import { ComponentPropsWithoutRef, ReactNode, Ref } from 'react';
/**
 * Imperative transcript scroll state. Use `scrollToBottom` after the user sends
 * a message, which cannot be inferred from incoming content.
 */
export type ChatLayoutHandle = {
    /** Smoothly scrolls to latest and re-engages stick-to-bottom. */
    scrollToBottom: () => void;
    /** True within the stick-to-bottom threshold of latest content. */
    isAtBottom: boolean;
};
export type ChatLayoutProps = Omit<ComponentPropsWithoutRef<"div">, "children" | "style"> & {
    /** Message stream in the scrolling transcript. Omit for a prompt-only column. */
    conversation?: ReactNode;
    /** Bottom-pinned composer. Omit for a transcript-only column. */
    prompt?: ReactNode;
    /**
     * Receives {@link ChatLayoutHandle} for caller-driven scrolling.
     */
    controlRef?: Ref<ChatLayoutHandle>;
    className?: string;
};