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+## 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.