# pre-commit v4.0.0 — pre-commit v4.0.0

- Product: pre-commit (https://whatsnew.fyi/product/pre-commit)
- Vendor: pre-commit
- Date: 2024-10-05
- Version: v4.0.0
- Original notes: https://github.com/pre-commit/pre-commit/releases/tag/v4.0.0
- Permalink: https://whatsnew.fyi/product/pre-commit/releases/v4.0.0

What's New is an index, not a publisher: every entry below links to the vendor's own release notes, which are the authoritative source. Entries are labelled where they are hand-curated sample data, pre-releases, or drawn from a secondary source such as a developer blog.

Reuse: the summaries, labels and curation here are © What's New. Quote freely with attribution and a link back; wholesale republication of the corpus is not permitted — terms: https://whatsnew.fyi/terms. The vendors' own release notes remain their publishers'.

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- **changed** — Improve `pre-commit migrate-config` to handle more yaml formats
- **changed** — Handle `stages` deprecation in `pre-commit migrate-config`
- **changed** — Upgrade `ruby-build`
- **added** — Add "sensible regex" warnings to `repo: meta`
- **added** — Add warnings for deprecated `stages` (`commit` -> `pre-commit`, `push` -> `pre-push`, `merge-commit` -> `pre-merge-commit`)
- **removed** — Remove `language: python_venv` -- use `language: python` instead

###### Features
- Improve `pre-commit migrate-config` to handle more yaml formats.
    - #3301 PR by @asottile.
- Handle `stages` deprecation in `pre-commit migrate-config`.
    - #3302 PR by @asottile.
    - #2732 issue by @asottile.
- Upgrade `ruby-build`.
    - #3199 PR by @ThisGuyCodes.
- Add "sensible regex" warnings to `repo: meta`.
    - #3311 PR by @asottile.
- Add warnings for deprecated `stages` (`commit` -> `pre-commit`, `push` ->
  `pre-push`, `merge-commit` -> `pre-merge-commit`).
    - #3312 PR by @asottile.
    - #3313 PR by @asottile.
    - #3315 PR by @asottile.
    - #2732 issue by @asottile.

###### Migrating
- `language: python_venv` has been removed -- use `language: python` instead.
    - #3320 PR by @asottile.
    - #2734 issue by @asottile.