### SIG CLI

- Added a sample-cli-plugin staging repository and cli-runtime staging repository to help showcase the new kubectl plugins mechanism. ([#67938](https://github.com/kubernetes/kubernetes/pull/67938), [#67658](https://github.com/kubernetes/kubernetes/pull/67658), [@soltysh](https://github.com/soltysh))

- The scheduler skips the `InterPodAffinity` Score plugin when nothing to do with the Pod.
  It will affect some metrics values related to the InterPodAffinity Score plugin. ([#117794](https://github.com/kubernetes/kubernetes/pull/117794), [@utam0k](https://github.com/utam0k)) [SIG Scheduling]
- The scheduler skips the `PodTopologySpread` Filter plugin if no spread constraints.

- [migration phase 1] PodFitsHostPorts as filter plugin ([#83659](https://github.com/kubernetes/kubernetes/pull/83659), [@wgliang](https://github.com/wgliang))
- [migration phase 1] PodFitsResources as framework plugin ([#83650](https://github.com/kubernetes/kubernetes/pull/83650), [@wgliang](https://github.com/wgliang))

* Added support to a hierarchy of kubectl plugins (a tree of plugins as children of other plugins). ([#45981](https://github.com/kubernetes/kubernetes/pull/45981), [@fabianofranz](https://github.com/fabianofranz))
    * Added exported env vars to kubectl plugins so that plugin developers have access to global flags, namespace, the plugin descriptor and the full path to the caller binary.

      - `kubelet_runtime_operations_errors` -> `kubelet_runtime_operations_errors_total`
      - `kubelet_device_plugin_registration_count` -> `kubelet_device_plugin_registration_total`
      - `kubelet_device_plugin_alloc_latency_microseconds` -> `kubelet_device_plugin_alloc_duration_seconds`
      - `scheduler_e2e_scheduling_latency_microseconds` -> `scheduler_e2e_scheduling_duration_seconds`

- Scheduler no longer runs the plugin's `Filter` method when its `PreFilter` method returned a Skip status.
  In other words, your `PreFilter`/`Filter` plugin can return a Skip status in `PreFilter` if the plugin does nothing in Filter for that Pod.
  Scheduler skips `NodeAffinity` Filter plugin when `NodeAffinity` Filter plugin has nothing to do with a Pod.

* Fix issue where on re-registration of device plugin, `allocatable` was not getting updated. This issue makes devices invisible to the Kubelet if device plugin restarts. Only work-around, if this fix is not there, is to restart the kubelet and then start device plugin. ([#63118](https://github.com/kubernetes/kubernetes/pull/63118), [@vikaschoudhary16](https://github.com/vikaschoudhary16))

* Fix issue where on re-registration of device plugin, `allocatable` was not getting updated. This issue makes devices invisible to the Kubelet if device plugin restarts. Only work-around, if this fix is not there, is to restart the kubelet and then start device plugin. ([#63118](https://github.com/kubernetes/kubernetes/pull/63118), [@vikaschoudhary16](https://github.com/vikaschoudhary16))

- When a CNI plugin returns dual-stack pod IPs, kubelet will now try to respect the
  "primary IP family" of the cluster by picking a primary pod IP of the same family
  as the (primary) node IP, rather than assuming that the CNI plugin returned the IPs
  in the order the administrator wanted (since some CNI plugins don't allow

- `kubelet_runtime_operations_errors` -> `kubelet_runtime_operations_errors_total`
- `kubelet_device_plugin_registration_count` -> `kubelet_device_plugin_registration_total`
- `kubelet_device_plugin_alloc_latency_microseconds` -> `kubelet_device_plugin_alloc_duration_seconds`
- `docker_operations` -> `docker_operations_total`
- `docker_operations_latency_microseconds` -> `docker_operations_latency_seconds`