The credulousness of “engineers” is embarrassing. The concept of a “fully autonomous” AI software engineer is incoherent in and of itself. That means it is self-debunking.
It’s just a tool that does mysterious things. It cannot take responsibility for itself or its own work. The software engineer who uses it must be able to supervise and test what it does— except modern software engineers have systematically kneecapped the culture of career testers, in favor of cutesy output checking that isn’t going to help much.
You need solid skeptical critical thinking. Good luck.