Astral released Ruff v0.16.0, significantly expanding the default rule set from 59 to 413 rules to catch more severe issues like syntax and runtime errors without configuration. This major update caused immediate CI failures for unpinned dependencies, highlighting the need for developers to review and fix hundreds of new violations in their codebases.
Background
Ruff is a high-performance Python linter written in Rust that has gained widespread adoption for its speed and comprehensive rule coverage. The v0.16.0 release marks a significant shift in default behavior, prioritizing stricter out-of-the-box safety checks over backward compatibility with older configurations.
- Source
- Simon Willison
- Published
- Jul 26, 2026 at 06:44 AM
- Score
- 7.0 / 10