This study is a large hybrid type 1 effectiveness-implementation randomized controlled trial evaluating the comparative effectiveness of long-acting injectable buprenorphine (XRB) versus sublingual buprenorphine (SLB) among incarcerated adult volunteers with opioid use disorder (OUD) who are preparing for release. The study addresses the urgent need for high-quality data comparing these two buprenorphine formulations in corrections-to-community transitions, where individuals face heightened risks for overdose and poor treatment engagement. Using random assignment, the study team is tracking how well participants adhere to their treatment plans 12 weeks after leaving prison. They monitor substance use and overdose incidents and gather feedback from participants about their experiences, as well as assess the cost and feasibility of implementing these treatments in a correctional setting.