There are two new metrics available under the Repository object in the GraphQL API:

• LastContributionDate – The most recent date there was any of the following activity: a commit to a repository’s default branch, opening an issue or discussion, answering a discussion, proposing a pull request, or submitting a pull request review. This is a good single-number metric to find projects that may be unmaintained or in need of archiving.
• CommitCount – A monotonically increasing count of the total number of commits pushed to the default branch of the repository. Tracking the change in this over time will give a sense of the overall activity in the repository.

These metrics are currently in public beta, so you will need to include a header to your GraphQL requests to opt-in:

GraphQL-Features: ospo_metrics_api

Additional documentation and context around these metrics is available in the github-ospo repo. Please provide your feedback on this discussion thread: https://github.com/orgs/community/discussions/72156