/**
 * QQ 处理器工具函数
 *
 * 从 qq.ts 提取的模块级纯函数。
 */
import type { PermissionDecision } from './qq-types.js';
export declare function extractExtension(name: string): string;
export declare function normalizeExtension(ext: string): string;
export declare function extensionFromContentType(contentType: string): string;
export declare function mimeFromExtension(ext: string): string;
export declare function sanitizeFilename(name: string): string;
export declare function parsePermissionDecision(raw: string): PermissionDecision | null;
export declare function buildQQCmdInput(text: string, show?: string): string;
export declare function getQQHelpText(): string;
export declare function getQQHelpMarkdown(): string;
//# sourceMappingURL=qq-utils.d.ts.map