If they had that, they’d no longer be FOSS and instead “source available” and half the community will raise the pitch forks. Best FOSS licence to protect against this sort of thing is AGPL because it’s toxic for corporations. But even that could be used in this case if they had the source on the same computer imo (IANAL though)

My personal recommendation is only one at a time though

Not picking on you, but I see people use “AI” instead of “UI” more and more these days and I wonder if it’s part of the reason all startups suddenly feel like they have to introduce AI features — everyone keeps talking about how important it is after all