# BACH CodeCommander [Health: Active]

**Category:** 💻 Developer Tools  
**Repository:** https://github.com/lukisch/bach-codecommander-mcp  
**GitHub Stars:** 3  
**Views:** 0  
**Installs:** 0  
**Upvotes:** 0  
**Directory Page:** https://allmcps.com/mcp/bach-codecommander

## Description
15 tools for code analysis, JSON repair, encoding fix, import organization, and PDF export.

## Claude Desktop Quick Installation
Remote MCP endpoint (confidence: high). Install path detected from listing signals. Add as a URL/SSE server in your client:

```json
"mcpServers": {
  "bach-codecommander": {
    "url": "https://raw.githubusercontent.com/ellmos-ai/.github/master/profile/logo-ellmos-codecommander.jpg"
  }
}
```

## Documentation & README

<p align="center">
  <img src="https://raw.githubusercontent.com/ellmos-ai/.github/master/profile/logo-ellmos-codecommander.jpg" alt="ellmos CodeCommander MCP emblem" width="400">
</p>

# ellmos CodeCommander MCP Server
**🇩🇪 [Deutsche Version](https://github.com/lukisch/bach-codecommander-mcp/blob/HEAD/README_de.md)**

*Part of the [ellmos-ai](https://github.com/ellmos-ai) family.*

[![License: MIT](https://img.shields.io/badge/License-MIT-yellow.svg)](https://opensource.org/licenses/MIT)
[![npm version](https://img.shields.io/npm/v/ellmos-codecommander-mcp.svg)](https://www.npmjs.com/package/ellmos-codecommander-mcp)
[![CodeCommander tests](https://github.com/ellmos-ai/ellmos-codecommander-mcp/actions/workflows/tests.yml/badge.svg)](https://github.com/ellmos-ai/ellmos-codecommander-mcp/actions/workflows/tests.yml)
[![Vitest](https://img.shields.io/badge/Vitest-187%20passed-brightgreen.svg)](https://vitest.dev/)
[![Node.js](https://img.shields.io/badge/node-%3E%3D20-brightgreen.svg)](https://nodejs.org/)
[![Platform](https://img.shields.io/badge/platform-Windows%20%7C%20macOS%20%7C%20Linux-lightgrey.svg)](https://nodejs.org/)
[![Privacy](https://img.shields.io/badge/Privacy-100%25%20Offline%20%7C%20Zero--Egress-success.svg)](SECURITY.md)
[![Security](https://img.shields.io/badge/Security-Local--First%20%7C%20Preview--Safe-blue.svg)](SECURITY.md)
[![Ecosystem](https://img.shields.io/badge/ellmos--ai-Ecosystem-blue.svg)](https://github.com/ellmos-ai)
[![Umbrella](https://img.shields.io/badge/open--bricks-Umbrella-purple.svg)](https://github.com/open-bricks)
[![LLM Indexing](https://img.shields.io/badge/LLM--Ready-llms.txt-blue.svg)](llms.txt)

> [!NOTE]
> **For AI Assistants & LLMs:** Machine-readable indexing documentation for this repository is available at [`llms.txt`](https://github.com/lukisch/bach-codecommander-mcp/blob/HEAD/llms.txt). The server exposes 23 specialized tools under the `cc_` prefix.

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

**23 tools** optimized for developers - the coding companion to [FileCommander](https://github.com/ellmos-ai/ellmos-filecommander-mcp).

**Discoverability:** Published on [npm](https://www.npmjs.com/package/ellmos-codecommander-mcp) as `ellmos-codecommander-mcp`, visible on [Glama](https://glama.ai/mcp/servers/b9kjs4uaav), and prepared for the official MCP Registry with [`server.json`](https://github.com/lukisch/bach-codecommander-mcp/blob/HEAD/server.json) under `io.github.ellmos-ai/ellmos-codecommander-mcp`. Registry and directory manifests [`server.json`](https://github.com/lukisch/bach-codecommander-mcp/blob/HEAD/server.json), [`glama.json`](https://github.com/lukisch/bach-codecommander-mcp/blob/HEAD/glama.json), [`smithery.yaml`](https://github.com/lukisch/bach-codecommander-mcp/blob/HEAD/smithery.yaml), and [`llms.txt`](https://github.com/lukisch/bach-codecommander-mcp/blob/HEAD/llms.txt) are maintained in full parity.

