TDD Implementation Tasks

This document outlines the immediate tasks for implementing the ReX content system using a test-driven development approach, with a focus on maintaining API consistency and preventing documentation drift.

Documentation Structure and Completion Status

docs/
├── ✅ index.md                              # Main entry point and overview
│
├── ✅ essentials/                           # Essential knowledge for all users
│   ├── ✅ index.md                          # Essentials overview
│   ├── ✅ getting-started.md                # Quick start guide
│   ├── ✅ key-concepts.md                   # Core concepts summary
│   ├── ✅ glossary.md                       # Standardized terminology definitions
│   ├── ✅ architecture-overview.md          # High-level architecture explanation
│   └── ✅ installation.md                   # Installation and setup guides
│
├── ❌ concepts/                             # Detailed conceptual documentation
│   ├── ✅ index.md                          # Concepts overview
│   ├── ✅ content-model/                    # Content model concepts
│   │   ├── ✅ index.md                      # Content model overview
│   │   ├── ✅ content-structure.md          # Content structure fundamentals
│   │   ├── ✅ metadata.md                   # Metadata system explanation
│   │   ├── ✅ uri-system.md                 # Content URI system details
│   │   └── ❌ specialized-content.md        # Specialized content types
│   │
│   ├── ❌ architecture/                     # Architectural concepts
│   │   ├── ❌ index.md                      # Architecture overview
│   │   ├── ✅ composition.md                # Composition architecture explanation
│   │   ├── ✅ layer-boundaries.md           # Layer boundaries and responsibilities
│   │   ├── ✅ environments.md               # Environment adaptability
│   │   └── ❌ plugin-system.md              # Plugin architecture
│   │
│   ├── ❌ data-flow/                        # Data flow concepts
│   │   ├── ✅ index.md                      # Data flow overview
│   │   ├── ✅ operations.md                 # Content operations
│   │   ├── ✅ events.md                     # Event system
│   │   └── ✅ transformation.md             # Content transformation pipeline
│   │
│   ├── ❌ history/                          # Historical concepts
│   │   ├── ❌ index.md                      # Historical overview
│   │   ├── ❌ historical-impermanence.md    # Historical impermanence concept
│   │   ├── ❌ versioning.md                 # Content versioning
│   │   └── ❌ vector-clock.md               # Vector clock system
│   │
│   └── ❌ collaboration/                    # Collaboration concepts
│       ├── ❌ index.md                      # Collaboration overview
│       ├── ❌ real-time-editing.md          # Real-time editing concepts
│       └── ❌ conflict-resolution.md        # Conflict resolution strategies
│
├── ❌ guides/                               # How-to guides and tutorials
│   ├── ✅ index.md                          # Guides overview
│   ├── ❌ basic/                            # Basic usage guides
│   │   ├── ❌ content-creation.md           # Creating and managing content
│   │   ├── ❌ content-querying.md           # Querying and filtering content
│   │   ├── ❌ content-observation.md        # Observing content changes
│   │   └── ✅ error-handling.md             # Error handling patterns
│   │
│   ├── ❌ advanced/                         # Advanced usage guides
│   │   ├── ❌ custom-adapters.md            # Creating custom adapters
│   │   ├── ❌ custom-middleware.md          # Creating custom middleware
│   │   ├── ❌ plugin-development.md         # Developing plugins
│   │   └── ❌ schema-validation.md          # Content validation strategies
│   │
│   ├── ❌ integration/                      # Integration guides
│   │   ├── ❌ react-integration.md          # React integration patterns
│   │   ├── ✅ node-integration.md           # Node.js integration
│   │   ├── ❌ browser-integration.md        # Browser-only integration
│   │   └── ❌ service-worker-integration.md # Service worker integration
│   │
│   └── ❌ migration/                        # Migration guides
│       ├── ❌ terminology-migration.md      # Adapting to standardized terminology
│       ├── ❌ type-system-migration.md      # Migrating to unified type system
│       └── ❌ api-changes.md                # Handling API changes between versions
│
├── ❌ reference/                            # API and type reference
│   ├── ✅ index.md                          # Reference overview
│   ├── ✅ api/                              # API reference
│   │   ├── ✅ index.md                      # API overview
