This library brings together the Doctrine Annotation library to turn a Doctrine entity into an HTML form by way of Twig view helpers.
In your bootstrap file, configure the Doctrine entity manager and Twig View class provided by Slim, then invoke the SlimForm bootstrap's setup functions:
\SlimForm\Bootstrap::getInstance() ->setAnnotationReader($annotationReader) ->setView($view);
This will add the necessary template directory and twig extensions to the view object and set up the appropriate annotation readers for Doctrine.