# Engine assets

Regex Tools executes ECMAScript through the browser's native `RegExp` engine.
It also ships the declared, self-hosted PCRE2 10.47 WebAssembly pack in
`pcre2/`.

The PCRE2 pack is built from pinned, documented open-source code and
toolchain revisions. `engine-metadata.json`, `SHA256SUMS` and `LICENSE.txt`
travel with the runtime files and are verified by the release gate.