Pharo NeoConsole

A local MCP server to evaluate Pharo Smalltalk expressions and get system information viaNeoConsole.

- Python 3.10 or later
- uvpackage manager
- Pharo with NeoConsole installed
- Install Pharo and NeoConsole
- Set thePHARO_DIRenvironment variable to your Pharo installation directory (default:~/pharo)
- EnsureNeoConsole.imageis available in the Pharo directory

git clone <repository-url> cd pharo-nc-mcp-server

{ "mcpServers": { "pharo-nc-mcp-server": { "command": "uv", "args": [ "--directory", "/your-path/to/pharo-nc-mcp-server", "run", "pharo-nc-mcp-server" ] } } }

Execute Smalltalk expressions in Pharo using NeoConsole:

# Example usage in MCP client evaluate_smalltalk_with_neo_console(expression="42 factorial", command="eval")

Execute Smalltalk expressions using Pharo's simple -e option:

# Simple evaluation evaluate_simple_smalltalk(expression="Time now")

# Get system status get_pharo_metric(metric="system.status") # Get memory information get_pharo_metric(metric="memory.free")

# Get Array class comment get_class_comment(class_name="Array")

# Get Array class definition get_class_definition(class_name="Array")

Get the list of method selectors for a Pharo class:

# Get all method selectors for Array class get_method_list(class_name="Array")

Get the source code of a specific method in a Pharo class:

# Get source code for Array>>asSet method get_method_source(class_name="Array", selector="asSet")

- PHARO_DIR: Path to Pharo installation directory (default:~/pharo)

# Format code uv run black pharo_nc_mcp_server/ # Lint code uv run ruff check pharo_nc_mcp_server/ # Run tests uv run python -m pytest # Or use the test script ./scripts/test.sh

The project includes several convenience scripts in thescripts/directory:

Formats all code and documentation files in one command:

- Formats Python code using Black
- Formats markdown files using mdformat
- Runs linting checks with Ruff

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