import type { Browser, Page } from 'playwright';
import { z } from 'zod';
import type { StagehandConfig } from '../../../types/browser/browser';
export declare class StagehandError extends Error {
    readonly details?: any;
    constructor(message: string, details?: any);
}
export declare class ActionError extends StagehandError {
    constructor(message: string, details?: any);
}
export declare class ExtractionSchemaError extends StagehandError {
    constructor(message: string, details?: any);
}
export declare class ObservationError extends StagehandError {
    constructor(message: string, details?: any);
}
export declare class NavigationError extends StagehandError {
    constructor(message: string, details?: any);
}
export declare class PlaywrightError extends StagehandError {
    constructor(message: string, details?: any);
}
export declare function initializeBrowser(options?: {
    headless?: boolean;
    timeout?: number;
}): Promise<{
    browser: Browser;
    page: Page;
}>;
export declare function loadBrowserConfig(): StagehandConfig;
export declare function loadSchema(schemaPath: string | object): Promise<z.ZodType<any>>;
export declare function formatOutput<T>(result: T, debug?: boolean): string;
export declare function handleBrowserError(error: unknown, debug?: boolean): string;