It would be useful to know a bit about your ideal situation: Do you require a responsive height for your document or can you get by with just a responsive width?
Here's how Hype handles resizable OAMs: When you set scaling to true on any dimension, scaling and resizable will be added to the OAM manifest:
<property name="resizable" defaultValue="false" hidden="true"/>
<property name="scaling" defaultValue="none" hidden="true"/>
(You can see where that is placed in an example file here: https://gist.github.com/themorgantown/11a21c490dd2a098ff7cc7c57a9e60dc#file-iconicstructures_oam-xml-L39)
So this file has a 'default' size on line 9, but it can be resized to fit within a Bootstrap column. Here's an example responsive OAM (unzip first):
temp-muse.oam.zip (264.7 KB)