/**
 * Transport selection for mcp-server-dig.
 * Defaults to stdio; HTTP mode via --http flag or DIG_TRANSPORT=http.
 */
import type { McpServer } from "@modelcontextprotocol/sdk/server/mcp.js";
export type TransportMode = "stdio" | "http";
export declare function resolveTransportMode(argv: string[], env: Record<string, string | undefined>): TransportMode;
export declare function resolveHttpPort(env: Record<string, string | undefined>): number;
export interface TransportHandle {
    close: () => Promise<void>;
    port?: number;
}
export declare function startTransport(server: McpServer, mode: TransportMode, port: number): Promise<TransportHandle>;