The routines are all basically related to the meta-command functions.
Sub-commands in libexec must use saturnin_wraphook if they want pre/post hook, or may use saturnin_runhook to run their own hooks as they wish.
This module is intended to be moved around with saturnin, but unlike main meta-command (bin/saturnin.skel), it should not be necessary to rename it or edit to adapt to new project.