/**
 * OMK Theme — Metrics panels, gauges, and system usage
 * Extracted from util/theme.ts to break God Module coupling
 */
export declare function metricsPanel(lines: string[], title?: string): string;
export declare function metricsGauge(label: string, value: number, max: number, width?: number): string;
export declare function metricsGradient(text: string): string;
export declare function metricsHeader(text: string): string;
export declare function metricsStat(label: string, value: string, unit?: string): string;
export declare function metricsMatrixHeader(text: string): string;
/** Get system usage snapshot */
export declare function getSystemUsage(): {
    cpuPercent: number;
    memUsedGB: number;
    memTotalGB: number;
    memPercent: number;
    loadAvg: number[];
    heapUsedMB: number;
    heapTotalMB: number;
    heapExternalMB: number;
    eventLoopLagMs: number;
    uptimeSeconds: number;
};
