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oldrepublicwizard

Cedardiff MCP Server

by oldrepublicwizard
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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

Related MCP server: ast-editor

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

Available Tools

1 tool
edit_fileC

Edit a file using CEDARScript syntax

ParametersJSON Schema
NameRequiredDescriptionDefault
scriptYesCEDARScript commands to execute
workingDirYesWorking directory for resolving file paths

TDQS

C2.9/5.0
Behavior2/5

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

With no annotations provided, the description carries the full burden of behavioral disclosure. It mentions 'Edit a file' which implies mutation, but fails to describe critical behaviors like permissions required, whether edits are reversible, error handling, or side effects. This leaves significant gaps for a mutation tool.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness5/5

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is a single, efficient sentence with zero waste. It is appropriately sized and front-loaded, directly stating the tool's purpose without unnecessary elaboration, making it easy to parse quickly.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness2/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

Given that this is a mutation tool with no annotations and no output schema, the description is insufficiently complete. It lacks details on behavioral traits, error conditions, return values, or practical usage context, which are critical for safe and effective tool invocation.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters3/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

The schema description coverage is 100%, so the schema already fully documents both parameters ('script' and 'workingDir'). The description adds no additional parameter semantics beyond what's in the schema, such as examples of CEDARScript commands or working directory conventions, meeting the baseline for high schema coverage.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose4/5

Does the description clearly state what the tool does and how it differs from similar tools?

The description clearly states the action ('Edit a file') and specifies the method ('using CEDARScript syntax'), providing a specific verb+resource combination. However, without sibling tools for comparison, it cannot demonstrate differentiation from alternatives, so it doesn't reach the highest score.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines2/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

The description provides no guidance on when to use this tool versus other file editing methods or alternatives. It lacks context about prerequisites, constraints, or typical use cases, offering only the basic functionality without usage context.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

Tool Schema Changelog

Recent tool additions, removals, and schema changes observed during successful MCP inspections. Dates show when Glama detected each change.

  1. 1 tool updatev1.0.0
    • First observededit_file
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TDQS

B3/5.0
Disambiguation5/5

With only one tool, there is no possibility of ambiguity or overlap between tools. The tool 'edit_file' has a clearly distinct purpose that cannot be confused with any other tool in this set.

Naming Consistency5/5

Since there is only one tool, naming consistency is inherently perfect. The tool name 'edit_file' follows a clear verb_noun pattern, and there are no other tools to cause inconsistency.

Tool Count2/5

A single tool is generally too few for most server purposes, as it limits functionality and suggests an incomplete or narrow scope. For a server named 'Cedardiff MCP Server' which implies CEDAR-related operations, one tool feels insufficient to cover typical needs like validation, querying, or other file operations.

Completeness1/5

The server is severely incomplete for its apparent domain of CEDAR operations. With only an 'edit_file' tool, there are obvious gaps such as creating, reading, validating, or deleting files, and no coverage of other CEDAR-related tasks like policy management or analysis.

Maintenance

ActivityInactive
ResponsivenessSyncing

Resources

Unclaimed servers have limited discoverability.

Looking for Admin?

If you are the server author, to access and configure the admin panel.

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