# Biome

> Biome fast formatter and linter. Use for code quality.

- Skill: `majiayu000/biome-2` (Agent Skill, multi-file: 2 files)
- Install (CLI): `npx skillmds add majiayu000/biome-2`
- Raw SKILL.md: https://api.skillmd.com/api/skills/majiayu000/biome-2/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: AI & ML
- Author: majiayu000 (https://skillmd.com/u/majiayu000)
- Updated: 2026-09-09
- Page: https://skillmd.com/skills/majiayu000/biome-2

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# Biome

Biome (formerly Rome) is a unified toolchain. It replaces **Prettier** and **ESLint**. v2.0 (2025) adds a plugin system (GritQL) and multi-file analysis.

## When to Use

- **Greenfield Projects**: Start with Biome for instant linting/formatting.
- **CI Speed**: It lints a monorepo in milliseconds.
- **Simplicity**: One config file `biome.json`.

## Core Concepts

### Formatter

97% compatibility with Prettier.

### Linter

100+ rules. fast, informative diagnostics.

### Analyzer

Understands import graphs (unlike ESLint which mostly checks single files).

## Best Practices (2025)

**Do**:

- **Migrate**: Use `biome migrate` to import Prettier/ESLint configs.
- **Use Editor Extension**: The VS Code extension is extremely fast.

**Don't**:

- **Don't mix with Prettier**: Pick one.

## References

- [Biome Documentation](https://biomejs.dev/)