Plugin host in Teapodo is done in two main modules: - The Teapodo audio engine provided "plugin slots" for the application to mount plugin instances to (in a thread safe way), which is written in Rust - The plugin format parsers to understand each plugin formats (e.g. VST3, AU) and create plugin instances from, which is written in C++ and is just a thin wrapper around JUCE

We did think about building our own plugin format parsers from scratch, but since we are really small (only 2 devs) we ended up using an existing solution for now. Maybe we will come around and do it at some point (I certainly hope we could!).

As for releasing the source code, that's definitely a possible option. We've seen some interest in the implementation of the project, and we will start by writing about it soon, so stay tuned!