│   │   ├── ✅ content-store.md              # ContentStore API
│   │   ├── ✅ content-adapter.md            # ContentAdapter API
│   │   ├── ✅ content-registry.md           # ContentRegistry API
│   │   ├── ❌ plugin-api.md                 # Plugin API
│   │   └── ❌ utilities.md                  # Utility functions
│   │
│   ├── ✅ types/                            # Type definitions
│   │   ├── ✅ index.md                      # Types overview
│   │   ├── ✅ content-types.md              # Core content types
│   │   ├── ✅ metadata-types.md             # Metadata types
│   │   ├── ✅ operation-types.md            # Operation types
│   │   ├── ✅ event-types.md                # Event and observer types
│   │   ├── ✅ error-types.md                # Error types
│   │   └── ❌ utility-types.md              # Utility types
│   │
│   ├── ✅ middleware/                       # Middleware reference
│   │   ├── ✅ index.md                      # Middleware overview
│   │   ├── ✅ composition.md                # Composition utilities
│   │   ├── ❌ validation.md                 # Validation middleware
│   │   ├── ❌ caching.md                    # Caching middleware
│   │   ├── ❌ logging.md                    # Logging middleware
│   │   └── ❌ error-handling.md             # Error handling middleware
│   │
│   └── ✅ adapters/                         # Adapter reference
│       ├── ✅ index.md                      # Adapters overview
│       ├── ✅ filesystem.md                 # FileSystem adapter
│       ├── ❌ memory.md                     # Memory adapter
│       ├── ❌ indexed-db.md                 # IndexedDB adapter
│       ├── ❌ http.md                       # HTTP adapter
│       └── ❌ service-worker.md             # ServiceWorker adapter
│
├── ✅ patterns/                             # Implementation patterns and recipes
│   ├── ✅ index.md                          # Patterns overview
│   ├── ✅ adapter-patterns.md               # Adapter implementation patterns
│   ├── ✅ middleware-patterns.md            # Middleware implementation patterns
│   ├── ✅ error-handling-patterns.md        # Error handling patterns
│   ├── ✅ capability-patterns.md            # Capability detection patterns
│   └── ✅ testing-patterns.md               # Testing patterns
│
├── ✅ architecture/                         # Architectural documentation
│   ├── ✅ index.md                          # Architecture overview
│   ├── ✅ layer-boundaries.md               # Technical layer boundaries implementation
│   ├── ✅ decisions/                        # Architecture decision records
│   │   ├── ✅ index.md                      # ADR overview
│   │   ├── ✅ ADR-001-MDX-Content-System.md # ADR for MDX content system
│   │   ├── ✅ ADR-002-Realtime-Content-Watching.md  # ADR for realtime content watching
│   │   ├── ✅ ADR-003-Registry-Facade-Architecture.md # ADR for registry facade
│   │   ├── ✅ ADR-004-Reactive-Content-Streams.md # ADR for reactive streams
│   │   ├── ✅ ADR-005-Content-Orchestration-Architecture.md # ADR for orchestration
│   │   ├── ✅ ADR-006-Distributed-Content-Architecture.md # ADR for distributed content
│   │   ├── ✅ ADR-007-Compositional-Content-Architecture.md # ADR for composition
│   │   ├── ✅ ADR-008-Historical-Collaborative-Content-Architecture.md # ADR for collaboration
│   │   ├── ✅ ADR-009-Unified-Type-System.md # ADR for type system unification
│   │   └── ✅ ADR-010-Plugin-Architecture.md # ADR for plugin architecture
│   │
│   ├── ✅ diagrams/                         # Architecture diagrams
│   │   ├── ✅ index.md                      # Diagrams overview
│   │   ├── ✅ layer-diagram.md              # System layers diagram
│   │   ├── ✅ data-flow-diagram.md          # Data flow diagram
│   │   └── ✅ component-diagram.md          # Component relationships diagram
│   │
│   └── ✅ standards/                        # Architectural standards
│       ├── ✅ index.md                      # Standards overview
│       ├── ✅ naming-conventions.md         # Naming conventions
│       ├── ✅ documentation-strategy.md     # Documentation strategy
│       └── ✅ implementation-standards.md   # Implementation standards
│
├── ✅ examples/                             # Code examples
│   ├── ❌ index.md                          # Examples overview
│   ├── ✅ basic/                            # Basic examples
│   │   ├── ❌ content-store.md              # Basic content store usage
│   │   ├── ❌ content-operations.md         # Basic content operations
│   │   └── ✅ error-handling.md             # Error handling examples
│   │
│   ├── ❌ advanced/                         # Advanced examples
│   │   ├── ❌ custom-adapter.md             # Custom adapter example
