Plonecli default option for addon template

I am using:

    plonecli : 3.0
    bobtemplates.plone: 8.0.0

bobtemplates.plone is creating addon packages using cookieplone. However, the default cookieplone addon template enables plone.volto profile in metadata.xml. If I run cookieplone, its TUI offers a prompt to select which template to use (Volto or ClassicUI). How can I pass my preferred option to plonecli? Is this set in ~/.mrbob file? What variable do I need to set?

I dove into the source code and custom variables are not supported in the version of plonecli I am using. Plonecli generates an answers.json file and passes it on to cookieplone. Some of the values are taken from ~/.mrbob but custom options there are not included.

The variable to set is feature_headless.

I tested an answere.json with values:

{"default_context": {"title": "test.app", "python_package_name": "test.app", "author": "Test Co", "email": "``inquiry@testco.com``", "github_organization": "NA", "plone_version": "6.2.0","feature_headless": "0"}}

I used the above and passed it on to cookieplone directly.

uvx cookieplone backend_addon --no-input --config-file answers.json