looks like a wip addition to mergekit: https://github.com/arcee-ai/mergekit/blob/main/mergekit/scripts/evolve.py documented at

https://github.com/arcee-ai/mergekit/blob/main/docs/evolve.md

a couple more implementation approaches or repos discussed at

https://github.com/arcee-ai/mergekit/issues/207

mergekit seems a reasonable resource for this for now, they just implemented a newer method called DELLA

https://arxiv.org/abs/2406.11617