Metadata-Webtool
Current Status
You can try it and the generated data should be good for submitting but the user interface is not great yet.
Original Mission
What's currently specified is just a base to create brand new netkans for not-yet-hosted mods. Eventually expanding the UI to allow editing existing metadata would be great, but is likely much more in-depth.
Primarily this is a web form which results in a JSON file that is sent in a PR to KSP-CKAN/NetKAN. Workflow is pretty heavily reliant on where a mod is hosted. Most fields are also optional. Spacedock, github, and all other hosts (curse will be a kref-able source in the near future) are the current workflow determinants.
Can I Try?
Yes, you can try a possibly outdated and maybe even broken version at https://ksp-ckan.github.io/metadata-webtool/
Can I also run the current version at my Computer?
Yes, just open static/index.html
The Python stuff (*.py) is not yet needed for trying it out but for updating data only - just run refresh_datajs.py if you want to do that.