https://aifaultline.com/authors/xiangnan-feng/New papers by Xiangnan Feng in the AI Fault Line guide, and news naming them. https://aifaultline.com/research/p/doi-10-1126-science-adz9311/https://aifaultline.com/research/p/doi-10-1126-science-adz9311/Thu, 22 Jan 2026 00:00:00 +0000Using a classifier on more than 30 million GitHub commits by 160,097 developers, the study estimates that AI writes about 29% of Python functions in the US and that quarterly code output rose 3.6% as a result. Gains went to experienced developers, while early-career developers showed no significant benefit, which the authors say may widen skill gaps.