The AI assistant: it drafts and rewrites pages with Claude, OpenAI or a free AI service, called straight from the editor's browser with the editor's own key (or, on a full-stack site, through its server with the site's key, aiServer()), and finds openly licensed photos for it on Openverse.
The admin panel uses it; sites don't need to depend on it themselves.
Goodfellow is a website builder for people who aren't developers, with no server or database: pages are files in your own GitHub, GitLab or Bitbucket repository, edited in a visual editor built on Puck. To start a new site, run npm create goodfellow@latest my-site. See the documentation for everything else.