I'm not sure whether you've seen this, but we have settled on a specific design ...

I'm not sure whether you've seen this, but we have settled on a specific design for sharing effectful code across platforms!

As you noted, a few other changes to tasks and modules need to land before we can ship that. There are currently PRs in progress to implement those changes, e.g. https://github.com/roc-lang/roc/pull/6658 and https://github.com/roc-lang/roc/pull/6683