cluster.fun/tekton/conditions/public-project.yaml

apiVersion: tekton.dev/v1alpha1
kind: Condition
metadata:
  name: is-public-project
  namespace: tekton-pipelines
spec:
  params:
    - name: isprivate
  check:
    image: alpine
    script: 'test $(params.isprivate) == false'
---
apiVersion: tekton.dev/v1alpha1
kind: Condition
metadata:
  name: is-private-project
  namespace: tekton-pipelines
spec:
  params:
    - name: isprivate
  check:
    image: alpine
    script: 'test $(params.isprivate) == true'