A commit to a public repository Public1 contains a pattern that matches a regular expression for secret scanning. Which party receives the first notification when the commit is made?

When a secret is detected in a public repository by GitHub's secret scanning, the first notification is sent to the relevant secret scanning partner. This is because GitHub collaborates with various service providers (partners) to invalidate or revoke the exposed secrets, such as API keys or tokens. The partner can then take immediate action to mitigate the risk associated with the leaked secret. While the administrator of the GitHub organization, the committer, and the owner of Public1 will eventually be notified and are responsible for remediation, the initial, automated notification for public repositories goes directly to the partner for rapid response and invalidation of the compromised secret.