import type { SessionRecord } from "./sessions.js";
export interface ModelStat {
    model: string;
    count: number;
    costUsd: number;
}
export interface SessionStats {
    count: number;
    totalCostUsd: number;
    totalSources: number;
    totalRounds: number;
    deepRuns: number;
    avgSourcesPerSession: number;
    byModel: ModelStat[];
    oldest?: number;
    newest?: number;
}
export declare function aggregateSessionStats(records: SessionRecord[]): SessionStats;
export declare function renderStats(stats: SessionStats): string;
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