biome

SKILL.md

Fast, Rust-based linter and formatter replacing ESLint and Prettier with 100x speed improvement.

Single tool combining linting, formatting, and import sorting with zero-config defaults and TypeScript-first design

Supports three core commands: check (lint + format together), format (formatting only), and lint (linting only), all with --write for automatic fixes

Includes VS Code extension with format-on-save, organized rule categories (correctness, style, suspicious, performance, security, a11y), and file-level overrides for monorepo and project-specific configurations

Native monorepo support, intelligent caching, parallel CPU processing, and seamless migration tools from ESLint and Prettier configurations

Biome - Fast All-in-One Toolchain

Overview

Biome is a fast, all-in-one toolchain for web projects written in Rust. It replaces both ESLint and Prettier with a single tool that's 100x faster and provides zero-config defaults.

Key Features:

Single tool for linting and formatting

100x faster than ESLint

Zero configuration by default

Built-in import sorting

TypeScript-first design

Partial Prettier compatibility

Native monorepo support

VS Code integration