phpBB’s coding guidelines are maintained in its source code repository. You can find the latest versions on area51:
These documents are automatically updated when changes are made to them.
CSS & SCSS Linting¶
We use stylelint for checking the quality, linting, and ensuring consistent CSS code standards. There is a .stylelintrc file in the root of the project, and your editor probably has a plugin available which will show you when you violate these standards.
We employ a set of standards loosely based on the following widely used CSS Guidelines