/**
 * Pattern Clusterer - Hierarchical Agglomerative Clustering
 *
 * Groups similar patterns together to reduce duplication
 */
import type { Cluster, Phase } from '../types/pattern.js';
import type { PatternConfig } from '../types/config.js';
export declare class PatternClusterer {
    /**
     * Cluster patterns for a given phase
     */
    clusterPatterns(phase: Phase, config: PatternConfig): Promise<Cluster[]>;
    /**
     * Find the two most similar clusters
     */
    private findMostSimilar;
    /**
     * Compute similarity between two clusters (centroid-based)
     */
    private clusterSimilarity;
    /**
     * Merge cluster2 into cluster1
     */
    private mergeClusters;
    /**
     * Compute centroid as average of all pattern embeddings
     */
    private computeCentroid;
    /**
     * Compute coherence (average pairwise similarity within cluster)
     */
    private computeCoherence;
}
/**
 * Export singleton instance
 */
export declare const patternClusterer: PatternClusterer;
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