This is a TW Project Management plugin.
This plugin is forked from version 0.0.45 of a previous plugin called nico/pm, which is a progenitor to Projectify. (I can no longer find nico/pm to make a direct attribution.) This plugin is indebted to Nico and that project for its basis, and may clobber some of the macros (at minimum) if installed alongside it; from 0.0.45 it followed a different opinionated development path based on my own use and needs.