> For the complete documentation index, see [llms.txt](https://help.screena.ai/resources/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://help.screena.ai/resources/faq/tech-stack/what-source-and-version-control-systems-are-used-to-manage-development.md).

# What source and version control systems are used to manage development?

We use:

* [GitLab](https://about.gitlab.com/) for version control, releases, milestones, internal ticketing, and documentation.
* [Sonar](https://www.sonarsource.com/) for code quality checks, such as code duplication, code complexity, and code coverage.
* [Nexus](https://www.sonatype.com/products/nexus-repository) for repository management, including artifact storage and distribution.