/**
 * Chunking - Text chunking utilities for RAG
 */
export type ChunkStrategy = 'size' | 'sentence' | 'paragraph' | 'semantic';
export interface ChunkingConfig {
    chunkSize?: number;
    overlap?: number;
    strategy?: ChunkStrategy;
    separator?: string;
}
export interface Chunk {
    content: string;
    index: number;
    startOffset: number;
    endOffset: number;
    metadata?: Record<string, any>;
}
/**
 * Chunking class for splitting text into chunks
 */
export declare class Chunking {
    private chunkSize;
    private overlap;
    private strategy;
    private separator;
    constructor(config?: ChunkingConfig);
    /**
     * Chunk text based on configured strategy
     */
    chunk(text: string): Chunk[];
    /**
     * Chunk by fixed size with overlap
     */
    chunkBySize(text: string): Chunk[];
    /**
     * Chunk by sentences
     */
    chunkBySentence(text: string): Chunk[];
    /**
     * Chunk by paragraphs
     */
    chunkByParagraph(text: string): Chunk[];
    /**
     * Chunk by semantic boundaries (simplified)
     */
    chunkBySemantic(text: string): Chunk[];
    /**
     * Merge small chunks
     */
    mergeSmallChunks(chunks: Chunk[], minSize?: number): Chunk[];
}
/**
 * Create a Chunking instance
 */
export declare function createChunking(config?: ChunkingConfig): Chunking;