import { HTMLAttributes, ReactNode } from 'react';
export interface ChatMessageGroupProps extends HTMLAttributes<HTMLDivElement> {
    children: ReactNode;
    className?: string;
    /** When true, wraps children in a shared rounded surface. */
    sharedSurface?: boolean;
}
/**
 * Groups related discussion messages with tighter spacing.
 *
 * Presentational primitive — fully supported; you own the data. Connected
 * counterpart: {@link AthenaChatMessageList} groups consecutive messages by
 * sender itself. The pure grouping utility {@link groupDiscussionMessages} is
 * usable from either layer.
 */
export declare function ChatMessageGroup({ children, className, sharedSurface, ...props }: ChatMessageGroupProps): import("react").JSX.Element;
export interface ChatMessageLike {
    id: string;
    replyToMessageId?: string | null;
    roomSeq?: number | null;
    senderId: string;
}
/**
 * Groups messages for discussion layout.
 * Contiguous same-sender messages without a reply break stay together;
 * reply chains also stay adjacent.
 */
export declare function groupDiscussionMessages<T extends ChatMessageLike>(messages: readonly T[], options?: {
    maxGapSeq?: number;
}): T[][];