- Zero-value `metadata.creationTimestamp` values are now omitted and no longer serialize an explicit `null` in JSON, YAML, and CBOR output ([#130989](https://github.com/kubernetes/kubernetes/pull/130989), [@liggitt](https://github.com/liggitt)) [SIG API Machinery, Apps, Architecture, Auth, CLI, Cloud Provider, Cluster Lifecycle, Etcd,...

* 🗑️ Deprecate `ORJSONResponse` and `UJSONResponse`. PR [#14964](https://github.com/fastapi/fastapi/pull/14964) by [@tiangolo](https://github.com/tiangolo).

## 0.130.0 (2026-02-22)

### Features

* ✨ Serialize JSON response with Pydantic (in Rust), when there's a Pydantic return type or response model. PR [#14962](https://github.com/fastapi/fastapi/pull/14962) by [@tiangolo](https://github.com/tiangolo).

int(tt.y), m) if exp := natFromBytes(tt.expected).ExpandFor(m); got.Equal(exp) != 1 { t.Errorf("%d: got %v, expected %v", i, got, exp) } } } func TestModulusAndNatSiz(t *testing.T) { // These are 126 bit (2 * _W on 64-bit architectures) values, serialized as // 128 bits worth of bytes. If leading zeroes are stripped, they fit in two // limbs, if they are not, they fit in three. This can be a problem because // modulus strips leading zeroes and nat does not. m := modulusFromBytes([]byte{ 0x3f, 0xff,...

int(tt.y), m) if exp := natFromBytes(tt.expected).ExpandFor(m); got.Equal(exp) != 1 { t.Errorf("%d: got %v, expected %v", i, got, exp) } } } func TestModulusAndNatSiz(t *testing.T) { // These are 126 bit (2 * _W on 64-bit architectures) values, serialized as // 128 bits worth of bytes. If leading zeroes are stripped, they fit in two // limbs, if they are not, they fit in three. This can be a problem because // modulus strips leading zeroes and nat does not. m := modulusFromBytes([]byte{ 0x3f, 0xff,...