Function isStructuredProtocolMessage

src/utils/teammateMailbox.ts:1073–1095

(messageText: string)

 * raw text in attachments and never reach their intended handlers.
 */
export function isStructuredProtocolMessage(messageText: string): boolean {
  try {
    const parsed = jsonParse(messageText)
    if (!parsed || typeof parsed !== 'object' || !('type' in parsed)) {
      return false
    }
    const type = (parsed as { type: unknown }).type
    return (
      type === 'permission_request' ||
      type === 'permission_response' ||
      type === 'sandbox_permission_request' ||
      type === 'sandbox_permission_response' ||
      type === 'shutdown_request' ||
      type === 'shutdown_approved' ||
      type === 'team_permission_update' ||
      type === 'mode_set_request' ||
      type === 'plan_approval_request' ||
      type === 'plan_approval_response'
    )
  } catch {
    return false
  }
}

/**
 * Marks only messages matching a predicate as read, leaving others unread.