ultracite
Ultracite is a zero-configuration linter and formatter preset for JavaScript/TypeScript that supports ESLint, Biome, and Oxlint. It provides battle-tested rule configurations out-of-the-box and integrates with AI coding assistants and multiple editors.
Key facts
Objective fields from the source. Values we can't verify are shown as “Unknown” rather than guessed.
| Field | Value |
|---|---|
| Repository | haydenbleasel/ultracite |
| Owner | haydenbleasel |
| Primary language | TypeScript |
| License | MIT — OSI-approved |
| Stars | 3.1k |
| Forks | 116 |
| Open issues | 4 |
| Latest release | [email protected] (2026-07-08) |
| Last updated | 2026-07-08 |
| Source | https://github.com/haydenbleasel/ultracite |
What ultracite is
TypeScript-based configuration wrapper that abstracts ESLint, Biome, and Oxlint toolchains with preconfigured rulesets, type-aware linting support, and CLI commands for init, check, and fix workflows. Supports monorepo structures and generates AI context files for multiple agents.
Get the ultracite source
Clone the repository and explore it locally.
git clone https://github.com/haydenbleasel/ultracite.gitcd ultracite# follow the project's README for install & configurationNeed it deployed, integrated, or customized instead? DEV.co ships production installs.
Best use cases
Implementation considerations
- Interactive `init` command detects package managers automatically; CI/CD integration uses `--quiet` flag with explicit `--linter`, `--pm`, and `--agents` flags to avoid prompts.
- Type-aware linting (enabled via `--type-aware` flag) increases initialization time; verify TypeScript compilation performance in large monorepos before enabling globally.
- Presets are published separately (Biome, ESLint, Oxlint, Oxfmt, Prettier, Stylelint); ensure transitive dependency versions are compatible with your framework and Node version.
- The `doctor` command diagnoses configuration drift; run it in CI to detect configuration inconsistencies before they affect linting results.
- AI context files (e.g., `AGENTS.md`) are generated during `init`; review and version-control them to prevent drift between human and AI-assisted code.
When to avoid it — and what to weigh
- Highly Customized Linting Rules Required — Ultracite is opinionated by design; if your project demands extensive rule customization or non-standard rulesets, the zero-config philosophy may conflict with your needs.
- Legacy JavaScript or Non-Standard Syntax — Ultracite is optimized for modern JavaScript and TypeScript; projects using older ECMAScript versions or experimental syntax may encounter unsupported rule combinations.
- Vendor Lock-in Concerns with Preset Updates — Presets are maintained by Ultracite; breaking changes in future releases could force config adjustments across your codebase.
- Offline or Air-Gapped Environments — Interactive `npx ultracite init` and preset fetching depend on network connectivity; offline deployment requires pre-caching or manual configuration.
License & commercial use
MIT License. Permits unrestricted use, modification, and distribution for commercial and private purposes, provided the original copyright notice and license text are included.
MIT is a permissive OSI-approved license with no restrictions on commercial use. No license review required for standard commercial deployment. Ensure copyright attribution is retained in bundled or distributed copies.
DEV.co evaluation signals
Editorial assessment — not user reviews. Directional, with an explicit confidence level.
| Signal | Assessment |
|---|---|
| Maintenance | Active |
| Documentation | Strong |
| License clarity | Clear |
| Deployment complexity | Low |
| DEV.co fit | Strong |
| Assessment confidence | High |
Ultracite itself is a configuration preset wrapper with no cryptographic, authentication, or data-handling responsibilities. Security posture depends on the underlying linters (ESLint, Biome, Oxlint) and their dependencies. Regular dependency updates are recommended. No specific vulnerabilities or audit data provided; review npm audit output during setup. The `doctor` command may help identify misconfigurations that could weaken code quality checks.
Alternatives to consider
Biome (standalone)
Single Rust-based tool combining formatter and linter with zero-config defaults, but requires manual setup for AI context files and editor integrations that Ultracite abstracts.
ESLint + Prettier (manual config)
Mature ecosystem with largest plugin support and community resources, but demands explicit configuration and lacks AI-agent context generation without additional tooling.
Oxlint (standalone)
Fastest Rust-based linter, but narrower ecosystem compared to ESLint and requires separate formatter (Oxfmt) and manual integration.
Build on ultracite with DEV.co software developers
Ultracite eliminates linting configuration overhead and aligns human and AI-generated code in minutes. Start with `npx ultracite init` or consult our technical team to integrate it into your development workflow.
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ultracite FAQ
Can I use Ultracite with only ESLint, or must I adopt Biome/Oxlint?
Does Ultracite work in monorepos?
What happens if Ultracite releases a breaking change in its presets?
Do I need to regenerate AI context files when I update Ultracite?
Custom software development services
Need help beyond evaluating ultracite? DEV.co is a software development agency offering software development services and web development for teams of every size. Our software developers and web developers build custom software, web applications, APIs, and mcp servers integrations — and maintain them long-term.
Ready to Simplify Code Standards Across Your Team?
Ultracite eliminates linting configuration overhead and aligns human and AI-generated code in minutes. Start with `npx ultracite init` or consult our technical team to integrate it into your development workflow.