How does k8s-agent implement multi-cluster switching and management?

How does k8s-agent implement multi-cluster switching and management?
my k8s kubeconfig

<img width="1050" height="747" alt="Image" src="https://github.com/user-attachments/assets/1f706850-c1f8-4f29-a573-6f1c8876f713" />

<img width="1073" height="708" alt="Image" src="https://github.com/user-attachments/assets/8e578595-d6d6-4d4c-8b80-d1eacfd912eb" />