/**
 * Knowledge base service for CRUD operations
 * Manages knowledge base metadata, statistics, and lifecycle operations
 */
import type { KnowledgeBaseMetadata, KnowledgeBaseStats, Config } from '../../shared/types/index.js';
import { LanceDBClientWrapper } from '../../infrastructure/lancedb/lancedb.client.js';
/**
 * Error thrown when knowledge base operations fail
 */
export declare class KnowledgeBaseError extends Error {
    cause?: unknown | undefined;
    constructor(message: string, cause?: unknown | undefined);
}
/**
 * Service for managing knowledge bases
 */
export declare class KnowledgeBaseService {
    private lanceClient;
    constructor(lanceClient: LanceDBClientWrapper, _config: Config);
    /**
     * Create an empty knowledge base
     * Creates a table with a placeholder record so the KB exists
     */
    createKnowledgeBase(name: string): Promise<void>;
    /**
     * List all knowledge bases with metadata
     */
    listKnowledgeBases(): Promise<KnowledgeBaseMetadata[]>;
    /**
     * Get detailed statistics for a knowledge base
     */
    getKnowledgeBaseStats(name: string): Promise<KnowledgeBaseStats>;
    /**
     * Rename a knowledge base and propagate to all chunk metadata
     */
    renameKnowledgeBase(oldName: string, newName: string): Promise<void>;
    /**
     * Delete a knowledge base and all its chunks
     */
    deleteKnowledgeBase(name: string): Promise<void>;
    /**
     * Delete chunks from a specific ingestion timestamp
     */
    deleteChunkSet(knowledgeBaseName: string, timestamp: string): Promise<number>;
    /**
     * Delete all chunks for a specific document from a knowledge base
     * @param knowledgeBaseName - Name of the knowledge base
     * @param filePath - Relative path to the document to remove
     * @returns Number of chunks deleted
     */
    deleteDocument(knowledgeBaseName: string, filePath: string): Promise<number>;
    /**
     * List all unique documents in a knowledge base
     * @param knowledgeBaseName - Name of the knowledge base
     * @returns Array of document metadata
     */
    listDocuments(knowledgeBaseName: string): Promise<import('../../shared/types/index.js').DocumentInfo[]>;
}
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