import { Content, GoogleGenAI } from '@google/genai';
/**
 * Coding-session-aware context compaction.
 * Summarizes the old portion of the conversation history while preserving
 * key artifacts: file paths touched, errors encountered, fixes applied,
 * and design decisions made. Mimics Claude Code's context sliding-window.
 */
export declare function compactHistory(ai: GoogleGenAI, history: Content[], model?: string, preserveCount?: number): Promise<Content[]>;
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