import { Counter, type Labels } from './metrics-counter.js';
import { Histogram } from './metrics-histogram.js';
import { Gauge, type GaugeSeries } from './metrics-gauge.js';
import { RingBuffer } from './metrics-ringbuffer.js';
export declare class MetricsRegistry {
    private counters;
    private histograms;
    private gauges;
    private rings;
    private enabled;
    counter(name: string, help: string): Counter;
    histogram(name: string, help: string, buckets?: number[]): Histogram;
    gauge(name: string, help: string, collect: () => GaugeSeries[]): Gauge;
    ringBuffer<T>(name: string, capacity: number): RingBuffer<T>;
    setEnabled(v: boolean): void;
    isEnabled(): boolean;
    reset(): void;
    format(): string;
    toJSON(): {
        counters: Array<{
            name: string;
            help: string;
            series: Array<{
                labels: Labels;
                value: number;
            }>;
        }>;
        histograms: Array<{
            name: string;
            help: string;
            series: Array<{
                labels: Labels;
                count: number;
                sum: number;
                cumulativeCounts: number[];
            }>;
        }>;
        gauges: Array<{
            name: string;
            help: string;
            series: Array<{
                labels: Labels;
                value: number;
            }>;
        }>;
        rings: Array<{
            name: string;
            size: number;
            capacity: number;
            items: unknown[];
        }>;
    };
}
export declare const metrics: MetricsRegistry;
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