Cedardiff MCP Server

cedardiff MCP Server

Edit files with CEDARScript grammar rules

This is a TypeScript-based MCP server that implements CEDARScript, a SQL-like language for code manipulation. It provides:

A comprehensive grammar for code manipulation commands
Tools for executing CEDARScript operations
Support for complex pattern matching and transformations

Features

Grammar

SQL-like syntax for code operations (DDL, DML)
Support for file, function, class, and method targeting
Pattern matching with regex, prefix/suffix, and indentation rules
Block-level code manipulation capabilities

Tools

edit_file - Execute CEDARScript commands
- Takes script and working directory as parameters
- Supports file creation, deletion, moving, and updating
- Pattern-based code transformations

Implementation Status

Current testing has revealed:

Command parsing works correctly
Grammar supports complex operations
File writing mechanism needs improvement
Success messages returned but changes not persisted

Development

Install dependencies:

npm install

Build the server:

npm run build

For development with auto-rebuild:

npm run watch

Installation

To use with Claude Desktop, add the server config:

On MacOS: ~/Library/Application Support/Claude/claude_desktop_config.json On Windows: %APPDATA%/Claude/claude_desktop_config.json

{
  "mcpServers": {
    "cedardiff": {
      "command": "/path/to/cedardiff/build/index.js"
    }
  }
}

Debugging

Since MCP servers communicate over stdio, debugging can be challenging. We recommend using the MCP Inspector, which is available as a package script:

npm run inspector

The Inspector will provide a URL to access debugging tools in your browser.

ES Module Migration

The project has been migrated to use ES modules. Key changes include:

Added "type": "module" to package.json
Updated tsconfig.json to use "module": "ESNext"
Converted import/export statements to ES module syntax
Updated type definitions to be compatible with ES modules

Compatibility Notes

Ensure you are using Node.js version 12 or higher
Use import instead of require() for module imports
Use .js extension when importing local files

Install Server

HTTP connection URL

security – no known vulnerabilities

license - not found

quality - confirmed to work

How are these scores calculated?

local-only server

The server can only run on the client's local machine because it depends on local resources.

Tools

edit_file

Implements CEDARScript, a SQL-like language for code manipulation.

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