Ruff

Health v2 · maintenance only

Adoption not part of the score

49343 stars · 2363 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-29, confidence not recorded

Ruff is an extremely fast Python linter and code formatter written in Rust, offering over 900 built-in rules and drop-in parity with tools like Flake8, Black, isort, and pyupgrade. It ships as a CLI with built-in caching, auto-fix support, a Language Server for editor integration, and pre-commit/CI integrations.

Use cases

• lint python code for style and errors
• format python code like black
• replace flake8 with a faster linter
• sort and organize python imports
• auto-fix unused imports and lint violations
• enforce code style in CI pipelines
• lint python in vscode in real time
• set up pre-commit hooks for python linting

When to choose

• you need a fast, single-tool replacement for flake8, black, isort, and pyupgrade
• you want linting and formatting with auto-fix in one tool
• you work on large codebases or monorepos where lint speed matters
• you want editor diagnostics via LSP or VS Code extension

When to avoid

• you rely on flake8 plugins not yet reimplemented in ruff
• you need linting for languages other than python
• you require exact byte-for-byte black output on non-black-formatted code

Facets

cli-tool · maturity stable

linter formatter static-site-generator developer-tools developer-tools testing python rust windows cli editor-plugin flake8-replacement black-replacement isort pyupgrade pep8 code-style language-server-protocol vscode-extension pre-commit ci-cd python command-line linux macos docker

Member repositories

For agents

markdown · JSON · MCP: product_card(name="astral-sh/ruff")