export type DiagnosticsLevel = 'debug' | 'info' | 'warn' | 'error';
export interface DiagnosticsTimelineRow {
    timestamp: number;
    platform: 'ios' | 'android';
    layer: 'native' | 'js';
    level: DiagnosticsLevel;
    event: string;
    data?: Record<string, unknown>;
}
/**
 * DiagnosticsEngine
 * - JS-side structured timeline (for explainability)
 * - Mirrors important lifecycle events even when native logs are unavailable
 *
 * Native already persists/returns diagnostics via `getDiagnostics()`; this engine
 * adds a JS timeline overlay and a single merge point for consumers.
 */
declare class DiagnosticsEngine {
    private jsTimeline;
    private maxRows;
    log(level: DiagnosticsLevel, event: string, data?: Record<string, unknown>): void;
    getTimeline(): Promise<DiagnosticsTimelineRow[]>;
    clearJsTimeline(): void;
}
export declare const diagnosticsEngine: DiagnosticsEngine;
export default diagnosticsEngine;
//# sourceMappingURL=DiagnosticsEngine.d.ts.map