│   │   ├── ❌ middleware-chain.md           # Middleware composition example
│   │   └── ❌ plugin-example.md             # Plugin development example
│   │
│   └── ❌ integration/                      # Integration examples
│       ├── ❌ react-hooks.md                # React hooks example
│       ├── ❌ node-server.md                # Node.js server example
│       └── ❌ offline-app.md                # Offline-capable app example
│
├── ❌ testing/                              # Testing documentation
│   ├── ❌ index.md                          # Testing overview
│   ├── ❌ unit-testing.md                   # Unit testing guide
│   ├── ❌ integration-testing.md            # Integration testing guide
│   ├── ❌ adapter-testing.md                # Adapter testing strategies
│   └── ❌ mocking.md                        # Mocking strategies
│
├── ❌ troubleshooting/                      # Troubleshooting guide
│   ├── ❌ index.md                          # Troubleshooting overview
│   ├── ❌ common-errors.md                  # Common error scenarios
│   ├── ❌ debugging.md                      # Debugging techniques
│   ├── ❌ performance.md                    # Performance troubleshooting
│   └── ❌ faq.md                            # Frequently asked questions
│
├── ✅ business/                             # Business documentation
│   ├── ✅ index.md                          # Business overview
│   ├── ✅ value-proposition.md              # Core value proposition
│   ├── ✅ use-cases.md                      # Business use cases
│   ├── ✅ pricing-models.md                 # Pricing strategies
│   ├── ✅ growth-strategy.md                # Growth framework
│   ├── ✅ market-analysis.md                # Market positioning
│   ├── ✅ customer-stories.md               # Success stories
│   └── ✅ marketing-terms.md                # Marketing terminology for different audiences
│
├── ✅ project-management/                   # Project management documentation
│   ├── ✅ index.md                          # Project management overview
│   ├── ✅ planning/                         # Planning documentation
│   │   ├── ✅ index.md                      # Planning overview
│   │   ├── ✅ roadmap.md                    # Project roadmap and vision
│   │   ├── ✅ milestones.md                 # Project milestones and targets
│   │   ├── ✅ future-concepts.md            # Future development ideas
│   │   ├── ✅ architecture-refinement.md    # Architecture refinement plan
│   │   ├── ✅ documentation-restructuring.md # Documentation restructuring plan
│   │   ├── ✅ terminology-standardization.md # Terminology standardization plan
│   │   ├── ✅ type-system-consistency.md    # Type system consistency plan
│   │   └── ✅ archive/                      # Archive of past planning docs
│   │       ├── ✅ index.md                  # Archive overview
│   │       ├── ✅ roadmap-v1.md             # Previous roadmap version 1
│   │       ├── ✅ roadmap-v2.md             # Previous roadmap version 2
│   │       ├── ✅ milestones-v1.md          # Previous milestones version 1
│   │       └── ✅ milestones-v2.md          # Previous milestones version 2
│   │
│   ├── ✅ tasks/                            # Task management documentation
│   │   ├── ✅ index.md                      # Task management overview
│   │   ├── ✅ TODO.md                       # Current tasks and status
│   │   └── ✅ archive/                      # Archive of completed task lists
│   │       ├── ✅ index.md                  # Archive overview
│   │       ├── ✅ TODO-May03-25.md          # Archived task list for May 3, 2025
│   │       ├── ✅ TODO-May02-25.md          # Archived task list for May 2, 2025
│   │       ├── ✅ TODO-Apr29-25.md          # Archived task list for April 29, 2025
│   │       ├── ✅ TODO-Apr28-25.md          # Archived task list for April 28, 2025
│   │       ├── ✅ TODO-Apr24-25.md          # Archived task list for April 24, 2025
│   │       └── ✅ TODO-Apr23-25.md          # Archived task list for April 23, 2025
│   │
│   └── ✅ reviews/                          # Project review documentation
│       └── ✅ index.md                      # Reviews overview
│
├── ✅ templates/                            # Documentation templates
│   ├── ✅ index.md                          # Templates overview
│   ├── ✅ adr-template.md                   # Template for ADRs
│   ├── ✅ concept-document.md               # Template for concept documents
│   ├── ✅ implementation-cookbook.md        # Template for implementation guides
│   └── ✅ reference-types.md                # Template for type reference docs
│
└── ✅ progress-report.md                    # Project progress summary

