DSH Session Collaboration

`dsh-session-collaboration` is a plugin for DeepSeek Harness (DSH) designed to enable bidirectional context passing across multiple sessions. It implements collaboration through the `session_delegate` model tool, Host Runtime, and Web Card. Core features include relay context injection into target sessions, card navigation, and a wait-for-reply mechanism. Configuration supports cross-workspace collaboration and timeout settings. When using it, note its inherent limitations, concurrency limits, and error-handling mechanisms.