It looks like the researchers just wrote the agentic harness and the rest of the work really was done autonomously by Claude with only extremely limited guidance after.

BTW the first author of the paper worked in the Doudna lab studying the origins of crispr (and after their PhD, joined Anthropic). All of the authors either have, or are going to have, excellent careers. I dont' think they are worried about attribution.

Anthropic is paying them to not worry that much about attribution. If any of them emphasised their role over and above Claude they wouldn't get the money anymore.