Experimental: Intervention

In addition to standard HCV results disclosure for the comparator arm, intervention participants will have two counseling sessions:~Session 1: Immediately after HCV results disclosure, a staff-facilitated session with the index to (1) Establish HCV Treatment Goals, fostering commitment, and (2) Engage the Injecting Partner, identifying ways to support treatment initiation.~Session 2: One week later, involving both the index and injecting partner, to (1) Enhance Partner Support with specific strategies for HCV treatment initiation and (2) Collaborative Navigation Mapping, using a navigation map tool. By Session 2's end, both will have a completed navigation map, a visual guide for the HCV treatment journey.~Both sessions stress communication and dyadic coordination. The navigation map tool ensures a personalized plan for the index's treatment initiation and the partner's supportive navigator role.

No_intervention: Control

Standard of care HCV disclosure. This staff-facilitated session follows the California HIV/HCV test counselor certification protocol with the Index alone.