/**
 * Pattern Evictor - Smart deletion with protection rules
 *
 * Evicts low-scoring patterns while protecting important ones
 */
import type { Phase, EvictionResult } from '../types/pattern.js';
import type { PatternConfig } from '../types/config.js';
export declare class PatternEvictor {
    /**
     * Evict patterns if count exceeds maximum for a phase
     */
    evictIfNeeded(phase: Phase, config: PatternConfig): Promise<EvictionResult>;
    /**
     * Mark patterns that should be protected from eviction
     */
    private markProtected;
    /**
     * Check if pattern is a cluster representative
     */
    private isClusterRepresentative;
    /**
     * Get days since a timestamp
     */
    private getDaysSince;
}
/**
 * Export singleton instance
 */
export declare const patternEvictor: PatternEvictor;
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