only attempts to remove project-NNN after a write failure. If prior files or directories exist, the directory is nonempty and _remove_owned_empty_directory() leaves it in place.

    Record every invocation-owned file and directory. On failure, remove files and nested directories in reverse dependency order through trusted parent descriptors. Verify the recorded device and inode before each removal. Preserve pre-existing operator entries and replacement identities.

  4. P2 — The focused workflow omits a changed security contract

    .github/workflows/npm-nested-metadata-validation-quality-ci.yml does not include tests/test_javascript_materializer_creation_cleanup_security.py in its path filters, Python 3.10 compilation list, focused coverage command, or focused compilation list.

    The workflow can report focused 100% coverage while omitting the three failing creation and rollback contracts. Add this test module to each focused quality surface.

I cannot confirm an all-green current-head verdict or approve this head.

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Re-evaluate the current exact head after the documentation-only port-policy alignment. Treat the validator behavior and previous green checks as unchanged only if the head diff confirms that. Submit the verdict without branch mutation or merge.

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repo='ContextualWisdomLab/.github'
pr='807'
prior_head='f3ef0af11863255aee1ad8b875676d656ab99a68'

echo '== Current PR state =='
gh pr view "$pr" --repo "$repo" \
  --json number,url,state,isDraft,headRefName,headRefOid,baseRefOid,mergeStateStatus,reviewDecision \
  --jq '{number,url,state,isDraft,headRefName,headRefOid,baseRefOid,mergeStateStatus,reviewDecision}'

current_head="$(gh pr view "$pr" --repo "$repo" --json headRefOid --jq '.headRefOid')"
base_head="$(gh pr view "$pr" --repo "$repo" --json baseRefOid --jq '.baseRefOid')"
printf 'local_head=%s\nprior_head=%s\ncurrent_head=%s\nbase_head=%s\n' \
  "$(git rev-parse HEAD)" "$prior_head" "$current_head" "$base_head"
test "$(git rev-parse HEAD)" = "$current_head"

echo '== Commits and file delta since prior reviewed head =='
git log --oneline "${prior_head}..${current_head}"
git diff --name-status "${prior_head}" "${current_head}"
git diff --check "${prior_head}" "${current_head}"
git diff --unified=60 "${prior_head}" "${current_head}" -- \
  CHANGELOG.md docs/doctoring/npm-nested-metadata-canonical-pins.md

echo '== Current PR diff scope =='
git diff --check "${base_head}" "${current_head}"
git diff --name-status "${base_head}" "${current_head}"

echo '== Production and workflow deltas since prior reviewed head =='
git diff --name-only "${prior_head}" "${current_head}" -- \
  scripts/ci/materialize_base_javascript_packages.py \
  tests \
  .github/workflows

echo '== Exact-head checks and runs =='
gh pr checks "$pr" --repo "$repo" --required || true
gh run list --repo "$repo" --commit "$current_head" --limit 100 \
  --json databaseId,name,status,conclusion,event,url,createdAt,updatedAt \
  --jq '.[] | {databaseId,name,status,conclusion,event,url,createdAt,updatedAt}'

echo '== Temporary artifact scan in current tree =='
fd -HI '.*(trigger|apply.*807|patch|materialize).*' .github scripts/ci docs tests 2>/dev/null || true
rg -n -i -C2 \
  'workflow_dispatch|git[[:space:]]+push|gh[[:space:]]+pr|apply_pr807|npm-nested-metadata\.trigger|materialize-npm-nested-metadata|trigger-npm-nested-metadata' \
  .github scripts/ci docs tests 2>/dev/null || true

Length of output: 59554


@seonghobae Current-head verdict: changes requested.

PR #807 is still Draft at f3ef0af11863255aee1ad8b875676d656ab99a68.

The current head is identical to the prior reviewed head. There are no commits or file changes after that review. The claimed documentation-only port-policy alignment is not present in the live PR delta.

Therefore, the validator behavior is unchanged. The prior quality evidence is also unchanged.

npm Nested Metadata Validation Quality CI run 31163640520 still fails on this exact head. The other listed required security and supply-chain checks pass.

The prior blocking findings remain unresolved:

  1. _require_descriptor_relative_capabilities() does not require os.stat support in os.supports_follow_symlinks before output mutation.
  2. _open_output_directory() still creates missing ancestors through pathname-based operations.
  3. Failed materialization does not remove all invocation-owned files and directories.
  4. The focused quality workflow omits tests/test_javascript_materializer_creation_cleanup_security.py.

I cannot issue a green verdict or approve this head. No branch mutation, merge, or approval was performed.

