/**
 * Creates the regex used to recognize the uppercase commitment type at the beginning of a Book line.
 *
 * A fresh regular expression keeps Monaco tokenizer state isolated from parser calls.
 *
 * @returns Regular expression matching one Book commitment-like line.
 *
 * @private internal utility of Book parsing and `<BookEditor/>`
 */
export declare function createBookCommitmentLineTypeRegex(): RegExp;
/**
 * Extracts the uppercase commitment type from a Book line, including types not registered by Promptbook.
 *
 * @param line - One raw Book source line.
 * @returns Matched commitment type or `null` when the line does not begin with commitment syntax.
 *
 * @private internal utility of Book parsing and `<BookEditor/>`
 */
export declare function getBookCommitmentLineType(line: string): string | null;