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How to add Caveman to Gemini CLI as an extension with Caveman

Install the Gemini CLI extension so the same terse mode works there.

Short answer: Run gemini extensions install https://github.com/JuliusBrussee/caveman; then start gemini and type /caveman; Say stop caveman to turn it off. All steps.

Who it is forA Gemini CLI user who wants the same savings as Claude Code users.

The problemEach agent needs its own install path for skills.

The outcomeCaveman mode available inside Gemini CLI.

What you need first

  • A coding agent such as Claude Code, Codex or Gemini CLI
  • Node.js for the npx installs (22.13+ for the all-agents installer)

Steps

  1. Run gemini extensions install https://github.com/JuliusBrussee/caveman
  2. Start gemini and type /caveman
  3. Say stop caveman to turn it off

Prompt for your agent

Install JuliusBrussee/caveman as a Gemini CLI extension, confirm /caveman works, and tell me how to uninstall it.

Caveat.

Use this in your AI agent

Ask your agent

Using the Deduped MCP, get the setup steps for JuliusBrussee/caveman and "Add Caveman to Gemini CLI as an extension"

Add Deduped to Claude Code once

claude mcp add --transport http deduped https://dedupedai.com/mcp

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