/**
 * Host-side frame buffer tagged with the engine generation that produced it.
 *
 * The interactive host buffers custom-UI frames and extension UI requests that
 * arrive before their controller subscribes. Without generation tags a frame
 * buffered by a child that has since died would be delivered to the live host
 * afterwards, remounting exactly the UI that death teardown just removed —
 * component IDs restart at `remote_component_1` for every child, so the stale
 * frame would also collide with the replacement's own mounts.
 */
export declare class GenerationBuffer<T> {
    private entries;
    get size(): number;
    push(generation: number, value: T): void;
    /** Take the entries owned by `generation`; anything else is dropped, never requeued. */
    drain(generation: number): T[];
    /** Forget everything a now-dead generation left behind. */
    dropGeneration(generation: number): void;
    clear(): void;
}
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