export type HealthStatus = 'healthy' | 'degraded' | 'unavailable' | 'failed';
export interface HealthCheckResult {
    name: string;
    status: HealthStatus;
    source: string;
    measuredAt: number;
    detail: string;
    value?: number;
    threshold?: number;
    oldestAgeMs?: number;
    errorCategory?: string;
}
export interface HealthSnapshot {
    version: 1;
    status: HealthStatus;
    measuredAt: number;
    checks: HealthCheckResult[];
}
export declare function aggregateHealthStatus(checks: readonly HealthCheckResult[]): HealthStatus;
export declare function createHealthSnapshot(checks: HealthCheckResult[], measuredAt?: number): HealthSnapshot;
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