/**
 * Hybrid search engine for contexts (keyword + semantic)
 * Phase 2: ML Intelligence Layer
 */
import type { Context, SearchFilters } from './types/context.js';
import type { IContextStorage } from './interfaces/context-storage.js';
export declare class SearchEngine {
    private store;
    private vectorStore;
    private embedder;
    constructor(store: IContextStorage);
    /**
     * Index a context for semantic search
     */
    indexContext(context: Context): Promise<void>;
    /**
     * Hybrid search (keyword + semantic)
     */
    search(query: string, filters?: SearchFilters): Promise<Context[]>;
    /**
     * Semantic search
     */
    private semanticSearch;
    /**
     * Merge keyword and semantic results
     */
    private mergeResults;
    /**
     * Remove context from search index
     */
    removeFromIndex(contextId: string): Promise<void>;
}
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