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:
Build the server:
For development with auto-rebuild:
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`
Debugging
Since MCP servers communicate over stdio, debugging can be challenging. We recommend using the [MCP Inspector](https://github.com/modelcontextprotocol/inspector), which is available as a package script:
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