magento-test/app/code/Magento/Csp/README.md

Magento_Csp module

Magento_Csp implements Content Security Policies for Magento. Allows CSP configuration for Merchants, provides a way for extension and theme developers to configure CSP headers for their extensions.

Extensibility

Extension developers can interact with the Magento_Csp module. For more information about the Magento extension mechanism, see Magento plugins.

The Magento dependency injection mechanism enables you to override the functionality of the Magento_Csp module.

A lot of functionality in the module is on JavaScript, use mixins to extend it.