export type MessageVote = 'up' | 'down';
export interface FeedbackEntry {
    messageIndex: number;
    messageId?: string;
    vote: MessageVote;
    updatedAt: string;
}
/** Mint a durable chat-message id (also used by SessionManager.addMessage). */
export declare function mintChatMessageId(): string;
export declare function listMessageFeedback(platform: string, channelId: string, threadId: string): Promise<FeedbackEntry[]>;
/** Resolve vote for a history message (prefer id, fall back to index). */
export declare function resolveFeedbackVote(entries: readonly FeedbackEntry[], opts: {
    messageId?: string;
    messageIndex: number;
}): MessageVote | undefined;
export declare function upsertMessageFeedback(opts: {
    platform: string;
    channelId: string;
    threadId: string;
    messageIndex: number;
    messageId?: string;
    vote: MessageVote | null;
}): Promise<{
    vote: MessageVote | null;
}>;
export declare function clearThreadFeedback(platform: string, channelId: string, threadId: string): Promise<void>;
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