/**
 * Core Index Module
 *
 * Language-agnostic text search using:
 * - Regex-based symbol extraction
 * - BM25 keyword matching
 * - Line-based chunking
 *
 * Index location: .raggrep/index/core/
 *
 * This module provides fast, deterministic search without embeddings.
 * It complements language-specific modules by catching symbol matches.
 */
import { IndexModule, IndexContext, SearchContext, SearchOptions } from "../../types";
import type { FileIndex, SearchResult, ModuleConfig } from "../../domain/entities";
import { type ExtractedSymbol } from "./symbols";
/**
 * Core module-specific data stored with file index
 */
export interface CoreModuleData {
    /** Extracted symbols */
    symbols: ExtractedSymbol[];
    /** BM25 tokens for this file */
    tokens: string[];
    [key: string]: unknown;
}
export declare class CoreModule implements IndexModule {
    readonly id = "core";
    readonly name = "Core Search";
    readonly description = "Language-agnostic text search with symbol extraction";
    readonly version = "1.0.0";
    /**
     * Core module accepts all files (it's the fallback).
     */
    supportsFile(_filepath: string): boolean;
    private symbolIndex;
    private bm25Index;
    private rootDir;
    initialize(_config: ModuleConfig): Promise<void>;
    /**
     * Index a single file.
     */
    indexFile(filepath: string, content: string, ctx: IndexContext): Promise<FileIndex | null>;
    /**
     * Create line-based chunks from content.
     */
    private createChunks;
    /**
     * Convert symbol type to chunk type.
     */
    private symbolTypeToChunkType;
    /**
     * Finalize indexing - build BM25 index and save symbol index.
     */
    finalize(ctx: IndexContext): Promise<void>;
    /**
     * Search the index.
     */
    search(query: string, ctx: SearchContext, options?: SearchOptions): Promise<SearchResult[]>;
    /**
     * Find symbol name matches for query tokens.
     */
    private findSymbolMatches;
    /**
     * Find the best matching chunk based on query tokens.
     */
    private findBestChunk;
    /**
     * Load the symbol index from disk.
     */
    private loadSymbolIndex;
    dispose(): Promise<void>;
}