/**
 * Horizontal Evolution - Evolve across sessions
 *
 * Takes fragments from the last N sessions and evolves them into
 * a compressed current state. The window naturally prevents crud
 * buildup - old sessions age out, no algorithmic pruning needed.
 */
import type { AllFragments } from './schemas.js';
export interface SessionSnapshot {
    sessionId: string;
    timestamp: Date;
    fragments: AllFragments;
}
export interface HorizontalEvolutionConfig {
    apiKey: string;
    baseUrl?: string;
    model?: string;
    windowSize?: number;
    currentFragments?: AllFragments;
    timeoutMs?: number;
    externalFragments?: Array<{
        projectName: string;
        fragments: AllFragments;
    }>;
}
export interface HorizontalEvolutionResult {
    current: AllFragments;
    tokensUsed: number;
    sessionsIncluded: number;
    musings?: string;
}
/**
 * Perform horizontal evolution across session snapshots
 */
export declare function evolveHorizontal(snapshots: SessionSnapshot[], config: HorizontalEvolutionConfig): Promise<HorizontalEvolutionResult>;
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