import type { Message } from '../core/types';
export interface CompressorConfig {
    maxTokens: number;
    compressThreshold: number;
    preserveRecent: number;
    brain?: any;
}
export interface CompressResult {
    messages: Message[];
    learnedCount: number;
    savedTokens: number;
    summary: string;
}
/**
 * Context compression with optional DeepBrain memory offloading.
 */
export declare class ContextCompressor {
    private config;
    constructor(config?: Partial<CompressorConfig>);
    /**
     * Estimate token count using language-aware heuristic.
     * English: ~1 token per 4 chars. Chinese: ~1 token per 2 chars.
     */
    estimateTokens(text: string): number;
    private estimateMessagesTokens;
    /**
     * Extract key insights from messages for brain storage.
     */
    private extractInsights;
    /**
     * Generate a simple summary from messages (no-brain fallback).
     */
    private summarize;
    /**
     * Compress messages when token count exceeds threshold.
     */
    compress(messages: Message[], config?: Partial<CompressorConfig>): Promise<CompressResult>;
    /**
     * Restore context from brain for a given query.
     */
    restore(query: string, brain: any): Promise<string[]>;
}
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