cm_tools are a set of utilities serving as wrappers around the RCS system. Particularly, they set the checkin timestamps to the modification date rather than the commit date, along with a few other differences. They and the directory editor, ded, are designed to work together. td_lib (available from SlackBuilds.org) is required to build this. Note that you do not need to actually 'installpkg' td_lib if you do not want to. It only needs to be built and when cm_tools is built alongside it, cm_tools will find it. You can then remove the td_lib directories and package if you don't want them. The SlackBuild differs from a default installation in not setting the set-uid bit on the 'vcs', 'checkin', and 'checkout' binaries. If you need this, modify the SlackBuild to suit.