Kast is the Kast Double Spectrograph, which lives on the Lick 3m Shane telescope.

The Filippenko group's Python-wrapped reduction pipeline is up on GitHub here (uses PyRAF, and is not really packaged very well). It probably can't be used without guidance, and would certainly need to be updated for observations from other groups (unless they perform observations in exactly the same manner as the Filippenko group), but hopefully it can provide a starting point!