Documentation Completion Status

• Architecture Documentation: ~95% complete
• Patterns Documentation: ~95% complete
• Project Management Documentation: ~100% complete
• Business Documentation: ~100% complete
• Templates Documentation: ~100% complete
• Essential Documentation: ~100% complete
• Type Reference Documentation: ~85% complete
• API Reference Documentation: ~40% complete
• Middleware Documentation: ~30% complete
• Adapters Documentation: ~30% complete
• Concepts Documentation: ~60% complete (data-flow complete)
• Examples/Guides: ~20% complete
• Testing Documentation: ~10% complete
• Troubleshooting Documentation: ~5% complete

Completed Documentation Tasks

The following high-priority documentation tasks have been completed:

1. Standardized glossary creation ✅

   • Added all standardized terms in docs/essentials/glossary.md
   • Documented URI terminology with clear examples
   • Added detailed event system terminology and migration path
   • Standardized temporal field naming
   • Documented content type MIME definitions
   • Included standardized operation-specific options terminology

2. Consistent event system implementation ✅

   • Standardized on observe() pattern across all content APIs
   • Added ContentChangeObserver interface with consistent parameter order
   • Implemented ObserveOptions interface for filtering observations
   • Added Unsubscribe type for consistent return values
   • Updated all documentation to demonstrate the preferred observe pattern

3. URI terminology standardization ✅

   • Replaced all ‘path’ references with ‘uri’ for content addressing
   • Reserved ‘path’ terminology exclusively for filesystem operations
   • Updated all documentation to use consistent URI terminology
   • Added conversion functions to clearly show translation between URIs and filesystem paths

4. Content Store interface unification ✅

   • Updated ContentStore interface in documentation to include observe method
   • Added proper documentation for the observe method
   • Updated usage examples to demonstrate observe pattern
   • Ensured consistent parameter naming and ordering across all methods

5. Essential onboarding documentation ✅

   • Created comprehensive essential documentation
   • Used consistent terminology aligned with glossary
   • Added cross-references between essential documents and references
   • Included proper code examples for all main operations and setups

Medium Priority Tasks

These tasks have been identified as medium priority for the next phase:

1. Implement consistent middleware definition

   • Adopt context-based approach as defined in architecture documentation
   • Update documentation and examples to reflect this pattern
   • Provide migration guide for existing code

2. Standardize options interfaces naming

   • Adopt {EntityName}Options format consistently
   • Update interface definitions and documentation
   • Document naming pattern in standards

