Ultracite is a zero-configuration Biome preset designed to enhance code quality and consistency for teams and AI code generation tools. It offers sub-second linting and formatting for JavaScript, TypeScript, and React projects, aiming to reduce friction in code reviews and development workflows.

How It Works

Built in Rust, Ultracite leverages the speed of the Biome toolchain to provide automatic code formatting and lint fixing on save. Its core advantage lies in its preconfigured, opinionated rules optimized for modern web development stacks like Next.js, React, and TypeScript, ensuring maximum type safety and import organization without requiring manual setup.

Quick Start & Requirements

• Install and initialize: npx ultracite init
• Prerequisites: Node.js, npm/pnpm/yarn.
• Setup time: Near-instantaneous.
• Documentation: https://github.com/haydenbleasel/ultracite#readme

Highlighted Details

• Subsecond performance via Rust implementation.
• Zero-configuration by default, with customization options.
• Enforces strict type checking and best practices.
• Monorepo support for unified toolchain configuration.
• AI-friendly, compatible with GitHub Copilot, Cursor, and others.

Maintenance & Community

• Used by over 500 developers.
• Tests are written in Vitest; run with pnpm test.

Licensing & Compatibility

• License: MIT.
• Compatible with commercial and closed-source projects.

Limitations & Caveats

Ultracite is primarily optimized for Next.js, React, and TypeScript projects, and its zero-config approach may require customization for other frameworks or languages.