There's a significant amount of code in Wordgard that is copy-pasted from CodeMirror or ProseMirror, but modified enough that trying to share it would involve nightmarish amounts of type parameters and extra indirection. You could certainly build a generic editor framework and then build several editors on top of it, but you'd end up with Raku-level amounts of architecture acrobatics and extra complexity, much of which would leak out in the public library interface, and I don't think that is generally worth it. I do occasionally, when I realize a bug fix applies to one of my other projects as well, repeat it there. But that's okay.