eca-1.0.x-dev/modules/workflow/config/schema/eca_workflow.schema.yml

eca.event.plugin.workflow:transition:
  type: eca.event.plugin
  label: 'Workflow Transition'
  mapping:
    type:
      type: string
      label: 'Type (and bundle)'
      constraints:
        Choice:
          callback: '\Drupal\eca\Validation\EcaConstraintCallbacks::getAllValidContentEntityTypesAndBundlesIncludeAny'
    from_state:
      type: string
      label: 'From state'
    to_state:
      type: string
      label: 'To state'

action.configuration.eca_workflow_transition:*:
  type: mapping
  label: 'Configuration for the "Workflow Transition" action'
  mapping:
    new_state:
      type: string
      label: 'New state'
    revision_log:
      type: text
      label: 'Revision Log'
    object:
      type: string
      label: 'Token name holding the entity'