> ## Documentation Index
> Fetch the complete documentation index at: https://mf2.dev/docs/llms.txt
> Use this file to discover all available pages before exploring further.

# Formatting

> Code quality with Ultracite and Biome.

mf² uses [Ultracite](https://ultracite.ai) for linting and formatting. Ultracite is a zero-config preset built on [Biome](https://biomejs.dev), a Rust-based toolchain that replaces ESLint and Prettier.

```bash theme={null}
bun run check    # lint and format check
bun run fix      # auto-fix issues
```

A [Lefthook](https://lefthook.dev/) pre-commit hook runs `ultracite check` before every commit.

Configuration lives in `biome.jsonc` at the project root. Ultracite provides the defaults; override individual rules as needed.

See [Ultracite docs](https://docs.ultracite.ai).