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How to install Agentic Coding Harness in Gemini CLI

Gemini CLI was replaced by Antigravity CLI in June 2026. On an enterprise licence or paid API key you can still install Agentic Coding Harness by running "gemini mcp add agentic-coding-harness npx -y agentic-coding-harness", then type /mcp to check it.

Built from the published package · server updated 5 days ago

  1. 1

    Run the install command

    In a terminal, run:

    gemini mcp add agentic-coding-harness npx -y agentic-coding-harness
  2. 2

    Check it

    Inside Gemini CLI, type /mcp to list servers and tools.

MCP servers run with your permissions. If Agentic Coding Harness needs an API key, add it under env in the config. Check its README.

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Questions

Does Agentic Coding Harness work in Gemini CLI?

Yes. Gemini CLI supports local and remote mcp servers, extensions (legacy), and Agentic Coding Harness installs with the steps above.

Agentic Coding Harness does not show up in Gemini CLI. What now?

Restart Gemini CLI fully, check the JSON is valid, and make sure Node.js (for npx) is installed. See common MCP errors and fixes.

Is Agentic Coding Harness safe?

It scores 81 of 100. Review the code before you install it, and only give it the access it needs. Grades and details.