- Improved how the API server responds to **list** requests where the response format negotiates to Protobuf. List responses in Protobuf are marshalled one element at the time, drastically reducing memory needed to serve large collections. Streaming list responses can be disabled via the `StreamingCollectionEncodingToProtobuf` feature gate. ([#129407](https://github.com/kubernetes/kubernetes/pull/129407), [@serathius](https://github.com/serathius)) [SIG API Machinery, Apps, Architecture,...

- Added new functionality to the Go client code (`client-go`) library. The `List()` method for the metadata client allows enabling API streaming when fetching collections; this improves performance when listing many objects.

        not(not -> not.setId_Term(id), opLambda);
    }

    public void setId_Terms(Collection<String> idList) {
        setId_Terms(idList, null);
    }

    public void setId_Terms(Collection<String> idList, ConditionOptionCall<IdsQueryBuilder> opLambda) {
        IdsQueryBuilder builder = regIdsQ(idList);
        if (opLambda != null) {

- Fixed a bug in the API server where empty collections of ValidatingAdmissionPolicies did not have an `items` field. ([#124568](https://github.com/kubernetes/kubernetes/pull/124568), [@xyz-li](https://github.com/xyz-li)) [SIG API Machinery]

## Changelog since v1.29.7

## Changes by Kind

### API Change

- Fixed a bug in the API server where empty collections of ValidatingAdmissionPolicies did not have an `items` field. ([#126157](https://github.com/kubernetes/kubernetes/pull/126157), [@xyz-li](https://github.com/xyz-li)) [SIG API Machinery]

## Changelog since v1.30.3

## Changes by Kind

### API Change

- Fixed a bug in the API server where empty collections of ValidatingAdmissionPolicies did not have an `items` field. ([#126146](https://github.com/kubernetes/kubernetes/pull/126146), [@xyz-li](https://github.com/xyz-li)) [SIG API Machinery]

## Changelog since v1.28.12

## Changes by Kind

### API Change

- Fixed a bug in the API server where empty collections of ValidatingAdmissionPolicies did not have an `items` field. ([#126159](https://github.com/kubernetes/kubernetes/pull/126159), [@xyz-li](https://github.com/xyz-li)) [SIG API Machinery]

* Update Calico version to v2.6.6 ([#58482](https://github.com/kubernetes/kubernetes/pull/58482), [@tmjd](https://github.com/tmjd))
* Fix garbage collection and resource quota when the controller-manager uses --leader-elect=false ([#57340](https://github.com/kubernetes/kubernetes/pull/57340), [@jmcmeek](https://github.com/jmcmeek))

* custom resources that use unconventional pluralization now work properly with kubectl and garbage collection ([#50012](https://github.com/kubernetes/kubernetes/pull/50012), [@deads2k](https://github.com/deads2k))

* Fix a bug affecting nested data volumes such as secret, configmap, etc. ([#57422](https://github.com/kubernetes/kubernetes/pull/57422), [@joelsmith](https://github.com/joelsmith))
* Fix garbage collection and resource quota when the controller-manager uses --leader-elect=false ([#57340](https://github.com/kubernetes/kubernetes/pull/57340), [@jmcmeek](https://github.com/jmcmeek))