prek prek

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[pre-commit](https://pre-commit.com/) is a framework to run hooks written in many languages, and it manages the language toolchain and dependencies for running the hooks. *prek* is a reimagined version of pre-commit, built in Rust. It is designed to be a faster, dependency-free and drop-in alternative for it, while also providing some additional long-requested features. > [!NOTE] > Although prek is pretty new, it’s already powering real‑world projects like [CPython](https://github.com/python/cpython), [Apache Airflow](https://github.com/apache/airflow), [FastAPI](https://github.com/fastapi/fastapi), and more projects are picking it up—see [Who is using prek?](#who-is-using-prek). If you’re looking for an alternative to `pre-commit`, please give it a try—we’d love your feedback! > > Please note that some languages are not yet supported for full drop‑in parity with `pre-commit`. See [Language Support](https://prek.j178.dev/languages/) for current status. ## Features - A single binary with no dependencies, does not require Python or any other runtime. - [Faster](https://prek.j178.dev/benchmark/) than `pre-commit` and more efficient in disk space usage. - Fully compatible with the original pre-commit configurations and hooks. - Built-in support for monorepos (i.e. [workspace mode](https://prek.j178.dev/workspace/)). - Integration with [`uv`](https://github.com/astral-sh/uv) for managing Python virtual environments and dependencies. - Improved toolchain installations for Python, Node.js, Bun, Go, Rust and Ruby, shared between hooks. - [Built-in](https://prek.j178.dev/builtin/) Rust-native implementation of some common hooks. ## Table of contents - [Installation](#installation) - [Quick start](#quick-start) - [Why prek?](#why-prek) - [Who is using prek?](#who-is-using-prek) - [Acknowledgements](#acknowledgements) ## Installation
Standalone installer prek provides a standalone installer script to download and install the tool, On Linux and macOS: ```bash curl --proto '=https' --tlsv1.2 -LsSf https://github.com/j178/prek/releases/download/v0.3.10/prek-installer.sh | sh ``` On Windows: ```powershell powershell -ExecutionPolicy ByPass -c "irm https://github.com/j178/prek/releases/download/v0.3.10/prek-installer.ps1 | iex" ```
PyPI prek is published as Python binary wheel to PyPI, you can install it using `pip`, `uv` (recommended), or `pipx`: ```bash # Using uv (recommended) uv tool install prek # Using uvx (install and run in one command) uvx prek # Adding prek to the project dev-dependencies uv add --dev prek # Using pip pip install prek # Using pipx pipx install prek ```
Homebrew ```bash brew install prek ```
mise To use prek with [mise](https://mise.jdx.dev) ([v2025.8.11](https://github.com/jdx/mise/releases/tag/v2025.8.11) or later): ```bash mise use prek ```
Cargo binstall Install pre-compiled binaries from GitHub using [cargo-binstall](https://github.com/cargo-bins/cargo-binstall): ```bash cargo binstall prek ```
Cargo Build from source using Cargo (Rust 1.89+ is required): ```bash cargo install --locked prek ```
npmjs prek is published as a [Node.js package](https://www.npmjs.com/package/@j178/prek) and can be installed with any npm-compatible package manager: ```bash # As a dev dependency npm add -D @j178/prek pnpm add -D @j178/prek bun add -D @j178/prek # Or install globally npm install -g @j178/prek pnpm add -g @j178/prek bun install -g @j178/prek # Or run directly without installing npx @j178/prek --version bunx @j178/prek --version ```
Nix prek is available via [Nixpkgs](https://search.nixos.org/packages?channel=unstable&show=prek&query=prek). ```shell # Choose what's appropriate for your use case. # One-off in a shell: nix-shell -p prek # NixOS or non-NixOS without flakes: nix-env -iA nixos.prek # Non-NixOS with flakes: nix profile install nixpkgs#prek ```
Conda prek is available as `prek` via [conda-forge](https://anaconda.org/conda-forge/prek). ```shell conda install conda-forge::prek ```
Scoop (Windows) prek is available via [Scoop](https://scoop.sh/#/apps?q=prek). ```powershell scoop install main/prek ```
Winget (Windows) prek is available via [winget](https://learn.microsoft.com/en-us/windows/package-manager/winget/). ```powershell winget install --id j178.Prek ```
MacPorts prek is available via [MacPorts](https://ports.macports.org/port/prek/). ```bash sudo port install prek ```
GitHub Releases Pre-built binaries are available for download from the [GitHub releases](https://github.com/j178/prek/releases) page.
