harnss

by OpenSource03 · TypeScript · ★ 210

Open-source, desktop client/UI build to harness Claude Code, Codex and any other Agent accepting Agent Client Protocol. Run multiple AI coding agents side by side with rich tool visualization, MCP integrations, built-in terminal, git, browser and just about anything else you may need.

#agent-client-protocol#agentclientprotocol#ai#chatgpt#claude#claude-code#codex#copilot#gemini

Install

npx -y github:OpenSource03/harnss

Claude Desktop config

Add this to your claude_desktop_config.json:

{
  "mcpServers": {
    "harnss": {
      "command": "npx",
      "args": [
        "-y",
        "github:OpenSource03/harnss"
      ]
    }
  }
}

From the README

> [!WARNING] > Harnss is in early development and issues are to be expected. Please feel free to report bugs and issues in the Issues section. Harness your AI coding agents. Terminal, browser, git, and MCP integrations — all in one window. One UI - all agents. Browse entire ACP registry. Click to reveal other screenshots https://github.com/user-attachments/assets/41f5bcbc-c141-4a16-b430-79f8e01d107e Organize your projects in spaces. Every tool call beautifully visualised - even those from popular MCPs. Run multiple agent session…

Read full README on GitHub →

💡 Need a managed MCP host?

Try Claude Pro for the smoothest MCP experience, or browse our cloud-hosted servers.

Related developer tools servers

everything-claude-code

affaan-m

★ 170,676

The agent harness performance optimization system. Skills, instincts, memory, security, and research-first development for Claude Code, Codex, Opencode, Cursor and beyond.

Developer Tools · JavaScript