Front matter autocompletion?

[alexandros]

There is a third party command line tool for mass addition/removal of metadata in Hugo content files:

Hugo metadata utility

I got fed up with editing tags and categories for all my pages, so I built a utility to do mass addition/removal of metadata from the command line. As an added bonus, you can connect it to IBM Cloud and have Watson attempt to extract keywords and categories from your posts, and then interactively select which ones you want to add to each file.

I have used this tool and I vouch for it.

There is no autocomplete in Hugo I am afraid.