Git Diff Reviewer MCP Server

Rich side-by-side diff viewer with syntax highlighting, unified/split view modes, and file tabs.

Features

• Side-by-side diff viewer - Compare old and new file versions in split-pane layout
• Unified diff parsing - Automatically parse and structure standard unified diff format with chunk tracking
• File tabs - Navigate between multiple changed files with visual indicators for additions/deletions
• Syntax highlighting - Language-aware highlighting for code changes across file types
• Structured change data - Line-by-line change tracking with old/new line numbers and change type classification
• Change statistics - Per-file and total counts of additions and deletions

Installation

npm install @gongrzhe/server-git-diff-reviewer

Usage

As a CLI

npx @gongrzhe/server-git-diff-reviewer

Claude Desktop Configuration

{
  "mcpServers": {
    "git-diff-reviewer": {
      "command": "npx",
      "args": ["-y", "@gongrzhe/server-git-diff-reviewer"]
    }
  }
}

Claude Code Configuration

claude mcp add git-diff-reviewer -- npx -y @gongrzhe/server-git-diff-reviewer

Tools

review-diff

Parse a unified diff and display it in an interactive side-by-side viewer.

Input:

• diff (string) - Unified diff text to parse and review

Output:

• files (array) - Array of changed files with:
  • filename - Current file name
  • oldFilename - Previous file name (if renamed)
  • chunks - Array of change hunks with line-by-line diffs
  • additions - Count of added lines
  • deletions - Count of deleted lines
• totalAdditions - Total lines added across all files
• totalDeletions - Total lines deleted across all files

Example Prompt

Review this diff:

diff --git a/src/app.ts b/src/app.ts
index abc123..def456 100644
--- a/src/app.ts
+++ b/src/app.ts
@@ -1,3 +1,4 @@
+import { Logger } from './logger';
 export class App {
-  start() {}
+  start(port = 3000) { Logger.info('started'); }
 }

License

MIT