Highlights

implements to replacements value in the structured data

Now, We can edit yaml/json in yaml manifests with replacements transformer.
See #5679

For example

## source
apiVersion: v1
kind: ConfigMap
metadata:
  name: source-configmap
data:
  HOSTNAME: www.example.com
---
apiVersion: v1
kind: ConfigMap
metadata:
  name: target-configmap
data:
  config.json: |-
    {"config": {
      "id": "42",
      "hostname": "REPLACE_TARGET_HOSTNAME"
    }}

## replacement
replacements:
- source:
    kind: ConfigMap
    name: source-configmap
    fieldPath: data.HOSTNAME
  targets:
  - select:
      kind: ConfigMap
      name: target-configmap
    fieldPaths:
    - data.config\.json.config.hostname

fix: Propagate Namespace correctly to Helm

The long-standing bug where kustomize's namespace transformer did not pass namespaces to helmCharts has been fixed.
See #5940

For example

## define namespace
namespace: any-namespace

helmCharts:
- name: minecraft
  repo: https://kubernetes-charts.storage.googleapis.com
  version: v1.2.0
  # namespace: any-namespace   ## propagates without additional namespace specific
  valuesFile: values.yaml

Feature

#5679: implements to replacements value in the structured data
#5863: Add regex support for Replacement selectors
#5930: feat: add PatchArgs API type to populate patch options

fix

#5940: fix: Propagate Namespace correctly to Helm
#5971: fix: performance recession when propagating namespace to helm
#5942: fix fnplugin storagemounts validation
#5958: fix: make AbsorbAll conflict error more verbose
#5961: refactor: nested format string
#5967: Fix infinite loop in HTTP client by validating URLs before requests
#5985: fix(kyaml/yaml): minor nil safety fix for RNode.Content etc
#5991: Fix duplicate key error when adding multiple labels with --without-selector

Dependencies

#5962: chore: update dependencies from security alert
#5959: update go 1.24.6

chore

#6007: Update kyaml to v0.21.0
#6008: Update cmd/config to v0.21.0
#6009: Update api to v0.21.0