import type { ResponseMetadata } from '../../agent/types/message-types.js';
import type { AgentModelInput } from '../../agent/types.js';
import type { SessionStats, ToolEvent, TurnRecord } from './types.js';
export declare function createSessionStats(model: AgentModelInput): SessionStats;
export declare function resetStats(stats: SessionStats): void;
export declare function recordTurn(stats: SessionStats, userInput: string, assistantText: string, metadata: ResponseMetadata | undefined, toolEvents?: ToolEvent[]): TurnRecord;