/**
 * Scroll Collector — tracks scroll position with throttling.
 * Captures: scrollY, velocity, direction reversals, pauses, max depth.
 */
import type { TelemetryEvent } from '../types.js';
export declare function startScrollTracking(push: (event: TelemetryEvent) => void): void;
export declare function stopScrollTracking(): void;
export declare function getScrollStats(): {
    reversalCount: number;
    maxDepth: number;
    pauseCount: number;
};
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