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+# Progress: hosts
+
+## What Works
+
+### Project Foundation
+- ✅ **uv project initialized**: Basic Python 3.13 project with uv configuration
+- ✅ **Code quality setup**: ruff configured for linting and formatting
+- ✅ **Memory bank complete**: All core documentation files created and populated
+- ✅ **Architecture defined**: Clear layered architecture and design patterns established
+
+### Documentation
+- ✅ **Project brief**: Comprehensive project definition and requirements
+- ✅ **Product context**: User experience goals and problem definition
+- ✅ **Technical context**: Technology stack and development setup
+- ✅ **System patterns**: Architecture, design patterns, and implementation paths
+- ✅ **Active context**: Current work focus and next steps
+
+## What's Left to Build
+
+### Phase 1: Foundation (Immediate)
+- ❌ **Project structure**: Create proper `src/hosts/` package structure
+- ❌ **Dependencies**: Add textual, pytest, and other required packages
+- ❌ **Entry point**: Configure proper application entry point in pyproject.toml
+- ❌ **Core models**: Implement HostEntry and HostsFile data classes
+- ❌ **Hosts parser**: Create parser for reading/writing `/etc/hosts` files
+
+### Phase 2: Core Functionality
+- ❌ **Basic TUI**: Implement main application with two-pane layout
+- ❌ **File loading**: Read and parse existing hosts file
+- ❌ **Entry display**: Show hosts entries in left pane
+- ❌ **Detail view**: Show selected entry details in right pane
+- ❌ **Navigation**: Keyboard navigation between entries
+
+### Phase 3: Read-Only Features
+- ❌ **Entry selection**: Highlight and select entries
+- ❌ **Sorting**: Sort entries by IP, hostname, or comments
+- ❌ **Filtering**: Filter entries by active/inactive status
+- ❌ **Search**: Find entries by hostname or IP
+
+### Phase 4: Edit Mode
+- ❌ **Permission management**: Sudo request and management
+- ❌ **Edit mode toggle**: Switch between read-only and edit modes
+- ❌ **Entry activation**: Toggle entries active/inactive
+- ❌ **Entry reordering**: Move entries up/down in the list
+- ❌ **Entry editing**: Modify IP addresses, hostnames, comments
+
+### Phase 5: Advanced Features
+- ❌ **DNS resolution**: Resolve hostnames to IP addresses
+- ❌ **IP comparison**: Compare stored vs resolved IPs
+- ❌ **CNAME support**: Store DNS names alongside IP addresses
+- ❌ **Undo/Redo**: Command pattern implementation
+- ❌ **File validation**: Comprehensive validation before saving
+
+### Phase 6: Polish
+- ❌ **Error handling**: Graceful error handling and user feedback
+- ❌ **Help system**: In-app help and keyboard shortcuts
+- ❌ **Configuration**: User preferences and settings
+- ❌ **Performance**: Optimization for large hosts files
+
+## Current Status
+
+### Development Stage
+**Stage**: Project Initialization
+**Progress**: 10% (Foundation documentation complete)
+**Next Milestone**: Basic project structure and dependencies
+
+### Immediate Blockers
+1. **Project structure**: Need to create proper package layout
+2. **Dependencies**: Must add textual framework to begin TUI development
+3. **Entry point**: Configure uv to run the application properly
+
+### Recent Accomplishments
+- Completed comprehensive project planning and documentation
+- Established clear architecture and design patterns
+- Created memory bank system for project continuity
+- Defined development phases and priorities
+
+## Known Issues
+
+### Current Limitations
+- **Placeholder implementation**: main.py only prints hello message
+- **Missing dependencies**: Core frameworks not yet added
+- **No package structure**: Files not organized in proper Python package
+- **No tests**: Testing framework not yet configured
+
+### Technical Debt
+- **Temporary main.py**: Needs to be moved to proper location
+- **Missing type hints**: Will need comprehensive typing
+- **No error handling**: Basic error handling patterns needed
+- **No logging**: Logging system not yet implemented
+
+## Evolution of Project Decisions
+
+### Initial Decisions (Current)
+- **Python 3.13**: Chosen for modern features and performance
+- **Textual**: Selected for rich TUI capabilities
+- **uv**: Adopted for fast package management
+- **ruff**: Chosen for code quality and speed
+
+### Architecture Evolution
+- **Layered approach**: Decided on clear separation of concerns
+- **Command pattern**: Chosen for undo/redo functionality
+- **Immutable state**: Selected for predictable state management
+- **Permission model**: Explicit edit mode for safety
+
+### Design Considerations
+- **Safety first**: Read-only default mode prioritized
+- **User experience**: Keyboard-driven interface emphasized
+- **File integrity**: Atomic operations and validation required
+- **Performance**: Responsive UI for large files planned
+
+## Success Metrics Progress
+
+### Completed Metrics
+- ✅ **Project documentation**: Comprehensive planning complete
+- ✅ **Architecture clarity**: Clear technical direction established
+- ✅ **Development setup**: Basic environment ready
+
+### Pending Metrics
+- ❌ **Functional prototype**: Basic TUI not yet implemented
+- ❌ **File parsing**: Hosts file reading not yet working
+- ❌ **User testing**: No user interface to test yet
+- ❌ **Performance benchmarks**: No code to benchmark yet
+
+## Next Session Priorities
+
+1. **Create project structure**: Set up src/hosts/ package layout
+2. **Add dependencies**: Install textual and pytest
+3. **Implement data models**: Create HostEntry and HostsFile classes
+4. **Basic parser**: Read and parse simple hosts file format
+5. **Minimal TUI**: Create basic application shell
+
+The project is well-planned and ready for implementation to begin.