Biome shared config

Open Region shared configuration for Biome.

This package replaces @openregion/eslint-config and @openregion/prettier-config for projects that are ready to move to Biome. It is a new recommended baseline, not a rule-for-rule migration of the previous ESLint, Airbnb, React, TypeScript ESLint, JSX accessibility, or Prettier settings.

Installation

npm install --save-dev @biomejs/biome @openregion/biome-config

Usage

Create biome.json in the project root:

{
  "extends": ["@openregion/biome-config"]
}

Add scripts to the consumer project's package.json:

{
  "scripts": {
    "check": "biome check .",
    "format": "biome check --write .",
    "ci": "biome ci ."
  }
}

Included baseline

• Biome formatter.
• Biome recommended linter rules.
• Import organization through Biome assist actions.
• Git ignore integration.
• Conservative Open Region defaults for JavaScript and TypeScript projects.

Migration from Open Region ESLint and Prettier configs

Remove the old packages:

npm uninstall @openregion/eslint-config @openregion/prettier-config eslint prettier

Install Biome and the shared config:

npm install --save-dev @biomejs/biome @openregion/biome-config

Add biome.json:

{
  "extends": ["@openregion/biome-config"]
}

When the project is ready to apply formatting and safe fixes, run:

npx biome check --write .

Review the resulting diff before committing. Biome formatter output can differ from Prettier, and recommended lint rules can surface findings that were not covered by the old shared configs.

Local package checks

npm run check
npm run ci
npm run pack:dry-run