diff --git a/CLAUDE.md b/CLAUDE.md
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+# CLAUDE.md
+
+This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.
+
+## Project Overview
+
+JBZoo Toolbox-Dev is a developer toolbox library that provides development dependencies and debugging utilities for JBZoo libraries on GitHub. It primarily serves as a development-only package to standardize debugging and development tools across JBZoo projects.
+
+## Core Architecture
+
+### Minimal Library Structure
+This is a lightweight library with minimal source code:
+- `src/var-dumper.php` - Main functionality: customized Symfony VarDumper configuration
+- The library primarily serves as a composer dependency aggregator for development tools
+
+### Symfony VarDumper Integration
+The main feature is a customized VarDumper configuration that:
+- Outputs to `php://stderr` instead of `php://stdout` to avoid breaking main script output during debugging
+- Optimized for CLI debugging with 16KB string limit
+- Configures classic indentation style and UTF-8 encoding
+- Disables PhpStorm file links for broader compatibility
+
+### Dependency Management
+Acts as a meta-package providing standardized versions of:
+- `jbzoo/phpunit` - PHPUnit testing framework extensions
+- `jbzoo/codestyle` - Code quality and linting tools
+- `jbzoo/markdown` - Markdown processing utilities
+- `symfony/var-dumper` - Enhanced debugging output
+- `php-coveralls/php-coveralls` - Coverage reporting
+- `fakerphp/faker` - Test data generation
+
+## Common Commands
+
+### Development Setup
+```bash
+make update     # Install/update all dependencies via composer
+```
+
+### Testing and Quality Assurance
+```bash
+make test-all   # Run both PHPUnit tests and all code style checks
+make test       # Run PHPUnit tests only
+make codestyle  # Run all code quality tools (inherited from jbzoo/codestyle)
+```
+
+## Dependencies and Integration
+
+### JBZoo Ecosystem Integration
+This package includes JBZoo's standardized toolchain via the Makefile system:
+- Inherits comprehensive make targets from `jbzoo/codestyle`
+- Provides unified development environment across JBZoo projects
+- Acts as a single dependency to pull in all necessary development tools
+
+### PHP Version Requirements
+- PHP 8.2+ required
+- Compatible with PHP 8.3 and 8.4 (tested in CI)
+
+### Testing Framework
+Uses JBZoo's extended PHPUnit framework:
+- Tests extend `JBZoo\PHPUnit\PHPUnit` base class
+- Test files in `tests/` directory with `*Test.php` naming pattern
+- PHPUnit configuration in `phpunit.xml.dist`
+
+## Usage Pattern
+
+This package is typically included as a development dependency in other JBZoo projects:
+```json
+{
+    "require-dev": {
+        "jbzoo/toolbox-dev": "^7.0"
+    }
+}
+```
+
+The VarDumper configuration is automatically loaded via Composer's `files` autoloader, providing enhanced debugging capabilities across all JBZoo projects without additional setup.
+
+## Key Files
+
+- `composer.json` - Defines dependencies and autoload configuration
+- `Makefile` - Minimal makefile that includes JBZoo codestyle system
+- `src/var-dumper.php` - Main functionality for debugging enhancements
+- `phpunit.xml.dist` - PHPUnit configuration with coverage reporting
\ No newline at end of file
diff --git a/README.md b/README.md
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+++ b/README.md
@@ -3,15 +3,78 @@
 [![CI](https://github.com/JBZoo/Toolbox-Dev/actions/workflows/main.yml/badge.svg?branch=master)](https://github.com/JBZoo/Toolbox-Dev/actions/workflows/main.yml?query=branch%3Amaster)    [![Coverage Status](https://coveralls.io/repos/github/JBZoo/Toolbox-Dev/badge.svg?branch=master)](https://coveralls.io/github/JBZoo/Toolbox-Dev?branch=master)    [![Psalm Coverage](https://shepherd.dev/github/JBZoo/Toolbox-Dev/coverage.svg)](https://shepherd.dev/github/JBZoo/Toolbox-Dev)    [![Psalm Level](https://shepherd.dev/github/JBZoo/Toolbox-Dev/level.svg)](https://shepherd.dev/github/JBZoo/Toolbox-Dev)    [![CodeFactor](https://www.codefactor.io/repository/github/jbzoo/toolbox-dev/badge)](https://www.codefactor.io/repository/github/jbzoo/toolbox-dev/issues)
 [![Stable Version](https://poser.pugx.org/jbzoo/toolbox-dev/version)](https://packagist.org/packages/jbzoo/toolbox-dev/)    [![Total Downloads](https://poser.pugx.org/jbzoo/toolbox-dev/downloads)](https://packagist.org/packages/jbzoo/toolbox-dev/stats)    [![Dependents](https://poser.pugx.org/jbzoo/toolbox-dev/dependents)](https://packagist.org/packages/jbzoo/toolbox-dev/dependents?order_by=downloads)    [![GitHub License](https://img.shields.io/github/license/jbzoo/toolbox-dev)](https://github.com/JBZoo/Toolbox-Dev/blob/master/LICENSE)
 
+Developer toolbox library that provides standardized development dependencies and debugging utilities for JBZoo projects on GitHub.
 
+## Features
 
-## Unit tests and check code style
-```sh
-make update
-make test-all
+- **Enhanced Debugging**: Customized Symfony VarDumper configuration optimized for CLI development
+- **Development Dependencies**: Unified package for all necessary JBZoo development tools
+- **Standardized Toolchain**: Consistent development environment across JBZoo ecosystem
+- **Quality Assurance**: Integrated code style checking and testing framework
+
+## Installation
+
+```bash
+composer require --dev jbzoo/toolbox-dev
+```
+
+## Key Components
+
+### VarDumper Enhancement
+Provides an optimized debugging experience with:
+- Output redirected to `php://stderr` to avoid breaking script output
+- 16KB string limit for performance
+- Classic indentation style for better readability
+- UTF-8 encoding support
+
+### Development Tools Integration
+Includes standardized versions of:
+- **jbzoo/phpunit** - Enhanced PHPUnit testing framework
+- **jbzoo/codestyle** - Comprehensive code quality tools
+- **jbzoo/markdown** - Markdown processing utilities
+- **symfony/var-dumper** - Advanced debugging capabilities
+- **php-coveralls/php-coveralls** - Coverage reporting
+- **fakerphp/faker** - Test data generation
+
+## Usage
+
+### Development Setup
+```bash
+make update    # Install/update all dependencies
+```
+
+### Testing and Quality Assurance
+```bash
+make test      # Run PHPUnit tests
+make test-all  # Run tests and code style checks
+make codestyle # Run all code quality tools
 ```
 
+### Debugging
+The VarDumper configuration is automatically loaded, enhancing the `dump()` function:
+
+```php
+// Enhanced debugging output
+dump($variable);  // Outputs to stderr with optimized formatting
+```
+
+## Requirements
+
+- PHP 8.2 or higher
+- Composer for dependency management
+
+## Integration
+
+This package is designed to be included as a development dependency in JBZoo projects:
+
+```json
+{
+    "require-dev": {
+        "jbzoo/toolbox-dev": "^7.0"
+    }
+}
+```
 
-### License
+## License
 
 MIT