/**
 * Enricher - Add embeddings and tags to patterns
 */
import type { MetaPattern } from '../core/schema.js';
/**
 * Compute TF-IDF based embedding (simple version)
 *
 * @param text - Text to embed
 * @returns Embedding vector
 */
export declare function computeSimpleEmbedding(text: string): number[];
/**
 * Extract tags from pattern content
 *
 * @param pattern - Pattern
 * @returns Array of tags
 */
export declare function extractTags(pattern: MetaPattern): string[];
/**
 * Enrich pattern with embedding and tags
 *
 * @param pattern - Pattern to enrich
 * @returns Enriched pattern
 */
export declare function enrichPattern(pattern: MetaPattern): MetaPattern;
/**
 * Enrich multiple patterns
 *
 * @param patterns - Patterns to enrich
 * @returns Enriched patterns
 */
export declare function enrichPatterns(patterns: MetaPattern[]): MetaPattern[];
/**
 * Compute cosine similarity between two embedding vectors
 *
 * @param a - Vector A
 * @param b - Vector B
 * @returns Similarity score [0, 1]
 */
export declare function cosineSimilarity(a: number[], b: number[]): number;
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