Pyrefly 0.22.0

Status : ALPHA

Release date: 30 Jun 2025

Pyrefly 0.22.0 bundles 216 commits from 23 contributors. This release includes significant improvements in type checking and performance enhancements.

✨ New & Improved

Area	What’s new
Type Checking	Implemented support for `functools.total_ordering`, allowing automatic generation of rich comparison methods.
IDE / LSP	Added support for `textDocument/rename` and `textDocument/prepareRename` in LSP.
Configuration	Introduced CLI flag for `--conda-environment` to manage Python environments more effectively.

🐛 Other bug fixes

Fixed bugs in attribute narrowing and method overrides.
Resolved issues with NamedTuple field ordering and TypedDict method synthesis.
Values with type[tuple] can now be used as a tuple constructor
Enums can now be subscripted with any str, not just literals.

📦 Upgrade

pip install --upgrade pyrefly==0.22.0

🖊️ Contributors this release

@Adist319, @adsi7698, @bigfootjon, @connernilsen, @CookieComputing, @dluo, @facebook-github-bot, @fangyi-zhou, @grievejia, @iwakitakuma33, @kinto0, @krathul, @melvinhe, @migeed-z, @ndmitchell, @pt2302, @rchen152, @SamChou19815, @stroxler, @vagabond-0, @xaskii, @yangdanny97, @zsol

Previous Release Notes

https://github.com/facebook/pyrefly/releases

Full Changelog: 0.21.0...0.22.0

facebook/pyrefly 0.22.0 v0.22.0 on GitHub