/**
 * Cleans a template variable text by removing disallowed characters,
 * trimming excessive whitespace, escaping unsupported patterns,
 * and stripping newlines (which are not allowed).
 */
export declare function cleanTemplateText(input: string): string;
/**
 * Validates template text against WhatsApp Business API rules.
 * Returns an array of warnings (no errors are thrown).
 */
export declare function validateTemplateText(input: string): string[];