#!/usr/bin/env node
import { type DomainAggregate, type TierSlotName } from "../domain-stats.js";
export interface GaugeData {
    domains_tracked: number;
    domains_failing: number;
    tier_success_ratio: Array<{
        tier: TierSlotName;
        ratio: number;
    }>;
}
/** Pure: derive gauge values from an aggregate. */
export declare function deriveGauges(agg: DomainAggregate): GaugeData;
/**
 * Emit the gauges via a self-contained MeterProvider, force-flushing before
 * shutdown so a short-lived run exports. No-op (returns false) when
 * OTEL_EXPORTER_OTLP_ENDPOINT is unset. Best-effort — logs and returns false on
 * any OTel error rather than failing the snapshot half of the job.
 */
export declare function emitGauges(data: GaugeData): Promise<boolean>;
export interface MaintenanceResult {
    count: number;
    snapshotPath: string;
    pruned: number;
    gaugesEmitted: boolean;
    truncated: boolean;
    aggregate: DomainAggregate;
}
export interface MaintenanceOptions {
    snapshotDir?: string;
    retention?: number;
}
/** Run one maintenance pass: SCAN → gauges + snapshot + prune. */
export declare function runMaintenance(opts?: MaintenanceOptions): Promise<MaintenanceResult>;
export declare function main(): Promise<number>;