Ultracite
Opinionated, zero-config code linter and formatter
FreeOpen SourceCI6,633 impressions#7 of its week1 comment
Comments
>log in to comment- Zain Sheikh· 3mo ago
Building on Biome instead of rolling your own engine is the right call, and zero-config is exactly what most JS/TS repos need. How opinionated are the defaults if a team already has an ESLint config?
Ultracite is a zero-config preset that combines Oxlint, Biome and ESLint to lint and format JavaScript/TypeScript code.
- for
- JS/TS developers and teams that want ready-made linting/formatting with AI agent support
- pricing
- free
- license
- MIT
- ultracite@7.12.217 days ago
- ultracite@7.12.118 days ago
- ultracite@7.12.0a month ago
Key features
- Zero-config presets — Provides pre-configured rules for Oxlint, Biome and ESLint that work out of the box.
- Agent integration — Generates rule files and hooks for 41 AI agents (Claude, Codex, Gemini, etc.) to enforce standards.
- Editor auto-setup — Creates settings for VS Code, Cursor, Windsurf and many other editors for format-on-save.
- Customizable presets — Strict defaults can be overridden with your own rule overrides.
- Pre-commit hooks — Optionally adds Husky, Lefthook, lint-staged or pre-commit hooks during init.
- Auto-fix and agent-fix commands — Runs autofix for mechanical issues and delegates remaining diagnostics to AI agents via CLI.
Use cases
- Enforce consistent code style across a team without manual ESLint/Prettier config
- Automatically format and lint code on save in VS Code or other supported editors
- Use AI agents to fix complex linting issues that autofix cannot resolve
- Bootstrap a new project with a single command that sets up linting, formatting and editor config
Ultracite vs alternatives
 Ultracite |  Automock |  Fluent CI |  Pocketenv |  Pieces Copilot | |
|---|---|---|---|---|---|
| Best for | Zero-config linting & formatting for modern web projects | Simpler TypeScript unit testing | TypeScript-based CI pipelines | Agent sandbox runtime | AI-assisted coding workflow |
| Pricing | Free | Free | Free | Free | Free |
| DevHunt upvotes | 3 | 148 | 158 | 73 | 63 |
| Launched | Jul 2026 | Jan 2023 | Jan 2024 | Apr 2026 | Mar 2024 |
- Ultracite vs Automock: Automock focuses on simplifying unit tests, while Ultracite handles linting/formatting and AI agent integration.
- Ultracite vs Fluent CI: Fluent CI lets you write CI pipelines in TypeScript, whereas Ultracite is a lint/format tool for code quality.
- Ultracite vs Pocketenv: Pocketenv provides a sandbox runtime for agents, while Ultracite provides linting/formatting presets for agents.
- Ultracite vs Pieces Copilot: Pieces Copilot is an AI coding sidekick, whereas Ultracite supplies linting/formatting rules and agent-fix commands.
Ultracite FAQ
How do I install Ultracite?+
Run `npx ultracite@latest init` and follow the interactive prompts to set up linting, formatting and editor config.
Can I customize the preset rules?+
Yes, you can override any rule by editing the generated config files for Oxlint, Biome or ESLint.
What AI agents does Ultracite support?+
It provides rule files and hooks for agents such as Claude Code, Codex, Gemini, Warp, OpenCode, Qwen Code, GitHub Copilot and thousands more.
Does Ultracite work with my existing editor?+
It generates settings for many editors, including VS Code, Cursor, Windsurf, CodeBuddy and others, enabling format-on-save.
Do I need to add pre-commit hooks?+
Hooks are optional; during init you can select Husky, Lefthook, lint-staged or pre-commit if desired.
Summarized by DevHunt from ultracite.ai · Oct 2, 2026. Details may change; check the official site.
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