Skills To Extensions — Development skill for Claude Code

Skills to Extensions Converter

A command-line tool to convert Anthropic Claude skills into self-contained Google Gemini extensions.

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👋 **Just a heads-up!**

This is a personal, open-source project and is not affiliated with Anthropic or Google. I built it to solve a problem I had and I hope it helps you too. It's provided "as-is" without any official support.

**And a quick security note ⚠️:** Please treat this tool as an experimental proof-of-concept. Since skills/extensions can contain code, it's wise to handle the code like any untrusted script you'd find online. For extra safety, running them in a sandbox or container is a great idea. **Use at your own risk.**

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Overview

This project provides a Python script that automates the migration of Claude skills to the Gemini extension format. It recursively finds skills, converts them, and injects a universal MCP server that allows the extension to read its own files.

Once installed in the Gemini CLI's global directory, all skills are **loaded into the model's context on startup**, giving it immediate awareness of its full range of capabilities.

Features

• Recursive Conversion: Automatically finds all valid skills (SKILL.md) in a directory and its subdirectories.
• Global Context Awareness: All installed skills are loaded on startup, allowing the model to know its full capabilities from the first prompt.
• Self-Contained Extensions: Each converted skill becomes a standalone Gemini extension with a built-in file-reading server.
• Safe and Transparent: Converts skills to a local output folder, giving you full control over the installation process.

Prerequisites

• Python (version 3.7 or higher)
• Google Gemini CLI installed and configured.
• Git installed.
• The fastmcp Python library. Install it once with