Connect Multiple DeepSeek Harness Instances via dsh-interconnect

### （注：原文开头的“dsh-interconnect”作为专有名词保留原拼写，专有译名统一符合技术文档惯例） dsh-interconnect is a DeepSeek Harness community plugin (MIT license, npm version 0.2.0) maintained by Chinesezjc. It uses a host-level HTTP/WebSocket service along with two tools, `interconnect_send` and `interconnect_ping`, to deliver messages, perform health checks, and push events bidirectionally across multiple instances and machines. This article verifies the installation command via the directory page, GitHub source code and npm, and covers the shared key `DSH_INTERCONNECT_TOKEN`, delivery semantics and precautions.