prek Files

Release Notes

Released on 2026-02-06.

Highlights

• prek.toml is here!

  You can now use prek.toml as an alternative to .pre-commit-config.yaml for configuring prek. prek.toml mirrors the structure of .pre-commit-config.yaml, but TOML is less error-prone. Your existing .pre-commit-config.yaml will continue to work, but for new users and new projects, prek.toml may make more sense. If you want to switch, run prek util yaml-to-toml to convert YAML configs to prek.toml. See configuration docs for details.

  For example, this config:

  ```yaml repos:

  • repo: https://github.com/pre-commit/pre-commit-hooks rev: v6.0.0 hooks:
    • id: check-yaml ```

  Can be written as prek.toml like this:

  toml [[repos]] repo = "https://github.com/pre-commit/pre-commit-hooks" rev = "v6.0.0" hooks = [ { id = "check-yaml" } ]

• serde-yaml has been replaced with serde-saphyr

  We replaced the long-deprecated serde-yaml crate with serde-saphyr for YAML parsing. It is written in safe Rust and has better error messages, performance, and security. This lets us provide precise location information for configuration parsing errors, which should make it easier to fix config issues.

  For example, this invalid config:

  ```yaml repos:

  • repo: https://github.com/crate-ci/typos hooks:
    • id: typos ```

  Before:

  console $ prek run error: Failed to parse `.pre-commit-config.yaml` caused by: Invalid remote repo: missing field `rev`

  Now:

  console $ prek run error: Failed to parse `.pre-commit-config.yaml` caused by: error: line 2 column 5: missing field `rev` at line 2, column 5 --> <input>:2:5 | 1 | repos: 2 | - repo: https://github.com/crate-ci/typos | ^ missing field `rev` at line 2, column 5 3 | hooks: 4 | - id: typos |

• prek util subcommands

  We added a new prek util top-level command for miscellaneous utilities that don't fit into other categories. The first two utilities are:

  • prek util identify: shows the identification tags of files that prek uses for file filtering, which can be useful for debugging and writing types/types_or/exclude_types filters.
  • prek util yaml-to-toml: converts .pre-commit-config.yaml to prek.toml.

  We also moved prek init-template-dir under prek util for better organization. The old prek init-template-dir command is still available (hidden) as an alias for backward compatibility.

Enhancements

• Add prek util identify subcommand (#1554)
• Add prek util yaml-to-toml to convert .pre-commit-config.yaml to prek.toml (#1584)
• Detect install source for actionable upgrade hints (#1540)
• Detect prek installed by the standalone installer (#1545)
• Implement serialize_yaml_scalar using serde-saphyr (#1534)
• Improve max cli arguments length calculation (#1518)
• Move identify and init-template-dir under the prek util top-level command (#1574)
• Replace serde-yaml with serde-saphyr (again) (#1520)
• Show precise location for config parsing error (#1530)
• Support Julia language (#1519)
• Support prek.toml (#1271)
• Added PREK_QUIET environment variable support (#1513)
• Remove upper bound constraint of uv version (#1588)

Bug fixes

• Do not make the child a session leader (#1586)
• Fix FilePattern schema to accept plain strings (#1564)
• Use semver fallback sort when tag timestamps are equal (#1579)

Documentation

• Add OpenClaw to the list of users (#1517)
• Add cachix/devenv, apache/lucene, copper-project/copper-rs as projects using prek (#1531, #1514, #1569)
• Add document about authoring remote hooks (#1571)
• Add llms.txt generation for LLM-friendly documentation (#1553)
• Document using --refresh to pick up .prekignore changes (#1575)
• Fix PowerShell completion instruction syntax (#1568)
• Update quick start to use prek.toml (#1576)

Other changes

• Include prek.toml in run hint for config filename (#1578)

Contributors

• @fatelei
• @domenkozar
• @makeecat
• @fllesser
• @j178
• @copilot-swe-agent
• @oopscompiled
• @rmuir
• @shaanmajid

Install prek 0.3.2

Install prebuilt binaries via shell script

:::sh
curl --proto '=https' --tlsv1.2 -LsSf https://github.com/j178/prek/releases/download/v0.3.2/prek-installer.sh | sh

Install prebuilt binaries via powershell script

:::sh
powershell -ExecutionPolicy Bypass -c "irm https://github.com/j178/prek/releases/download/v0.3.2/prek-installer.ps1 | iex"

Install prebuilt binaries via Homebrew

:::sh
brew install j178/tap/prek

Install prebuilt binaries into your npm project

:::sh
npm install @j178/prek@0.3.2

Download prek 0.3.2

File	Platform	Checksum
prek-aarch64-apple-darwin.tar.gz	Apple Silicon macOS	checksum
prek-x86_64-apple-darwin.tar.gz	Intel macOS	checksum
prek-aarch64-pc-windows-msvc.zip	ARM64 Windows	checksum
prek-i686-pc-windows-msvc.zip	x86 Windows	checksum
prek-x86_64-pc-windows-msvc.zip	x64 Windows	checksum
prek-aarch64-unknown-linux-gnu.tar.gz	ARM64 Linux	checksum
prek-i686-unknown-linux-gnu.tar.gz	x86 Linux	checksum
prek-riscv64gc-unknown-linux-gnu.tar.gz	RISCV Linux	checksum
prek-s390x-unknown-linux-gnu.tar.gz	S390x Linux	checksum
prek-x86_64-unknown-linux-gnu.tar.gz	x64 Linux	checksum
prek-armv7-unknown-linux-gnueabihf.tar.gz	ARMv7 Linux	checksum
prek-aarch64-unknown-linux-musl.tar.gz	ARM64 MUSL Linux	checksum
prek-i686-unknown-linux-musl.tar.gz	x86 MUSL Linux	checksum
prek-x86_64-unknown-linux-musl.tar.gz	x64 MUSL Linux	checksum
prek-arm-unknown-linux-musleabihf.tar.gz	ARMv6 MUSL Linux (Hardfloat)	checksum
prek-armv7-unknown-linux-musleabihf.tar.gz	ARMv7 MUSL Linux	checksum

Verifying GitHub Artifact Attestations

The artifacts in this release have attestations generated with GitHub Artifact Attestations. These can be verified by using the GitHub CLI:

:::sh
gh attestation verify <file-path of downloaded artifact> --repo j178/prek

You can also download the attestation from GitHub and verify against that directly:

:::sh
gh attestation verify <file-path of downloaded artifact> --bundle <file-path of downloaded attestation>