# facebook/pyrefly

> A fast type checker and language server for Python with IDE features: code navigation, autocomplete, semantic highlighting. Available as a CLI and extension for VSCode, Neovim, Zed.

- Magnitude: 0.9 out of 10 — Steady
- Stars: 7,003 total · +1 star on 2026-09-23 (UTC), ≈ 3 by evening
- Star trust: star growth looks organic
- Category: Developer tools · Language: Rust · License: MIT · Created: 2025-02-19 · Last push: 2026-09-23
- GitHub: https://github.com/facebook/pyrefly · Homepage: http://pyrefly.org/ · Page: https://gitnova.dev/en/r/facebook/pyrefly

## Useful for

- Type-check a Python project via CLI instead of Mypy or Pyright
- Set up autocomplete and code navigation in VSCode or Neovim
- Migrate an existing project from Mypy using pyrefly init and suppress

## Why it’s here

- 1 star so far today, about 3 expected by the end of the day.

## Star trust

Star growth looks organic.

Star-trust labels are heuristics based on the repository’s behavior, not a check of every stargazer.

## Numbers

- Forks: 519
- Issues and pull requests: 4,954
- Watchers: 23
- Average over the last week: 5 per day
- Usual pace: 4 per day
- Latest release: 1.4.0-dev.1 (2026-09-19)

## Stars per day, last 30 days (oldest → newest, today is partial)

2026-09-30 … 2026-10-29: None, None, None, None, None, None, None, None, None, None, None, None, None, None, None, None, None, None, None, None, None, None, None, None, None, None, None, None, None, None

## Magnitude by day, last 11 days

09-13 1.0, 09-14 0.8, 09-15 1.0, 09-16 1.2, 09-17 1.3, 09-18 1.0, 09-19 1.4, 09-20 1.2, 09-21 1.2, 09-22 1.1, 09-23 0.9

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Magnitude (0–10) measures how fast and how unusually interest in a repository is growing right now. It is not a quality score.
Days are UTC. “So far today” is a fact; “expected by the end of the day” is a forecast.
Summaries and use cases are written by an LLM (DeepSeek V4.1 Flash) from the README and may be inaccurate: verify specific claims (benchmarks, speed, hardware) in the repository itself.
Data as of 2026-09-23 10:35 UTC, updated every 30 minutes.