Is there a way to build for production, but keep certain dependencies (and my app) in development?

[final moat]

I'm building a multi-framework, multi-language REPL,
preview here: https://repl-sdk-v2.limber-glimdown.pages.dev/
it's currently a full development build

[distant thistle]

I am not sure I understand the question. Do you mean not include certain dependencies when building for production ?

[scenic dust]

I think more like: Not "triggering" React's production mode which is done via NODE_ENV=production, similar for other frameworks/langs, but still minifying the build (and the "shell")