extrakto-kitty is a kitten for the kitty terminal. I simply took
the extrakto python script and added some glue to call fzf from the
kitten and paste the results to the command line. extrakto-kitty can be
downloaded here.
Simply copy extrakto_kitty.py to your kitty configuration directory, or
make a link to the script from there. Then you will want to add some key
mappings to the different functions in your kitty.conf. For example:
map kitty_mod+y>w kitten extrakto_kitty.py --words map kitty_mod+y>p kitten extrakto_kitty.py --paths map kitty_mod+y>u kitten extrakto_kitty.py --urls
All the code here is from laktak (extrakto), and kovidgoyal (kitty and kitten examples).