- Implemented constrained impersonation as described in [KEP-5284](https://kep.k8s.io/5284). ([#134803](https://github.com/kubernetes/kubernetes/pull/134803), [@enj](https://github.com/enj)) [SIG API Machinery, Auth and Testing]

- Improved support for pods, service types, workload controllers and metrics/quotas to closely match the capabilities offered for Linux containers
kubernetes/enhancements: [#116](https://github.com/kubernetes/enhancements/issues/116) [[kep](https://github.com/kubernetes/enhancements/blob/master/keps/sig-windows/116-windows-node-support/README.md)]

Updated Plugin Mechanism for kubectl is Graduating to Stable ([#579](https://github.com/kubernetes/enhancements/issues/579))

  
  See here for guidance on getting permanent links to files: https://help.github.com/en/articles/getting-permanent-links-to-files
  
  Please use the following format for linking documentation:
  - [KEP]: <link>
  - [Usage]: <link>
  - [Other doc]: <link>
  --> ([#119495](https://github.com/kubernetes/kubernetes/pull/119495), [@bzsuni](https://github.com/bzsuni)) [SIG API Machinery]

- Added a `.status.features.supplementalGroupsPolicy` field to Nodes. The field is true when the feature is implemented in the CRI implementation (KEP-3619). ([#125470](https://github.com/kubernetes/kubernetes/pull/125470), [@everpeace](https://github.com/everpeace)) [SIG API Machinery, Apps, Node and Testing]

`VolumeCapacityPriority` alpha feature was replaced with this, and the default behavior was changed. The `VolumeCapacityPriority` preferred a node with the least allocatable, but the `StorageCapacityScoring` preferred a node with the maximum allocatable. See [KEP-4049](https://github.com/kubernetes/enhancements/blob/master/keps/sig-storage/4049-storage-capacity-scoring-of-nodes-for-dynamic-provisioning/README.md) for details. ([#128184](https://github.com/kubernetes/kubernetes/pull/128184), [@cupnes](https:...

- Graduated _forensic container checkpointing_ [KEP #2008](https://kep.k8s.io/2008) from Alpha to Beta. ([#123215](https://github.com/kubernetes/kubernetes/pull/123215), [@adrianreber](https://github.com/adrianreber)) [SIG Node and Testing]

an admission controller resource is being deprecated. Deployed PodSecurityPolicy's will keep working until version 1.25, their target removal from the codebase. A new feature, with a working title of "PSP replacement policy", is being developed in [KEP-2579](https://features.k8s.io/2579). To learn more, read [PodSecurityPolicy Deprecation: Past, Present, and Future](https://blog.k8s.io/2021/04/06/podsecuritypolicy-deprecation-past-present-and-future/).

### Kubernetes API Reference Documentation...

- Kubeadm: Exposed only the non-deprecated klog flags (-v and -vmodule), in line with KEP https://features.k8s.io/2845. ([#131647](https://github.com/kubernetes/kubernetes/pull/131647), [@carsontham](https://github.com/carsontham))

  Please see [the KEP](https://github.com/kubernetes/enhancements/tree/master/keps/sig-storage/1710-selinux-relabeling#story-3-cluster-upgrade) how we expect to warn users before any SELinux behavior changes and how they can opt-out before. Note that this field and feature...

- Add Overhead field to the PodSpec and RuntimeClass types as part of the Pod Overhead KEP ([#76968](https://github.com/kubernetes/kubernetes/pull/76968), [@egernst](https://github.com/egernst))

### Apps