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gh pr view "$pr" --repo "$repo" \
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  --jq '{number,url,state,isDraft,headRefOid,baseRefOid,mergeStateStatus,reviewDecision}'

head="$(gh pr view "$pr" --repo "$repo" --json headRefOid --jq '.headRefOid')"
base="$(gh pr view "$pr" --repo "$repo" --json baseRefOid --jq '.baseRefOid')"
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echo '== Current relevant source =='
ast-grep outline scripts/ci/materialize_base_javascript_packages.py \
  --items all --view expanded
rg -n -A130 -B20 \
  'def _require_descriptor_relative_capabilities\b|def _open_output_directory\b|def _write_relative_file\b|def materialize\b|def _remove_owned_empty_directory\b|supports_follow_symlinks|Path\.mkdir' \
  scripts/ci/materialize_base_javascript_packages.py

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rg -n -C3 \
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    pullRequest(number: $number) {
      reviewThreads(first: 100) {
        nodes {
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          isOutdated
          path
          line
          comments(first: 10) {
            nodes { author { login } body commit { oid } }
          }
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}' --jq '.data.repository.pullRequest.reviewThreads.nodes[] |
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Length of output: 32883


@seonghobae Formal current-head review conclusion: changes requested.

I reviewed Draft PR #807 at exact head f3ef0af11863255aee1ad8b875676d656ab99a68.

The required checks are successful. The exact-head npm Nested Metadata Validation Quality CI run 31163640520 failed. The PR remains blocked and requires review.

The following blockers remain:

  1. _require_descriptor_relative_capabilities() does not require the original os.stat callable in os.supports_follow_symlinks. The materializer can mutate output before a required follow_symlinks=False capability failure.

  2. _open_output_directory() uses candidate.parent.mkdir(parents=True, exist_ok=True) and candidate.mkdir(exist_ok=True). These pathname operations can create output after an ancestor replacement.

  3. materialize() removes only an empty failed project-NNN directory. It does not remove earlier files or nested directories that the same invocation created.

  4. .github/workflows/npm-nested-metadata-validation-quality-ci.yml omits tests/test_javascript_materializer_creation_cleanup_security.py from path filters, compilation, and focused coverage execution.

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  repository(owner: $owner, name: $name) {
    pullRequest(number: $number) {
      reviewThreads(first: 100) {
        nodes {
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          path
          line
          comments(first: 10) {
            nodes { author { login } body commit { oid } }
          }
        }
      }
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  }
}' --jq '.data.repository.pullRequest.reviewThreads.nodes[] |
  select((.isResolved | not) and (.isOutdated | not)) |
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Length of output: 7852


@seonghobae Changes requested.

PR #807 is at exact head f3ef0af11863255aee1ad8b875676d656ab99a68.

The required checks pass. However, exact-head run 31163640520, npm Nested Metadata Validation Quality CI, failed.

This failed quality check blocks approval.

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🏁 Script executed:

#!/bin/bash
set -euo pipefail

repo='ContextualWisdomLab/.github'
pr='807'

echo '== PR state =='
gh pr view "$pr" --repo "$repo" \
  --json number,state,isDraft,headRefOid,baseRefOid,mergeStateStatus,reviewDecision,url \
  --jq '{number,state,isDraft,headRefOid,baseRefOid,mergeStateStatus,reviewDecision,url}'

head="$(gh pr view "$pr" --repo "$repo" --json headRefOid --jq '.headRefOid')"

echo '== Required checks =='
gh pr checks "$pr" --repo "$repo" --required || true

echo '== Exact-head workflow runs =='
gh run list --repo "$repo" --commit "$head" --limit 100 \
  --json databaseId,name,status,conclusion,headSha,event,url,createdAt,updatedAt \
  --jq '.[] | select(.headSha == "'"$head"'") |
    {databaseId,name,status,conclusion,event,url,createdAt,updatedAt}'

echo '== Unresolved current review threads =='
gh api graphql \
  -F owner='ContextualWisdomLab' \
  -F name='.github' \
  -F number="$pr" \
  -f query='
query($owner: String!, $name: String!, $number: Int!) {
  repository(owner: $owner, name: $name) {
    pullRequest(number: $number) {
      reviewThreads(first: 100) {
        nodes {
          isResolved
          isOutdated
          path
          line
          comments(first: 10) {
            nodes { author { login } body commit { oid } }
          }
        }
      }
    }
  }
}' \
  --jq '.data.repository.pullRequest.reviewThreads.nodes[] |
    select((.isResolved | not) and (.isOutdated | not)) |
    {path, line, comments: [.comments.nodes[] |
      {author: .author.login, commit: .commit.oid, body}]}'

Length of output: 7884


@seonghobae Changes requested.

PR #807 is at exact head f3ef0af11863255aee1ad8b875676d656ab99a68.

Required checks are successful. However, exact-head workflow npm Nested Metadata Validation Quality CI run 31163640520 failed.

This failure blocks approval. No branch mutation or merge was performed.

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@opencode-agent address

Implement the remaining bounded GREEN repair on exact current Draft head f3ef0af11863255aee1ad8b875676d656ab99a68. Do not create, restore, or use any one-shot, self-modifying, encoded-patch, branch-local repair, competing branch-writer, or write-capable temporary workflow.

