import type { AuditRow, GuestUser, Wave } from '../model.js';
export interface ConfigChange {
    at: string;
    by: string;
    section: string | null;
    display: string;
    sites: string[];
}
/**
 * `before`/`between`/`after` hold changes strictly outside every wave span (exclusive bounds);
 * `during` holds changes made on a wave span's own days (inclusive bounds).
 */
export interface Period {
    label: string;
    kind: 'before' | 'during' | 'between' | 'after';
    from: string | null;
    to: string | null;
    bySite: Record<string, ConfigChange[]>;
    shared: ConfigChange[];
}
export interface Asymmetry {
    waveId: string;
    site: string;
    changes: number;
    comparedSite: string;
    comparedChanges: number;
    period: string;
}
export declare function computeConfigDelta(audit: AuditRow[], guests: GuestUser[], waves: Wave[]): {
    periods: Period[];
    asymmetries: Asymmetry[];
};
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