- [CONTRIBUTING.md](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/CONTRIBUTING.md) main contributing guide
- [PROCESS.md](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/PROCESS.md) contributing process
- [GitLab Development Kit (GDK)](https://gitlab.com/gitlab-org/gitlab-development-kit/blob/master/doc/howto/README.md) to install a development version
## Styleguides
- [Documentation styleguide](doc_styleguide.md) Use this styleguide if you are
contributing to documentation.
- [SQL Migration Style Guide](migration_style_guide.md) for creating safe SQL migrations
- [Testing standards and style guidelines](testing.md)
- [UI guide](ui_guide.md) for building GitLab with existing CSS styles and elements