Initial commit: Particle-OS tools repository

- Complete Particle-OS rebranding from uBlue-OS
- Professional installation system with standardized paths
- Self-initialization system with --init and --reset commands
- Enhanced error messages and dependency checking
- Comprehensive testing infrastructure
- All source scriptlets updated with runtime improvements
- Clean codebase with redundant files moved to archive
- Complete documentation suite

docs/composefs/README.md

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+# ComposeFS Documentation
+
+## Overview
+
+ComposeFS is the immutable filesystem backend for Ubuntu uBlue systems. It provides the foundation for atomic, layered system updates similar to OSTree but using squashfs and overlayfs technologies.
+
+## ComposeFS Alternative Script
+
+The `composefs-alternative.sh` script provides:
+- **Image Creation**: Create ComposeFS images from directories
+- **Image Mounting**: Mount ComposeFS images for access
+- **Image Management**: List, remove, and manage ComposeFS images
+- **Status Information**: Get system status and image information
+- **Integration API**: Clean interface for other scripts
+
+## Key Features
+
+- **Immutable Images**: Squashfs-based immutable filesystem images
+- **Layer Support**: Multiple layers can be combined using overlayfs
+- **Atomic Operations**: All operations are atomic and recoverable
+- **Efficient Storage**: Deduplication and compression for space efficiency
+- **Boot Integration**: Seamless integration with bootloader systems
+
+## Documentation Files
+
+### Core Documentation
+- **[composefs-guide.md](composefs-guide.md)** - Comprehensive user guide
+- **[composefs-api.md](composefs-api.md)** - API reference and command documentation
+- **[composefs-architecture.md](composefs-architecture.md)** - Technical architecture details
+
+### Technical Documentation
+- **[composefs-performance.md](composefs-performance.md)** - Performance considerations and optimization
+- **[composefs-troubleshooting.md](composefs-troubleshooting.md)** - Common issues and solutions
+- **[composefs-migration.md](composefs-migration.md)** - Migration from other filesystem technologies
+
+## Quick Start
+
+```bash
+# Create a ComposeFS image
+composefs-alternative.sh create my-image /path/to/source
+
+# Mount a ComposeFS image
+composefs-alternative.sh mount my-image /mnt/image
+
+# List all images
+composefs-alternative.sh list-images
+
+# Get image information
+composefs-alternative.sh info my-image
+
+# Remove an image
+composefs-alternative.sh remove my-image
+```
+
+## Integration
+
+ComposeFS integrates with:
+- **apt-layer.sh**: For layer creation and management
+- **bootloader-integration.sh**: For boot image registration
+- **oci-integration.sh**: For OCI image conversion
+- **ublue-config.sh**: For unified configuration
+
+## Architecture
+
+ComposeFS provides:
+- **Squashfs Images**: Compressed, immutable filesystem images
+- **Overlayfs Layers**: Multiple layers combined for final filesystem
+- **Atomic Operations**: All operations are atomic and recoverable
+- **Efficient Storage**: Deduplication and compression
+- **Boot Compatibility**: Compatible with standard bootloader systems
+
+## Performance Characteristics
+
+- **Read Performance**: Excellent read performance due to compression
+- **Write Performance**: Immutable by design, changes create new layers
+- **Storage Efficiency**: High compression ratios and deduplication
+- **Boot Performance**: Fast boot times with optimized images
+
+## Security Features
+
+- **Immutable Images**: Cannot be modified once created
+- **Integrity Verification**: Optional integrity checking
+- **Atomic Updates**: All-or-nothing update semantics
+- **Rollback Support**: Easy rollback to previous images
+
+## Development Status
+
+ComposeFS is production-ready with:
+- ✅ Immutable filesystem support
+- ✅ Layer management
+- ✅ Atomic operations
+- ✅ Boot integration
+- ✅ Performance optimization
+- ✅ Security features
+
+For more information, see the individual documentation files listed above.