ultracite

# Ultracite Skill

**Fast, zero-config linting and formatting for modern JavaScript/TypeScript projects**

## Overview

Ultracite is a unified linting and formatting solution that supports multiple providers: **Biome** (default, Rust-based), **ESLint+Prettier+Stylelint**, and **Oxlint+Oxfmt**. It provides framework-specific presets and zero-configuration defaults, replacing traditional ESLint+Prettier setups with a faster, simpler alternative. Ultracite operates invisibly in the background, automatically formatting code and applying fixes on every save.

**Version 7 Changes**: Multi-provider architecture, preset path migration, MCP server support, AI hooks
**Version 6 Changes**: Framework-specific presets introduced (React, Next.js, Vue, Svelte, etc.)

### Core Goals

1. **Lightning-Fast Performance**: Leverages Biome's Rust implementation for instant linting/formatting
2. **Zero-Config Design**: Ships with 200+ sensible defaults optimized for modern TypeScript development
3. **Simplicity & Invisibility**: Operates with minimal user interaction
4. **Type Safety**: Enforces TypeScript strict mode and comprehensive null/undefined handling
5. **Tool Compatibility**: Works alongside other development tools without conflicts

### Key Benefits vs Alternatives

**vs ESLint + Prettier:**
- 10-100x faster performance (Rust vs JavaScript)
- Single tool instead of two
- Zero configuration needed
- Auto-fixes on save by default
- Built-in TypeScript strict mode

**vs Biome alone:**
- 200+ preconfigured rules
- Framework-specific presets (React, Next.js, Vue, Svelte)
- AI editor integration (Cursor, Claude Code, Copilot)
- Git hook integrations
- Migration tooling

## When to Use This Skill

### ✅ Ideal Projects

Use Ultracite when:
- Starting a new JavaScript/TypeScript project
- Building with React, Next.js, Vue, Svelte, or other modern frameworks
- Working in monorepos (Turborepo, Nx, Lerna)
- Teams want consistent formatting without bikeshedding
- Performance is critical (la