/**
 * libraryVersion — "which version of this library produced that?"
 *
 * Anything that ships a record of a run out of the process — an audit chain, a
 * bug-report bundle — has to stamp the library version on it, or the person
 * reading it months later is comparing behaviour against a version they are
 * guessing at. That is one job, so it is one function: two copies of this walk
 * would be two answers to a question that must have exactly one.
 *
 * It reads the package manifest through `lazyRequire`, trying the installed
 * specifier first and then the relative paths that work from `dist/` and from
 * `dist/esm/`. The `name` guard rejects any manifest that is not ours — a
 * relative walk in a consumer's tree can otherwise find THEIR package.json and
 * stamp a record with the application's version.
 *
 * Never throws, and answers `'unknown'` when it cannot tell. A version that
 * cannot be read is a stamp that says so; a thrown error here would take down
 * the export that merely wanted to label itself.
 */
/** This library's own version, or `'unknown'`. */
export declare function libraryVersion(): string;
/** The engine underneath, or `'unknown'` — the other half of "which versions?". */
export declare function engineVersion(): string;