import { type Browser, type Page } from "puppeteer-core";
/**
 * Get or create a shared browser instance.
 * Reuses the same browser across multiple tool calls for efficiency.
 */
export declare function getBrowser(): Promise<Browser>;
/**
 * Create a new page with the given viewport settings.
 */
export declare function createPage(width: number, height: number, deviceScaleFactor?: number): Promise<Page>;
/**
 * Navigate to a URL and wait for the page to be ready.
 */
export declare function navigateAndWait(page: Page, url: string, delay?: number): Promise<void>;
/**
 * Close a page safely.
 */
export declare function closePage(page: Page): Promise<void>;
/**
 * Shut down the shared browser instance.
 */
export declare function closeBrowser(): Promise<void>;
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