Programming

Calldav sucks and ActivityPub is really good. I would probably implement both - use caldav for compatibility with other software and ActivityPub for your own internal representation of the data.

But there's another option, also an industry standard, which is structurally very similar to ActivityPub only it provides more than just a network protocol to transmit data, it also provides a storage method and tools to work with it.

I am of course talking about git.

Put all your tasks/etc in a directory, use git to track and sync/backup/share changes. If you want a kan ban board, just have todo/in progress/code review/done directories and move your stuff between them.

Personally I do my note taking in VSCode with an extension that automatically (and almost instantly) commits changes and pushes them to the cloud/my other devices. Plus a few other extension like Foam which which supports linking documents/etc.

Time to start a new personal project 🙃

If you're looking to contribute to the standardization process for web standards and propose a new idea, you could try looking into discussion channels for W3C. From my understanding, they are the ones who maintain the ActivityPub/ActivityStreams standards, though I'll admit I don't know much about the process. IETF also seems to be responsible for the WebDAV RFC. You could try reaching out to them to see if they still have interest in it or a place to discuss it.

Otherwise, I don't know of any communities specific to that topic, but you could always build your own extension to WebDAV anyway. Things are created when people build them, so be the one to do it and popularize it!