The biggest new feature of GNOME Builder 3.18.1 is initial support for the Vala programming language by implementing a plugin that depends on the libvala 0.30 library and supports functions like jump to definition, autocompletion, a symbol tree, as well as as-you-type error highlighting. The GNOME community is urged to contribute to this Vala plugin in order to make it better and much more useful to developers.