Ty Python Type Checker

---
name: "ty Ultra-Fast Python Type Checker and Language Server"
slug: "ty-python-type-checker"
description: "ty is an extremely fast Python type checker and language server written in Rust by Astral, the creators of Ruff and uv. It delivers 10-100x faster type checking than mypy or Pyright with comprehensive diagnostics, incremental analysis, and first-class editor integrations."
github_stars: 18132
verification: "security_reviewed"
source: "https://github.com/astral-sh/ty"
category: "Code Quality & Review"
framework: "Claude Code"
tool_ecosystem:
  github_repo: "astral-sh/ty"
  github_stars: 18132
---

# ty Ultra-Fast Python Type Checker and Language Server

ty is an extremely fast Python type checker and language server written in Rust by Astral, the creators of Ruff and uv. It delivers 10-100x faster type checking than mypy or Pyright with comprehensive diagnostics, incremental analysis, and first-class editor integrations.

## Installation

Requirements and caveats from upstream:
- [![PyPI](https://img.shields.io/pypi/v/ty.svg)](https://pypi.python.org/pypi/ty)
- An extremely fast Python type checker and language server, written in Rust.

Basic usage or getting-started notes:
- Run ty with [uvx](https://docs.astral.sh/uv/guides/tools/#running-tools) to get started quickly:
- shell
- uvx ty check

- Source: https://github.com/astral-sh/ty
- Extracted from upstream docs: https://raw.githubusercontent.com/astral-sh/ty/HEAD/README.md

## Source

- [Agent Skill Exchange](https://agentskillexchange.com/skills/ty-python-type-checker/)