I spent months inside verl (an RL post-training framework), forked it, then stopped. Wrote up the internals, the tooling a fork costs, and a nasty NCCL bug.

I wasn't sure whether to post this here or not but a friend of mine said that a lot of researchers lurk into this subreddit and it might help them, and I think it might also help anyone trying to tinker with stuff at hom