/**
 * radar-status — overdue/freshness report over all radar sidecars (#1498).
 *
 * Port of corpus/radar_staleness.py: computes staleness for every radar sidecar
 * (shared computeStaleness), sorts most-overdue-first, and renders table / csv /
 * list. on-demand and undatable radars sort last (no overdue).
 *
 * @source historical: corpus/radar_staleness.py
 */
export interface RadarStatusRow {
    refId: string;
    cadence: string;
    lastRefreshed: string;
    /** Whole days since last refresh, or null when undatable. */
    daysSince: number | null;
    /** daysSince − cadence window; null for on-demand/unknown/undatable. */
    overdueDays: number | null;
    isStale: boolean;
    grade: string;
    trajectory: string;
    cluster: string;
}
export type RadarStatusFormat = 'table' | 'csv' | 'list';
export interface RadarStatusOptions {
    /** ISO date as-of (defaults to today, UTC midnight). */
    today?: string;
    /** Only return rows that are overdue. */
    staleOnly?: boolean;
}
/** Compute one status row per radar sidecar, sorted most-overdue-first. */
export declare function radarStatusRows(corpusRoot: string, opts?: RadarStatusOptions): RadarStatusRow[];
/** Render status rows as a markdown table, CSV, or plain list. */
export declare function renderRadarStatus(rows: RadarStatusRow[], format?: RadarStatusFormat): string;
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