fix(engine): weight local-scorer totalTokenScore with TEST_FILE_CONTRIBUTION_WEIGHT

[andriypolanski]

Summary

• Closes fix(engine): local-scorer's totalTokenScore bypasses the TEST_FILE_CONTRIBUTION_WEIGHT discount when fed back into the score preview #8875
• computeLocalScorerTokens now derives totalTokenScore with TEST_FILE_CONTRIBUTION_WEIGHT (same formula as preview.ts's derivedTotalTokenScore) instead of a raw unweighted line sum.
• Adds a test-heavy regression asserting the weighted local-scorer total matches buildScorePreview when the explicit total is fed back vs when preview derives it from components.
• Updates MCP local-scorer tool tests (mcp-cli-plan-scorer-tools, mcp-run-local-scorer) that previously expected the old raw sum — the gap that closed fix(engine): weight local-scorer totalTokenScore with TEST_FILE_CONTRIBUTION_WEIGHT #8970/fix(engine): weight local-scorer totalTokenScore with TEST_FILE_CONTRIBUTION_WEIGHT #8977.

Scope

• The PR title follows type(scope): short summary Conventional Commit format, for example fix(api): restore profile access checks.
• 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 (e.g. Closes #123) — a linked open issue is required for every contributor PR.

Validation

• git diff --check
• npx vitest run test/unit/local-scorer.test.ts — 7 passed
• npm run test --workspace @loopover/engine -- test/local-scorer.test.ts — passed
• npx vitest run test/unit/mcp-cli-plan-scorer-tools.test.ts -t "loopover_run_local_scorer computes" — passed
• CI-scoped Codecov simulation — 100% patch lines (4/4) on packages/loopover-engine/src/local-scorer.ts
• npm run typecheck
• npm run actionlint
• npm run test:coverage
• 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:

Narrow engine scoring alignment fix; full test:ci left for CI. Targeted local-scorer + MCP tool tests cover the weighted total and preview agreement path.

Notes for reviewers / gate

• No secrets, wallets, hotkeys, trust scores, or reward values.
• Does not touch site/, CNAME, **/lovable/**, or CHANGELOG.md.
• No UI Evidence (backend-only).

Made with Cursor

[superagent-security]

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

[loopover-orb]

This repository reviews pull requests one-shot: the PR must be correct as originally opened. Pushing an additional commit closes it automatically instead of restarting review — open a fresh pull request with every fix included.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
⚠️ Please upload report for BASE (main@7e52ae4). Learn more about missing BASE report.
⚠️ Report is 6 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #9072   +/-   ##
=======================================
  Coverage        ?   95.17%           
=======================================
  Files           ?      714           
  Lines           ?    58095           
  Branches        ?    20563           
=======================================
  Hits            ?    55293           
  Misses          ?     1615           
  Partials        ?     1187           

Flag	Coverage Δ
backend	95.17% <100.00%> (?)

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

Files with missing lines	Coverage Δ
packages/loopover-engine/src/local-scorer.ts	100.00% <100.00%> (ø)