/**
 * Handles auto-start functionality for the AI assistant using URL parameters.
 *
 * Example URLs:
 * - `https://example.com?sista_ai=start` - Starts a new session
 * - `https://example.com?sista_ai=start&sista_id=SESSION_ID` - Continues an existing session
 *
 * When these parameters are present in the URL, the AI assistant will automatically start.
 * This class also provides functionality to append these parameters to any URL.
 */
export declare class UrlStartupHandler {
    private static instance;
    private static readonly START_PARAM_KEY;
    private static readonly SESSION_PARAM_KEY;
    private constructor();
    static getInstance(): UrlStartupHandler;
    checkForUrlStartQueryParams(): {
        shouldStart: boolean;
        sessionId?: string;
    };
    AppendUrlStartQueryParamsToAnyURL(href: string): string;
}