At this point it doesn't seem that Mojo is exposing any access to threads or provides public implementation of parallelize or other algorithm functions.

I really wonder - are there any docs/discussions/ideas about how the thread-safety enforcement (if any) would Mojo have?
In Rust we have Send/Sync, pinning for async stuff, etc.
Swift ended up having single Sendable trait, but it lacks the ability to return/store references, so its model is simpler than Rust's.
Mojo looks much closer to Rust in terms of reference semantics (with the difference that when you want to store them - you have to convert them to pointers), so I wonder whether there were any discussions about thread-safety topics in Mojo.