See also:
- How to validate a Magento 2 extension?
- How to validate an extension against the Magento coding standards from the command line?
- Is there a PHPCS ruleset available for validating Magento 2.0 extensions with the same checks applied when extension are submitted to the Magento 2.0 marketplace?
- Where do I find the Magento Marketplace coding standards that you will be comparing me to?