BACH CodeCommander MCP Server

A developer-focused Model Context Protocol (MCP) server that gives AI assistants code analysis, JSON repair, encoding fix, import organization, format conversion, file diff, and regex testing capabilities.

17 tools optimized for developers - the coding companion to FileCommander.

Why CodeCommander?

While FileCommander handles filesystem operations, CodeCommander focuses on code intelligence:

• Python Code Analysis - AST-based class/method extraction, complexity metrics, import analysis
• JSON Repair - Fix broken JSON automatically (trailing commas, single quotes, BOM, comments)
• Import Organization - Sort and deduplicate Python imports per PEP 8
• Encoding Fix - Repair Mojibake and double-encoded UTF-8 (27+ patterns)
• Umlaut Repair - Fix broken German characters (70+ patterns)
• Format Conversion - Convert between JSON, CSV, INI, YAML, TOML, XML, and TOON
• File Diff - Compare two files with unified diff output (LCS algorithm)
• Regex Tester - Test regular expressions with match details, groups, and replace preview
• Markdown Export - Convert Markdown to professional HTML/PDF with code blocks, tables, nested lists, blockquotes
• Cross-platform - Works on Windows, macOS, and Linux

Installation

Prerequisites

• Node.js 18 or higher

Option 1: Install from NPM

npm install -g bach-codecommander-mcp

Option 2: Install from Source

git clone https://github.com/lukisch/bach-codecommander-mcp.git
cd bach-codecommander-mcp
npm install
npm run build

Configuration

Claude Desktop

Add to your claude_desktop_config.json:

Windows: %APPDATA%\Claude\claude_desktop_config.json macOS: ~/Library/Application Support/Claude/claude_desktop_config.json

If installed globally via NPM:

{
  "mcpServers": {
    "codecommander": {
      "command": "bach-codecommander"
    }
  }
}

If installed from source:

{
  "mcpServers": {
    "codecommander": {
      "command": "node",
      "args": ["/absolute/path/to/bach-codecommander-mcp/dist/index.js"]
    }
  }
}

Using Both Servers Together

FileCommander and CodeCommander are designed to work side by side:

{
  "mcpServers": {
    "filecommander": {
      "command": "bach-filecommander"
    },
    "codecommander": {
      "command": "bach-codecommander"
    }
  }
}

Tools Overview

Code Analysis (3 tools)

| Tool | Description | |------|-------------| | cc_analyze_code | Full code analysis: classes, functions, imports, LOC, complexity | | cc_analyze_methods | Detailed method analysis: params, decorators, visibility, data flow | | cc_extract_classes | Extract Python classes/functions as separate text blocks |

Import Management (2 tools)

| Tool | Description | |------|-------------| | cc_organize_imports | Sort & deduplicate Python imports per PEP 8 | | cc_diagnose_imports | Detect unused imports, duplicates, circular import risks |

JSON Tools (2 tools)

| Tool | Description | |------|-------------| | cc_fix_json | Repair broken JSON (BOM, trailing commas, comments, single quotes) | | cc_validate_json | Validate JSON with detailed error position and context |

Encoding & Text (3 tools)

| Tool | Description | |------|-------------| | cc_fix_encoding | Fix Mojibake / double-encoded UTF-8 (27+ patterns) | | cc_cleanup_file | Remove BOM, NUL bytes, trailing whitespace, normalize line endings | | cc_fix_umlauts | Repair broken German umlauts (70+ patterns, HTML entities, escapes) |

Scanning (1 tool)

| Tool | Description | |------|-------------| | cc_scan_emoji | Scan files for emojis with codepoint info |

Format & Documentation (2 tools)

| Tool | Description | |------|-------------| | cc_convert_format | Convert between JSON, CSV, INI, YAML, TOML, XML, and TOON formats | | cc_generate_licenses | Generate third-party license file (npm/pip) |

Developer Utilities (2 tools)

| Tool | Description | |------|-------------| | cc_diff_files | Compare two files with unified diff output (configurable context lines) | | cc_regex_test | Test regex patterns against text/files with match details, groups, and replace preview |

Export (2 tools)

| Tool | Description | |------|-------------| | cc_md_to_html | Markdown to standalone HTML with CSS styling (headers, code blocks, tables, nested lists, blockquotes, images, checkboxes) | | cc_md_to_pdf | Markdown to PDF via headless browser (Edge/Chrome). Falls back to HTML if no browser is available |

Total: 17 tools

Shared Tools

7 tools exist in both FileCommander and CodeCommander for convenience:

| FileCommander | CodeCommander | Function | |---------------|---------------|----------| | fc_fix_json | cc_fix_json | JSON repair | | fc_validate_json | cc_validate_json | JSON validation | | fc_fix_encoding | cc_fix_encoding | Encoding repair | | fc_cleanup_file | cc_cleanup_file | File cleanup | | fc_convert_format | cc_convert_format | Format conversion (JSON/CSV/INI/YAML/TOML/XML/TOON) | | fc_md_to_html | cc_md_to_html | Markdown to HTML export | | fc_md_to_pdf | cc_md_to_pdf | Markdown to PDF export |

Tool Prefix

All tools use the cc_ prefix (CodeCommander) to avoid conflicts with FileCommander's fc_ prefix and other MCP servers.

Security

See SECURITY.md for detailed security information.

Key points:

• All file-modifying tools support dry_run mode
• Backup creation is enabled by default for destructive operations
• No built-in sandboxing - security is delegated to the MCP client
• Designed for local development use via stdio transport

Development

npm install
npm run dev    # Watch mode
npm run build  # One-time build
npm start      # Start server

Changelog

See CHANGELOG.md for the full version history.

License

MIT - Lukas (BACH)