The initial release of Effectum is out! Pretty happy with how it turned out, and my first application will be to use it for background image processing in Pic Store. Look for more about that in the coming weeks.
One interesting issue I immediately encountered after releasing v0.1.0 was that the trait bounds on the job runner were overly strict. I had required Sync on the future returned by the job runner function, when actually nothing in the library required that. But that meant that any job runner function could not hold a non-Sync value across an await point. Fortunately this was just a matter of removing the trait bound and adding a test whose job runner function holds a Cell across an await.