The vscode extension builds are including your full source code and node_modules directory which makes it 21 mb. You can reduce the size (and potentially keep your code less easily reversable) by excluding those from the final package
Seems like a cool thing, I'm definitely interested as my work provides us with an API key to use. However I can't find anywhere that lists all the functionality offered. Maybe I'm missing something? It might be premature to launch the app before listing what it does.
You can also use the ifdef-loader module to have code that is conditionally included in the output build, allowing you to have debug code not make it into prod builds. The `rc-dev-` license keys being a good example of that.