metadata:
  case_id: letter-ada-001
schema:
  type: object
  required: [recipient, sender]
  properties:
    recipient:
      type: object
      required: [name]
    sender:
      type: object
      required: [name, email]
context:
  recipient:
    name: Ada Lovelace
    relationship: research collaborator
  sender:
    name: Markitect Team
    email: hello@example.com