What package controls editor splits?


I’d like to change the way splits are handled in Atom. With other behaviors I’ve browsed through my list of installed packages to find a plugin that controlled the behavior I wanted to change, and modified the plugin. For tabs I can’t seem to find anything for that. Is this just a core feature that plugins don’t get to control?


You’re right, that functionality is part of the core.

You can go to https://github.com/atom/atom/tree/master/src and search for “pane” and you will see the files.