Twig is the name of the templating engine used by Cirrusboard. For documentation about Twig, see their website.

All pages in Cirrusboard use the twigloader() function which loads Twig along with Cirrusboard-specific extensions. Templates are read from the templates/ directory.

Previously you had to clear the template cache for changes in Twig templates to show. This is no longer necessary and changes will now take effect immediately.