protoc-gen-mcp-skill

protoc-gen-mcp-skill

An intelligent agent skill to help AI agents like Cursor, Copilot, and Claude Code write, generate, and manage Model Context Protocol (MCP) servers using protoc-gen-mcp and easyp.

This skill teaches agents to use .proto files as the single source of truth for generating type-safe Go MCP tools, ensuring strict schemas.

Installation

You can install this skill globally for your agent (e.g., Cursor, Claude Code) using the Vercel skills CLI.

First, ensure you have the skills CLI available via npx:

npx skills add easyp-tech/protoc-gen-mcp-skill -g

Note: Replace easyp-tech with the correct GitHub username/organization if using a fork.

Local Project Installation

To install this skill specifically for a single project (rather than globally):

npx skills add easyp-tech/protoc-gen-mcp-skill

What This Skill Does

By installing this skill, your AI agent will gain expert-level understanding of:

• Defining MCP Tools in Protobuf: Annotating RPC methods, types, and fields using mcp.options.v1.
• Generating Go Bindings: Configuring easyp.yaml to generate *.pb.go and *.mcp.go.
• Implementing Handlers: Writing the generated Go server interfaces (<Service>ToolHandler).
• MCP Constraints & Mappings: Knowing precisely how Protobuf maps to JSON Schema validation for MCP clients.

Development & Usage

The core instructions are located in skills/protoc-gen-mcp/SKILL.md. Agents will automatically parse these instructions and apply them when you ask tasks like:

• "Generate an MCP tool from my exist proto file."
• "What is the correct way to add a required field constraint to an MCP tool?"
• "Setup easyp to generate protoc-gen-mcp bindings."

License

This project is licensed under the MIT License - see the LICENSE file for details.