Alfons 5.2 introduced dynamic shell autocompletion. That means that on most shells (but especially Zsh), you will get completions for tasks, task options and maybe even task values.
The Bash completion script is very poor. This is because Bash's autocompletion is very poor. It will list the available tasks, and if it can detect a task, also suggest the options for that task.
# cp bin/completion.bash /etc/bash_completion.d/alfons
Zsh will autocomplete tasks, task options, and for certain task options, also suggest values.
If a task option has a value of <file>, <user>, <group> or <path>, it will use Zsh's internal resolvers to complete suggestions.
Move the completion file to anywhere in your $FPATH.
# Oh my Zsh!
$ cp bin/completion.zsh $HOME/.oh-my-zsh/completions/_alfons
# Hopefully cross platform
$ sudo cp bin/completion.zsh /usr/share/zsh/functions/Completion/_alfons