Hi @ligross and welcome to the community! I went ahead and moved this post to the development section. I’m not aware of anyone working on continuous-energy, adjoint MC for neutrons in OpenMC. There was some work at MIT for doing adjoint-weighted tallies for sensitivity coefficients and kinetics parameters, and we are planning on continuing that work at ANL later this year, but that’s a bit different than what you’re talking about if I understand correctly.
Getting a large feature merged into the main branch can be challenging, so I’d encourage you to stay engaged with the development team as you begin work to make sure you’re going down the right path. If you’re interested, it’d be great to have you join for one of our monthly drop-in sessions.