export interface SlackMessageFileMetadata {
    id?: string;
    name?: string;
    title?: string;
    mimetype?: string;
    filetype?: string;
    prettyType?: string;
    permalink?: string;
    mode?: string;
    size?: number;
}
export declare function extractSlackMessageFileMetadata(files: unknown): SlackMessageFileMetadata[];
export declare function extractSlackMessageContextLines(evt: Record<string, unknown>, baseText?: string): string[];
export declare function buildSlackInboundMessageText(baseText: string, evt: Record<string, unknown>): string;