import type { Socket } from "node:net";
export interface HostHello {
    role: "attach" | "control";
    cols?: number;
    rows?: number;
}
export type HostControlOp = "snapshot" | "status" | "detach" | "terminate" | "terminate-idle" | "input";
export declare function connectHost(id: string, hello: HostHello): Promise<Socket>;
/** `id` is a job id, or a host socket path (workers know the path, not the runtime dir). */
/** `extra` goes with the op (M30: `{ data }` for input). */
export declare function hostControl(id: string, op: HostControlOp, timeoutMs?: number, extra?: Record<string, unknown>): Promise<unknown>;