/**
 * Register a counter metric
 */
export declare function registerCounter(name: string, help: string): void;
/**
 * Increment a counter
 */
export declare function incCounter(name: string, labels?: Record<string, string>, value?: number): void;
/**
 * Register a gauge metric
 */
export declare function registerGauge(name: string, help: string): void;
/**
 * Set a gauge value
 */
export declare function setGauge(name: string, value: number, labels?: Record<string, string>): void;
/**
 * Register a histogram metric
 */
export declare function registerHistogram(name: string, help: string, buckets?: number[]): void;
/**
 * Observe a histogram value
 */
export declare function observeHistogram(name: string, value: number, labels?: Record<string, string>): void;
/**
 * Export all metrics in Prometheus text format
 */
export declare function exportMetrics(): string;
/**
 * Reset all metrics (useful for testing)
 */
export declare function resetMetrics(): void;
export declare function initializeMetrics(): void;
export declare const metrics: {
    syncSuccess: (certName: string) => void;
    syncFailure: (certName: string, reason: string) => void;
    syncDuration: (certName: string, durationMs: number) => void;
    wsConnected: () => void;
    wsDisconnected: () => void;
    wsReconnect: () => void;
    apiRequest: (method: string, status: number, durationMs: number) => void;
    setCertsTracked: (count: number) => void;
    setCertExpiry: (certId: string, certName: string, days: number) => void;
    secretDeployed: (secretName: string, success: boolean, durationMs: number) => void;
    setSecretsTracked: (count: number) => void;
    updateCheck: (status: "success" | "error") => void;
    updateInstall: (status: "success" | "error" | "permission_denied") => void;
    setVersionInfo: (version: string, channel: string) => void;
};
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