It has been suggested to provide an example of how the migration was done for core skins – unfortunately it looks like it's not really possible or practical to do this:
- No one listened to me, and Modern and CologneBlue have been immediately moved to separate repositories while being converted (change in core is , new repositories are and ). This makes comparing differences hard to impossible.
- MonoBook and Vector are, most of all, not done yet; when they will be done, the diff will be full of core changes where the skins were hard-coded or just intertwined with core code, which is obviously not relevant for normal skins.
- The only non-core skin that has even been deployed on Wikimedia wikis so far, Nostalgia (which is only used by nostalgia.wikipedia.org), has always used the new way since it was recovered from the great skin purge over a year ago.
If you think this can be put in an useful form, do suggest a way or just improve the page, but I don't think it can be made useful.