Screenshots?

Also, it's hard to understand "what" this is emulating. Does it start and boot up? Do I need to find the OS somewhere? Can I run any IBM 1130 program, or do I need to provide some other kind of virtual something? How would I actually go about running a program written for the IBM 1130?

It seems to be a link to a development branch. The authors may not have intended this to be shared in its current state.

The IBM 1130 doesn't have a screen.

it supported the IBM 2250 model 4 graphics display unit

First computer I used was an ibm 1130. punched cards and green-bar line printer paper. I remember it didn't have much memory, so I had to read/write data to a (giant sized, small capacity) hard disk. All Fortran.

Same here, except I also wrote assembly and had teammates who wrote RPG

Is it all vibe coded? Looks and feels like LLM slop.

There are commits from over 6 years ago in there.

The Turing test for code: LLM "slop" is now indistinguishable from code written by human 6 years ago.

Another way to put it is that six years ago, some developers unknowingly failed the Turing Test circa 2025.