Add comprehensive documentation for Bitpoll Nix Flake, including memory bank, project brief, product context, active context, progress, system patterns, tech context, and usage guidelines.
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memory-bank/activeContext.md
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# Active Context: Bitpoll Nix Flake
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## Current Work Focus
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### Project Status: **COMPLETE AND FUNCTIONAL**
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The Bitpoll Nix flake is fully implemented and working. All core requirements have been met:
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- ✅ **Package builds successfully** - Nix derivation creates working Bitpoll package
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- ✅ **Dependencies resolved** - All Python dependencies properly managed
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- ✅ **NixOS service functional** - Complete systemd service with security hardening
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- ✅ **Management commands work** - Django admin commands accessible
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- ✅ **Data persistence implemented** - All data stored in `/var/lib/bitpoll`
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- ✅ **Security hardening complete** - Comprehensive systemd restrictions
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- ✅ **Documentation comprehensive** - README and example configuration provided
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### Current State
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The project is in a **maintenance and enhancement** phase. The core functionality is stable and ready for production use.
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## Recent Changes
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### Fixed Issues (Completed)
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1. **Django Import Errors**: Resolved missing Django modules through proper Python environment setup
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2. **Dependency Management**: Fixed missing packages by combining nixpkgs and pip installation
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3. **Python Path Issues**: Corrected PYTHONPATH configuration in wrapper scripts
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4. **Encryption Key Support**: Added proper Fernet key generation capabilities
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5. **Service Integration**: Complete systemd service with automatic migrations and static file collection
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### Implementation Highlights
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- **Hybrid Dependency Strategy**: Core packages from nixpkgs, missing packages via pip
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- **Build-time Configuration**: Generated `settings_local.py` with secure defaults
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- **Security-first Design**: Comprehensive systemd hardening and user isolation
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- **Production Ready**: Automatic database migrations and static file management
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## Next Steps
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### Immediate Priorities
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1. **Monitor Usage**: Track adoption and gather user feedback
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2. **Update Dependencies**: Keep Bitpoll and nixpkgs versions current
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3. **Documentation Updates**: Enhance examples and troubleshooting guides
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4. **Testing Improvements**: Add automated testing for different configurations
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### Enhancement Opportunities
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1. **PostgreSQL Integration**: Improve PostgreSQL configuration options
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2. **Backup Solutions**: Add built-in backup and restore capabilities
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3. **Monitoring Integration**: Add Prometheus metrics and health checks
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4. **Multi-instance Support**: Support for multiple Bitpoll instances
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5. **Container Support**: Docker/Podman integration for non-NixOS systems
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### Long-term Goals
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1. **Upstream Integration**: Contribute package to nixpkgs
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2. **Community Building**: Establish user community and contribution guidelines
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3. **Enterprise Features**: Advanced authentication and authorization options
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4. **Performance Optimization**: Caching and performance improvements
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## Active Decisions and Considerations
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### Technical Decisions Made
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1. **Python Environment Strategy**: Use `python3.withPackages` + pip for comprehensive coverage
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2. **Configuration Approach**: Build-time generation with runtime overrides
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3. **Security Model**: Dedicated user with comprehensive systemd hardening
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4. **Data Organization**: Single directory structure for easy backup/restore
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### Ongoing Considerations
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1. **Dependency Updates**: Balance stability vs. latest features
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2. **Configuration Complexity**: Keep simple while allowing customization
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3. **Performance vs. Security**: Optimize within security constraints
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4. **Maintenance Burden**: Minimize ongoing maintenance requirements
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## Important Patterns and Preferences
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### Code Organization Patterns
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- **Flake Structure**: Single flake.nix with embedded configurations
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- **Module Design**: Self-contained NixOS module with comprehensive options
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- **Documentation**: Inline documentation with external examples
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- **Testing**: Manual testing with clear verification steps
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### Configuration Patterns
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- **Layered Configuration**: Build-time → Deploy-time → Runtime
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- **Secure Defaults**: Production-ready defaults with development overrides
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- **Environment Variables**: Support for external secret management
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- **Validation**: Clear error messages for misconfigurations
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### Security Patterns
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- **Principle of Least Privilege**: Minimal permissions and access
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- **Defense in Depth**: Multiple security layers
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- **Secure by Default**: No insecure default configurations
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- **Audit Trail**: Comprehensive logging and monitoring capabilities
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## Learnings and Project Insights
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### Key Insights
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1. **Nix Packaging Complexity**: Django applications require careful dependency management
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2. **Security Importance**: Users expect production-ready security out of the box
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3. **Documentation Critical**: Clear examples are essential for adoption
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4. **Testing Necessity**: Manual testing catches real-world deployment issues
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### Technical Learnings
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1. **Python Path Management**: Critical for Django applications in Nix
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2. **systemd Integration**: Proper service configuration requires comprehensive hardening
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3. **Build vs Runtime**: Clear separation of build-time and runtime concerns
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4. **Configuration Generation**: Build-time generation simplifies deployment
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### Process Learnings
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1. **Iterative Development**: Start simple, add complexity gradually
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2. **User Feedback**: Real-world usage reveals important requirements
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3. **Documentation First**: Good documentation drives better design
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4. **Security Review**: Security considerations should be built-in, not added later
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## Current Challenges
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### Technical Challenges
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1. **Dependency Tracking**: Keeping up with upstream Bitpoll changes
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2. **Python Ecosystem**: Managing complex Python dependency trees
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3. **Configuration Complexity**: Balancing simplicity with flexibility
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4. **Performance Optimization**: Optimizing within Nix constraints
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### Operational Challenges
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1. **User Support**: Providing support for diverse deployment scenarios
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2. **Testing Coverage**: Ensuring compatibility across different NixOS versions
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3. **Documentation Maintenance**: Keeping documentation current and accurate
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4. **Community Building**: Growing user and contributor community
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## Project Context
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### Development Environment
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- **Primary Platform**: macOS development, Linux deployment
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- **Nix Version**: Flakes-enabled Nix with NixOS 25.05
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- **Testing**: Manual testing on NixOS systems
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- **Repository**: Git repository with flake.lock for reproducibility
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### Collaboration Patterns
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- **Solo Development**: Currently single maintainer
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- **Issue Tracking**: Git repository issues for bug reports and features
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- **Documentation**: Comprehensive README with examples
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- **Community**: Open source with GPL-3.0 license
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### Quality Standards
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- **Code Quality**: Clean, well-documented Nix expressions
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- **Security Standards**: Comprehensive security hardening
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- **Documentation Standards**: Clear, comprehensive, example-driven
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- **Testing Standards**: Manual verification with real deployments
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