[renovate]

This PR contains the following updates:

Package	Type	Update	Change
prek	tools	minor	0.4.12 → 0.5.7

---

Release Notes

j178/prek (prek)

v0.5.7

Compare Source

Released on 2026-10-21.

Enhancements

• Support system Rust toolchains without rustup (#​2887)

Performance

• Use blocking file checks for CPU-heavy builtin hooks (#​2910)

Other changes

• Update CA root crates and uv for the eMudhra intermediate CA compromise (#​2919)

Contributors

• @​shaanmajid
• @​j178

v0.5.6

Compare Source

Released on 2026-10-19.

Enhancements

• Add builtin hook check-commit-trailers (#​2885)
• Add builtin hook check-signed-commit (#​2725)

Performance

• Enable PGO for native release builds (#​2890)
• Reduce hook process launches with balanced batches (#​2907)
• Resolve hook commands before batching (#​2840)

Bug fixes

• Accept UTF-8 BOM in check-json (#​2879)
• Preserve unquoted dotted revisions in prek update (#​2853)

Documentation

• Document standalone installer options (#​2859)
• Update benchmarks for prek 0.5.5 (#​2786)

Other changes

• Enable ICF for release builds (#​2891)
• Update uv to 0.13.0 (#​2856)

Contributors

• @​ebuildy
• @​j178
• @​shaanmajid

v0.5.5

Compare Source

Released on 2026-10-05.

Enhancements

• Add Nushell completion generation (#​2785)
• Add ppc64le wheel and binary builds (#​2809)

Performance

• Avoid JSON imports when querying Python interpreters (#​2790)
• Avoid duplicate diffs after hooks rewrite files (#​2815)
• Batch file reads in shebang checks (#​2793)
• Check cached hook environments concurrently (#​2797)
• Overlap Git discovery with worktree status checks (#​2821)
• Query staged additions only for case conflicts (#​2802)
• Reduce worker overhead in XML and pygrep checks (#​2789)
• Reuse Git worktree state during hook startup (#​2787)
• Reuse intent-to-add paths when saving unstaged changes (#​2788)
• Run Git queries concurrently for case-conflict checks (#​2792)
• Share Bun and Deno version queries across environments (#​2795)
• Share Lua runtime probes across hook environments (#​2796)
• Share Ruby version queries across hook environments (#​2794)
• Share mise version queries across hook environments (#​2798)
• Skip site initialization in Python interpreter probes (#​2822)
• Skip untracked files in destroyed symlink checks (#​2799)
• Skip unused file input for always-run hooks (#​2813)

Bug fixes

• Preserve staged and unstaged changes on conflicted stash restore (#​2803)
• Default missing core.fileMode in shebang checks (#​2832)
• Match protected branch patterns from the start (#​2829)
• Normalize explicit paths in shebang index checks (#​2831)
• Preserve empty trailing-whitespace character sets (#​2830)
• Reject empty files in check-json (#​2826)
• Reject trailing data in check-json (#​2828)
• Round up file sizes in check-added-large-files (#​2827)

Documentation

• Redesign the prek badge and refresh logo details (#​2818)

Contributors

• @​imphil
• @​j178

v0.5.4

Compare Source

Released on 2026-09-28.

Highlights

Faster builtin hooks

In our end-to-end benchmark, prek is about 38% faster than 0.5.3, with some builtin
hooks up to 273% faster (check-yaml: 273%, check-json: 80%,
check-merge-conflict: 71%).

Enhancements

• Add include_deleted to allow hooks to include deleted files (#​2733)
• Add --check and simplify end-of-file-fixer (#​2764)
• Add --check to file-contents-sorter (#​2765)
• Add --check to requirements-txt-fixer (#​2766)
• Add --check to trailing-whitespace (#​2763)
• Expose and document prek util generate-shell-completion (#​2727)
• Support hide_status in project and user configuration (#​2760)
• Support look-around regex in builtin pattern hooks (#​2732)

Performance

• Cache the resolved Git executable on macOS (#​2726)
• Combine and cache Git repository path queries (#​2724)
• Optimize common builtin hook execution (#​2768)
• Optimize scanning in mixed-line-ending and trailing-whitespace (#​2769)
• Scan check-merge-conflict files in fixed-size blocks (#​2781)
• Use SIMD UTF-8 validation in check-json, check-toml, and check-yaml (#​2770)

Bug fixes

• Retry transient rename failures on Windows (#​2756)
• Use PATH to resolve prek in completion scripts (#​2719)

Documentation

• Clarify the flow and scope of usage guides (#​2710)
• Reorganize usage guides and reference documentation (#​2709)

Other changes

• Sync latest identify tags (#​2762)

Contributors

• @​github-actions
• @​j178

v0.5.3

Compare Source

Released on 2026-09-13.

Enhancements

• Add PEP 740 attestations for PyPI releases (#​2705)
• Add a check-jsonc builtin hook (#​2682)
• Allow disabling automatic uv installation (#​2702)

Bug fixes

• Fix Julia additional dependency specifiers (#​2703)
• Update granit-parser to fix YAML flow indentation (#​2707)

Contributors

• @​clbarnes
• @​j178
• @​tisonkun

v0.5.2

Compare Source

Released on 2026-09-03.

Enhancements

• Allow unknown tags by default in check-yaml (#​2678)

Contributors

• @​j178

v0.5.1

Compare Source

Released on 2026-09-01.

