There are two tags for questions about the TES Construction Kit, namely
tes-construction-set and (the presumed master tag)
The first tag has zero questions, and the second an impressive three.
I'm not sure whether we need these at all, since questions about modding tend to be off-topic, but that matter has been addressed before.
All three aforementioned Construction Set questions are ..questionable in their on-topicness: one is about the direct in-game impact of a change made in the editor, one about a self-made patch to resolve compatibility between two mods, and one about being unable to open a native
.esp file in the Creation Kit.
For questions regarding the modding of Fallout 3, Fallout: New vegas, and Fallout 4, the general tag
mods is used.
Assuming tags for specific editors of specific games is convenient, we might need to add
Creation Kit for Skyrim and Fallout 4, and
G.E.C.K. for Fallout 3 and fallout: New Vegas.