/**
 * Session Utility Functions
 *
 * Helper utilities for session commands including duration formatting,
 * statistics calculation, and ticket number formatting.
 */
import type { Session, SessionStats } from './types.js';
/**
 * Format duration from ISO timestamp to human readable
 */
export declare function formatDuration(startedAt: string, endedAt?: string): string;
/**
 * Format duration from milliseconds
 */
export declare function formatDurationMs(ms: number): string;
/**
 * Calculate session statistics
 */
export declare function calculateSessionStats(session: Session): SessionStats;
/**
 * Format ticket number as TKT-XXX
 */
export declare function formatTicketNumber(num: number): string;
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