I would like VE to validate if image names provided in a template parameter refer to existing page names (see bug 52651). I believe this would require one to specify that the parameter is of a type more specific than just "string" or "string/wiki-page-name".
Version: unspecified
Severity: enhancement
See Also:
https://bugzilla.wikimedia.org/show_bug.cgi?id=52651
https://bugzilla.wikimedia.org/show_bug.cgi?id=51374