I use recommended composer.json structure:
{
"name": "acme/boilerplate-theme",
"type": "october-theme",
"description": "Enter a meaningful description here",
"require": {
"composer/installers": "~1.0"
}
}
It worked well, but several weeks ago:
the only possibility to install via command line with --want=dev-main parameter.
I have private repository on GIT, main default branch
The same situation is for plugin and theme