# apt-ostree Daemon Plan - Navigation Guide

## 🎯 **Project Overview**

apt-ostree is a hybrid image/package system for Debian/Ubuntu that combines OSTree for atomic updates with APT for package management, aiming for 100% CLI compatibility with `rpm-ostree`.

## 📁 **Documentation Structure**

```
docs/apt-ostree-daemon-plan/
├── README.md                    # This navigation guide
├── overview.md                  # High-level system overview
├── client-daemon.md             # Client-daemon architecture
├── dbus.md                      # DBus interface definitions
├── 3rd-party-integration.md     # Third-party tool integration
├── architecture/                # Detailed architecture documents (17 files)
│   ├── overview.md              # Architecture overview
│   ├── cli-command-structure.md # CLI architecture
│   ├── ostree-handling.md       # OSTree integration
│   ├── package-overrides.md     # Package override system
│   ├── user-overlays.md         # User overlay system
│   ├── live-updates.md          # Live update system
│   ├── tree-composition.md      # Tree composition
│   ├── database-system.md       # Database operations
│   ├── boot-management.md       # Boot management
│   ├── transaction-system.md    # Transaction system
│   ├── apt-library-analysis.md  # APT integration
│   ├── cli-daemon-separation.md # CLI vs daemon
│   ├── responsibility-analysis.md # Responsibility distribution
│   ├── error-handling-analysis.md # Error handling
│   ├── monitoring-logging-analysis.md # Monitoring
│   ├── oci-integration-analysis.md # OCI integration
│   └── packaging.md             # Packaging architecture
├── implementation/               # Implementation guides
│   ├── getting-started.md       # Quick start guide
│   ├── development-workflow.md  # Development process
│   ├── testing-strategy.md      # Testing approach
│   └── deployment-guide.md      # Deployment instructions
└── reference/                    # Quick reference materials
    ├── command-reference.md     # All CLI commands
    ├── dbus-api.md              # DBus interface reference
    ├── configuration.md         # Configuration options
    └── troubleshooting.md       # Common issues & solutions
```

## 🏗️ **Architecture Documents** (Detailed Implementation)

### **Core Systems**
- **[OSTree Integration](architecture/ostree-handling.md)** - Complete OSTree handling architecture, package layering, and deployment management
- **[Package Management](architecture/apt-library-analysis.md)** - APT integration, package handling, and dependency resolution
- **[CLI Architecture](architecture/cli-command-structure.md)** - Complete CLI command structure, help system, and argument parsing

### **Advanced Features**
- **[Package Overrides](architecture/package-overrides.md)** - Package override system with Polkit security, base package replacement
- **[User Overlays](architecture/user-overlays.md)** - User overlay filesystem management, transient /usr modifications
- **[Live Updates](architecture/live-updates.md)** - Live system updates without reboot, filesystem synchronization
- **[Tree Composition](architecture/tree-composition.md)** - OSTree tree building, composition workflows, and container support

### **System Management**
- **[Database System](architecture/database-system.md)** - Package database operations, diffing, and version management
- **[Boot Management](architecture/boot-management.md)** - Initramfs management, kernel arguments, and bootloader configuration
- **[Transaction System](architecture/transaction-system.md)** - Atomic transaction management, state persistence, and rollback

### **Integration & Security**
- **[Security Model](architecture/responsibility-analysis.md)** - Security and privilege management, authorization policies
- **[OCI Integration](architecture/oci-integration-analysis.md)** - Container image support, OCI standards compliance
- **[Monitoring & Logging](architecture/monitoring-logging-analysis.md)** - System monitoring, metrics collection, and structured logging

### **System Architecture**
- **[CLI-Daemon Separation](architecture/cli-daemon-separation.md)** - Clear separation of responsibilities between CLI and daemon
- **[Error Handling](architecture/error-handling-analysis.md)** - Comprehensive error handling, recovery, and user feedback
- **[Packaging](architecture/packaging.md)** - Debian packaging, systemd integration, and deployment

## 🚀 **Implementation Guides** (How to Build)

- **[Getting Started](implementation/getting-started.md)** - Quick start guide for developers
- **[Development Workflow](implementation/development-workflow.md)** - Development process, tools, and best practices
- **[Testing Strategy](implementation/testing-strategy.md)** - Testing approaches, examples, and CI/CD integration
- **[Deployment Guide](implementation/deployment-guide.md)** - Deployment instructions and production considerations

## 📚 **Reference Materials** (Quick Lookup)

- **[Command Reference](reference/command-reference.md)** - All CLI commands with examples and flags
- **[DBus API](reference/dbus-api.md)** - Complete DBus interface reference and examples
- **[Configuration](reference/configuration.md)** - Configuration options, examples, and best practices
- **[Troubleshooting](reference/troubleshooting.md)** - Common issues, solutions, and debugging tips

## 🔗 **Quick Navigation by Feature**

### **Package Management**
- **Install/Remove**: [CLI Commands](architecture/cli-command-structure.md) → Install/Uninstall
- **Overrides**: [Package Overrides](architecture/package-overrides.md)
- **User Overlays**: [User Overlays](architecture/user-overlays.md)
- **Live Updates**: [Live Updates](architecture/live-updates.md)

