biome.json

{
  "$schema": "./node_modules/@biomejs/biome/configuration_schema.json",
  "vcs": { "enabled": false, "clientKind": "git", "useIgnoreFile": true },
  "files": {
    "includes": ["src/**", "*.ts", "*.json", "!src/data/expressions.ts"]
  },
  "formatter": {
    "enabled": true,
    "indentStyle": "space",
    "indentWidth": 2,
    "lineWidth": 80
  },
  "linter": {
    "enabled": true,
    "rules": {
      "preset": "recommended",
      "correctness": {
        "noUnusedImports": "error",
        "noUnusedVariables": "error"
      },
      "style": {
        "useConst": "error",
        "useImportType": "error"
      },
      "suspicious": {
        "noExplicitAny": "error"
      }
    }
  },
  "javascript": {
    "formatter": {
      "quoteStyle": "double",
      "trailingCommas": "all",
      "semicolons": "always"
    }
  }
}