Default community health files are a set of predefined files that provide guidance and templates for maintaining a healthy and collaborative open source project. You can add default community health files to a public repository called .github, in the root of the repository or in the docs or .github folders. These files help you automate and standardize various aspects of your project's development and community interaction. They are essential for promoting transparency, good practices, and collaboration in open source projects.

See the full docs at Creating a default community health file