Mans230/dsh-llm-cli ? reverse-engineered prompt

Build me a Node 20 plugin for DeepSeek Harness that can route model turns through local agent CLIs instead of a normal API.

I want three providers, OpenCode, Grok Build, and OpenAI Codex, each using the user’s installed CLI on the host, forwarding text as it streams, handling session workspaces, and supporting image attachments when the model can use them. If a CLI is missing, the app should be able to install it, start sign in, check status, and cancel sign in from the web UI. Please also include a usage dashboard that reads the local usage ledger and shows simple charts for usage and any budget or quota data we configure.

Make it work as a DSH plugin bundle with a browser side and a host side, and follow the README behavior for model lists, defaults, timeouts, and managed installs. If anything is unclear, look up the current CLI docs online and make sensible choices.