Engineering Signals of Human-AI Collaboration in the Agentic Coding Era: A Longitudinal Analysis of 33,228 Pull Requests from vLLM and SGLang with Implications for Biomedical AI Agents and Bioinformatics Pipeline Developmen

A longitudinal study of over 33,000 pull requests from the vLLM and SGLang repositories examines how AI coding assistants and autonomous agents are altering open-source software development practices. The findings provide empirical evidence on shifts in engineering workflows as automated tools become more deeply integrated into complex coding pipelines.