Peer-to-peer conversation linking for DeepSeek Harness (DSH): @-mention any session, wake it up, chat across conversations. Type @ in the composer, pick a session, send — the target agent is woken via agent.send. Persistent message board, native-feel inbox panel, 5 chat_link_* tools. dsh-plugin.
dsh plugin --profile web add github:KeFan-J/dsh-chat-link