import type { JsonRpcNotification, JsonRpcRequest, JsonRpcResponse, McpRequestOptions } from "./types.js";
export type McpTransportFailureKind = "spawn" | "timeout" | "cancelled" | "closed" | "protocol" | "network" | "too-large" | "browser";
export declare class McpTransportError extends Error {
    readonly kind: McpTransportFailureKind;
    readonly status?: number | undefined;
    constructor(kind: McpTransportFailureKind, message: string, status?: number);
}
export interface McpTransport {
    readonly kind: "stdio" | "http" | "sse";
    start(options?: McpRequestOptions): Promise<void>;
    request(message: JsonRpcRequest, options?: McpRequestOptions): Promise<JsonRpcResponse>;
    notify(message: JsonRpcNotification, options?: McpRequestOptions): Promise<void>;
    close(): Promise<void>;
    sessionId(): string | undefined;
    setProtocolVersion(version: string): void;
}
export declare function isAbortError(error: unknown): boolean;
export declare function withTimeout(parent: AbortSignal | undefined, timeoutMs: number | undefined): {
    signal: AbortSignal;
    dispose: () => void;
};