GitHub Actions prek can be used in GitHub Actions via the [j178/prek-action](https://github.com/j178/prek-action) repository. Example workflow: ```yaml name: Prek checks on: [push, pull_request] jobs: prek: runs-on: ubuntu-latest steps: - uses: actions/checkout@v6 - uses: j178/prek-action@v2 ``` This action installs prek and runs `prek run --all-files` on your repository. prek is also available via [`taiki-e/install-action`](https://github.com/taiki-e/install-action) for installing various tools.
prek skill for agents To let agents use `prek`, install the `prek` skill with `gh skill` (`v2.90.0+`): ```bash gh skill install j178/prek prek ```
If installed via the standalone installer, prek can update itself to the latest version: ```bash prek self update ``` ## Quick start - **I already use pre-commit:** follow the short migration checklist in the [quickstart guide](https://prek.j178.dev/quickstart/#already-using-pre-commit) to swap in `prek` safely. - **I'm new to pre-commit-style tools:** learn the basics—creating a config, running hooks, and installing Git shims—in the [beginner quickstart walkthrough](https://prek.j178.dev/quickstart/#new-to-pre-commit-style-workflows). ## Why prek? ### prek is faster - It is [multiple times faster](https://prek.j178.dev/benchmark/) than `pre-commit` while also using less disk space. - Hook environments and toolchains are shared across hooks instead of being duplicated per repository, which reduces both install time and cache size. - Repositories are fetched in parallel, hook environments are prepared in parallel when their dependencies do not overlap, and hooks can run concurrently by [`priority`](https://prek.j178.dev/configuration/#priority). - It uses [`uv`](https://github.com/astral-sh/uv) for creating Python virtualenvs and installing dependencies, which is known for its speed and efficiency. - It implements some common hooks in Rust as [builtins](https://prek.j178.dev/builtin/), which are faster than their Python counterparts. - It supports `repo: builtin` for offline, zero-setup hooks, which is not available in `pre-commit`. ### prek is easier to work with - No need to install Python or any other runtime just to use `prek`; it is a single binary. - `prek` automatically installs the toolchains it needs for supported languages, so you spend less time managing Python versions, Node runtimes, Ruby installs, and similar setup. - It supports native [`prek.toml`](https://prek.j178.dev/configuration/) in addition to pre-commit YAML, and [`prek util yaml-to-toml`](https://prek.j178.dev/cli/#prek-util-yaml-to-toml) helps migrate existing configs. - Built-in support for [workspaces](https://prek.j178.dev/workspace/) means monorepos can keep separate configs per project and still run everything from one command. - [`prek install`](https://prek.j178.dev/cli/#prek-install) and [`prek uninstall`](https://prek.j178.dev/cli/#prek-uninstall) honor repo-local and worktree-local `core.hooksPath`. - [`prek run`](https://prek.j178.dev/cli/#prek-run) supports selecting or skipping multiple projects or hooks in workspace mode, instead of only accepting a single optional hook id, and adds quality-of-life improvements such as `--dry-run`, `--directory`, `--last-commit`, and `--no-fail-fast`. - [`prek list`](https://prek.j178.dev/cli/#prek-list), [`prek util identify`](https://prek.j178.dev/cli/#prek-util-identify), and [`prek util list-builtins`](https://prek.j178.dev/cli/#prek-util-list-builtins) make it easier to inspect configured hooks, debug file matching, and discover builtins. ### prek includes security-focused safeguards - [`prek auto-update`](https://prek.j178.dev/cli/#prek-auto-update) supports `--cooldown-days`, so you can keep newly published releases on hold for a cooling-off period before adopting them. - [`prek