/**
 * Normalize host-framework query objects into VextRequest.query.
 *
 * Public contract: `Record<string, string>`.
 * Multi-value keys collapse to the **first** string value so native,
 * express, fastify, hono, and koa adapters share identical semantics.
 */
export declare function flattenQueryRecord(query: unknown): Record<string, string>;
/**
 * Parse a raw query string with first-wins multi-value semantics.
 */
export declare function parseQueryString(rawQueryString: string): Record<string, string>;