[Feature Request] multi-turn reward for RLHF

[vmoens]

Implement rewards as proposed in https://arxiv.org/pdf/2405.14655

[ggbondcxl]

I am very interested in multi-turn RLHF, can you give a sample code

[rghosh08]

@vmoens I am interested in this. there any progress. I am ready to collaborate or start from scratch.