/**
 * Deduplication Algorithm - TF-IDF based fuzzy matching
 *
 * Merges very similar patterns (>0.9 similarity) to reduce redundancy.
 */
import type { MetaPattern } from '../core/schema.js';
/**
 * Compute TF-IDF similarity between two texts
 *
 * @param text1 - First text
 * @param text2 - Second text
 * @returns Similarity score [0, 1]
 */
export declare function computeTfIdfSimilarity(text1: string, text2: string): number;
/**
 * Deduplicate patterns by merging similar ones
 *
 * @param patterns - Patterns to deduplicate
 * @param threshold - Similarity threshold (default 0.9)
 * @returns Deduplicated patterns
 */
export declare function deduplicatePatterns(patterns: MetaPattern[], threshold?: number): MetaPattern[];
/**
 * Find duplicate patterns (for analysis)
 *
 * @param patterns - Patterns to analyze
 * @param threshold - Similarity threshold
 * @returns Groups of duplicate patterns
 */
export declare function findDuplicates(patterns: MetaPattern[], threshold?: number): MetaPattern[][];
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