% incus admin os application add -d '{"name":"htop"}'
WARNING: The IncusOS API and configuration is subject to change
Error: unknown application
As I understand, the IncusOS application is called debug and htop is one of the packages installed by this application. Beisdes, the add command just adds an application, it does not execute it.
Installing the debug application doesn’t expose anything new on the API.
It’s primarily meant for the developers working on IncusOS itself so we can load that additional software to be run from a development shell like what you can get when running IncusOS on top of Incus.