/**
 * Document Processor - Parse and chunk documents for knowledge learning
 * Supports: PDF, TXT, MD, DOCX, CSV, JSON
 */
export interface DocumentChunk {
    title: string;
    content: string;
    metadata: {
        source: string;
        format: string;
        chunkIndex: number;
        totalChunks?: number;
        page?: number;
    };
}
export interface ProcessedDocument {
    id: string;
    filename: string;
    format: string;
    size: number;
    chunks: DocumentChunk[];
    processedAt: string;
}
export declare class DocumentProcessor {
    /**
     * Process a file buffer into chunks
     */
    process(buffer: Buffer, filename: string): Promise<ProcessedDocument>;
    private parsePDF;
    private parseDOCX;
    private parseCSV;
    private parseCSVLine;
    private parseJSON;
    /**
     * Smart chunking: split by headings/paragraphs, respecting size limits
     */
    private chunkText;
}
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