This PR contains the following updates:

Release Notes

v0.4.5

Compare Source

Released on 2026-06-15.

✨Highlights

0.4.5 completes prek's pre-commit language coverage. With R, Conda, Perl,
and coursier now supported, prek supports every language available in
pre-commit, plus prek-only modern languages such as Bun and Deno.

This is full feature parity with pre-commit. The last major compatibility gap
is closed, and prek is now on the path to 1.0.

💚 Sponsorship

If prek saves time for you or your team, please consider sponsoring the
project on GitHub Sponsors. It helps keep
new features, performance work, and maintenance moving.

Enhancements

• Add Perl language support (#​2201)
• Add R language support (#​2206)
• Add Conda language support (#​2203)
• Add coursier language support (#​2194)
• Add group filters to list (#​2152)
• Remove legacy repo path support (#​2150)
• Skip cloning fully filtered remote repos (#​2151)

Performance

• Avoid building JSON trees in syntax hooks (#​2156)
• Scan mixed line endings without line vector (#​2160)
• Skip file scan for always-run no-filename hooks (#​2155)
• Use fixed buffer for EOF scan (#​2163)
• Use fixed buffer for private key scan (#​2164)

Bug fixes

• Fix pretty-format-json CRLF handling (#​2210)
• Handle missing blobs in diff snapshots (#​2211)
• Ignore coursier channel from working repo (#​2202)

Contributors

• @​j178

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