A student's use of an AI program to compose “their” work is plagiarism in the most basic sense: “the practice of taking someone else's work or ideas and passing them off as one's own.” This counts for ANY aspect of the AP Lang: Prep and Practice (e.g. annotations, Parlay responses and feedback, in-class responses, etc.) and Body of Evidence assessments (e.g. claim-based paragraphs, essays, projects, etc.). In addition to this, not making the genuine effort to compose your own work in a skills-based writing course will not allow you to develop those skills beyond where they were at the beginning of the semester. 

At this point, the MDIHS Academic Honesty Policy does not specifically address student use of AI, but a team is being organized to develop an appropriate policy by the end of the academic year. The following guidelines from teacher Miriam Scott are a good starting point for discussions around this topic.