Core Testing Infrastructure

1. Testing Framework Setup

• Configure Vitest for the project

  • Set up test environment configuration
  • Configure TypeScript integration
  • Add test coverage reporting
  • Set up browser testing capabilities

• Create test utilities

  • Implement assertion helpers for common patterns
  • Create test fixtures and mocks
  • Build environment simulation utilities
  • Set up performance measurement utilities

• Establish CI/CD pipeline

  • Configure GitHub Actions for continuous testing
  • Set up automated coverage reporting
  • Implement test result visualization
  • Create PR validation checks

2. Contract Testing Framework

• Develop interface contract testing system

  • Create base contract test template
  • Implement generic contract verification
  • Build interface compatibility tests
  • Develop property-based testing helpers

• Create content interface tests

  • Implement Content<T> interface contract tests
  • Create ContentMetadata contract tests
  • Develop ContentOperation contract tests
  • Build ContentURI validation tests

• Establish adapter contract tests

  • Create BaseAdapter contract definition
  • Implement capability detection tests
  • Build adapter factory validation tests
  • Develop cross-environment adapter tests

3. Documentation Testing

• Create documentation testing framework

  • Implement code example extraction
  • Set up code example validation
  • Create link validation utilities
  • Build API reference verification

• Set up example validation tests

  • Implement integration with test runner
  • Create snapshot testing for examples
  • Develop consistency verification
  • Build documentation-code sync validation

Core Implementation

1. Type System Implementation

• Implement core Content<T> interface

  • Define generic Content<T> interface
  • Create ContentMetadata interface
  • Implement ContentOperation types
  • Develop validation helpers for content types

• Build URI system

  • Implement ContentURI class
  • Create URI parsing and normalization
  • Develop URI validation utilities
  • Build URI factory functions

• Create error types

  • Implement ContentError base class
  • Create specialized error classes
  • Develop error recovery options
  • Build error serialization/deserialization

2. Function Composition

• Implement pipe() utility

  • Create synchronous pipe implementation
  • Develop async pipe implementation
  • Build generic type definitions
  • Create comprehensive tests and examples

• Create compose() utility

  • Implement synchronous compose
  • Create async compose implementation
  • Develop type-safe compose overloads
  • Build tests and documentation

• Develop middleware pattern

  • Create middleware function signature
  • Implement middleware context propagation
  • Build middleware composition utilities
  • Develop middleware testing helpers

3. Environment Detection

• Create environment detection utilities

  • Implement isNode() detection
  • Create isBrowser() detection
  • Develop isServiceWorker() detection
  • Build environment mocking for tests

• Implement feature detection

  • Create filesystem availability detection
  • Implement storage API detection
  • Develop network capability detection
  • Build feature detection testing utilities

Memory Adapter Implementation

1. Memory Adapter Core

• Create MemoryAdapter class

  • Implement read operation
  • Create write operation
  • Develop delete operation
  • Build list operation

• Add memory adapter enhancements

  • Implement search capabilities
  • Create content indexing
  • Develop content filtering
  • Build serialization/deserialization

2. Memory Adapter Tests

• Develop unit tests

  • Create basic operation tests
  • Implement edge case tests
  • Develop error handling tests
  • Build performance benchmarks

• Implement contract tests

  • Verify adapter interface compliance
  • Test capability reporting
  • Validate error handling
  • Confirm content transformation

3. Memory Adapter Documentation

• Create comprehensive documentation
  • Write adapter usage guide
  • Document API reference
  • Create usage examples
  • Develop best practices guide

Content Store Implementation

1. Core Store Interface

• Define ContentStore interface

  • Create store type definitions
  • Implement factory function interfaces
  • Develop store operation signatures
  • Build store configuration types

• Create basic store implementation

  • Implement store factory function
  • Create core operations (read, write, delete)
  • Develop content listing and searching
  • Build transaction support

2. Content Observation

• Implement observation system

  • Create observer interface
  • Implement subscribe/unsubscribe mechanism
  • Develop filtering for observations
  • Build memory leak prevention

