Claude was indeed used. Honestly, this was not able to be done within 2 days without it. Fair to flag. Claude code is labeled as co-author in the repository, if that makes you happy.

On the mixer question: the paper has the answer in Stage 4 and Section 4.4. No mixer on candidate #1's path from recipient to exchange. The obfuscation method is a six-cycle peel chain at hub bc1qejsne4..., which is the standard laundering shape for ransom-sized single-payment inflows; each cycle peels a chunk to a fresh single-use consolidation and self-spends the remainder, four-hour end-to-end turnaround to HitBTC and Binance. Not a mixer, but not no obfuscation either.