There's no repo yet, but if enough people find it useful, I'll make time to create one.

The front end is written in Next.js, although I should probably rewrite it in vanilla JavaScript for the OSS version. The back end is a PHP service—essentially a continuously running `php -f server.php` process. Since it's a long-running process, it's effectively as fast as anything else (think a Rust binary).

It's very well written, with a strong focus on security and memory management. I think you'll like it.