I really like this project.
I always put this on the top of dependency list for Python project.
The coverage of this lib: all Python Object, flexible use case and customizable are fascinating.

But there is lack of guard, and I have learned how to handle it by suffering.

I think this might helpful,

1. Guaranteed Correct DI attr on bootstrap:
   1.1. Check Literal str Injection if attr is exist.
   1.2. Check wiring missed Provide[...]
   1.3. Checking provider args.

2. Reliable Container Initializing:
   I have written code initializing container 2 times. Cause was wiring including container initializing. But there was no sign, just side effect. I hardly found that after some problem.

Thanks for your effort.