import { ChromeSummarizer, ModelAvailability, PdfSummarizerOptions } from "./types";
/**
 * Allows consumer to get the latest download progress value.
 */
export declare function getDownloadProgress(): number;
/**
 * Allows consumer to set a callback function to receive real-time progress updates.
 */
export declare function onDownloadProgressUpdate(callback: (progress: number) => void): void;
/**
 * Checks if Chrome's built-in Summarizer API is available
 *
 * @returns boolean indicating if the API is available
 */
export declare function isSummarizerSupported(): boolean;
/**
 * Checks the availability status of the Chrome Summarizer model
 */
export declare function checkModelAvailability(): Promise<ModelAvailability>;
/**
 * Validates user activation requirement for Chrome AI APIs
 */
export declare function validateUserActivation(): void;
/**
 * Creates a Chrome Summarizer instance with the specified configuration
 * and tracks download progress.
 */
export declare function createSummarizer(options: PdfSummarizerOptions): Promise<ChromeSummarizer>;