[wooly_bully]

Lots of reasons to love a visual debugger:

- Easily set breakpoints and localize faults quickly.

- Enter the debug shell and evaluate statements based on the current program context.

- Tinker with variables at runtime and see how the code responds.

- Conditionally catch things that are going wrong and evaluate program state at the time.

- Simulate difficult-to-reproduce things like race conditions by messing with program state.

- Use it like a CLI to do stuff from the program, like send requests using the actual program code.