I've been thinking for quite some time that the AOM should have a developer mode. The built-in devtools should support a lot of this, but it doesn't mean these types of tools that are very specific to SDK extension development need to be built in - when you first enable the developer mode in the AOM, it could automatically install the add-on that supplies it. We can add whatever APIs to the AOM are needed to best support development, while having the meat of it implemented in the add-on. Best of both worlds.