pyrefly

Use it when

• type-check a large Python codebase with a fast CLI
• add editor diagnostics and a CI type gate without adopting mypy

What it solves

Not the fit when

• replaces runtime tests

Install

uv tool install pyrefly

Invoke

Run `pyrefly check` at the Python project root; configure include and exclude paths before enabling the language server or CI gate.

Alternatives

No reviewed alternatives recorded yet.