We are working with strict coding standards and probably you should also when working with Framelix. It makes working together in modern times, where you do version control, so much easier.

All the settings we use are default shipped with PHP Storm IDE.

PHP

We try to keep the code confirm with  PSR1 and  PSR12

Javascript

We try to keep the code confirm with  StandardJs

CSS/SASS

We try to keep the code confirm with  Drupal CSS Standards