Project Milestones

This document outlines the updated project milestones for the ReX project, with a focus on test-driven development and implementation of the Compositional Content Architecture (ADR-007) and Historical-Collaborative Content Architecture (ADR-008).

Completed Milestones

Milestone 1: Initial Architecture Establishment

• ✅ Core architecture patterns defined and documented
• ✅ Basic MDX processing engine implemented
• ✅ Initial content type system designed
• ✅ Environment configuration system established
• ✅ Vite-based build system configured

Milestone 2: Architecture Transition Foundation

• ✅ Architectural evaluation and decision records created
• ✅ Compositional Content Architecture designed (ADR-007)
• ✅ Historical-Collaborative Architecture outlined (ADR-008)
• ✅ Core interfaces for new architecture defined
• ✅ Error handling system with enhanced context
• ✅ Documentation structure reorganized and standardized
• ✅ Business documentation recovered and integrated

Current Milestones

Milestone 3: Test-Driven Implementation Foundation

Progress: 10%

• 🔄 Test infrastructure setup with Vitest
• 🔄 Contract testing framework for interfaces
• 🔄 Documentation testing for code examples
• 🔄 Core content interfaces with generic support
• ⏳ Function composition utilities
• ⏳ Type verification tests
• ⏳ Environment detection implementation
• ⏳ Basic content operations

Success Criteria:

• Test coverage above 90% for all implemented components
• All interfaces have corresponding contract tests
• Documentation examples are verified through tests
• Type system is fully documented and tested

Milestone 4: Storage Layer Implementation

Progress: 0%

• ⏳ Base adapter interface implementation
• ⏳ Adapter capability detection
• ⏳ Memory adapter implementation
• ⏳ Node.js FileSystem adapter implementation
• ⏳ Browser storage adapter (IndexedDB)
• ⏳ HTTP content adapter
• ⏳ Adapter testing framework
• ⏳ Environment-specific storage optimizations

Success Criteria:

• All storage adapters pass common test suite
• Cross-environment testing validates compatibility
• Adapter factory functions properly detect environment
• Performance benchmarks meet targets for each adapter

Milestone 5: Middleware & Store Implementation

Progress: 0%

• ⏳ Middleware composition pattern
• ⏳ Core middleware implementations (validation, caching, logging)
• ⏳ Content store factory functions
• ⏳ Store operations implementation
• ⏳ Event observation system
• ⏳ Content registry for multi-adapter support
• ⏳ Enhanced error handling through middleware
• ⏳ Performance optimization and benchmarking

Success Criteria:

• Middleware can be composed in any order
• Store operations correctly leverage middleware chain
• Event system properly notifies observers of changes
• Error handling provides rich context and recovery options

Milestone 6: React Integration & Developer Tools

Progress: 0%

• ⏳ React hooks for content operations
• ⏳ ContentProvider context implementation
• ⏳ MDX component integration
• ⏳ React error boundaries for content errors
• ⏳ Developer tools extension
• ⏳ Performance monitoring utilities
• ⏳ Content debugging tools
• ⏳ Documentation and examples for React integration

Success Criteria:

• React components properly handle content lifecycle
• Hooks follow React best practices for cleanup
• Developer tools provide useful debugging information
• Integration examples demonstrate real-world usage patterns

Planned Milestones

Milestone 7: Historical Content System

• ⏳ Operation-based history tracking
• ⏳ Content versioning system
• ⏳ Temporal querying of historical content
• ⏳ History visualization components
• ⏳ Metadata for historical operations
• ⏳ Version management tools
• ⏳ History storage adapters
• ⏳ Performance optimization for history operations

Success Criteria:

• Content history is tracked efficiently with minimal overhead
• Temporal queries retrieve correct historical state
• Versions can be created, compared, and restored
• Performance meets targets even with large history

Milestone 8: Collaborative Editing Framework

• ⏳ Vector clock implementation
• ⏳ Conflict detection system
• ⏳ Operation transformation engine
• ⏳ Merge resolution strategies
• ⏳ Presence awareness system
• ⏳ Collaborative session management
• ⏳ Multi-user authorization
• ⏳ Real-time synchronization

Success Criteria:

• Collaborative editing works smoothly with multiple users
• Conflicts are properly detected and resolved
• Users are aware of each other’s presence and actions
• System remains performant under collaborative load

