## Testing Infrastructure

40. **Create test utilities** (`internal/testutil/`)
    - `CreateTestRepo() (*Repository, cleanup func())`
    - `CreateTestCommit(repo, message string) string`
    - `AssertFileContents(t, path, expected string)`
    - Mock filesystem for daemon tests

41. **Write unit tests for each component**
    - Core: repository_test.go, transaction_test.go
    - Storage: oplog_test.go, workstreams_test.go
    - Git: objects_test.go, rebase_test.go
    - Commands: One test file per command
    - Minimum 80% code coverage

42. **Create integration tests** (`test/integration/`)
    - Full workflow test (init → new → save → sync → push)
    - Conflict resolution scenarios
    - Undo/redo sequences
    - Daemon snapshot creation
    - Workstream switching with changes

43. **Add benchmark tests** (`test/benchmarks/`)
    - Oplog append performance
    - Snapshot creation speed
    - Large repository handling
    - Rebase performance with many commits

## Error Handling & Logging

44. **Implement structured logging** (`internal/utils/logger.go`)
    - Use structured logging library (zap or logrus)
    - Log levels: Debug, Info, Warn, Error
    - Log to .onx/logs/onx.log
    - Rotate logs daily

45. **Create error types** (`internal/errors/errors.go`)
    ```go
    type OnyxError struct {
        Code    string
        Message string
        Cause   error
        Hint    string
    }
    ```

46. **Add recovery mechanisms**
    - Panic recovery in daemon
    - Graceful degradation on partial failures
    - Clear error messages with recovery hints

## Documentation

47. **Write user documentation** (`docs/user-guide.md`)
    - Getting started guide
    - Command reference with examples
    - Workflow tutorials
    - Migration guide from Git

48. **Create developer documentation** (`docs/developer-guide.md`)
    - Architecture overview
    - API documentation
    - Contributing guidelines
    - Testing procedures

49. **Add inline code documentation**
    - Package-level documentation
    - Public API documentation
    - Complex algorithm explanations
    - Generate with `godoc`

## Build & Deployment

50. **Create build scripts** (`scripts/build.sh`)
    ```bash
    #!/bin/bash
    # Build for multiple platforms
    GOOS=darwin GOARCH=amd64 go build -o bin/onx-darwin-amd64
    GOOS=linux GOARCH=amd64 go build -o bin/onx-linux-amd64
    GOOS=windows GOARCH=amd64 go build -o bin/onx-windows-amd64.exe
    ```

51. **Set up CI/CD** (`.github/workflows/ci.yml`)
    - Run tests on push
    - Check code formatting
    - Run linters
    - Build binaries
    - Upload artifacts

52. **Create installation scripts**
    - Homebrew formula for macOS
    - .deb package for Ubuntu/Debian
    - .rpm package for Fedora/RHEL
    - Windows installer (.msi)

53. **Implement version management**
    - Embed version in binary
    - `onx version` command
    - Semantic versioning
    - Git tag for releases

## Performance Optimization

54. **Profile critical paths**
    - Use pprof for CPU profiling
    - Identify bottlenecks in snapshot creation
    - Optimize oplog serialization
    - Cache frequently accessed data

55. **Implement caching layers**
    - Cache Git objects in memory
    - Cache workstream metadata
    - Implement LRU eviction
    - Monitor cache hit rates

## Final Integration & Polish

56. **Implement help system**
    - Rich help text for all commands
    - Examples for common workflows
    - Interactive prompts for missing arguments
    - Suggest next commands

57. **Add shell completions**
    - Bash completion script
    - Zsh completion script  
    - Fish completion script
    - PowerShell completion

58. **Create demo repository**
    - Sample project with history
    - Multiple workstreams
    - Demonstrate all features
    - Include in documentation

59. **Perform security audit**
    - Review file permissions
    - Validate input sanitization
    - Check for race conditions
    - Audit dependency vulnerabilities

60. **Final testing and bug fixes**
    - User acceptance testing
    - Performance testing with large repos
    - Cross-platform compatibility testing
    - Fix all critical and high-priority bugs

## Deployment Checklist

✅ All unit tests passing  
✅ Integration tests passing  
✅ Documentation complete  
✅ Binaries built for all platforms  
✅ Installation scripts tested  
✅ Demo repository prepared  
✅ Security audit complete  
✅ Performance benchmarks acceptable  
✅ Version tagged in Git  
✅ Release notes written  

## Success Metrics

- **Functionality**: All Phase 1 commands working as specified
- **Performance**: Snapshot creation < 100ms for typical repos
- **Reliability**: Zero data loss, robust undo/redo
- **Compatibility**: Works with all Git 2.x clients
- **Quality**: >80% test coverage, <5 bugs per KLOC

This implementation plan provides a complete, unambiguous roadmap for building Onyx Phase 1. Each step builds upon the previous ones, ensuring a logical progression from foundation to finished product.