pyrefly ☆
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Description:
Fast type checker and IDE for Python
Type: Formula  |  Latest Version: 0.46.0@0  |  Tracked Since: Dec 11, 2025
Links: Homepage  |  formulae.brew.sh
Category: Developer tools
Tags: python type-checker linter rust ide developer-tools
Install: brew install pyrefly
About:
Pyrefly is a high-performance type checker and language server for Python, built in Rust for speed and accuracy. It provides rapid feedback directly in the IDE, helping developers catch type errors early and improve code quality. The tool aims to offer a faster alternative to existing solutions while maintaining compatibility with standard Python typing.
Key Features:
  • Rust-based performance for fast type checking
  • IDE integration for real-time feedback
  • Compatibility with Python type hints
  • Incremental checking for large codebases
Use Cases:
  • Continuous type checking during development
  • Refactoring legacy Python codebases safely
  • Enforcing type safety in CI/CD pipelines
Alternatives:
  • mypy – The standard Python type checker; Pyrefly focuses on speed and IDE integration.
  • pyright – Microsoft's type checker; Pyrefly offers a Rust-based alternative with similar goals.
Version History
Detected Version Rev Change Commit
Dec 23, 2025 11:15pm 0.46.0 0 VERSION_BUMP f79009f5
Dec 11, 2025 2:48am 0 VERSION_BUMP bc15302d
Dec 9, 2025 8:18pm 0 VERSION_BUMP 449bc7e9
Dec 8, 2025 2:18pm 0 VERSION_BUMP a423106a
Dec 5, 2025 8:55pm 0 VERSION_BUMP 9ead9c2e
Dec 4, 2025 2:52am 0 VERSION_BUMP 94d3bc96
Dec 2, 2025 11:25pm 0 VERSION_BUMP 032a863d
Nov 24, 2025 5:31pm 0 VERSION_BUMP da12dd71
Nov 18, 2025 8:20am 0 VERSION_BUMP d54da6ad
Nov 17, 2025 8:55pm 0 VERSION_BUMP b9ae7d2f
Nov 14, 2025 7:33am 0 VERSION_BUMP 21f42923
Nov 12, 2025 8:12pm 0 VERSION_BUMP 9a965b4f
Nov 12, 2025 2:20am 0 VERSION_BUMP 3242844b
Nov 7, 2025 8:54pm 0 VERSION_BUMP 1a394b38
Nov 3, 2025 5:57pm 0 VERSION_BUMP e24fc35b
Oct 30, 2025 5:17pm 0 VERSION_BUMP 8e6b0d7c
Oct 29, 2025 2:47am 0 VERSION_BUMP a0581075
Oct 27, 2025 8:49pm 0 VERSION_BUMP daf265a5
Oct 22, 2025 5:25am 0 VERSION_BUMP a924284f
Oct 21, 2025 2:44am 0 VERSION_BUMP 0a5cb2d1
Oct 20, 2025 5:20pm 0 VERSION_BUMP 1c310c42
Oct 8, 2025 8:17pm 0 VERSION_BUMP 1e74ef0c
Oct 7, 2025 2:39am 0 VERSION_BUMP a0455e4f
Sep 22, 2025 8:52pm 0 VERSION_BUMP 0d5f43b6
Sep 22, 2025 8:22pm 0 VERSION_BUMP 402b6b3b
Sep 15, 2025 8:37pm 0 VERSION_BUMP d27c1fd7
Sep 15, 2025 5:24pm 0 VERSION_BUMP 326a86bc
Sep 14, 2025 7:03am 0 VERSION_BUMP b552278b
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