### **System Operations**
- **Status & Info**: [CLI Commands](architecture/cli-command-structure.md) → Status/DB
- **Upgrade & Deploy**: [CLI Commands](architecture/cli-command-structure.md) → Upgrade/Deploy
- **Rollback**: [CLI Commands](architecture/cli-command-structure.md) → Rollback
- **Tree Composition**: [Tree Composition](architecture/tree-composition.md)

### **Boot & Kernel**
- **Initramfs**: [Boot Management](architecture/boot-management.md) → Initramfs
- **Kernel Args**: [Boot Management](architecture/boot-management.md) → Kernel Arguments
- **Boot Configuration**: [Boot Management](architecture/boot-management.md) → Bootloader

### **Security & Privileges**
- **Authorization**: [Security Model](architecture/responsibility-analysis.md)
- **Polkit Integration**: [Security Model](architecture/responsibility-analysis.md) → Polkit
- **Privilege Management**: [Security Model](architecture/responsibility-analysis.md) → Privileges

## 🗺️ **Implementation Roadmap**

### **Phase 1: Core Foundation** 🏗️
- [x] **Architecture Documentation** - Complete system architecture documented
- [ ] **Basic CLI Structure** - Command parsing and help system
- [ ] **OSTree Integration** - Basic OSTree operations and deployment
- [ ] **APT Integration** - Package management and dependency resolution

### **Phase 2: Advanced Features** 🚀
- [ ] **Package Override System** - Base package replacement
- [ ] **User Overlay Management** - Transient filesystem modifications
- [ ] **Live Update Capabilities** - Runtime system modifications
- [ ] **Transaction Management** - Atomic operations and rollback

### **Phase 3: Production Features** 🎯
- [ ] **Security Integration** - Polkit authorization and privilege management
- [ ] **Boot Management** - Initramfs and kernel argument handling
- [ ] **Tree Composition** - OSTree tree building and management
- [ ] **OCI Support** - Container image integration

### **Phase 4: Integration & Testing** 🧪
- [ ] **Comprehensive Testing** - Unit, integration, and system tests
- [ ] **Performance Optimization** - Caching, parallelization, and optimization
- [ ] **Monitoring & Logging** - System health and debugging
- [ ] **Production Deployment** - Systemd integration and packaging

## 🔍 **Finding What You Need**

### **For Developers New to apt-ostree**
1. Start with [Getting Started](implementation/getting-started.md)
2. Review [Architecture Overview](architecture/overview.md)
3. Explore [CLI Commands](architecture/cli-command-structure.md)

### **For rpm-ostree Developers**
1. Check [CLI-Daemon Separation](architecture/cli-daemon-separation.md)
2. Review [Responsibility Analysis](architecture/responsibility-analysis.md)
3. Compare with [rpm-ostree Architecture](../.notes/architecture/rpm-ostree.md)

### **For System Administrators**
1. Review [Command Reference](reference/command-reference.md)
2. Check [Configuration](reference/configuration.md)
3. Read [Troubleshooting](reference/troubleshooting.md)

### **For Package Maintainers**
1. Review [Packaging](architecture/packaging.md)
2. Check [Deployment Guide](implementation/deployment-guide.md)
3. Read [Configuration](reference/configuration.md)

## 📖 **Documentation Standards**

Each architecture document follows a consistent structure:
- **Overview** - High-level system description
- **Architecture** - Component separation and responsibilities
- **Implementation** - Detailed code examples and workflows
- **Security** - Security considerations and Polkit integration
- **Performance** - Optimization strategies and caching
- **Testing** - Testing approaches and examples
- **Future** - Enhancement roadmap and considerations

## 🤝 **Contributing**

When adding new features or updating existing ones:
1. **Update the relevant architecture document** with detailed implementation
2. **Add cross-references** to related systems
3. **Update this navigation guide** if adding new major systems
4. **Follow the documentation standards** for consistency

## 📞 **Getting Help**

- **Architecture Questions**: Check the relevant architecture document
- **Implementation Issues**: Review the implementation guides
- **Quick Reference**: Use the reference materials
- **Development**: Follow the development workflow guide

---

*This navigation guide provides a comprehensive overview of the apt-ostree daemon plan architecture. Each document contains detailed implementation information while maintaining clear organization and discoverability.*

## 🔄 **Documentation Maintenance**

### **Adding New Systems**
When adding new major systems:
1. Create detailed architecture document in `architecture/` directory
2. Add cross-references to related systems
3. Update this README with new system description
4. Add implementation roadmap for the new system

### **Updating Existing Systems**
When updating existing systems:
1. Update the relevant architecture document
2. Ensure cross-references remain accurate
3. Update implementation roadmap if needed
4. Verify navigation links still work

### **Cross-Reference Management**
Each architecture document should include:
- **Related Documents** section with links to related systems
- **Implementation Roadmap** with phased development plan
- **Cross-references** to related functionality in other documents
