import type { SessionSummary } from "./types";
/**
 * Generate a human-readable token usage and cost report from session summaries.
 *
 * Sections:
 * 1. Overall Totals — aggregate metrics across all sessions
 * 2. Per-Agent Breakdown — grouped by agentName, sorted by total cost
 * 3. Top 5 Costliest Sessions — most expensive individual sessions
 */
export declare function generateTokenReport(summaries: SessionSummary[]): string;
/**
 * Convenience function: read summaries from disk and generate the report.
 */
export declare function getTokenReport(directory: string): string;