The v2 branch of OpenCode has not been touched for months, if it's beeing developed then I don't know where.
replythis is very easy to check. i promise i'm not tricking you and just uploaded this. https://github.com/anomalyco/opencode/tree/v2
replythis is the integration branch for https://opencode.ai/v2 . it has been for months. it's where the Effect-based refactor has been landing.