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stage: Govern
group: Authentication
info: To determine the technical writer assigned to the Stage/Group associated with this page, see https://about.gitlab.com/handbook/product/ux/technical-writing/#assignments
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# Permission development guidelines

There are multiple types of permissions across GitLab, and when implementing
anything that deals with permissions, all of them should be considered. For more information, see:

- [Predefined roles system](permissions/predefined_roles.md): a general overview about predefined roles, user types, feature specific permissions or permissions dependencies.
- [Authorizations](permissions/authorizations.md): guidance on where to check permissions.
- [Custom roles](permissions/custom_roles.md): guidance on how to work on custom role, how to introduce a new ability for custom roles, how to refactor permissions.