Milestone 9: Content Authoring Platform

• ⏳ Visual MDX editor implementation
• ⏳ Component library integration
• ⏳ Media management system
• ⏳ Content workflow tools
• ⏳ Publishing and distribution system
• ⏳ Content validation and verification
• ⏳ Import/export capabilities
• ⏳ User management and permissions

Success Criteria:

• Content can be created and edited visually
• Components can be inserted and configured
• Workflows support review and approval processes
• System scales to enterprise content needs

Milestone 10: Enterprise Features & Production Release

• ⏳ Enterprise authentication integration
• ⏳ Advanced permission models
• ⏳ Audit logging and compliance
• ⏳ Performance at scale
• ⏳ High availability configuration
• ⏳ Disaster recovery systems
• ⏳ Enterprise documentation
• ⏳ Official v1.0 release

Success Criteria:

• System meets enterprise security requirements
• Performance scales to large content repositories
• Uptime and reliability meet enterprise standards
• Documentation covers all aspects of implementation and operation

Implementation Approach

Test-Driven Development Workflow

1. Interface Definition Phase

   • Define interface and type contracts
   • Document expected behaviors
   • Create test cases for interface compliance
   • Set up test fixtures and mocks

2. Contract Testing Phase

   • Implement tests that verify interface contracts
   • Create property-based tests for behavior validation
   • Develop input/output validation tests
   • Build error case tests

3. Implementation Phase

   • Develop implementation code to pass tests
   • Refactor for optimization while maintaining tests
   • Document implementation details and decisions
   • Ensure test coverage meets standards

4. Integration Phase

   • Test interactions with other components
   • Verify environment-specific behavior
   • Benchmark performance characteristics
   • Update documentation with real-world examples

Component Implementation Order

To manage dependencies and ensure testability, components will be implemented in this order:

1. Foundation Layer

   • Type definitions
   • Function composition utilities
   • Environment detection
   • Error handling system

2. Storage Layer

   • Memory adapter (for testing)
   • Base adapter interface
   • Environment-specific adapters

3. Enhancement Layer

   • Middleware pattern
   • Core middleware implementations
   • Composition utilities

4. Store Layer

   • Content store operations
   • Event notification system
   • Registry and facade

5. Integration Layer

   • React hooks and components
   • Developer tools
   • Documentation examples

6. Advanced Features

   • Historical tracking
   • Collaboration
   • Visual editing

Success Metrics

Each milestone will be evaluated against these metrics:

1. Test Coverage: Minimum 90% test coverage for all code
2. Type Safety: Complete type definitions for all interfaces
3. Documentation: Comprehensive documentation with tested examples
4. Performance: Meeting defined performance benchmarks
5. Cross-Environment: Functionality across Node.js and browsers
6. Code Quality: Meeting linting and static analysis standards

Risk Management

Each milestone identifies these key risks and mitigation strategies:

1. Technical Complexity

   • Risk: Complex features like collaboration are challenging to implement correctly
   • Mitigation: Incremental development with thorough testing at each step

2. Cross-Environment Compatibility

   • Risk: Different behavior across Node.js, browsers, and edge environments
   • Mitigation: Comprehensive environment-specific testing

3. Performance at Scale

   • Risk: Performance degradation with large content repositories
   • Mitigation: Performance testing throughout development, not just at the end

4. API Consistency

   • Risk: Drift between documentation and implementation
   • Mitigation: Documentation tests and contract verification

Implementation Tracking

Progress on milestones will be tracked using:

• Feature Status Tags: ✅ Complete, 🔄 In Progress, ⏳ Planned, 🚫 Blocked
• Percentage Completion: Estimated completion percentage for each milestone
• Test Coverage: Actual test coverage for implemented features
• Documentation Status: Completeness of documentation for each feature

Milestone Review Process

At the completion of each milestone:

1. Technical Review

   • Verify all success criteria are met
   • Review test coverage and quality
   • Assess code quality and maintainability
   • Validate documentation completeness

2. Demo and Feedback

   • Demonstrate completed features
   • Gather feedback on usability and functionality
   • Identify potential improvements for future milestones
   • Document lessons learned

3. Planning Adjustment

   • Update future milestones based on learnings
   • Refine estimates and resource allocation
   • Adjust priorities if needed
   • Document changes to the milestone plan

Legend

• ✅ Complete: Milestone component is fully implemented and tested
• 🔄 In Progress: Milestone component is currently being worked on
• ⏳ Planned: Milestone component is planned but not yet started
• 🚫 Blocked: Milestone component is blocked by dependencies