There are 3 repositories under magento-certified-developer topic.
Preparation notes for Magento 2 Certified Professional Developer exam
Preparation notes for Magento 2 Certified Professional Cloud Developer exam
šMagento 2 Certified Professional Developer Plus Exam
It is a guide which helps with preparation to certification the Adobe Certified Professional - Adobe Commerce Developer with Cloud Add-on.
magento2 auto generate sku for new product