feat(engine): honor candidatePaths in metadata lane-fit scoring

[kiannidev]

Summary

• Add computeMetadataLaneFit in @jsonbored/gittensory-engine: label-only lane fit by default, full path+label computeLaneFit when optional candidatePaths are present on a metadata candidate.
• Wire buildMetadataRankInput to use the new helper so discovery batches can respect wantedPaths / blockedPaths from .gittensory-miner.yml when path hints are available.
• Extend MetadataCandidateIssue with optional candidatePaths (backward compatible — absent paths keep existing label-only behavior).

Why no linked issue

Small, self-contained engine parity gap: analyze-phase ranking already uses path+label goal matching via computeLaneFit, but metadata fan-out only had labels. This closes that gap without changing miner CLI wiring or hosted review code.

Conflict avoidance

Touches only packages/gittensory-engine/**, test/unit/miner-goal-lane-fit.test.ts, and test/unit/opportunity-metadata-signals.test.ts. Does not overlap with open PRs (#3278 miner CLI, #3296 enrichment secret-scan, #3255 review guardrail, #3290 linear adapter, #3292 signals classifiers, etc.).

Codecov patch

Prior attempt (#3286) missed vitest coverage on normalizeCandidatePaths branches (non-string entries). This revision adds explicit computeMetadataLaneFit vitest cases; local diff-cover reports 100% patch coverage on the engine diff.

Test plan

• npm run build --workspace @jsonbored/gittensory-engine
• npm run build:miner
• npx vitest run test/unit/opportunity-metadata-signals.test.ts test/unit/miner-goal-lane-fit.test.ts
• diff-cover coverage/lcov.info --compare-branch=upstream/main --fail-under=99 → 100%
• CI validate / validate-code / codecov patch+project / orb review agent

Made with Cursor

[superagent-security]

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

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Warning

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⏸️ Gittensory review result - manual review recommended

_{Review updated: 2026-07-05 02:41:17 UTC}

7 files · 1 AI reviewer · no blockers · readiness 73/100 · CI green · clean

⏸️ Suggested Action - Manual Review

Review summary
The AI review returned non-blocking notes for this change but did not include a separate narrative summary. Review the nits below before deciding this PR.

Nits — 5 non-blocking

• nit: `packages/gittensory-engine/src/miner-goal-lane-fit.ts:65` still passes `candidateLabels: [...issue.labels]` directly to `computeLaneFit`; if `computeLaneFit` is less tolerant than `computeMinerGoalLaneFit`, consider reusing the same label normalization before crossing into the path-aware scorer.
• nit: `packages/gittensory-engine/test/miner-goal-lane-fit.test.ts:4` is now a long import line; split it to match the formatting already used in the Vitest coverage file.
• At `packages/gittensory-engine/src/miner-goal-lane-fit.ts:65`, either normalize labels before calling `computeLaneFit` or add a path-present test with malformed labels so this new branch has the same malformed-input contract as label-only scoring.
• At `test/unit/opportunity-metadata-signals.test.ts:73`, add one integration assertion for `candidatePaths: []` or blank-only paths with repo `wantedPaths` configured, so the `buildMetadataRankInput` fallback contract is covered at the wiring layer too.
• Readiness score is below the configured threshold — Use the readiness panel as advisory maintainer context; the score does not block this PR.

Signal	Result	Evidence
Code review	✅ No blockers	1 reviewer
Linked issue	⚠️ Missing	No linked issue or no-issue rationale found.
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 (no linked issue context).
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: 1313 registered-repo PR(s), 629 merged, 49 issue(s).
Contributor context	✅ Confirmed Gittensor contributor	kiannidev; Gittensor profile; 1313 PR(s), 49 issue(s).
Gate result	✅ Passing	No configured blocker found.

Review context

• Author: kiannidev
• Role context: outside_contributor
• Public audience mode: oss maintainer
• Lane context: Repository registration is not available in the local Gittensory cache.
• Public profile languages: not available
• Official Gittensor activity: 1313 PR(s), 49 issue(s).
• PR-specific overlap: none found.

Contributor next steps

• Explain no-issue PR.
• Await review-lane availability.
• Refresh registry data or choose a registered active repo.
• Link the issue being solved, or explicitly explain why this is a no-issue PR.

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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• Re-run Gittensory review

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 94.25%. Comparing base (c6813b5) to head (4377c4c).
⚠️ Report is 4 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3298      +/-   ##
==========================================
+ Coverage   94.14%   94.25%   +0.11%     
==========================================
  Files         276      276              
  Lines       30246    30257      +11     
  Branches    11021    11025       +4     
==========================================
+ Hits        28474    28519      +45     
+ Misses       1127     1081      -46     
- Partials      645      657      +12     

Files with missing lines	Coverage Δ
...kages/gittensory-engine/src/miner-goal-lane-fit.ts	90.90% <100.00%> (+4.54%)	⬆️
...ages/gittensory-engine/src/opportunity-metadata.ts	100.00% <ø> (ø)

... and 1 file with indirect coverage changes

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Gittensory approves — the gate is satisfied and CI is green.