Two channels: GitHub issues for anything with a repository, x.com/mvanhorn for everything else.
Updated
Open an issue on the library repository. Name the CLI, paste the exact command you ran, say what you expected and what came back, and include the output of the CLI's version command. If the CLI talks to an API that needs a key, say whether the key was set; do not paste the key.
Open an issue on the press repository. Include the prompt you gave it, the source you pointed it at (the spec URL, the site, or the project), which step it stopped on, and the error text. A retro that names what the press should have done differently is welcome in the same issue.
Send a direct message on X to mvanhorn. That covers questions about this site, a CLI you want to see printed, or anything that does not belong in a public issue. Both channels are read.
No email address and no phone number are published for this site. GitHub issues and x.com/mvanhorn are the two channels, and they are the only two.