DeepSeek Harness Plugin: ZenMux Model Integration and Protocol Routing

The DeepSeek Harness (DSH) plugin `zenmux/dsh-plugins` provides users with a convenient way to access ZenMux models. The plugin enables OAuth through the browser to eliminate manual API key management, includes 150 built-in models, and supports automatic routing via the Anthropic Messages protocol (with Prompt Cache) or the OpenAI protocol. Users can interactively log in, search for, and manage models via the command line. Installation requires updating the plugin and starting the web interface, while updating requires restarting the process. The plugin also includes notes on handling network proxies, TLS interception, and resolving authentication errors.