chore(mcp): convert lib/local-branch.js to TypeScript (Phase 2 of #7291)

[oktofeesh1]

Summary

• Converts lib/local-branch.js (592 lines) to real TypeScript (in-place .ts -> .js emit, import paths unchanged), building on Phase 1's (chore(mcp): add tsc build pipeline + convert small lib utilities to TypeScript (Phase 1 of #7291) #7328) build pipeline.
• No published-package shape change, same as Phase 1: no new .d.ts artifact, no allowlist changes needed.

Scope

• The PR title follows type(scope): short summary Conventional Commit format.
• This PR is focused and does not mix unrelated backend, UI, MCP, docs, dependency, and deploy changes.
• This follows CONTRIBUTING.md and does not reintroduce GitHub Pages, VitePress, site/, or CNAME.
• I linked a currently open issue this PR resolves.

Closes #7329

Validation

• git diff --check
• npm run actionlint
• npm run typecheck
• npm run test:coverage locally -- local-branch.ts reaches 100% lines, 163 tests total across test/unit/local-branch.test.ts, test/unit/local-scorer-adapter.test.ts, and test/unit/coding-agent-miner.test.ts. Test coverage includes defaultBaseRef's origin/HEAD -> origin/main -> origin/master precedence (via git update-ref-faked remote-tracking refs), a real git type-change status (regular file <-> symlink), MCP workspace-root path resolution, and classifyScorerExecFailure's failure-classification branches (a circular-JSON-metadata case, a SIGKILL-terminated child, a spawn/command-not-found case, and non-object-JSON stdout/stderr shapes). A handful of remaining branches are documented inline as accepted residuals: defensive fallbacks for Node error shapes this codebase's own real failure modes never produce (kept as genuine defense-in-depth, not dead code), and one line proven reachable by direct invocation outside the test runner but not attributed by the coverage tool itself -- consistent with a v8/sourcemap-remapping artifact for compiled-from-.ts files already root-caused earlier in this same migration effort.
• npm run test:workers
• npm run build:mcp
• npm run test:mcp-pack
• npm run ui:openapi:check
• npm run ui:lint
• npm run ui:typecheck
• npm run ui:build
• npm audit --audit-level=moderate
• New or changed behavior has unit/integration tests for new branches, fallback paths, and sanitizer boundaries

If any required check was skipped, explain why:

• Not skipped, but note: npm audit --audit-level=moderate reports a pre-existing high-severity adm-zip advisory (no fix available) via github-actionlint, inherited unchanged from main and unrelated to this PR's packages/loopover-mcp scope.

Safety

• No secrets, wallet details, hotkeys, coldkeys, user PATs, private keys, raw trust scores, private rankings, or private maintainer evidence are exposed.
• Public GitHub text stays sanitized, low-noise, and does not imply compensation guarantees or optimization tactics.
• Auth, cookie, CORS, GitHub App, Cloudflare, or session changes include negative-path tests. (N/A -- no such changes.)
• API/OpenAPI/MCP behavior is updated and tested where needed. (N/A -- pure internal helper refactor, no MCP tool surface changed.)
• UI changes use live API data or real empty/error/loading states, not production mock/demo fallbacks. (N/A -- no UI changes.)
• Public docs/changelogs are updated where needed; changelogs are only edited for release-prep PRs.

Notes

• No behavior change, as the issue requires: every converted function's runtime logic and exported signature is unchanged from the original hand-written .js.
• This supersedes a first attempt (PR chore(mcp): convert lib/local-branch.js to TypeScript (Phase 2 of #7291) #7417) that was auto-closed on a genuine 97.17% codecov/patch shortfall (8 lines); the coverage gaps identified there are now closed or documented as accepted residuals per the Validation section above.
• Two existing test files (local-branch.test.ts, local-scorer-adapter.test.ts) had a @ts-expect-error suppression for dynamically importing what was previously an untyped .js module; these are now stale (TypeScript resolves the import to the new .ts source directly) and were removed.

[superagent-security]

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

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 91.34%. Comparing base (fe3a344) to head (2dc251f).

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #7419      +/-   ##
==========================================
+ Coverage   91.27%   91.34%   +0.07%     
==========================================
  Files         716      716              
  Lines       72972    72990      +18     
  Branches    21528    21627      +99     
==========================================
+ Hits        66605    66674      +69     
+ Misses       5327     5272      -55     
- Partials     1040     1044       +4     

Flag	Coverage Δ
shard-1	32.63% <54.71%> (-0.01%)	⬇️
shard-2	36.11% <67.39%> (+0.04%)	⬆️
shard-3	34.52% <0.00%> (-0.02%)	⬇️
shard-4	42.88% <0.00%> (-0.02%)	⬇️
shard-5	36.97% <0.00%> (-0.02%)	⬇️
shard-6	33.55% <0.00%> (-0.02%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files with missing lines	Coverage Δ
packages/loopover-mcp/lib/local-branch.ts	100.00% <100.00%> (ø)

... and 2 files with indirect coverage changes

[loopover-orb]

Warning

⏸️ LoopOver review result - manual review recommended

_{Review updated: 2026-07-20 09:19:46 UTC}

13 files · no blockers · CI pending · blocked

⏸️ Suggested Action - Manual Review

Decision drivers

• ✅ Code review — No blockers (No AI review summary)
• ✅ Gate result — Passing (No configured blocker found.)

Context & advisory signals — never blocks the verdict

Signal	Result	Evidence
Linked issue	✅ Linked	#7329
Related work	⚠️ 3 scoped overlaps	Top overlaps are listed below; lower-confidence bulk is hidden.
Change scope	❌ 8/20	High review scope from cached public metadata (draft PR; 1 linked issue).
Validation posture	✅ 25/25	PR body includes validation/test evidence.
Contributor workload	✅ 10/10	Author activity: 81 registered-repo PR(s), 64 merged, 0 issue(s).
Contributor context	✅ Confirmed Gittensor contributor	oktofeesh1; Gittensor profile; 81 PR(s), 0 issue(s).
Improvement	✅ Minor	risk: clean · value: minor

Review context

• Author: oktofeesh1
• Role context: outside_contributor
• Public audience mode: oss maintainer
• Lane context: Repository is configured for direct PR review.
• Public profile languages: JavaScript, MDX, Python, TypeScript
• Official Gittensor activity: 81 PR(s), 0 issue(s).
• Related work: Titles/paths share 9 meaningful terms. (issue #7328)
• Related work: Titles/paths share 8 meaningful terms. (issue #7330)
• Related work: Titles/paths share 11 meaningful terms. (issue #7329, issue #7328)
• Additional title-only matches omitted; title-only overlap does not block.

Contributor next steps

• Start here: Review top overlaps.
• Then work through the remaining 3 steps in the Signals table above.

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.

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

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[JSONbored]

Issuing a warning for using draft mode, do NOT convert PRs to draft as it clogs up our pipeline and will be viewed as a review / bot evasion attempt moving forward.

ORB is still in a learning pattern with contributors that frequently convert to draft mode, so you weren't hit with a closure this time, but any future attempts may be automatically closed.