This email (July, 2023) from Suzanne Cooper, Academic Dean for Teaching and Curriculum, provides a default policy on student use of generative AI for coursework. Access requires Knet credentials.
Guidance from the Office of the Provost on the use of generative AI tools across Harvard.
See Page 13 of the HKS syllabus template for guidance on creating an AI syllabus policy, and examples of policies from many institutions.