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facebook/pyrefly

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1
winnable issues
5%
merge velocity signal
6,830
245 contributors

What it is

A fast type checker and language server for Python

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Support go-to-definition for functional TypedDicts

facebook/pyrefly · issue #4360 · opened Jul 2026 · no PRs referenced when indexed

help wantedlanguage-server

ref https://github.com/astral-sh/ty/issues/1322

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Why we picked it

Winnable volume0.13
Merge velocity0.05
Freshness1.00
Skill coverage0.00
Popularity0.68