my biome config focused on perf first , readability next

biome.json

{
  "$schema": "https://biomejs.dev/schemas/1.9.4/schema.json",
  "files": {
    "include": [
      "**/*.mjs",
      "**/*.js",
      "**/*.css",
      "**/*.json",
      "**/*.jsx",
      "**/*.njk"
    ],
    "ignore": ["node_modules", ".next", "tmp", "dist"]
  },
  "formatter": {
    "enabled": true,
    "useEditorconfig": true,
    "formatWithErrors": false,
    "indentStyle": "space",
    "indentWidth": 2,
    "lineEnding": "lf",
    "lineWidth": 80,
    "attributePosition": "auto",
    "bracketSpacing": true
  },
  "organizeImports": { "enabled": true },
  "linter": {
    "enabled": false,
    "rules": {
      "recommended": false,
      "complexity": {
        "noExtraBooleanCast": "error",
        "noForEach": "error",
        "noMultipleSpacesInRegularExpressionLiterals": "error",
        "noUselessCatch": "error",
        "noWith": "error",
        "useArrowFunction": "off"
      },
      "correctness": {
        "noConstAssign": "error",
        "noConstantCondition": "error",
        "noEmptyCharacterClassInRegex": "error",
        "noEmptyPattern": "error",
        "noGlobalObjectCalls": "error",
        "noInvalidBuiltinInstantiation": "error",
        "noInvalidConstructorSuper": "error",
        "noNonoctalDecimalEscape": "error",
        "noPrecisionLoss": "error",
        "noSelfAssign": "error",
        "noSetterReturn": "error",
        "noSwitchDeclarations": "error",
        "noUndeclaredVariables": "error",
        "noUnreachable": "error",
        "noUnreachableSuper": "error",
        "noUnsafeFinally": "error",
        "noUnsafeOptionalChaining": "error",
        "noUnusedLabels": "error",
        "noUnusedPrivateClassMembers": "error",
        "noUnusedVariables": "error",
        "useIsNan": "error",
        "useValidForDirection": "error",
        "useYield": "error"
      },
      "style": { "useBlockStatements": "error", "useForOf": "warn" },
      "suspicious": {
        "noAssignInExpressions": "error",
        "noAsyncPromiseExecutor": "error",
        "noCatchAssign": "error",
        "noClassAssign": "error",
        "noCompareNegZero": "error",
        "noControlCharactersInRegex": "error",
        "noDebugger": "error",
        "noDuplicateCase": "error",
        "noDuplicateClassMembers": "error",
        "noDuplicateObjectKeys": "error",
        "noDuplicateParameters": "error",
        "noEmptyBlockStatements": "error",
        "noFallthroughSwitchClause": "error",
        "noFunctionAssign": "error",
        "noGlobalAssign": "error",
        "noImportAssign": "error",
        "noMisleadingCharacterClass": "error",
        "noPrototypeBuiltins": "error",
        "noRedeclare": "error",
        "noShadowRestrictedNames": "error",
        "noSparseArray": "error",
        "noUnsafeNegation": "error",
        "useGetterReturn": "error",
        "useValidTypeof": "error"
      }
    }
  },
  "javascript": {
    "jsxRuntime": "transparent",
    "formatter": {
      "jsxQuoteStyle": "double",
      "quoteProperties": "asNeeded",
      "trailingCommas": "es5",
      "semicolons": "asNeeded",
      "arrowParentheses": "asNeeded",
      "bracketSameLine": false,
      "quoteStyle": "single",
      "attributePosition": "auto",
      "bracketSpacing": true
    },
    "globals": ["exports"]
  }
}