From a subpage: This is a redirect from a subpage. In a page title, a subpage name appears after a forward slash (/); for example, "Wikipedia:WikiProject Cricket/Articles", which is a subpage of "Wikipedia:WikiProject Cricket", redirects to Template:CricketRecentChanges. Not all articles or other pages with "/" in their titles are subpages (e.g. CP/M).
Shortcuts are wikilinked on community pages, talk pages, and edit summaries, but not in mainspace articles. Transclusions in mainspace are common and do not need to be "fixed".
When appropriate, protection levels are automatically sensed, described and categorized.