great project! without actually having looked at the code, there is one suggestion you might consider. Not sure how much you need to do with the object store backends, but if there is no need to create buckets etc you may want to use the object_store crate used by delta-rs also in your internal implementation. Mainly since delta-rs will always need the corresponding config and it has a very minimal dependency footprint. As a bonus, it makes the supported storage backends quite extensible via the

ObjectStore

trait.