Smalltalk Skill

Execute Smalltalk code and browse live Squeak/Cuis images via MCP.

Prerequisites

Get the ClaudeSmalltalk repo first:

git clone https://github.com/CorporateSmalltalkConsultingLtd/ClaudeSmalltalk.git

This repo contains:

• MCP server code for Squeak (MCP-Server-Squeak.st)
• Setup documentation (SQUEAK-SETUP.md, CLAWDBOT-SETUP.md)
• This Clawdbot skill (clawdbot/)

Setup

1. Set up Squeak with MCP server — see SQUEAK-SETUP.md
2. Configure Clawdbot — see CLAWDBOT-SETUP.md

Usage

# Check setup
python3 smalltalk.py --check

# Evaluate code
python3 smalltalk.py evaluate "3 factorial"
python3 smalltalk.py evaluate "Date today"

# Browse a class
python3 smalltalk.py browse OrderedCollection

# View method source
python3 smalltalk.py method-source String asUppercase

# List classes (with optional prefix filter)
python3 smalltalk.py list-classes Collection

# Get class hierarchy
python3 smalltalk.py hierarchy OrderedCollection

# Get subclasses  
python3 smalltalk.py subclasses Collection

# List all categories
python3 smalltalk.py list-categories

# List classes in a category
python3 smalltalk.py classes-in-category "Collections-Sequenceable"

# Define a new class
python3 smalltalk.py define-class "Object subclass: #Counter instanceVariableNames: 'count' classVariableNames: '' poolDictionaries: '' category: 'MyApp'"

# Define a method
python3 smalltalk.py define-method Counter "increment
    count := (count ifNil: [0]) + 1.
    ^ count"

# Delete a method
python3 smalltalk.py delete-method Counter increment

# Delete a class
python3 smalltalk.py delete-class Counter

Commands

Command	Description
--check	Verify VM/image paths and dependencies
--debug	Debug hung system (sends SIGUSR1, captures stack trace)
evaluate <code>	Execute Smalltalk code, return result
browse <class>	Get class metadata (superclass, ivars, methods)
method-source <class> <selector>	View method source code
define-class <definition>	Create or modify a class
define-method <class> <source>	Add or update a method
delete-method <class> <selector>	Remove a method
delete-class <class>	Remove a class
list-classes [prefix]	List classes, optionally filtered
hierarchy <class>	Get superclass chain
subclasses <class>	Get immediate subclasses
list-categories	List all system categories
classes-in-category <cat>	List classes in a category

Environment Variables

Variable	Description
SQUEAK_VM_PATH	Path to Squeak/Cuis VM executable
SQUEAK_IMAGE_PATH	Path to Smalltalk image with MCP server

Notes

• Requires xvfb for headless operation on Linux servers
• Uses Squeak 6.0 MCP server (GUI stays responsive if display available)
• saveImage intentionally excluded for safety