fix(signals): classify .mts and .cts source maps as generated

[jimcody1995]

Summary

• Extend isGeneratedFile in path-matchers.ts to treat .mts.map and .cts.map as generated output, matching the existing .mjs.map/.cjs.map/.ts.map handling.
• TypeScript module bundlers emit these source-map siblings; without this, slop classifyChangedFile miscounted them as substantive source effort.

Scope

• Conventional Commit title format.
• Focused change — path-matchers + unit tests only.
• Follows CONTRIBUTING.md.
• No linked issue needed (small classifier parity fix).

Validation

• git diff --check
• npm run test:ci on Node 22 (actionlint, typecheck, test:coverage, workers, MCP, UI)
• npm audit --audit-level=moderate — 0 vulnerabilities
• Unit tests cover .mts.map and .cts.map in isGeneratedFile

Safety

• No secrets, auth, or UI changes.
• N/A for UI Evidence.

UI Evidence

N/A — backend path classifier only.

Notes

Conflict avoidance: Touches only src/signals/path-matchers.ts and test/unit/path-matchers.test.ts. Zero overlap with open PRs (#3316 dart classifiers, #3304 review holds, #3344/#3343/#3339 enrichment, #3340 engine, #3314 miner, #3305 enrichment-wire, #3281 grafana, #3255 queue). Should merge cleanly after any of those land without rebase.

Made with Cursor

[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 93.88%. Comparing base (38a1bac) to head (38c6ce2).
⚠️ Report is 5 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #3347   +/-   ##
=======================================
  Coverage   93.88%   93.88%           
=======================================
  Files         280      280           
  Lines       30552    30552           
  Branches    11130    11130           
=======================================
  Hits        28684    28684           
  Misses       1211     1211           
  Partials      657      657           

Files with missing lines	Coverage Δ
src/signals/path-matchers.ts	88.46% <ø> (ø)

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Warning

🟨🟨🟨🟨🟨🟨🟨🟨🟨🟨🟨🟨

⏸️ Gittensory review result - manual review recommended

_{Review updated: 2026-07-05 04:37:06 UTC}

2 files · 1 AI reviewer · no blockers · readiness 80/100 · CI green · clean

⏸️ Suggested Action - Manual Review

Review summary
This is a focused classifier parity fix: `isGeneratedFileFrom` now treats `.mts.map` and `.cts.map` as generated source maps alongside the existing JS/TS bundle map extensions. The production path is direct because `classifyChangedFile` calls `isGeneratedFileFrom` before `isCodeFile`, so these files now land in `generated` instead of being miscounted as source/other. The added tests exercise the matcher itself, and the regex remains path-normalized and end-anchored enough for this case.

Nits — 3 non-blocking

• nit: `test/unit/path-matchers.test.ts:43` only asserts `isGeneratedFile`, so the slop-facing regression path through `classifyChangedFile` is not directly covered even though that is the behavior named in the PR description.
• Add `dist/loader.mts.map` and `dist/setup.cts.map` to the `classifyChangedFile` representative cases in `test/unit/path-matchers.test.ts` with expected category `generated`, so the test pins the actual caller path that prevents source-effort miscounting.
• Code changes lack test evidence — Add focused regression tests or explain why existing coverage is sufficient.

Signal	Result	Evidence
Code review	✅ No blockers	1 reviewer
Linked issue	✅ No-issue rationale	PR body explains why no issue is linked.
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: 46 registered-repo PR(s), 23 merged, 0 issue(s).
Contributor context	✅ Confirmed Gittensor contributor	jimcody1995; Gittensor profile; 46 PR(s), 0 issue(s).
Gate result	✅ Passing	No configured blocker found.

Review context

• Author: jimcody1995
• 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: 46 PR(s), 0 issue(s).
• PR-specific overlap: none found.

Contributor next steps

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