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Ultracite is designed to work out of the box with monorepos. Here’s how to use it with Turborepo.

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Configuration

When initializing Ultracite, it will create the appropriate config file(s) in the root of your repository based on your chosen linter. This configuration applies to your entire monorepo. 
my-turborepo/
├── apps/
├── packages/
├── turbo.json
└── biome.jsonc (or eslint.config.mjs, .oxlintrc.json, etc.)

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Adding scripts

Because Ultracite’s underlying tools are fast (especially the Rust-based Biome and Oxlint), you can run a single root script rather than creating separate scripts in each package. Add the check and fix scripts to your root package.json:
package.json
{
  "scripts": {
    "check": "ultracite check",
    "fix": "ultracite fix"
  }
}
Optionally, add these as root tasks in your turbo.json:
turbo.json
{
  "tasks": {
    "//#check": {},
    "//#fix": {
      "cache": false
    }
  }
}
You can now run turbo run check and turbo run fix from anywhere in your monorepo.