Tiered stranger access control for AI agents. Use when setting up contact permissions, handling unknown senders, managing approved contacts, or configuring stranger deflection on messaging platforms (WhatsApp, Telegram, Discord, Signal). Provides diplomatic deflection, owner approval flow, and multi-tier access (owner/trusted/chat-only/blocked).

AI代理的分级陌生人访问控制。适用于设置联系人权限、处理未知发件人、管理已批准联系人或在消息平台（WhatsApp、Telegram、Discord、Signal）上配置陌生人拦截。提供礼貌性拦截、所有者审批流程和多级访问权限（所有者/可信/仅聊天/已阻止）。