This script adds catears to the users avatar, that meets certain requirements. i stole it partly from misskey. Sadly, we don't have a cat flag in our profiles in pleroma, so this script uses the displayname as well as the username to determine if a user is a cat or not.
do this in your pleroma-mods directory
sudo -u pleroma git clone https://github.com/absturztaube/pleroma-mod-catify.git
copy config.json.example to config.json
add catify to your pleroma-mod-loader config
the triggers section in the config defines which users are transformed into cats.
the mod can either choose from certain features in the display name or handle.
A little additional feature of this mod is, that it replaces な with にゃ in posts written by cats.
you can disable, enable and customize it in the nya section of config.json.
the matcher is used to determine which sections of a post will be altered. on those sections the replacer replaces the source string with the dest string.
You can find me on fediverse: @absturztaube@fedi.absturztau.be
Have fun