阶段1交付:services/push-gateway/docs/01-understanding.md - 8节:架构位置/限界上下文/契约/技术栈/阶段归属P5骨架/审计 - 审计16项差距(6高/5中/5低) 阶段2交付:services/push-gateway/docs/02-architecture-design.md - 13节:分层图/Connection+Hub模型/Redis key/WS端点 - 双通道协议/生命周期/心跳RFC6455/多实例PubSub - 容量目标10w+连接 AI Agent: ai01 (api-gateway/push-gateway) Branch: main Coordinator: coord