M Bussonnier

no, the api of version 4 is different. This was added to fix #645. Basically this mean any 3.x.y but not any 4.z.t, with the `

Reformating within a live notebook might not be the easiest. There is in general a question on how to get plugin for change the text in cell. It's not something...

I'd love to have the protocol implemented in ipykernel; I understand that it might be difficult to have the same experience as Xeus-Python; One thing I want to avoid as...

Happy to do changes needed in IPython and reduce the size. I doubt I'll have time myself.

@martinRenou and @jasongrout you should both have received PyPI invite to be owner of `comm` (currently a dummy package), on PyPI.

No problem, thanks to you for working on this.

> If we want to show a message when dispatching to the deprecated subcommands, it's going to mean extra code to run prior to dispatching. Perhaps deprecated subcommands should be...

Actually we can just make a dummy wrapper around `'jupyter_client.kernelspecapp.KernelSpecApp'` that log a stderr message when used, and change the alias to point to the deprecated wrapper.

yes, those would be pathlib.Paths

Yeah, i'm starting to be less and less convinced about my own idea, so tagging as unsure. I doubt it is worth the effort, but I'll leave that open just...