Where to start with Plugins?

Hi there.

I would like to write a little tool, that reads a file, has some settings/selections and when finished, outputs a static mesh.

Are plugins the right way to do this? It’s not a Gameplay feature, but an Editor Tool.

I alread read this:

But to me it seems like that Plugins are for declaring classes and gameplay code…

As said, I want to write a tool, that I can open up in the editor, which reads a file from the FileSystem and builds a static mesh out of this file.