This package has a very specific personalized functionality, it runs a shell script which tries to compile your currently active file in its directory and writes the (copyable) stdout/stderr into a new pane with some style.
Attention: This package is probably not useful for you, except you are new to Atom and want to write a package which does something close to what is described above. In this case feel free to have a look at the code. Reasons why the code may be helpful:
It is reduced to the necessary, essentially one file lib/kara.coffee plus a style file (all Povray stuff can be ignored and the shell script lib/run is of no interest for the Atom functionality).
There are no specs, menus, subscriptions, disposables, promises (definitely no promises), etc... stuff which can confuse beginners.
There is some in-line documentation.
Good catch. Let us know what about this package looks wrong to you, and we'll investigate right away.