/**
 * Reactions -- emoji reactions on session messages.
 *
 * Any session participant (user or agent) can react to any message.
 * Reactions are persisted in a dedicated DB model and broadcast as
 * transient events for real-time updates.
 */
/**
 * A single emoji reaction on a message, set by any session participant (user or agent).
 *
 * Reactions are persisted in a dedicated DB model and broadcast as transient events
 * for real-time updates.
 *
 * @docLink packages/types/messages#reaction
 */
export type Reaction = {
    /** Unicode emoji character (e.g. "thumbs up", not ":thumbsup:"). */
    emoji: string;
    /** ID of the user (or "agent" for agent reactions). */
    userId: string;
    /** Display name at reaction time (avoids extra lookups for tooltip rendering). */
    userName: string;
    /** Unix epoch milliseconds. */
    timestamp: number;
};
/**
 * Quick-access emojis shown in the reaction bar picker.
 *
 * An `as const` array of eight Unicode emoji characters in display order.
 *
 * @docLink packages/types/messages#reaction
 */
export declare const QUICK_REACTIONS: readonly ["👍", "👀", "✅", "❤️", "🤔", "🫡", "👏", "🎉"];
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