phg/hosts-go
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hosts-go/memory-bank/progress.md
phg d66ec51ebd feat: Initialize hosts-go project with foundational structure and core functionality 
- Created activeContext.md and productContext.md to outline project goals and current focus.
- Established progress.md to track project milestones and tasks.
- Developed projectbrief.md detailing application overview, requirements, and directory structure.
- Documented systemPatterns.md to describe architecture and design patterns used.
- Compiled techContext.md to specify technologies and development setup.
- Implemented comprehensive unit tests in models_test.go for HostEntry and HostsFile functionalities.
2025-08-12 22:41:33 +02:00

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Progress: hosts-go

What Works

✅ Memory Bank Foundation

  • Project documentation: Complete memory bank structure established
  • Architecture planning: Clear technical design documented
  • Development approach: TDD strategy and patterns defined
  • Technology stack: Bubble Tea ecosystem selected and documented

✅ Project Definition

  • Core requirements: Two-pane TUI for hosts file management clearly defined
  • User experience: Safety-first approach with explicit edit mode
  • Technical constraints: Permission model and file safety requirements established
  • Directory structure: Planned layout for Go project organization

✅ Foundation Implementation (COMPLETED)

  • Go module initialization: ✅ go.mod created with all core dependencies
  • Directory structure: ✅ Complete project structure (cmd/, internal/, tests/)
  • Core data models: ✅ internal/core/models.go with HostEntry and HostsFile structs
  • Validation system: ✅ IP address and hostname validation with RFC compliance
  • Test suite: ✅ Comprehensive tests (44 test cases, 100% passing)
  • Demo application: ✅ Working cmd/hosts/main.go demonstrating functionality

What's Left to Build

🚧 Core Functionality (Phase 1 - Current Priority)

  • Hosts file parser: Read and parse /etc/hosts file format
    • Parse IP addresses, hostnames, comments
    • Handle disabled entries (commented out)
    • Preserve original formatting and comments
  • File operations: Read hosts file with error handling
  • Round-trip parsing: Parse → modify → write back with format preservation

🎨 Basic TUI (Phase 2)

  • Main Bubble Tea model: Core application state and structure
  • Two-pane layout: Left list + right detail view
  • Entry list display: Show active status, IP, hostname columns
  • Entry selection: Navigate and select entries with keyboard
  • View mode: Safe browsing without modification capability

🔧 Edit Functionality (Phase 3)

  • Edit mode transition: Explicit mode switching with visual indicators
  • Permission handling: Request sudo access when entering edit mode
  • Entry modification: Add, edit, delete, toggle active status
  • File writing: Atomic updates with backup and rollback
  • Input validation: Real-time validation of IP and hostname inputs

🌐 Advanced Features (Phase 4)

  • DNS resolution: Background hostname to IP resolution
  • IP comparison: Compare resolved vs current IP addresses
  • Entry reordering: Manual drag/drop or move commands
  • Sorting options: Sort by IP, hostname, or custom order
  • Search/filter: Find entries quickly in large files

🧪 Testing & Quality (Ongoing)

  • Parser tests: Round-trip parsing, edge cases, malformed files
  • Model tests: Data validation, entry manipulation
  • TUI tests: User interactions, state transitions
  • Integration tests: Complete workflows, file operations
  • Permission tests: sudo scenarios, graceful degradation

Current Status

Project Phase: Foundation Complete → Core Functionality

  • Completion: ~25% (foundation and core models complete)
  • Active work: Ready to implement hosts file parser (Phase 1)
  • Blockers: None - solid foundation established

Development Readiness

  • ✅ Architecture designed: Clear technical approach documented
  • ✅ Requirements defined: User experience and functionality specified
  • ✅ Technology selected: Bubble Tea stack confirmed and installed
  • ✅ Testing strategy: TDD approach implemented and proven
  • ✅ Project scaffolding: Complete Go module with all dependencies
  • ✅ Development environment: Fully functional with comprehensive tests

Risk Assessment

  • Low risk: Well-established technology stack (Go + Bubble Tea)
  • Medium risk: Permission handling complexity (sudo integration)
  • Low risk: File format parsing (well-defined /etc/hosts format)
  • Medium risk: TUI responsiveness with large files

Known Issues

Technical Challenges

  • Permission elevation: Need to handle sudo gracefully across platforms
  • File locking: Prevent concurrent modifications to /etc/hosts
  • Large file performance: Ensure responsiveness with large hosts files
  • Terminal compatibility: Test across different terminal applications

Implementation Decisions Needed

  • Configuration storage: Where to store user preferences and settings
  • Backup strategy: How many backups to keep and where to store them
  • DNS timeout handling: How to handle slow or unresponsive DNS queries
  • Error recovery: How to handle corrupted hosts files or write failures

Evolution of Project Decisions

Initial Scope

  • Started with comprehensive feature set including DNS resolution
  • Planned for cross-platform compatibility from day one
  • Emphasized safety and validation throughout

Refined Approach

  • TDD emphasis: Write tests first to ensure reliability
  • Incremental development: Build core functionality before advanced features
  • Safety first: Default to read-only mode, explicit edit mode transition
  • User experience focus: Two-pane interface for efficiency

Technology Evolution

  • Framework choice: Bubble Tea selected for maturity and documentation
  • Architecture pattern: MVU pattern from Bubble Tea ecosystem
  • Testing approach: Comprehensive coverage with mocked dependencies
  • Development workflow: Standard Go tooling with additional quality tools

Success Metrics & Milestones

Milestone 1: Basic Functionality (Target: Week 1)

  • Parse and display existing hosts file entries
  • Navigate entries with keyboard
  • View entry details in right pane
  • Success criteria: Can safely browse hosts file without editing

Milestone 2: Core Editing (Target: Week 2)

  • Toggle entries active/inactive
  • Add new entries with validation
  • Edit existing entries
  • Success criteria: Can perform basic hosts file modifications safely

Milestone 3: Advanced Features (Target: Week 3)

  • DNS resolution and IP updates
  • Entry reordering and sorting
  • Search and filtering
  • Success criteria: Full feature parity with manual editing plus enhancements

Milestone 4: Polish & Release (Target: Week 4)

  • Comprehensive testing and bug fixes
  • Documentation and usage examples
  • Cross-platform testing and compatibility
  • Success criteria: Production-ready tool suitable for daily use

Next Immediate Actions

✅ COMPLETED Foundation Tasks

  1. ✅ Initialize Go project (go mod init hosts-go)
  2. ✅ Add core dependencies (Bubble Tea, Bubbles, Lip Gloss, testify)
  3. ✅ Create directory structure according to projectbrief.md
  4. ✅ Create core data models with comprehensive validation
  5. ✅ Implement test suite (44 tests, 100% passing)
  6. ✅ Create demo application proving foundation works

🚧 NEXT Phase 1 Actions (Hosts File Parser)

  1. Write parser tests for /etc/hosts file format parsing
  2. Implement hosts file reader (internal/core/parser.go)
  3. Add line-by-line parsing logic with comment preservation
  4. Test round-trip parsing (read → parse → write)
  5. Handle edge cases (malformed entries, various formats)

The foundation is now solid and ready for implementing the core parsing functionality.