The base version for uselessd is systemd-208, which is the version used in 13.1. Let's try if a direct substitution of the binaries works and watch out for the problems.
Expected result of the project is to have a working package with "Conflicts: systemd" and "Provides: systemd". The goal is not to fix all problems, a stripped down system with uselessd is considered a good achievement. Anything more complicated could build on top of this.
Once a kernel is built, a developer/janitor may want to boot the kernel for various reasons, such as performing simple boot test or running tests and workloads from user space or simply playing around in a shell. However, an easy to use and a descriptive tool to perform those tasks doesn't exist to our knowledge.
GFXprim is a minimalistic widget library written in C I've been toying with for the last ten years. At this point there are several useful application written in it such as music player, pdf browser, map viewer etc.