So I created: https://gitbox.apache.org/repos/asf/incubator-nuttx.git https://gitbox.apache.org/repos/asf/incubator-nuttx-app.git
At nit: Historically, the directory is call apps/ not app/. That is the way it is referred to in all of the documentation of and the consciousness of NuttX users.
But I am flexible if others are too.
