[MendixMau]

On ab-581/gk, doctor --bench printed the verdict "5x slower than the reference, mainly git status", then "Recommended fix: None needed". The cause: the fix logic only looked at process-start cost.

What changes

1. A slow step gets named. When process starts are fast but the slowest step is 5x+ the reference and 2 s+ over it, the Recommended fix names that step.
   • For a slow git status, it gives git config core.untrackedCache true, plus core.fsmonitor true on Windows and macOS. Neither needs admin rights.
   • Any other step gets "run --bench again; if it stays slow, send the results".
2. Sync folders. A project inside OneDrive, Dropbox, Google Drive or iCloud gets a Machine health warning, and its fix is "move the project to a local folder". OneDrive holds Documents and Desktop by default on Windows.
3. Low memory. The advice now offers "restart the computer" first, with --cleanup as the alternative.
4. Bench git step. One untimed git status runs first, so a stale index after a copy or clone isn't timed. Field numbers: 18.3 s cold, 31 ms warm.
5. skills/speed-setup.md. Claude never says deno, mxbuild or "helper process" to a user. The skill gives a wrong/right example and two new fix options.

Evidence

• Field runs:
  • ab-581/gk: bench 14.7 s vs 10.9 s; "None needed" is correct there.
  • A project under a OneDrive/ path shows the warning and the move advice.
• test-doctor-bench: 64/0. New cases 7–9 cover a slow git (via a fake git), a OneDrive path and the restart advice.
• Other doctor fixtures:
  • docker-probe 18/0
  • gate-selftest 42/0
• Checks: check-scripts, check-portability, leak guard and check-pr-discipline are all clean.

Risk

• Bench and recommended-fix only. Doctor's exit code doesn't change: the sync-folder line uses advise.
• Word budget unaffected. skills/speed-setup.md is loaded on demand, so this adds no baseline words.
• Not run on Windows:
  • core.fsmonitor needs Git 2.37+.
  • The path match is a plain substring match.

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