Prevent Use of Default Project

apiVersion: kyverno.io/v1
kind: ClusterPolicy
metadata:
  name: application-prevent-default-project
  annotations:
    policies.kyverno.io/title: Prevent Use of Default Project
    policies.kyverno.io/category: Argo
    policies.kyverno.io/severity: medium
    kyverno.io/kyverno-version: 1.6.2
    policies.kyverno.io/minversion: 1.6.0
    kyverno.io/kubernetes-version: "1.23"
    policies.kyverno.io/subject: Application
    policies.kyverno.io/description: This policy prevents the use of the default project in an Application.
spec:
  validationFailureAction: Audit
  background: true
  rules:
    - name: default-project
      match:
        any:
          - resources:
              kinds:
                - Application
      preconditions:
        all:
          - key: "{{ request.operation || 'BACKGROUND' }}"
            operator: NotEquals
            value: DELETE
      validate:
        message: The default project may not be used in an Application.
        pattern:
          spec:
            project: "!default"