Medications for opioid use disorder (MOUD) can cut overdose deaths by about half, yet only a small fraction of drug court participants receive them. This study adapts and expands Clinical Organization and Legal Agency Alliance Building (COLAAB), a program shown to be effective in Massachusetts drug courts that strengthens partnerships between courts and MOUD providers through structured meetings, communication tools, site visits, and academic support. Researchers will evaluate how well COLAAB is adopted, how it improves collaboration and referral processes, how much it costs, and ultimately, how it impacts participants’ engagement in MOUD services.