import type { GuestLimits, GuestHandle } from "../types";
/** Runtime boundary for a hardened guest realm; limits and capability declarations cross the boundary. */
export interface GuestRuntime {
    /** Spawn a guest with fully resolved hostile-realm limits and async capability stubs. */
    spawn(o: {
        modules: string[];
        globals: ReadonlyArray<{
            name: string;
            kind: 'async-fn';
        }>;
        limits: GuestLimits;
        signal?: AbortSignal;
    }): Promise<GuestHandle>;
}
/** Duck-type schema. */
export declare const guestRuntimeSchema: import("@nhtio/validation").AnySchema<any>;
/** Structural guard. */
export declare const implementsGuestRuntime: (value: unknown) => value is GuestRuntime;