User blog comment:Kirkburn/Technical Update: November 25, 2015/@comment-24473195-20151126133730

I noticed a new message in Special:jspages about adding imports to. But it doesn't seem to contain any information about how exactly to achieve this, nor does the Help:Javascript Review page include any of this.

This  pull request seems to have introduced it:

"All imported scripts should be separate by new line and contain just article name for local imports and for external imports also 'dev:' prefix."

It seems that the syntax may be something like :

dev:Jumbles/code.js // for dev scripts

MediaWiki:Jumbles/code.js // for local scripts

This is a nifty way to import stuff, but I feel that it is way too easy to add too many unnecessary scripts that will load on all pages. One suggestion would be  a way to define scripts that are only loaded in specific namespaces, for specific groups, and / or pages.