The installer could choose to run this project (just include it as a dependency of the installer) after Terminus is installed to place a .terminus-autocomplete file in the user's home directory. The instructions on adding the alias / modifying the $PATH would then need to be enhanced to advise the user to also source this file in their .bashrc file.
The project https://github.com/bamarni/symfony-console-autocomplete can be used to produce a static autocomplete file from any Symfony Console application. I tried it with Terminus, and it worked well.
The installer could choose to run this project (just include it as a dependency of the installer) after Terminus is installed to place a
.terminus-autocomplete
file in the user's home directory. The instructions on adding the alias / modifying the $PATH would then need to be enhanced to advise the user to also source this file in their .bashrc file.