Love it! I built a toy library that looked very similar to this one a few months ago. How does this handle changing the workflow code? I quite like how Temporal

Love it! I built a toy library that looked very similar to this one a few months ago. How does this handle changing the workflow code? I quite like how Temporal handles it, where you use an "if has(my_feature)" to allow for in-progress workflows to be live-updated, even in the middle of loops. I also introduced an idea of "object handles", something like a file descriptor, which is an opaque handle to the workflow function but which can be given to a step function to be unwrapped, and it can can be persisted and restored via a consistent ID.