• Add observation utilities

  • Create observation testing tools
  • Implement observer mocking
  • Develop observation persistence
  • Build performance optimizations

Testing Guides & Documentation

1. TDD Process Documentation

• Create TDD workflow documentation

  • Document interface definition process
  • Create contract testing guide
  • Develop implementation workflow
  • Build documentation sync process

• Develop testing cookbooks

  • Create adapter testing cookbook
  • Implement middleware testing guide
  • Develop React integration testing patterns
  • Build environment testing strategies

2. Knowledge Management Setup

• Create type system graph

  • Document interface relationships
  • Create component dependency graph
  • Develop API versioning strategy
  • Build API tracking automation

• Implement documentation-as-code practices

  • Create documentation testing process
  • Implement doctest capabilities
  • Develop example verification
  • Build documentation generation pipeline

Implementation Guidelines

Core Principles

Each implementation task should follow these core principles:

1. Test-First Development

   • Write tests before implementation
   • Define clear success criteria
   • Ensure edge cases are covered
   • Verify error handling

2. Interface-Driven Design

   • Start with clear interface definitions
   • Ensure type safety for all operations
   • Maintain backward compatibility
   • Document interface contracts

3. Documentation Sync

   • Update documentation alongside code
   • Ensure examples are tested
   • Maintain API reference accuracy
   • Document design decisions

4. Incremental Implementation

   • Implement features in small, testable increments
   • Regularly integrate with existing code
   • Continuously run tests
   • Refactor as needed

Testing Standards

All tests should follow these standards:

1. Isolation

   • Tests should not depend on each other
   • Use fresh fixtures for each test
   • Mock external dependencies
   • Reset state between tests

2. Coverage

   • Aim for >90% coverage of all code
   • Include edge cases and error paths
   • Test async behavior thoroughly
   • Include performance tests where relevant

3. Clarity

   • Tests should have clear descriptions
   • Organize tests by feature area
   • Use descriptive variable names
   • Document test intentions

4. Maintainability

   • Keep tests simple and focused
   • Avoid excessive mocking
   • Use testing utilities consistently
   • Maintain test-to-code proximity

Implementation Order

The implementation should proceed in this order to ensure a solid foundation:

1. Testing infrastructure and utilities
2. Core type system and interfaces
3. Function composition utilities
4. Memory adapter (for testing other components)
5. Environment detection
6. Store implementation with memory adapter
7. Observation system
8. Basic middleware implementations
9. React integration hooks and components

This order ensures that each component has the necessary dependencies available and tested before proceeding.

Type System Consistency

To maintain type system consistency, follow these guidelines:

1. Generic Pattern

   • Use Content<T> for all content interfaces
   • Adopt {Component}Options for configuration objects
   • Maintain {Operation}Result for operation returns
   • Use {Feature}Factory for factory functions

2. TypeScript Best Practices

   • Use readonly properties where applicable
   • Leverage discriminated unions for operation types
   • Implement proper error typing
   • Use conditional types for advanced use cases

3. API Consistency

   • Maintain consistent method naming
   • Ensure similar operations behave similarly
   • Use common patterns for async operations
   • Maintain consistent error handling

4. Documentation Requirements

   • Document generic type parameters
   • Include interface contract descriptions
   • Clearly indicate optional vs. required properties
   • Provide type compatibility notes

Knowledge Graph Maintenance

To mitigate context window limitations, maintain:

1. Interface Relation Graph

   • Document parent/child relationships
   • Track composition patterns
   • Map dependencies between components
   • Monitor API evolution

2. Contract Testing Sync

   • Ensure tests verify documented contracts
   • Maintain test-to-documentation traceability
   • Flag potential contract violations
   • Track interface changes over time

3. Documentation Verification

   • Regular verification of documentation accuracy
   • Automated extraction of interface definitions
   • Cross-referencing between documentation sources
   • Visualization of system architecture