- kube-scheduler dropped support for configuration files with apiVersion `componentconfig/v1alpha1`. Ensure kube-scheduler is configured using command-line flags or a configuration file with apiVersion `kubescheduler.config.k8s.io/v1alpha1` before upgrading to 1.13.
- kubectl

### SIG Cluster Lifecycle

- Kubeadm: deprecate self-hosting support. The experimental command "kubeadm alpha self-hosting" is now deprecated and will be removed in a future release. ([#95125](https://github.com/kubernetes/kubernetes/pull/95125), [@neolit123](https://github.com/neolit123)) [SIG Cluster Lifecycle]

- Added label selector flag to all `kubectl rollout` commands. ([#99758](https://github.com/kubernetes/kubernetes/pull/99758), [@aramperes](https://github.com/aramperes))
- Added more message for no PodSandbox container. ([#107116](https://github.com/kubernetes/kubernetes/pull/107116), [@yxxhero](https://github.com/yxxhero))

- Kubeadm: remove the deprecated command `kubeadm config view`. A replacement for this command is `kubectl get cm -n kube-system kubeadm-config -o=jsonpath="{.data.ClusterConfiguration}"` ([#102071](https://github.com/kubernetes/kubernetes/pull/102071), [@neolit123](https://github.com/neolit123))

- [`KT-63789`](https://youtrack.jetbrains.com/issue/KT-63789) Native: Incremental compilation problem with compose

### Tools. CLI

- [`KT-64485`](https://youtrack.jetbrains.com/issue/KT-64485) CLI: cache and optimize parsing of command-line arguments

### Tools. Gradle

- [`KT-63990`](https://youtrack.jetbrains.com/issue/KT-63990) "Cannot query the value of property 'buildFlowServiceProperty' because it has no value available" with Isolated Projects

- `--log-flush-frequency` had no effect in several commands or was missing. Help and warning texts were not always using the right format for a command (`add_dir_header` instead of `add-dir-header`). Fixing this included cleaning up flag handling in component-base/logs: that package no longer adds flags to the global flag sets. Commands which want the klog and `--log-flush-frequency` flags must explicitly call `logs.AddFlags`; the new `cli.Run`...

- `pod.Spec.RuntimeClassName` field is now available in kubectl describe command. ([#110914](https://github.com/kubernetes/kubernetes/pull/110914), [@yeahdongcn](https://github.com/yeahdongcn))

### Other (Cleanup or Flake)

* add  `kubectl replace --raw` and `kubectl delete --raw` to have parity with create and get ([#79724](https://github.com/kubernetes/kubernetes/pull/79724), [@deads2k](https://github.com/deads2k))
* E2E tests no longer add command line flags directly to the command line, test suites that want that need to be updated if they don't use HandleFlags ([#75593](https://github.com/kubernetes/kubernetes/pull/75593), [@pohly](https://github.com/pohly))

- Alpha implementation of Kubectl Command Headers: SIG CLI KEP 859 enabled when KUBECTL_COMMAND_HEADERS environment variable set on the client command line.
  - To enable: export KUBECTL_COMMAND_HEADERS=1; kubectl ... ([#98952](https://github.com/kubernetes/kubernetes/pull/98952), [@seans3](https://github.com/seans3)) [SIG API Machinery and CLI]