Biome Config File

biome.json

{
	"$schema": "https://biomejs.dev/schemas/1.9.4/schema.json",
	"vcs": {
		"enabled": false,
		"clientKind": "git",
		"useIgnoreFile": false
	},
	"files": {
		"ignoreUnknown": false,
		"ignore": []
	},
	"formatter": {
		"enabled": true,
		"indentStyle": "tab"
	},
	"organizeImports": {
		"enabled": true
	},
	"linter": {
		"enabled": true,
		"rules": {
			"recommended": false,
			"complexity": {
				"noUselessConstructor": "warn",
				"noUselessTernary": "warn"
			},
			"correctness": {
				"noConstAssign": "error",
				"noInvalidConstructorSuper": "error",
				"noUndeclaredVariables": "error",
				"noUnreachableSuper": "error",
				"noUnusedVariables": "warn",
				"useYield": "warn"
			},
			"style": {
				"noArguments": "warn",
				"noVar": "warn",
				"useBlockStatements": "warn",
				"useCollapsedElseIf": "warn",
				"useSingleVarDeclarator": "warn",
				"useTemplate": "warn"
			},
			"suspicious": {
				"noClassAssign": "warn",
				"noDoubleEquals": "warn",
				"noGlobalAssign": "warn",
				"useAwait": "warn"
			}
		}
	},
	"javascript": {
		"globals": [
			"$",
			"jQuery"
		],
		"formatter": {
			"quoteStyle": "single",
			"semicolons": "asNeeded"
		}
	},
	"overrides": [
		{
			"include": [
				"**/*.svelte"
			],
			"linter": {
				"rules": {
					"correctness": {
						"noUnusedVariables": "off"
					},
					"style": {
						"useSingleVarDeclarator": "off"
					}
				}
			}
		}
	]
}

Turns off some rules for Svelte files