Ultracite

Ultracite is a strongly opinionated linting and formatting preset designed to standardize and simplify code quality tooling across modern JavaScript and TypeScript projects. It integrates with ESLint, Biome, and Oxlint to provide a consistent, type-safe development experience without requiring teams to manage complex configurations. The primary purpose of Ultracite is to help both developers and AI-generated code adhere to a unified set of rules that emphasize correctness, readability, and maintainability.

The tool ships with a curated set of rules and defaults focused on type safety, consistent style, and modern language features, reducing the need for manual tuning or rule-by-rule decisions. It is designed to work well in AI-assisted workflows, ensuring that code produced by large language models automatically conforms to the same standards as human-written code. Ultracite emphasizes compatibility with TypeScript, React, and contemporary build setups, and is structured to minimize conflicts between ESLint, Biome, and Oxlint. Its configuration aims to be stable and predictable, so teams can upgrade with minimal friction while maintaining a coherent codebase.