/**
 * Shared research-corpus cadence + staleness config (#1498, #1502).
 *
 * Single source of truth for refresh-cadence → window math. Consumed by:
 *  - renderers.ts `radar-stale-queue` view (#1492)
 *  - the radar subsystem: radar-init GRADE→cadence default, radar-status (#1498)
 *  - the profile subsystem: profile-status staleness (#1502)
 *
 * Ports `corpus/radar_staleness.py` CADENCE_DAYS, `corpus/radar_init.py`
 * CADENCE_BY_GRADE, and `profiles/find_stale_profiles.py`'s cadence map into one
 * module so the date-math lives in exactly one place — the explicit #1498/#1502
 * "one staleness helper" requirement.
 *
 * @source historical: corpus/radar_staleness.py, corpus/radar_init.py
 */
/**
 * Refresh-cadence enum word → staleness window in days.
 *
 * `null` = on-demand: never auto-overdue. `biennial` is accepted as a synonym
 * for `biannual` (180d); both spellings appear in corpus sidecars. The Python
 * sources used distinct on-demand sentinels (radar_staleness: None;
 * find_stale_profiles: 9999) — both mean "never auto-stale", normalized to
 * `null` here.
 */
export declare const CADENCE_DAYS: Record<string, number | null>;
/**
 * Default refresh cadence by GRADE letter (radar-init scaffold default).
 * A→quarterly, B/C→biannual, D→on-demand. Ports `radar_init.py` CADENCE_BY_GRADE.
 */
export declare const CADENCE_BY_GRADE: Record<string, string>;
/**
 * Look up the staleness window for a cadence word.
 * Returns `null` for on-demand and `undefined` for an unknown/absent cadence —
 * callers distinguish "never stale" (null) from "can't tell" (undefined).
 */
export declare function cadenceWindowDays(cadence: string | null | undefined): number | null | undefined;
/** Default cadence for a GRADE letter; falls back to `biannual` for unknown/absent grades. */
export declare function cadenceForGrade(grade: string | null | undefined): string;
/**
 * Default affiliation canonicalization map (#1503): canonical `PROF-O-{slug}`
 * → variant org-name strings that should resolve to it. Ports
 * `corpus/normalize_affiliation.py` CANONICAL_MAP. Per epic #1496 principle #3
 * (externalize hardcoded data), this default is overridable per-corpus via a
 * `documentation/profiles/orgs/affiliation-map.yaml` data file (loaded by the
 * sidecar-repair tool); this module keeps only the pure default + reverse-map
 * builder so it stays dependency-free.
 */
export declare const DEFAULT_AFFILIATION_MAP: Record<string, string[]>;
/**
 * Reverse a canonical map (slug → variants) into variant-name → slug, plus
 * self-mapping each slug. All keys lowercased/trimmed for direct lookup.
 */
export declare function buildAffiliationReverse(map: Record<string, string[]>): Map<string, string>;
export interface Staleness {
    /** Whole days between `lastRefreshed` and `today` (UTC), or null when undatable. */
    daysSince: number | null;
    /** Cadence window in days; null = on-demand; undefined = unknown cadence word. */
    windowDays: number | null | undefined;
    /** `daysSince − windowDays`; null when not computable (on-demand / unknown / bad date). */
    overdueDays: number | null;
    /** True iff overdueDays is a positive number. */
    isStale: boolean;
}
/**
 * Compute staleness for a `refresh-cadence` + `last-refreshed` ISO date as of
 * `today`. Mirrors `radar_staleness.compute_staleness`: whole-day floor,
 * UTC-midnight anchoring, and on-demand / unknown-cadence / undatable inputs all
 * yield `overdueDays === null` (not stale).
 *
 * `today` should be a UTC-midnight Date (e.g. `new Date('2026-05-26T00:00:00Z')`)
 * so day deltas are exact.
 */
export declare function computeStaleness(cadence: string | null | undefined, lastRefreshed: string | null | undefined, today: Date): Staleness;
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