- The rules for incrementing `metadata.generation` of custom resources changed: ([#69059](https://github.com/kubernetes/kubernetes/pull/69059), [@caesarxuchao](https://github.com/caesarxuchao))
  - If the custom resource participates the spec/status convention, the metadata.generation of the CR increments when there is any change, except for the changes to the metadata or the changes to the status.

- Changed metadata management for Pods to populate `.metadata.generation` on writes. New pods will have a `metadata.generation` of 1; updates to mutable fields in the Pod `.spec` will result in `metadata.generation` being incremented by 1. ([#130181](https://github.com/kubernetes/kubernetes/pull/130181), [@natasha41575](https://github.com/natasha41575)) [SIG Apps, Node and Testing]

- Graduated `ResilientW...

   ([#122729](https://github.com/kubernetes/kubernetes/pull/122729), [@jparrill](https://github.com/jparrill))

* Fixes fake client generation for non-namespaced subresources ([#60445](https://github.com/kubernetes/kubernetes/pull/60445), [@jhorwit2](https://github.com/jhorwit2))
* `kubectl delete` with selection criteria defaults to ignoring not found errors ([#63490](https://github.com/kubernetes/kubernetes/pull/63490), [@deads2k](https://github.com/deads2k))

- Restore --verify-only function in code generation wrappers. ([#123261](https://github.com/kubernetes/kubernetes/pull/123261), [@skitt](https://github.com/skitt)) [SIG API Machinery]

- Fixes conversion error in multi-version custom resources that could cause metadata.generation to increment on no-op patches or updates of a custom resource. ([#88995](https://github.com/kubernetes/kubernetes/pull/88995), [@liggitt](https://github.com/liggitt)) [SIG API Machinery]

- Added scheduler preemption support for pods using `ReadWriteOncePod` PVCs ([#114051](https://github.com/kubernetes/kubernetes/pull/114051), [@chrishenzie](https://github.com/chrishenzie))
- Added the `applyconfiguration` generator to the code-generator script that generates server-side apply configuration and client APIs ([#114987](https://github.com/kubernetes/kubernetes/pull/114987), [@astefanutti](https://github.com/astefanutti))

*   Development of Kubernetes Federation has moved to [github.com/kubernetes/federation](https://github.com/kubernetes/federation). This move out of tree also means that Federation will begin releasing separately from Kubernetes. Impact:
    *   Federation-specific behavior will no longer be included in kubectl
    *   kubefed will no longer be released as part of Kubernetes

- Remove deprecated `--generator, --replicas, --service-generator, --service-overrides, --schedule` from `kubectl run`