---

## Architecture Overview

```mermaid
graph TD
    Client["MCP Clients<br/>(Claude Desktop / Claude Code / Cursor / Windsurf)"]
    Server["ellmos CodeCommander MCP Server<br/>(stdio transport • Node.js)"]

    subgraph Tools["Developer Tool Suites (23 Tools)"]
        subgraph CodeIntel["Code & Python Intelligence"]
            C1["cc_analyze_code"]
            C2["cc_analyze_methods"]
            C3["cc_extract_classes"]
            C4["cc_check_indentation"]
            C5["cc_generate_python_code"]
            C6["cc_python_structural_edit"]
        end

        subgraph Imports["Import Management"]
            I1["cc_organize_imports"]
            I2["cc_diagnose_imports"]
            I3["cc_runtime_import_diagnose"]
        end

        subgraph Repair["Text, JSON & Encoding Repair"]
            R1["cc_fix_json"]
            R2["cc_validate_json"]
            R3["cc_fix_encoding"]
            R4["cc_cleanup_file"]
            R5["cc_fix_umlauts"]
        end

        subgraph Utility["Utilities & Conversion"]
            U1["cc_convert_format (JSON/CSV/YAML/TOML/XML/TOON)"]
            U2["cc_diff_files (Unified Diff)"]
            U3["cc_regex_test (Regex Tester)"]
            U4["cc_scan_emoji"]
            U5["cc_generate_licenses"]
        end

        subgraph Export["Export & i18n"]
            E1["cc_md_to_html"]
            E2["cc_md_to_pdf"]
            E3["cc_set_language"]
            E4["cc_get_language"]
        end
    end

    Client -->|Stdio JSON-RPC| Server
    Server --> CodeIntel
    Server --> Imports
    Server --> Repair
    Server --> Utility
    Server --> Export
```

### Code Intelligence & Safe Structural Edit Lifecycle

```mermaid
sequenceDiagram
    autonumber
    actor Developer as Developer / LLM Client
    participant Stdio as CodeCommander Server (stdio)
    participant Core as AST & Code Intelligence Core
    participant Disk as Local Filesystem

    Developer->>Stdio: cc_python_structural_edit (mode: "preview" / "apply")
    Stdio->>Core: Parse Python AST & Validate Syntax
    alt Validation Failed
        Core-->>Stdio: Syntax / Parsing Diagnostics
        Stdio-->>Developer: Error Diagnostics & Line References
    else Validation Passed
        Core->>Disk: Read Original File
        Core->>Core: Compute Unified Structural Diff
        alt Mode == "preview"
            Core-->>Stdio: Return Diff Preview (Zero File Mutations)
            Stdio-->>Developer: Structural Diff Preview
        else Mode == "apply"
            Core->>Disk: Create .bak Backup File
            Core->>Disk: Write Modified AST Code In-Place
            Core-->>Stdio: Confirmation with Applied Diff & Backup Path
            Stdio-->>Developer: Success Payload
        end
    end
```

---

## Why CodeCommander?

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

- **Python Code Analysis** - AST-based class/method extraction, complexity metrics, import analysis
- **BACH-derived Python Helpers** - runtime import diagnostics, structural edits, indentation checks, and template-based code generation
- **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](https://nodejs.org/) 20 or higher

### Option 1: Install from NPM

```bash
npm install -g ellmos-codecommander-mcp
```

### Option 2: Install from Source

```bash
git clone https://github.com/ellmos-ai/ellmos-codecommander-mcp.git
cd ellmos-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:

```json
{
  "mcpServers": {
    "codecommander": {
      "command": "ellmos-codecommander"
    }
  }
}
```

#### If installed from source:

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

### Using Both Servers Together

FileCommander and CodeCommander are designed to work side by side:

```json
{
  "mcpServers": {
    "filecommander": {
      "command": "ellmos-filecommander"
    },
    "codecommander": {
      "command": "ellmos-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, BACH guardrails |
| `cc_extract_classes` | Extract Python classes/functions as separate text blocks, optionally including pycutter-style inline content |

### Import Management (3 tools)

| Tool | Description |
|------|-------------|
| `cc_organize_imports` | Sort & deduplicate Python imports per PEP 8 |
| `cc_diagnose_imports` | Detect unused imports, duplicates, circular import risks |
| `cc_runtime_import_diagnose` | Run isolated Python runtime imports with timeouts, __init__.py analysis, and circular-import hints |

### 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 |

### Python Assistance (3 tools)

| Tool | Description |
|------|-------------|
| `cc_check_indentation` | Detect missing colons, unindented return/yield statements, and mixed tab/space indentation |
| `cc_generate_python_code` | Generate Python functions, classes, dataclasses, CLI stubs, tests, exceptions, and modules from templates |
| `cc_python_structural_edit` | Inspect and apply structural Python edits with preview, test-file, syntax-check and backup modes |

### 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: 23 developer tools** (including `cc_set_language` and `cc_get_language` for runtime language management)

---

## 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](https://github.com/lukisch/bach-codecommander-mcp/blob/HEAD/SECURITY.md) for detailed security information.

