I consider use which to build tiddlywiki plugin.
GitHub - noflo/noflo-ui: NoFlo Development Environment has smaller size, but its UI is outdated, and require more effort to use because no typescript typing and is separated to too many packages.
Fibonacci Sequence | Playground | Coding, Simplified: Visual Programming with Flyde is larger (10M+), but UI is beautiful and modern. And come with ts typing, easier to maintain.
If choose Flyde, I may embed its editor in TidGi app, instead of make it a plugin, so size won’t be a problem. And its runtime can still be a plugin, so its workflow still runs on mobile.