import type { MCPInvoker } from "./providers/mcp";
import type { MCPProviderConfig } from "./types";
/**
 * Manages MCP server connections for knowledge providers.
 * Implements MCPInvoker interface to allow MCPKnowledgeProvider to invoke tools.
 *
 * Based on SkillMcpManager pattern but simplified for knowledge provider use case.
 */
export declare class KnowledgeMcpManager implements MCPInvoker {
    private clients;
    private pendingConnections;
    private serverConfigs;
    private cleanupRegistered;
    private cleanupInterval;
    private readonly IDLE_TIMEOUT;
    /**
     * Register an MCP server configuration.
     * The server will be started lazily on first invoke.
     */
    registerServer(config: MCPProviderConfig): void;
    /**
     * Unregister an MCP server and disconnect if connected.
     */
    unregisterServer(serverName: string): Promise<void>;
    /**
     * Check if an MCP server is available (registered and can connect).
     */
    isServerAvailable(serverName: string): Promise<boolean>;
    /**
     * Invoke a tool on an MCP server.
     */
    invoke(serverName: string, toolName: string, args: Record<string, unknown>): Promise<unknown>;
    /**
     * Get or create a client for the given server.
     */
    private getOrCreateClient;
    /**
     * Create a new MCP client connection.
     */
    private createClient;
    private createStdioTransport;
    private createSseTransport;
    /**
     * Disconnect a specific server.
     */
    private disconnectServer;
    /**
     * Disconnect all servers and clean up.
     */
    disconnectAll(): Promise<void>;
    private registerProcessCleanup;
    private startCleanupTimer;
    private stopCleanupTimer;
    private cleanupIdleClients;
    /**
     * Get list of registered server names.
     */
    getRegisteredServers(): string[];
    /**
     * Get list of connected server names.
     */
    getConnectedServers(): string[];
    /**
     * Check if a server is currently connected.
     */
    isConnected(serverName: string): boolean;
}