/**
 * Chunking service - splits text into overlapping chunks for embedding
 */
export interface ChunkResult {
    chunks: string[];
    metadata: {
        total_chars: number;
        total_chunks: number;
        avg_chunk_size: number;
    };
}
export declare class ChunkingService {
    private readonly targetChunkSize;
    private readonly overlapSize;
    constructor(targetChunkSize?: number, // ~600 tokens = ~2400 chars
    overlapSize?: number);
    /**
     * Normalize text before chunking
     * - Remove excessive whitespace
     * - Normalize line breaks
     * - Preserve code structure
     */
    private normalizeText;
    /**
     * Split text into sentences (rough heuristic)
     */
    private splitIntoSentences;
    /**
     * Chunk text with sliding window and overlap
     */
    chunk(text: string): ChunkResult;
    /**
     * Estimate token count (rough: 1 token ≈ 4 chars)
     */
    estimateTokens(text: string): number;
}
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