import type { ISOTimestamp } from '../../types';
/**
 * Session start trigger types.
 */
export type SessionTrigger = 'startup' | 'resume' | 'compact' | 'clear';
/**
 * Event emitted when a session starts.
 */
export interface ISessionStartEvent {
    readonly type: 'session:start';
    readonly trigger: SessionTrigger;
    readonly timestamp: ISOTimestamp;
    readonly sessionId?: string;
}
/**
 * Create a session start event.
 */
export declare function createSessionStartEvent(trigger: SessionTrigger, timestamp: ISOTimestamp, sessionId?: string): ISessionStartEvent;
//# sourceMappingURL=ISessionStartEvent.d.ts.map