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Ruff

Python linter+formatter, 100x faster

provisional — pending verificationMITself-hostable

Arete score

4.8 / 5

Autonomy5

Return5

Efficiency5

Transparency4

ἀρετή “AH-reh-tay” — excellence: a thing being good at what it’s for. Mean of the four principle scores. How we score →

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~ Provisional — seeded estimate by a human researcher; full rubric pass pending.

Why it's listed

Ruff is listed in build tools & runtimes because it competes on utility: python linter+formatter, 100x faster. It's VC-backed — we note this openly and watch the monetization path; the license and self-host route are the safeguards. Licensed MIT; pricing: free. Technically it's lean — it runs comfortably on modest hardware, which is exactly the proof-of-work efficiency we rank for. This entry is provisional — the scores are seeded estimates pending our full manual rubric pass, and the verification date will appear here once complete.

Facts

License: MIT
Pricing: Free
Funding model: VC-backed OSS (Astral)
Self-hostable: Yes
Replaces: flake8, black
Verification: Provisional — scores are seeded estimates pending manual verification

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Spotted a problem — trackers added, dark patterns, abandonment? Report a violation. Scores change when evidence does.