import { type BrowserCandidate, type BrowserKey, type HelperTimeoutState, type LaunchAttempt } from '../browser/launch';
import { browserCandidates, composeLaunchFailure, selectBrowserCandidates } from '../browser/launch';
export { browserCandidates, composeLaunchFailure, selectBrowserCandidates };
export type { BrowserCandidate, BrowserKey, LaunchAttempt, HelperTimeoutState };
export type CapturePose = {
    position: [number, number, number];
    lookAt?: [number, number, number];
    fov?: number;
};
export type CaptureScreenshotsOptions = {
    directory: string;
    outDir: string;
    shots?: string[];
    width?: number;
    height?: number;
    preview?: boolean;
    timeoutMs?: number;
    blindMs?: number;
    pose?: CapturePose;
    /** Diagnostic override: launch only this candidate, no fallback (default: try the whole chain). */
    browser?: BrowserKey;
    onProgress?: (message: string) => void;
};
export type CaptureScreenshotsResult = {
    written: string[];
    declaredShots: string[];
};
export declare function composeTimeoutDiagnosis(state: HelperTimeoutState, errors: string[]): string;
export declare function captureScreenshots(opts: CaptureScreenshotsOptions): Promise<CaptureScreenshotsResult>;