That is, I want to set a value during an interceptor :enter and clear everything out at the last interceptor.

That may be problematic if the interceptor is part of an async operation.

As the thread executing code within the async chain may vary.

Yes, I’m aware of that. We mostly use futures in our code but I’m not sure if they propagate Thread locals too.

Obviously in async operations all bets are off but we’re not using them - the alternative there is manually keeping track of a log context