This study is a hybrid type III effectiveness-implementation randomized clinical trial comparing standard PST implementation with PST augmented by the PST-Aid implementation strategy. The study will test whether:
1. PST Aid results in improved implementation outcomes (initial and sustained fidelity, adoption, reach, and reduced reactive adaptations);
2. Changes in usability, engagement, and appropriateness mediate the effect of PST Aid on implementation outcomes; and
3. PST Aid is more effective in reducing client depressive symptoms and improving functioning.