Key points:
- File-modifying tools support preview/dry-run modes where applicable
- Backup creation is enabled by default for destructive operations
- Pure stdio JSON-RPC transport with Zero-Egress guarantees
- Designed for local development use with standard unprivileged user permissions

---

## Development

```bash
npm install
npm run dev    # Watch mode
npm run build  # One-time build
npm start      # Start server
npm test       # Run test suite (vitest)
npm run test:integration  # 35 real MCP stdio assertions (after build)
npm run test:i18n         # 43 translation assertions
```

### Testing

The supported gates are deliberately separated: `npm test` runs the 187-test Vitest suite, `npm run test:integration` runs 35 real MCP stdio assertions against `dist/index.js`, and `npm run test:i18n` runs 43 translation assertions (265 automated test assertions total).

```bash
npm test                  # Run Vitest unit tests (187 tests)
npm run test:integration  # Real MCP stdio test (35 assertions, build first)
npm run test:i18n         # i18n assertions (43 assertions)
npm run test:all          # Run full test suite (build + vitest + integration + i18n)
```

Tests are verified on **Windows**, **macOS**, and **Linux**.

GitHub Actions runs the build, all three test gates (187 Vitest, 35 MCP stdio, 43 i18n assertions — 265 assertions total), and npm package check on Node.js 20, 22, and 24.

---

## Changelog

See [CHANGELOG.md](https://github.com/lukisch/bach-codecommander-mcp/blob/HEAD/CHANGELOG.md) for the full version history.

---

## License

[MIT](https://github.com/lukisch/bach-codecommander-mcp/blob/HEAD/LICENSE) - Lukas Geiger ([ellmos-ai](https://github.com/ellmos-ai))

---

## History

This project was originally developed as **BACH CodeCommander** (`bach-codecommander-mcp`). It has been renamed to **ellmos CodeCommander** (`ellmos-codecommander-mcp`) as part of the [ellmos-ai](https://github.com/ellmos-ai) organization.

The legacy package name `bach-codecommander-mcp` is deprecated. Please use [`ellmos-codecommander-mcp`](https://www.npmjs.com/package/ellmos-codecommander-mcp) instead:

```bash
npm uninstall -g bach-codecommander-mcp
npm install -g ellmos-codecommander-mcp
```

---

## ellmos-ai Ecosystem

This MCP server is part of the **[ellmos-ai](https://github.com/ellmos-ai)** ecosystem — AI infrastructure, MCP servers, and intelligent tools.

### MCP Server Family

| Server | Tools | Focus | npm |
|--------|-------|-------|-----|
| [FileCommander](https://github.com/ellmos-ai/ellmos-filecommander-mcp) | 50 | Filesystem, process management, interactive sessions, cloud-lock-safe operations | [`ellmos-filecommander-mcp`](https://www.npmjs.com/package/ellmos-filecommander-mcp) |
| **[CodeCommander](https://github.com/ellmos-ai/ellmos-codecommander-mcp)** | **23** | **Code analysis, JSON repair, imports, diffs, regex** | **[`ellmos-codecommander-mcp`](https://www.npmjs.com/package/ellmos-codecommander-mcp)** |
| [Clatcher](https://github.com/ellmos-ai/ellmos-clatcher-mcp) | 12 | File repair, format conversion, batch operations | [`ellmos-clatcher-mcp`](https://www.npmjs.com/package/ellmos-clatcher-mcp) |
| [n8n Manager](https://github.com/ellmos-ai/n8n-manager-mcp) | 19 | n8n workflow management via AI assistants | [`n8n-manager-mcp`](https://www.npmjs.com/package/n8n-manager-mcp) |
| [ControlCenter](https://github.com/ellmos-ai/ellmos-controlcenter-mcp) | 34 | MCP stack discovery, profile management, control plane | [`ellmos-controlcenter-mcp`](https://www.npmjs.com/package/ellmos-controlcenter-mcp) |
| [Homebase](https://github.com/ellmos-ai/ellmos-homebase-mcp) | 51 | Local-first LLM memory, knowledge, state, routing, swarm orchestration | [`ellmos-homebase-mcp`](https://www.npmjs.com/package/ellmos-homebase-mcp) (alpha) |
| [ServerCommander](https://github.com/ellmos-ai/ellmos-servercommander-mcp) | 8 | Server operations: health checks, log analysis, deploy dry-runs, mail diagnostics | [`ellmos-servercommander-mcp`](https://www.npmjs.com/package/ellmos-servercommander-mcp) (alpha) |
| [Blender Use](https://github.com/ellmos-ai/ellmos-blender-use-mcp) | 4 | Headless Blender asset QA and FBX reimport verification | [`ellmos-blender-use-mcp`](https://www.npmjs.com/package/ellmos-blender-use-mcp) (alpha) |
| [Open Compute](https://github.com/ellmos-ai/open-compute-mcp) | 16 | Model-agnostic computer use: capture, safety-gated actions, Windows UIA | [`open-compute-mcp`](https://www.npmjs.com/package/open-compute-mcp) (alpha) |

