/** MCP SDK internal tool registry — field name "handler" confirmed in SDK v1.29.0 */
export type McpRegisteredTool = {
    handler: (args: Record<string, unknown>, extra: Record<string, unknown>) => Promise<unknown>;
};
export interface McpServerInternal {
    _registeredTools: Record<string, McpRegisteredTool>;
}
/** Client → Master: invoke MCP tool */
export interface IpcToolRequest {
    type: "tool";
    id: string;
    tool: string;
    args: Record<string, unknown>;
}
/** Master → Client: tool result */
export interface IpcToolResponse {
    type: "tool_response";
    id: string;
    result?: unknown;
    error?: string;
}
/** Client → Master: begin QR login flow */
export interface IpcLoginStart {
    type: "login_start";
    id: string;
}
/** Master → Client: QR code URL to display (may fire multiple times as URL refreshes) */
export interface IpcLoginQr {
    type: "login_qr";
    id: string;
    url: string;
}
/** Master → Client: QR login finished */
export interface IpcLoginDone {
    type: "login_done";
    id: string;
    success: boolean;
    username?: string;
    error?: string;
}
export type IpcMessage = IpcToolRequest | IpcToolResponse | IpcLoginStart | IpcLoginQr | IpcLoginDone;
/** Encode a message as newline-delimited JSON */
export declare function encodeMessage(msg: IpcMessage): string;
/** Parse newline-delimited JSON messages from a buffer, returns parsed messages + leftover */
export declare function parseMessages(buf: string): {
    messages: IpcMessage[];
    remaining: string;
};