Ultracite
Ultracite is an open-source, zero-configuration preset for Biome, Oxlint and ESLint. It lints and formats JavaScript and TypeScript code and checks each edit an AI coding agent makes against a strict, shared set of rules.
About Ultracite
What is Ultracite?
Ultracite is an open-source, zero-configuration preset for Biome, Oxlint and ESLint. It lints and formats JavaScript and TypeScript code and checks every edit an AI coding agent makes against strict rules.
What it does
- One-command setup:
npx ultracite initconfigures the linter, your editor, your agents and git hooks - Hundreds of rules for type safety, React, accessibility and async code, plus 15 framework presets
- Agent integration: rules in AGENTS.md, an installable skill and post-edit hooks for Claude Code, Codex, Cursor, Copilot and more
- CLI:
check,fix,doctorandupgrade - v8 adds a single AGENTS.md rules file, an opt-in type-aware preset and a safer init
Pricing
Free and open source under the MIT license, supported through GitHub Sponsors.
Value & Audience
Value Proposition
Configures Biome, Oxlint or ESLint with strict rules in one command, so both developers and AI agents produce consistent, type-safe code.
Problem Solved
When AI agents write much of a project's code, style and correctness drift, and wiring linters, formatters, editors and agent hooks by hand takes time. Ultracite sets this up from one preset and fixes problems after each agent edit.
Tech Stack
Social & Links
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Feedback & Roadmap
Ultracite FAQ
Common questions about Ultracite's features, pricing, and use cases
What does Ultracite do?
Zero-config lint and format preset for AI coding agents Configures Biome, Oxlint or ESLint with strict rules in one command, so both developers and AI agents produce consistent, type-safe code.
Is Ultracite free to use?
Ultracite is open source and free to use, in the Developer Tools category.
What problem does Ultracite solve?
When AI agents write much of a project's code, style and correctness drift, and wiring linters, formatters, editors and agent hooks by hand takes time. Ultracite sets this up from one preset and fixes problems after each agent edit.
Who is Ultracite built for?
Ultracite is built for Developers, Frontend Developers, Full-Stack Developers, Open Source Maintainers, Startups.
What tech stack does Ultracite use?
Ultracite is built with TypeScript, Biome, Oxlint, ESLint, Node.js.
What category is Ultracite listed under?
Ultracite is listed in the Developer Tools category on TechLogHub, alongside curated alternatives with community ratings and pricing comparisons.
Ultracite appears in
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