pharo-mcp

LLM-Pharo-MCP

A Model Context Protocol (MCP) server implementation for Pharo Smalltalk, enabling AI language models to interact with live Pharo environments through a standardized protocol.

Overview

LLM-Pharo-MCP implements the Model Context Protocol specification, providing a bridge between AI assistants (Claude, GPT, etc.) and live Pharo Smalltalk images. Through MCP, AI models can:

• Execute tools defined in Pharo (evaluate code, inspect objects, manage packages)
• Read resources exposed by the Pharo environment (system info, class hierarchies, source code)
• Use prompts for structured interactions (code review, refactoring, documentation generation)

Supported Platforms

• Pharo 13 (64-bit)
• Pharo 14 (64-bit)
• macOS, Linux, Windows

Documentation

Document	Description
Quick Start	System architecture and design decisions
Architecture	System architecture and design decisions
API Reference	Complete class and method reference
Protocol Guide	MCP protocol details and message formats
Tools Guide	How to create and register tools
Resources Guide	How to expose resources and resource templates
Prompts Guide	How to define and use prompts
Transport Guide	Transport layer configuration
Testing Guide	How to test your MCP server and extensions

MCP Protocol Version

This implementation targets MCP protocol version 2025-03-26.

Ressources

• Model Context Protocol Specification
• Pharo Smalltalk
• MCP Protocol Schema

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