Pyrefly (`pyrefly lsp`) joins basedpyright, Pyright and ty as a fallback Python language server. It is installable from Tools as a managed virtualenv tool and is listed among the interchangeable type checkers, before Ruff, so Ruff still runs after them.
Pyrefly only reports type errors in projects with a Pyrefly configuration (`pyrefly.toml` or `[tool.pyrefly]`); hover, completion and navigation work without one. A real-server test (ignored by default, needs `pyrefly` on PATH) covers startup, go-to-definition and diagnostics.
Co-authored-by: pcastro93 <[email protected]>
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