University of Chicago Law School Professor Claude was updated to change page numbers and accidentally deleted all his class notes for the year

University of Chicago law professor William Baude had Anthropic's AI assistant Claude update page numbers in older constitutional law lecture notes, which accidentally deleted the 2026 fall semester final teaching syllabus and all Class N 2023 class notes. Claude admitted the mistake and proactively asked for recovery options. The incident highlights the risk of AI agents directly manipulating local files for users.