### Tools. Compiler Plugins

- [`KT-61550`](https://youtrack.jetbrains.com/issue/KT-61550) [atomicfu-compiler-plugin]: check that atomic properties are declared as private or internal val
- [`KT-58079`](https://youtrack.jetbrains.com/issue/KT-58079) K2/atomicfu: JVM IR transformer crash on atomic extension functions

- 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.

- `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`

### 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))

- In a scheduler with `Permit` plugins, when a Pod is rejected during `WaitOnPermit`, the scheduler records the plugin.
  The scheduler will use the record to honor cluster events and queueing `hints registered` for the plugin, to inform whether to retry the pod. ([#119785](https://github.com/kubernetes/kubernetes/pull/119785), [@sanposhiho](https://github.com/sanposhiho))

* 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))

* 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

- 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.