> ## Documentation Index
> Fetch the complete documentation index at: https://docs.coderabbit.ai/llms.txt
> Use this file to discover all available pages before exploring further.

# Biome

> CodeRabbit's guide to Biome.

[Biome](https://biomejs.dev/) is a linter for JavaScript, TypeScript, JSX, TSX, JSON, JSONC, CSS.

## Files

Biome will run on files with the following extensions:

* `.js`
* `.mjs`
* `.cjs`
* `.jsx`
* `.ts`
* `.mts`
* `.cts`
* `.tsx`
* `.vue`
* `.astro`
* `.svelte`
* `.json`
* `.jsonc`
* `.css`

## Configuration

Biome supports the following config files:

* `biome.jsonc`
* `biome.json`

CodeRabbit will use the default settings based on the profile selected if no config file is found.

## When we skip Biome

CodeRabbit will skip running Biome when:

* Biome is already running in GitHub workflows.
* The config file schema version is greater than the Biome version used by CodeRabbit.
* The repository's Biome config is invalid or contains unsupported keys.

## Notes

* Files in `node_modules/` directories are automatically excluded.
* Biome configuration is validated against the schema version; if the config uses a newer schema version than the installed Biome version, the tool will be skipped.

## Links

* [Biome Configuration](https://biomejs.dev/reference/configuration/)