Enhancements

• Add --hide-status <passed|failed|skipped> for hook reports (#​2644)
• Add prek init for repository setup (#​2636)
• Apply hook env during environment creation (#​2650)
• Disable error snippets in check-yaml diagnostics (#​2664)
• Show hooks excluded by skip selectors (#​2645)
• Support Pixi for Conda environments (#​2667)
• Support cargo-binstall for Rust CLI dependencies (#​2658)
• Warn about unused keys in user settings (#​2665)

Bug fixes

• Reject unsupported YAML tags in check-yaml (#​2656)

Documentation

• Clarify local hook documentation (#​2640)
• Clarify pre-commit command compatibility (#​2635)
• Document automatic PR fixes with autofix.ci (#​2643)
• Document check-yaml unsafe support (#​2632)
• Improve setup and workflow documentation (#​2637)

Other changes

• Drop low-usage release targets (#​2651)
• Generate a prek manifest JSON schema (#​2648)

Contributors

• @​j178

v0.5.0

Compare Source

Released on 2026-08-27.

Highlights

Choose where hook toolchains come from

language_version now accepts a source preference alongside the version
request, letting you control where prek looks for a compatible toolchain when
it creates a hook environment. Use managed (the default) or system to choose
which source prek tries first while still allowing fallback and downloads. Use
only-managed or only-system to require one source.

For example, this local Ruff hook requires a Python 3.12 toolchain managed by
prek:

repos:
  - repo: local
    hooks:
      - id: ruff
        name: ruff
        language: python
        entry: ruff check
        additional_dependencies: [ruff]
        language_version:
          request: "3.12"
          preference: only-managed

With only-managed, prek reuses a compatible toolchain from its managed store
or downloads one when needed. It never falls back to Python from PATH, an OS
package manager, or a version manager, so toolchain selection does not depend on
the developer or CI machine's external environment.

Existing scalar values such as language_version: "3.12" continue to work. See
toolchain management and language_version
for the full source-selection behavior. (#​2613)

Breaking changes

The breaking changes in this release are mostly small cleanups, and most users should not be affected.

• Group names can no longer start with @. This prefix is now reserved for special group selectors such as the new @ungrouped selector. (#​2617)
• PREK_MAX_CONCURRENCY has been removed. Use PREK_CONCURRENT_HOOKS and PREK_CONCURRENT_BATCHES to control hook and per-hook batch concurrency separately. (#​2620)
• The top-level prek init-template-dir command has been removed. Use prek util init-template-dir, or prek init-templatedir for drop-in compatibility with pre-commit. (#​2623)
• prek auto-update has been removed. Use prek update, or prek autoupdate for drop-in compatibility with pre-commit. (#​2619)

Enhancements

• Add configurable toolchain source preferences (#​2613)
• Allow explicit language: python to opt out of fast-path hooks (#​2608)
• Group run and update options in CLI help (#​2629)
• Preserve terminal theme contrast for status labels (#​2592)
• Add @ungrouped group selector (#​2617)
• Retry uv installation with static musl binary (#​2600)
• Support {hook_repo} placeholder in hook entry (#​2602)

Bug fixes

• Expose the git work tree to hooks running outside the git root (#​2579)
• Isolate local hook environment installation (#​2615)
• Preserve hook config deserialization error locations (#​2573)
• Resolve hook log files from their config directory (#​2580)
• Track explicit config paths as absolute paths (#​2574)

Documentation

• Document prek run architecture (#​2630)
• Publish versioned documentation (#​2626)

Contributors

• @​jeromeheissler
• @​gurgeous
• @​j178

v0.4.14

Compare Source

Released on 2026-08-17.

Enhancements

• Support check-yaml unsafe mode (#​2546)

Performance

• Reuse allocations in common filters (#​2548)

Bug fixes

• Accept non-finite floats in check-yaml (#​2545)
• Allow comment-heavy YAML in check-yaml (#​2554)
• Sanitize captured terminal output before replay (#​2552)

Contributors

• @​j178

v0.4.13

Compare Source

Released on 2026-08-10.

Highlights

Manage hook tools with mise

The new language: mise support lets hooks install tools using
mise in an isolated environment:

repos:
  - repo: local
    hooks:
      - id: golangci-lint
        name: golangci-lint
        language: mise
        additional_dependencies: ["aqua:golangci/golangci-lint@2"]
        entry: golangci-lint run --fast-only ./...
        pass_filenames: false

Run commands in hook environments

The new prek exec subcommand can run an explicit command in a configured
hook's prepared environment. For example, the hook above makes its managed
binary available to this command:

$ prek exec golangci-lint -- golangci-lint --version

Enhancements

• Add mise language support (#​2540)
• Add deny-filename-pattern and require-filename-pattern hooks (#​2488)
• Add prek exec for running commands in a hook environment (#​2478)
• Add yaml-language-server: comment to YAML sample config (#​2486)
• Make prek cache size output terminal-aware (#​2508)
• Match file regexes against path bytes (#​2541)
• Show hook aliases in run output (#​2497)
• Show hook descriptions in run output (#​2490)

Performance

• Avoid env cache scans for skipped hooks (#​2502)
• Cache Node version queries (#​2500)

Bug fixes

• Fix Node hook installation with npm 11 (#​2487)
• Isolate dependency installs from inherited Git repository state (#​2506)

Documentation

• Document combined group filtering (#​2495)
• Explain what prek does in README (#​2507)
• Refresh "Why prek" highlights (#​2474)

Contributors

• @​will-wright-eng
• @​Repiteo
• @​j178

---

Configuration

📅 Schedule: (UTC)

• Branch creation
  • At any time (no schedule defined)
• Automerge
  • At any time (no schedule defined)

🚦 Automerge: Disabled by config. Please merge this manually once you are satisfied.

♻ Rebasing: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox.

🔕 Ignore: Close this PR and you won't be reminded about this update again.

---

• If you want to rebase/retry this PR, check this box

---

This PR was generated by Mend Renovate. View the repository job log.