- Added new k8s.io/component-helpers repository providing shared helper code for (core) components. ([#92507](https://github.com/kubernetes/kubernetes/pull/92507), [@ingvagabund](https://github.com/ingvagabund)) [SIG Apps, Node, Release and Scheduling]

* Fix init container status reporting when active deadline is exceeded. ([#46305](https://github.com/kubernetes/kubernetes/pull/46305), [@sjenning](https://github.com/sjenning))

* Moved qos to api.helpers. ([#44906](https://github.com/kubernetes/kubernetes/pull/44906), [@k82cn](https://github.com/k82cn))

* fix kubelet event recording for selected events. ([#46246](https://github.com/kubernetes/kubernetes/pull/46246), [@derekwaynecarr](https://github.com/derekwaynecarr))
* Moved qos to api.helpers. ([#44906](https://github.com/kubernetes/kubernetes/pull/44906), [@k82cn](https://github.com/k82cn))

    assert response.json() == "foo"
    assert response.headers["content-type"] == "application/x-level-1"
    assert "x-level0" in response.headers
    assert "x-level1" in response.headers
    assert "x-level2" not in response.headers
    assert "x-level3" not in response.headers
    assert "x-level4" not in response.headers
    assert "x-level5" not in response.headers


def test_level1_default():

* Add support for declaring a `Response` parameter:
    * This allows declaring:
        * [Response Cookies](https://fastapi.tiangolo.com/advanced/response-cookies/).
        * [Response Headers](https://fastapi.tiangolo.com/advanced/response-headers/).
        * An HTTP Status Code different than the default: [Response - Change Status Code](https://fastapi.tiangolo.com/advanced/response-change-status-code/).

    /** The key of the configuration. e.g.  */
    String API_JSON_RESPONSE_HEADERS = "api.json.response.headers";

    /** The key of the configuration. e.g. false */
    String API_JSON_RESPONSE_EXCEPTION_INCLUDED = "api.json.response.exception.included";

    /** The key of the configuration. e.g.  */
    String API_GSA_RESPONSE_HEADERS = "api.gsa.response.headers";

    /** The key of the configuration. e.g. false */

* `kubectl auth reconcile` only works with rbac.v1; all the core helpers have been switched over to use the external types. ([#63967](https://github.com/kubernetes/kubernetes/pull/63967), [@deads2k](https://github.com/deads2k))

- `apiserver_dropped_requests` -> `apiserver_dropped_requests_total`
- `etcd_helper_cache_hit_count` -> `etcd_helper_cache_hit_total`
- `etcd_helper_cache_miss_count` -> `etcd_helper_cache_miss_total`
- `etcd_helper_cache_entry_count` -> `etcd_helper_cache_entry_total`
- `etcd_request_cache_get_latencies_summary` -> `etcd_request_cache_get_latency_seconds`

- 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]

- Made `kubectl-convert` binary linking static (also affects the deb and rpm packages). ([#114228](https://github.com/kubernetes/kubernetes/pull/114228), [@saschagrunert](https://github.com/saschagrunert))
- Migrated controller helper functions to use contextual logging. ([#115049](https://github.com/kubernetes/kubernetes/pull/115049), [@fatsheep9146](https://github.com/fatsheep9146))