One of the cornerstones of jurisprudence, going back to Ancient Rome if not earlier, is that you cannot retroactively apply laws. It's expressly prohibited in most jurisdictions; new laws come into force only after they're signed into law.

Besides, most AI devs work for corporations, and their work belongs to the corporation, so the corporation itself would be liable. At worst you might see the fabled "Corporate Death Penalty" applied, but I doubt it.

Whether you listen to your intuition or go full speed ahead... Well, that's on you. I know what let's me sleep at night.