import { IContextOptimizer, ConversationMessage, ContextMetrics } from '../types';
/**
 * Optimizer that summarizes messages when token count is too high
 */
export declare class SummarizationOptimizer implements IContextOptimizer {
    private summarizationEngine;
    private tokenMetric;
    constructor();
    shouldOptimize(metrics: ContextMetrics): boolean;
    optimize(messages: ConversationMessage[]): Promise<ConversationMessage[]>;
}