In a shared prototyping environment you can break your own stuff but not other people's; anything affecting others needs a higher level of review.

if you are working on something that is going to impact other people's work, that requires a higher level of review and more of a typical kind of dev workflow where we want to make sure that what you push isn't going to break stuff for other people. So my rule is you can you can break your own stuff, but you can't break other people's stuff