ClaimArticle

Given Astral's new home at OpenAI, Ruff's output format provides everything a coding agent would need to fix the problems.

The author notes that Ruff's error output is well-suited for AI coding agents, which he tested with Codex and Claude Code. ✦ AI generated

Simon Willison · Simon Willison's Weblog · 2026-07-25 · original ↗

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Unsurprisingly, given Astral's new home at OpenAI, this output provides everything a coding agent would need to fix the problems. I had Codex (GPT-5.6 Sol high) upgrade LLM and sqlite-utils, and Claude Code (with Opus 5) upgrade Datasette.

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▦ Astral ▦ OpenAI ✳ Claude Code ✳ Codex

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Evidence · 1

Ruff v0.16.0 now enables 413 rules by default, up from 59 in previous versions, dramatically increasing its default linting coverage.Brent Westbrook · Simon Willison's Weblog · conf 60%