Fisher is a plugin manager for the fish shell. It is capable of installing a wide range of useful plugins. The installation process is described in the GitHub README.

Once the Fisher plugin has been installed, the following commands can be used to install, remove, update, and list other plugins.

# install
fisher install jorgebucaran/nvm.fish
 
# remove
fisher remove jorgebucaran/nvm.fish
 
# update
fisher update jorgebucaran/nvm.fish
 
# list
fisher list

References