DeepSeek Harness Plugin MCP

Made by BitFun.

MCP server that lets any agent discover, inspect, install, and run DeepSeek Harness plugins.

Catalog source: github.com/topics/dsh-plugin.

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What it does

DSH plugins are Cordis bundles (dsh.bundle.patch → cordis.patch.yml). Foreign agents speak MCP, not Cordis. This server is the inverse of @deepseek-ai/dsh-mcp-client:

UI/TUI/skin plugins are catalogued and installable. They do not become MCP tools; their UI stays in DSH.

Install

npm install -g deepseek-harness-plugin-mcp
# or
npx deepseek-harness-plugin-mcp --help

Node ^22.19 || >=24.

Wire it into an agent

Cursor / Claude Desktop / Claude Code / Codex (stdio)

{
  "mcpServers": {
    "dsh-plugins": {
      "command": "npx",
      "args": ["-y", "deepseek-harness-plugin-mcp"],
      "env": {
        "GITHUB_TOKEN": "ghp_optional_but_recommended"
      }
    }
  }
}

Enable install and runtime (this runs dsh plugin and plugin code):

{
  "mcpServers": {
    "dsh-plugins": {
      "command": "npx",
      "args": ["-y", "deepseek-harness-plugin-mcp", "--allow-install", "--allow-runtime"],
      "env": {
        "GITHUB_TOKEN": "ghp_…",
        "DSH_PLUGIN_MCP_PROFILE": "mcp-bridge"
      }
    }
  }
}

dsh must be on PATH for the profile and runtime planes.

Streamable HTTP

dsh-plugin-mcp --http --port 8765 --allow-runtime

Point the agent at http://127.0.0.1:8765/mcp. GET /health is a process liveness check.

Inside DeepSeek Harness

This package is itself a DSH bundle:

dsh plugin --profile web add github:bobleer/deepseek-harness-plugin-mcp
dsh --profile web

The live Harness then serves Streamable HTTP MCP (default http://127.0.0.1:8765/mcp) and mirrors ctx.tools — every first-party and third-party tool the composition registered.

MCP tools

Control plane:

• dsh_plugin_status / dsh_plugin_refresh_catalog / dsh_plugin_list / dsh_plugin_search
• dsh_plugin_get / dsh_plugin_inspect / dsh_plugin_readme
• dsh_plugin_list_installed / dsh_plugin_install / dsh_plugin_uninstall
• dsh_runtime_start / dsh_runtime_stop / dsh_runtime_load / dsh_runtime_unload / dsh_runtime_list_tools

After dsh_runtime_start, DSH tools appear as dsh__<name>.

Resources: dsh-plugin://catalog, dsh-plugin://github/{owner}/{repo} (+ /readme, /package.json, /cordis.patch.yml), dsh-plugin://installed/{profile}, dsh-plugin://runtime/tools.

Prompts: search-dsh-plugins, install-dsh-plugin, use-dsh-plugin.

Flags and env

Install and runtime are off until you opt in. Catalog is always available.

Typical agent flow

1. dsh_plugin_search with the task keywords.
2. dsh_plugin_inspect on owner/repo. Prefer isDshBundle: true.
3. Optional: dsh_plugin_install with github:owner/repo.
4. dsh_runtime_start with plugins: ["github:owner/repo"].
5. Call the listed dsh__* tools.

Development

npm install
npm run check

Protocol smoke (official MCP Inspector CLI, same client family as @modelcontextprotocol/sdk):

npx @modelcontextprotocol/inspector --cli node dist/cli.js --method tools/list
npx @modelcontextprotocol/inspector --cli node dist/cli.js --method tools/call \
  --tool-name dsh_plugin_status --tool-args-json '{}'

Design: docs/design.md.

License

MIT