openSUSE: Where are the kernel headers?

Q. Where are the kernel headers?

A. kernel-devel package.

Long-winded answer: The kernel sources are in the kernel-source package. To make use of the headers/sources, you can install the "Base Development" pattern (at the least) using YaST -> Software -> Software Management -> View (in upper left corner).

Package search: http://software.opensuse.org