The Seattle Girls’ School (SGS) is an all-girls middle school in the Central District. To support SGS’ ongoing commitment to inclusivity and cultural competency, this project designed library systems that cultivate values of diversity, advocacy, and empowerment. We designed and facilitated four participatory design sessions with students to rework the nonfiction library’s collection development and classification practices. In collaboration with Student Librarians and the SGS staff, we implemented two physical check-out zones to increase engagement with and community responsibility for library materials. As the SGS library grows, this project creates opportunities for student leadership and innovation in community sustained librarianship.