The built-in blocks: sections, grids and spacing; headings, text, buttons, images, code and contact details; menus, the site's logo and search; and blocks that list and show collections. They're styled with Tailwind and the site's theme only.
Sites list them in goodfellow.config.tsx: blocks: { ...blocks }. Their versions for apps made with @goodfellow-cms/expo are nativeBlocks, from @goodfellow-cms/blocks/native.
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.