Syd Upstream is a full D9 install for Pantheon, providing a complete Drupal setup & basic config to reduce time spent doing repetitive install & setup tasks common to all D9 sites
It includes a comprehensive set of modules alongside a default admin theme (Adminimal) & base theme
Features
Removal of unnecessary default Drupal modules & settings
Removal of default content types, leaving page and homepage.
Creation of standard content toolkit entities (more info)
Text formats / WYSIWYG setup & config
Editor, Super Editor & Administrator roles setup & given basic permissions
Default node path structure setup
Basic user account settings configured
Time/date settings configured
XML sitemap installed & configured
Default Drupal admin paths changed for security (from /user to /member)