### API Change

- Added `ObservedGeneration` to CustomResourceDefinition conditions. ([#134984](https://github.com/kubernetes/kubernetes/pull/134984), [@michaelasp](https://github.com/michaelasp))

- Fixed broken shell completion for api resources. ([#133783](https://github.com/kubernetes/kubernetes/pull/133783), [@vpnachev](https://github.com/vpnachev)) [SIG CLI]
- Kube-apiserver: Fixed a 1.34 regression in CustomResourceDefinition handling that incorrectly warned about unrecognized formats on number and integer properties ([#133901](https://github.com/kubernetes/kubernetes/pull/133901), [@yongruilin](https://github.com/yongruilin)) [SIG API Machinery]

- CustomResourceDefinition objects created with non-empty `caBundle` fields which are invalid or do not contain any certificates will not appear in discovery or serve endpoints until a valid `caBundle` is provided. Updates to CustomResourceDefinition are no longer allowed to transition a valid `caBundle` field to an invalid `caBundle` field, because this breaks serving of the...

- Kube-apiserver: fix a possible panic validating a custom resource whose CustomResourceDefinition indicates a status subresource exists, but which does not define a `status` property in the `openAPIV3Schema` ([#135362](https://github.com/kubernetes/kubernetes/pull/135362), [@fusida](https://github.com/fusida)) [SIG API Machinery]