I hit this on my laptop today. When gdb hits a softpoint, it prints this error message and softlocks; later it segfaults on exit.

This is only happening on older versions of gdb (my laptop runs debian which usually means it isn't running the latest version of anything). Upgrading my laptop to a newer version makes the problem go away, so it's probably a bug in GDB, but I'm opening this just b

defaults should be set in window creation to not allow inivisble windows

could be very confusing to those new to the engine.

default window size of 640x480 (mirror dc) or 800x600 would be sufficient.

Change could be made in simulant/application.h

struct AppConfig {
    unicode title = _u("Simulant Application");
    uint32_t width = 0;
    uint32_t height = 0;

NYPM needs a logo.... but we should def first change the favicon to not be the react logo -___-

This is not an issue but I've been looking to use libtari and been looking at the source of your project.
I've been able to figure it out a bit, but perhaps documenting how to lib work would help people to get on board with DC dev?