This is like QLab [0], right? If so, it's fantastic to see an open-source solution pop up in this space. That was very fun software to play around in when I was using it for an immersive tabletop roleplaying game I ran. Is the goal to focus exclusively on lighting control, or will other types of effects (sounds, video, HTTP) be included eventually as well?
If you have never used QLab, I recommend downloading it and tinkering for a little while. It is probably the best-designed native macOS app that I’ve ever come across, finely tuned by a handful of developers for something like 15 years. It’s a great reminder of what apps _could_ feel like.
This is more of a lighting controller while QLab is a show controller. These are typically viewed as different layers of the stack: a show control system controls the light control system.
I don't know much about BlindersKitten but the page says it can receive OSC. OSC was originally for sound applications but is common as a show control protocol today due to being fairly simple and open (much like MIDI-SC, a formerly common show control protocol based on MIDI). So conceptually OSC is likely how a show control system would send commands (cues) to BlindersKitten.
One such free OSC software you could use to control it (+ handle sound, video, etc as asked in GP) is https://ossia.io :) (transparency report: i'm the dev)
I'm not seeing any open source license in the repo, so this is more "public source" than open source. You can't modify and redistribute the code for eg.
[0] https://qlab.app/