### Sibling Developer, File & Document Tools

| Ecosystem | Tool / Project | Focus & Capabilities |
|---|---|---|
| **ellmos-ai** | [sqlite-transit-sync](https://github.com/ellmos-ai/sqlite-transit-sync) | Offline SQLite change distribution with HMAC verification |
| **ellmos-ai** | [policy-registry](https://github.com/ellmos-ai/policy-registry) | Cryptographically signed delegation policies for AI agents |
| **ellmos-ai** | [clutch](https://github.com/ellmos-ai/clutch) | Provider-neutral LLM orchestration with auto-routing and budget tracking |
| **ellmos-ai** | [BACH](https://github.com/ellmos-ai/bach) | Local-first text-based OS for LLM agents — 113+ handlers, 550+ tools |
| **dev-bricks** | [DevCenter](https://github.com/dev-bricks/DevCenter) | PySide6 Developer Desktop Suite & offline secret vault |
| **dev-bricks** | [CodeBox](https://github.com/dev-bricks/CodeBox) | Fast desktop code snippet manager & local AST indexing |
| **dev-bricks** | [MethodenAnalyser](https://github.com/dev-bricks/MethodenAnalyser) | Method flow & complexity diagnostic engine |
| **doc-bricks** | [PDFtoPDFocr](https://github.com/doc-bricks/PDFtoPDFocr) | Desktop OCR pipeline for searchable PDFs with Tesseract |
| **doc-bricks** | [DokuReader](https://github.com/doc-bricks/DokuReader) | Multi-format document workspace & offline PDF export |
| **file-bricks** | [ProFiler](https://github.com/file-bricks/ProFiler) | Multi-pane file management & bulk batch operations |
| **open-bricks** | [open-bricks](https://github.com/open-bricks) | Umbrella organization for AI-native desktop applications |

### AI Infrastructure

| Project | Description |
|---------|-------------|
| [BACH](https://github.com/ellmos-ai/bach) | Local-first text-based OS for LLM agents — 113+ handlers, 550+ tools, SQLite memory |
| [open-compute](https://github.com/ellmos-ai/open-compute) | Model-agnostic computer-use core powering Open Compute MCP |
| [clutch](https://github.com/ellmos-ai/clutch) | Provider-neutral LLM orchestration with auto-routing and budget tracking |
| [rinnsal](https://github.com/ellmos-ai/rinnsal) | Lightweight agent memory, connectors, and automation infrastructure |
| [ellmos-stack](https://github.com/ellmos-ai/ellmos-stack) | Self-hosted AI research stack (Ollama + n8n + Rinnsal + KnowledgeDigest) |
| [MarbleRun](https://github.com/ellmos-ai/MarbleRun) | Autonomous agent chain framework for Claude Code |
| [gardener](https://github.com/ellmos-ai/gardener) | Minimalist database-driven LLM OS prototype (4 functions, 1 table) |
| [ellmos-tests](https://github.com/ellmos-ai/ellmos-tests) | Testing framework for LLM operating systems (7 dimensions) |

### Desktop Software

Our partner organization **[open-bricks](https://github.com/open-bricks)** bundles AI-native desktop applications — a modern, open-source software suite built for the age of AI. Categories include file management, document tools, developer utilities, and more.

## Liability

Dieses Projekt ist eine **unentgeltliche Open-Source-Schenkung** im Sinne der §§ 516 ff. BGB. Die Haftung des Urhebers ist gemäß **§ 521 BGB** auf **Vorsatz und grobe Fahrlässigkeit** beschränkt. Ergänzend gilt der Haftungsausschluss der MIT-Lizenz.

Nutzung auf eigenes Risiko. Keine Wartungszusage, keine Verfügbarkeitsgarantie, keine Gewähr für Fehlerfreiheit oder Eignung für einen bestimmten Zweck.

This project is an unpaid open-source donation under German law. Liability is limited to intent and gross negligence (§ 521 German Civil Code), supplemented by the MIT License warranty disclaimer. Use at your own risk.