pypi / prek

prek

What changed in prek 0.5, from its official release notes, upgrade guides and advisories. Sources checked 2026-10-19.

2 breaking9 new APIs and options18 performance2 behavior and defaults2 tooling10 fixes and other

See which of these apply to your code, ranked, in your agent:

npx @unstale/cli init

prek 0.543 changes

Adds the builtin hook check-commit-trailers for validating commit trailers.
0.5.6release notes
Adds the builtin hook check-signed-commit for checking signed commits.
0.5.6release notes
The hook adds a --check option.
0.5.4release notes
The hook adds a --check option.
0.5.4release notes
Project and user configuration can now use hide_status.
0.5.4release notes
Hooks can be configured to include deleted files.
0.5.4release notes
Shell completion generation is exposed for users.
0.5.4release notes
The hook adds a --check option.
0.5.4release notes
The hook adds a --check option.
0.5.4release notes

Reduces hook process launches by using balanced batches.
0.5.6release notes
Unused file input is skipped for always-run hooks.
0.5.5release notes
Bun and Deno version queries are shared across environments.
0.5.5release notes
Cached hook environments are checked concurrently.
0.5.5release notes
Only staged additions are queried for case-conflict checks.
0.5.5release notes
Git queries run concurrently for case-conflict checks.
0.5.5release notes
Untracked files are skipped in destroyed symlink checks.
0.5.5release notes
Git discovery overlaps with worktree status checks.
0.5.5release notes
Git worktree state is reused during hook startup.
0.5.5release notes
Intent-to-add paths are reused when saving unstaged changes.
0.5.5release notes
Lua runtime probes are shared across hook environments.
0.5.5release notes
mise version queries are shared across hook environments.
0.5.5release notes
Site initialization is skipped in Python interpreter probes.
0.5.5release notes
JSON imports are avoided when querying Python interpreters.
0.5.5release notes
Ruby version queries are shared across hook environments.
0.5.5release notes
File reads are batched during shebang checks.
0.5.5release notes
Worker overhead is reduced in XML and pygrep checks.
0.5.5release notes
Builtin hook execution is faster; the end-to-end benchmark reports about 38% improvement over 0.5.3, with some hooks up to 273% faster.
0.5.4release notes

Shebang checks now default missing core.fileMode.
0.5.5release notes
Builtin pattern hooks now support look-around regular expressions.
0.5.4release notes

Accepts a UTF-8 BOM in JSON checked by the builtin hook.
0.5.6release notes
Preserves unquoted dotted revisions when updating.
0.5.6release notes
File sizes are rounded up.
0.5.5release notes
Staged and unstaged changes are preserved when stash restore encounters conflicts.
0.5.5release notes
Duplicate diffs are avoided after hooks rewrite files.
0.5.5release notes
Protected branch patterns are matched from the start.
0.5.5release notes
Explicit paths are normalized in shebang index checks.
0.5.5release notes
Empty character sets are preserved.
0.5.5release notes
Completion scripts resolve prek using PATH.
0.5.4release notes
Transient rename failures are retried on Windows.
0.5.4release notes