export type SlackExportFormat = "markdown" | "json" | "plain";
export interface SlackExportFileInput {
    id?: string;
    name?: string;
    title?: string;
    mimetype?: string;
    filetype?: string;
    permalink?: string;
    preview?: string;
}
export interface SlackExportMessageInput {
    ts?: string;
    authorName?: string;
    text?: string;
    files?: SlackExportFileInput[];
}
export interface BuildSlackThreadExportOptions {
    format?: string;
    includeMetadata?: boolean;
    threadTs: string;
    channelId: string;
    channelLabel?: string;
    messages: SlackExportMessageInput[];
    mentionNames?: Record<string, string>;
}
export declare function convertSlackMrkdwnToMarkdown(text: string, mentionNames?: Record<string, string>): string;
export declare function normalizeSlackExportFormat(format?: string): SlackExportFormat;
export declare function parseSlackExportBoundaryTs(value: string): number;
export declare function filterSlackExportMessagesByRange(messages: SlackExportMessageInput[], oldestTs?: number, latestTs?: number): SlackExportMessageInput[];
export declare function formatSlackExportTimestamp(ts?: string): string;
export declare function buildSlackThreadExport(options: BuildSlackThreadExportOptions): string;