This repository provides Biome hooks for pre-commit.

The following section assumes that you installed pre-commit and run pre-commit install in your repository.

Biome provides four hooks:

hook id	description
biome-ci	Check formatting, check if imports are organized, and lints
biome-check	Format, organize imports, lint, and apply safe fixes to the committed files
biome-format	Format the committed files
biome-lint	Lint and apply safe fixes to the committed files

For example, if you want to use the biome-check hook, add the following pre-commit configuration to the root of your project in a file named .pre-commit-config.yaml:

repos:
  - repo: https://github.com/biomejs/pre-commit
    rev: v2.4.4 # Use the sha / tag you want to point at
    hooks:
      - id: biome-check

If Biome is already installed as a npm package in your local repository, then it can be a burden to update both package.json and .pre-commit-config.yaml when you update Biome. Instead of using the provided Biome hooks, you can specify your own local hook.

For example, if you use npm, you can write the following hook in .pre-commit-config.yaml:

repos:
  - repo: local
    hooks:
      - id: local-biome-check
        name: biome check
        entry: npx biome check --write --files-ignore-unknown=true --no-errors-on-unmatched
        language: system
        types: [text]
        files: "\\.(jsx?|tsx?|c(js|ts)|m(js|ts)|d\\.(ts|cts|mts)|jsonc?|css|svelte|vue|astro|graphql|gql)$"

The pre-commit option files is optional, because Biome is able to ignore unknown files (using the option --files-ignore-unknown=true).