Exact-head evidence is narrow: focused JavaScript materializer quality is already GREEN (101 passed; scripts/ci/materialize_base_javascript_packages.py 439/439 statements and 178/178 branches), Python 3.10 compilation is GREEN, and CodeQL/Python Security/Semgrep/Security Scan/Secret Scan/OSV/Scorecard/SBOM are GREEN. Complete central run 31163640520, job 92848504463, has exactly 3 production-boundary failures (3 failed, 1022 passed):

  1. test_materializer_rejects_missing_follow_symlink_capability_before_mutation: _require_descriptor_relative_capabilities() validates supports_dir_fd but does not require os.stat in os.supports_follow_symlinks. Fail closed before any output mutation when no-follow stat capability is unavailable.
  2. test_missing_ancestor_swap_never_creates_output_through_attacker_symlink: _open_output_directory() still uses Path.mkdir(parents=True) / absolute pathname re-resolution for missing ancestors. Replace that creation path with a descriptor-relative, O_DIRECTORY | O_NOFOLLOW, mkdir(..., dir_fd=...) / open(..., dir_fd=...) walk from an already pinned ancestor; bind each created/existing component to its observed device/inode and fsync the relevant parent descriptors. Never follow a symlink or fall back to pathname-recursive creation.
  3. test_late_write_failure_rolls_back_every_owned_file_and_directory: when a later file write stalls/fails, earlier files and nested directories created in the newly owned project-NNN remain, so _remove_owned_empty_directory() cannot remove the project. Add inode-bound descriptor-relative rollback of only objects created by this materialization attempt, deepest-first, preserving all pre-existing operator files and refusing to remove a name whose device/inode no longer matches the recorded owned object. Do not use path-based recursive deletion.

Keep the existing canonical npm-pin contract unchanged. Make the permanent tests authoritative rather than weakening them. Rerun the focused suite, complete central suite, 100% production statement/branch/docstring checks, Python 3.10/3.14 compilation, clean-diff check, and every exact-head security/supply-chain gate. Keep Draft until all exact-head gates are terminal GREEN, automated review is current, zero actionable threads remain, and a qualifying independent non-author approval exists.

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Reconcile and finish the nested npm canonical-pin materializer repair on a clean current-base lease. Exact PR head is f3ef0af11863255aee1ad8b875676d656ab99a68; current protected main tip is 6eb06cdd08c79a06f7b390069d4ffa49e2eb7dba. Exact target scripts/ci/materialize_base_javascript_packages.py blob is 3ad4669143a3c6c9ad8604df2a401c7f6a63e566 on the PR head and 407c17aa100a68005ad838a6b29bfe6702333d11 on current main. Do not write if the head, protected-main tip, or relevant blob has moved.

Use a trusted checkout and normally merge exact protected main into this existing branch without rewriting history. Preserve all newer protected-main behavior and the already-green canonical nested npm metadata contract. Then fix only the three production defects proven by exact-head run 31163640520, job 92848504463 (3 failed, 1022 passed; focused 101 tests and 439/439 statements + 178/178 branches were already green):

  1. Capability preflight before mutation. Fail closed before creating or changing any output path when descriptor-relative no-follow stat support required by the publication algorithm is unavailable (including the tested os.supports_follow_symlinks absence). Do not silently fall back to pathname-following behavior.
  2. Descriptor-relative missing-ancestor creation. _open_output_directory must create/open missing components through an already trusted directory descriptor using no-follow descriptor-relative operations (mkdirat/openat semantics exposed by Python's dir_fd APIs), pinning each opened component and never re-resolving a mutable absolute path. The existing attacker swap test must prove that replacing an ancestor with a symlink cannot create generated_locks under the attacker tree.
  3. Owned-object rollback on late failure. Journal only objects created by the current attempt and, on a zero-progress or later write failure, remove every owned generated file and newly-created project-NNN directory through inode-bound descriptor-relative no-follow cleanup in reverse order, while preserving every pre-existing operator file/directory. Do not use path-based recursive deletion and do not follow symlinks during cleanup.

Keep the existing package identity rules, exact canonical root pin/version/SHA-512 checks, hostile-origin/port/query/fragment rejection, authenticated-lock immutability, regular-blob workspace manifest requirement, and all current-main coverage/security behavior unchanged. Do not force-push, use -X ours/-X theirs, weaken/skip/xfail the RED regressions, or create temporary/self-modifying/write-capable workflows.

After the resulting commit, run the creation/cleanup security regressions first, then the full focused JavaScript materializer suite with exact 100% production statement/branch/docstring coverage, complete central suite and Strix quick gate, Python 3.10/3.14 compilation, plus all exact-head Security Scan, SAST, CodeQL, Python Security, Secret Scan, OSV, Scorecard, and SBOM gates. Keep Draft until current-head automated and qualifying independent review are clean; do not merge or synthesize approval.

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