Generative AI is crossing a critical threshold, shifting from an assistive tool to a system capable of directly assuming work. Early in 2026, this shift became visible almost simultaneously in Silicon Valley and Hangzhou. In the US, Anthropic enabled executable plug-ins for Claude, turning large language models into task-orchestrating AI agents and jolting the software industry. In China, a Hangzhou-based AI startup triggered a parallel shift by pushing AI directly into corporate accounting and displacing manual bookkeeping workflows.