Undefined As far as I know, it is not documented anywhere, but the installer supports enabling it on capsules using the `--foreman-proxy-plugin-remote-execution-script-mode`, where `async-ssh` is one of available options.
While the happy path using this mode somewhat works, but a lot of things that just work with regular ssh don't. Users who cannot rely on a connection being kept up over the whole duration of the job run would be better served by switching to pull mode.