Skill Ninja MCP Server 🥷

日本語版 README

An MCP (Model Context Protocol) server for searching, installing, and managing AI Agent Skills.

Works with MCP-compatible clients like Claude Desktop, Cursor, and VS Code.

Installation

npm install -g skill-ninja-mcp-server

Or run it directly with npx:

npx skill-ninja-mcp-server

Configuration

Claude Desktop

~/.claude/claude_desktop_config.json:

{
  "mcpServers": {
    "skill-ninja": {
      "command": "npx",
      "args": ["skill-ninja-mcp-server"]
    }
  }
}

VS Code (mcp.json)

%APPDATA%\Code\User\mcp.json:

{
  "servers": {
    "skill-ninja": {
      "command": "npx",
      "args": ["skill-ninja-mcp-server"]
    }
  }
}

Environment Variables

Security

Workspace-mutating tools only operate inside trusted workspace roots.

• By default, the server trusts the current working directory only when it looks like a project root.

• To allow other locations, set the SKILL_NINJA_TRUSTED_WORKSPACES environment variable to one or more trusted roots separated by your OS path delimiter.

• Requests outside trusted roots are rejected before any read, write, or delete occurs.

• GitHub API and raw content fetches use a bounded timeout so network failures return control instead of hanging the MCP server indefinitely.

Duplicate Skill Names

• Search and recommendation results include the source name for each skill.

• If multiple sources publish the same skill name, pass the optional source field to skillNinja_install or skillNinja_localize.

• Installed skill listings include the recorded source, and the server refuses to overwrite an installed skill with the same name from a different source.

• If a partial skill name matches multiple different skills, the install, localize, and uninstall flows now stop and ask for the exact skill name instead of picking the first match.

Tools

skillNinja_install tries to fetch the original SKILL.md from the source repository. If the source file cannot be resolved or downloaded, it installs a minimal file generated from the local index and reports that fallback in the result.

Usage Examples

"Find skills for Azure work"
  -> skillNinja_search

"Install the webapp-testing skill from GitHub Awesome Copilot"
  -> skillNinja_install with skillName="webapp-testing" and source="github-awesome-copilot"

"Install test"
  -> refine to the exact skill name first, for example "test-driven-development"

"Search GitHub for MCP skills"
  -> skillNinja_webSearch

Development

git clone https://github.com/aktsmm/skill-ninja-mcp-server
cd skill-ninja-mcp-server
npm install
npm test
npm run release:verify

License

CC BY-NC-SA 4.0 — see LICENSE.