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2025-03-31

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MCP Diff Editor

A powerful MCP-integrated diff editor for modifying files with preview capabilities.

Features

  • Edit files through a web interface with real-time diff preview
  • Apply changes using unified diff format or complete file replacement
  • Create backups automatically before making changes
  • Restore from previous backups
  • View examples of common diff operations
  • Security controls to prevent unauthorized file access

Usage as MCP

The MCP diff editor provides the following methods:

start

Start the diff editor server

stop

Stop the diff editor server

status

Check server status

edit_file

Open the diff editor for a specific file

  • Parameters:
    • file_path: Path to the file to edit

apply_diff

Apply a diff to a file

  • Parameters:
    • file_path: Path to the file to modify
    • diff_content: Diff content to apply

preview_diff

Preview a diff without applying it

  • Parameters:
    • file_path: Path to the file to preview changes for
    • diff_content: Diff content to preview

Example Usage

const mcp = require('mcp');
const diffEditor = mcp.get('diff_editor');

// Start the server
await diffEditor.start();

// Open the editor for a specific file
const result = await diffEditor.edit_file({
  file_path: '/path/to/your/file.txt'
});

// Get the URL to access the editor
console.log(result.url);

// Apply a diff to a file
await diffEditor.apply_diff({
  file_path: '/path/to/your/file.txt',
  diff_content: `@@ -5,7 +5,7 @@
   <title>Sample Page</title>
 </head>
 <body>
-  <h1>Welcome to our website</h1>
+  <h1>Welcome to our awesome website!</h1>
   <p>Thanks for visiting us.</p>
 </body>
 </html>`
});

Environment Variables

  • PORT: HTTP port (default: 3009)
  • MCP_FILE_DIR: Directory to use as base for file operations (default: current directory)
  • MCP_ALLOW_ANY_PATH: Set to 'true' to allow accessing files outside the working directory

Installation

This module is intended to be used as an MCP in the /Users/samihalawa/Documents/MCP directory and should be automatically available in the MCP interface after installation.

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    Reviews

    2 (1)
    Avatar
    user_fFRME026
    2025-04-16

    As a dedicated user of the mcp-server-diff-editor, I must say this tool by samihalawa is incredibly efficient for managing server-side diff operations. Its seamless integration and user-friendly interface make it an essential resource for developers. The GitHub link provides comprehensive documentation, making it easy to get started and utilize its full potential. Highly recommended!