auto-update`](https://prek.j178.dev/cli/#prek-auto-update) validates pinned SHA revisions against the fetched upstream refs, including impostor-commit detection, and keeps `# frozen:` comments in sync with the configured commit. - [`prek auto-update --check`](https://prek.j178.dev/cli/#prek-auto-update--check) is useful in CI when you want updates or frozen-reference mismatches to fail the job without rewriting the config. For more detailed improvements prek offers, take a look at [Difference from pre-commit](https://prek.j178.dev/diff/). ## Who is using prek? prek is pretty new, but it is already being used or recommended by some projects and organizations. GitHub stars are current as of April 15, 2026. - [apache/airflow](https://github.com/apache/airflow/issues/44995) 45,050 stars - [python/cpython](https://github.com/python/cpython/issues/143148) 72,330 stars - [pdm-project/pdm](https://github.com/pdm-project/pdm/pull/3593) 8,553 stars - [fastapi/fastapi](https://github.com/fastapi/fastapi/pull/14572) 97,209 stars - [fastapi/typer](https://github.com/fastapi/typer/pull/1453) 19,210 stars - [fastapi/asyncer](https://github.com/fastapi/asyncer/pull/437) 2,407 stars - [astral-sh/ruff](https://github.com/astral-sh/ruff/pull/22505) 47,070 stars - [astral-sh/ty](https://github.com/astral-sh/ty/pull/2469) 18,308 stars - [openclaw/openclaw](https://github.com/openclaw/openclaw/pull/1720) 357,512 stars - [home-assistant/core](https://github.com/home-assistant/core/pull/160427) 86,029 stars - [python-telegram-bot/python-telegram-bot](https://github.com/python-telegram-bot/python-telegram-bot/pull/5142) 29,025 stars - [DetachHead/basedpyright](https://github.com/DetachHead/basedpyright/pull/1413) 3,267 stars - [OpenLineage/OpenLineage](https://github.com/OpenLineage/OpenLineage/pull/3965) 2,406 stars - [authlib/authlib](https://github.com/authlib/authlib/pull/804) 5,271 stars - [django/djangoproject.com](https://github.com/django/djangoproject.com/pull/2252) 1,994 stars - [Future-House/paper-qa](https://github.com/Future-House/paper-qa/pull/1098) 8,377 stars - [Goldziher/kreuzberg](https://github.com/Goldziher/kreuzberg/pull/142) 7,550 stars - [python-attrs/attrs](https://github.com/python-attrs/attrs/commit/c95b177682e76a63478d29d040f9cb36a8d31915) 5,770 stars - [jlowin/fastmcp](https://github.com/jlowin/fastmcp/pull/2309) 24,539 stars - [apache/iggy](https://github.com/apache/iggy/pull/2383) 4,116 stars - [apache/lucene](https://github.com/apache/lucene/pull/15629) 3,401 stars - [jcrist/msgspec](https://github.com/jcrist/msgspec/pull/918) 3,692 stars - [MoonshotAI/kimi-cli](https://github.com/MoonshotAI/kimi-cli/pull/535) 7,800 stars - [simple-icons/simple-icons](https://github.com/simple-icons/simple-icons/pull/14245) 24,873 stars - [ast-grep/ast-grep](https://github.com/ast-grep/ast-grep.github.io/commit/e30818144b2967a7f9172c8cf2f4596bba219bf5) 13,413 stars - [commitizen-tools/commitizen](https://github.com/commitizen-tools/commitizen) 3,377 stars - [cocoindex-io/cocoindex](https://github.com/cocoindex-io/cocoindex/pull/1564) 6,865 stars - [cachix/devenv](https://github.com/cachix/devenv/pull/2304) 6,665 stars - [pyodide/pyodide](https://github.com/pyodide/pyodide/pull/6182) 14,527 stars - [prowler-cloud/prowler](https://github.com/prowler-cloud/prowler/pull/10601) 13,592 stars - [getsentry/sentry](https://github.com/getsentry/sentry/pull/110808) 43,639 stars ## Acknowledgements This project is heavily inspired by the original [pre-commit](https://pre-commit.com/) tool, and it wouldn't be possible without the hard work of the maintainers and contributors of that project. And a special thanks to the [Astral](https://github.com/astral-sh) team for their remarkable projects, particularly [uv](https://github.com/astral-sh/uv), from which I've learned a lot on how to write efficient and idiomatic Rust code.