plone/plone.app.toolbar — comment on commit 30d6e4d4b34217e63f8fcb2624e24e254430b28d
File:  line 0
By lrowe:

The toolbar skin is intended to include everything necessary for both the top toolbar and the overlays. We don't want to create yet another special skin with it's own copies of resources.

`edit` is an alias (usually for atct_edit in the case of AT content) set on the type fti in portal_types. Unfortunately that's a skin template rather than a view, so you won't be able to mark it with an interface. You might need a list of special cased ids for those and get changeSkin a little differently.