I wonder what that means for war crimes responsibility.

Let's say a swarm of these things kills every civilian patient in a hospital or every child in a school. Who is responsible?

I'm surprised Israel wasn't the first to field such weapons.

Not any difference from sending a cruise missile into a hospital killing every patient or every child in a school. The people giving the order to press the button and the people pressing the button can be liable for war crimes (can be because killing civilians by accident isn’t necessarily a war crime or even having collateral civilian causalities).

Seems to me like every single person who enabled the process should be held partially responsible, with whoever gave the final approval holding the largest portion of that responsibility.

It doesn't mean anything new. The country or entity that deployed them is responsible for their behavior.

Whether any particular country or entity can be held responsible is another question.

Imagine sanctions killing a million civilians due to insufficient medical care. Imagine firebombing Tokyo. Imagine dropping a nuclear bomb on a city full of civilians. Imagine genociding Palestinians. Imagine bombing a girl's school, killing hundreds.

Who's responsible, AI or a human? That misses the point that noone seems to be responsible at all, even in democracies.