import type { PackageJson } from 'type-fest';
import { type CliArgs, type ConfigFileFormat } from './types.js';
/** Resolves config file format from CLI arg, auto-detection, or interactive prompt. */
export declare function promptConfigFormat(targetDir: string, { 'config-format': format, yes }: CliArgs): Promise<ConfigFileFormat>;
export declare function resolveFilename(baseName: string, format: ConfigFileFormat, isEsm: boolean): string;
export declare function readPackageJson(targetDir: string): Promise<PackageJson>;