graphical debugger?

From what I know, Jupyter notebook + IPython support debugging python code.

Since the underlying interpreter gomacro already contains a text-mode debugger, and an API to interact with its debugging facilites (step, next, finish, set/get variables, get stack trace...), implementing a Go debugger in gophernotes may be feasible an dit could be **very** useful.

Somebody has enough experience (@SpencerPark ?) with Jupyter protocol and can help or point to the relevant messages to exchange with Jupyter to implement a debugger?