feat(review): skip auto-review of docs-only PRs via review.auto_review.skip_docs_only

[pekar9781]

Closes #2063

Summary

• Parse review.auto_review.skip_docs_only and round-trip it through reviewConfigToJson.
• Extend decideReviewEligibility and evaluateAutoReviewSkipReason with a docs-only branch using isDocsOnlyChangedPaths (empty file lists stay eligible).
• Thread changed paths through the public-surface and AI auto-review skip paths, loading stored PR files when the knob is on and paths are not yet cached.

Test plan

• npm run typecheck
• Unit tests for parser round-trip, eligibility matrix, wiring, and queue gate/regate paths

Made with Cursor

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[superagent-security]

Superagent didn't find any vulnerabilities or security issues in this PR.

[codecov]

Codecov Report

❌ Patch coverage is 95.65217% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 93.35%. Comparing base (7a6ebab) to head (b5486f2).
⚠️ Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
src/review/changed-files-classify.ts	66.66%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3691      +/-   ##
==========================================
- Coverage   93.35%   93.35%   -0.01%     
==========================================
  Files         315      315              
  Lines       32191    32204      +13     
  Branches    11809    11815       +6     
==========================================
+ Hits        30053    30065      +12     
  Misses       1507     1507              
- Partials      631      632       +1     

Files with missing lines	Coverage Δ
src/queue/processors.ts	94.08% <100.00%> (+0.01%)	⬆️
src/review/review-eligibility.ts	100.00% <100.00%> (ø)
src/signals/focus-manifest.ts	99.08% <100.00%> (-0.01%)	⬇️
src/review/changed-files-classify.ts	87.50% <66.66%> (-12.50%)	⬇️

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Caution

🟥🟥🟥🟥🟥🟥🟥🟥🟥🟥🟥🟥

🛑 Gittensory review result - reject/close recommended

_{Review updated: 2026-07-06 04:55:38 UTC}

10 files · 1 AI reviewer · 1 blocker · readiness 80/100 · CI failing · unstable

🛑 Suggested Action - Reject/Close

• No linked issue detected — If this PR is intended to solve an issue, link it explicitly in the PR body.

Review summary
This PR adds a config-driven docs-only auto-review skip: a new isDocsOnlyChangedPaths helper (fail-safe eligible on empty paths) is threaded through both the AI-review skip path (evaluateAutoReviewSkipReason) and the eligibility/visibility path (decideReviewEligibility), with lazy-loading of stored PR files only when skip_docs_only is on and paths aren't already cached. The wiring in processors.ts is careful (config-gated fetch, no unconditional extra query) and the round-trip parsing/serialization and eligibility matrix are well covered by new unit tests. One thing worth double-checking: the modified queue.test.ts regate-pr test now asserts on the `github_app.pr_visibility_skipped` audit event with detail `docs_only` instead of the previously-asserted `github_app.ai_review_auto_review_skipped` event, so confirm the AI-review-skip audit path still fires as expected for docs-only PRs and wasn't silently dropped from coverage.

Nits — 5 non-blocking

• src/review/review-eligibility.ts: the docs-only branch hardcodes matchedPattern: "docs-only" as a literal rather than an actual matched glob/pattern, overloading a field whose other use (ignored_author) holds a real matched pattern — consider a distinct field or null.
• codecov/patch is at 95.65% against a 99% target; given the two independent docs-only code paths (evaluateAutoReviewSkipReason and decideReviewEligibility), worth confirming both true/false branches of the new `skipDocsOnly === true && changedPaths.length === 0` lazy-fetch guard in processors.ts are exercised.
• test/unit/queue.test.ts:3312 switched its audit-event assertion target from `github_app.ai_review_auto_review_skipped` to `github_app.pr_visibility_skipped` — worth a one-line comment noting why, since it silently changes what the regression test guards.
• Add/confirm a test where changedPathsForEligibility is already non-empty from pr.changedFiles (no listPullRequestFiles fallback call) to lock in the 'skip redundant fetch' behavior in maybePublishPrPublicSurface (src/queue/processors.ts).
• Consider consolidating the two independent docs-only checks (evaluateAutoReviewSkipReason in focus-manifest.ts and decideReviewEligibility in review-eligibility.ts) into one call site if both are meant to always agree, to avoid future drift between the AI-review skip and the visibility/gate skip decisions.

Why this is blocked

• No linked issue detected — If this PR is intended to solve an issue, link it explicitly in the PR body.

CI checks failing

• codecov/patch — 95.65% of diff hit (target 99.00%)

Signal	Result	Evidence
Code review	❌ 1 blocker	1 reviewer
Linked issue	✅ Linked	#2063
Related work	✅ No active overlap found	No same-issue or scoped active PR overlap found.
Change scope	✅ 20/20	Low review scope from cached public metadata (1 linked issue).
Validation posture	❌ 5/25	Preflight is holding this PR: the review lane is unavailable, so it is not ready for automated review.
Contributor workload	✅ 10/10	Author activity: 1089 registered-repo PR(s), 746 merged, 41 issue(s).
Contributor context	✅ Confirmed Gittensor contributor	jony376; Gittensor profile; 1089 PR(s), 41 issue(s).
Gate result	❌ Blocking	Repo-configured hard blocker found.

Review context

• Author: jony376
• Role context: outside_contributor
• Public audience mode: oss maintainer
• Lane context: Repository registration is not available in the local Gittensory cache.
• Public profile languages: TypeScript, Python, JavaScript, Rust, MDX, Clojure, Cuda, Dart
• Official Gittensor activity: 1089 PR(s), 41 issue(s).
• PR-specific overlap: none found.

Contributor next steps

• Await review-lane availability.
• Refresh registry data or choose a registered active repo.

Signal definitions

• Related work = same linked issue, overlapping active PRs, or title/path similarity.
• Change scope = cached public metadata such as size labels, draft state, and review-burden hints.
• Validation posture = whether the PR provides enough public validation/test evidence for maintainer review.
• Contributor workload = public contributor activity and cleanup pressure, not a repo-wide quality failure.
• Contributor context = public GitHub/Gittensor identity context; non-Gittensor status is not a blocker.

_{🟩 Safe / merged · 🟦 Advisory · 🟨 Held for review · 🟥 Blocked / closed}

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[loopover-orb]

Gittensory is closing this pull request on the maintainer's behalf (CI is failing (codecov/patch); No linked issue detected). This is an automated maintenance action — to pursue this change, please open a new pull request with the issues resolved. Closed PRs may be analyzed later to improve review accuracy, but they are not automatically reopened or re-reviewed.