# PMCP Roadmap Specification

This document defines the development roadmap for the PMCP (Pragmatic Model Context Protocol) SDK, following Toyota Way principles and PAIML quality standards.

## Project Vision

PMCP aims to be the highest-quality Rust implementation of the Model Context Protocol, maintaining full TypeScript SDK compatibility while providing superior performance, safety, and developer experience.

**Code Name**: *Angel Rust*

## Quality Standards (Zero Tolerance)

### Core Requirements
- **Complexity**: ≤25 cognitive complexity per function
- **Technical Debt**: 0 SATD comments allowed
- **Test Coverage**: 80%+ with comprehensive testing
- **Documentation**: All public APIs documented with examples
- **Performance**: 10x faster than TypeScript SDK
- **Memory Safety**: Zero unwraps in production code

### ALWAYS Requirements for New Features
Every new feature MUST include:
1. **Fuzz Testing**: Property-based fuzzing for robustness
2. **Property Tests**: Invariant verification with quickcheck
3. **Unit Tests**: Comprehensive unit test coverage
4. **Example**: Working `cargo run --example` demonstration
5. **Documentation**: Doctests with real-world examples
6. **Integration**: Full client-server integration tests

## Current Sprint: v1.3.0 Quality Gates & Roadmap Infrastructure

- **Duration**: 1 day (2025-08-22)
- **Priority**: P0 - Critical Quality Infrastructure
- **Dependencies**: Toyota Way foundations, PAIML quality patterns
- **Major Features**: Quality gates implementation, roadmap management, testing infrastructure

### v1.3.0 Sprint Tasks

| ID | Description | Status | Complexity | Priority |
|----|-------------|--------|------------|---------|
| PMCP-3001 | Implement quality gates in Makefile | 🚧 | Medium | P0 |
| PMCP-3002 | Create roadmap management system | 🚧 | Low | P0 |
| PMCP-3003 | Add comprehensive property testing | 📋 | High | P0 |
| PMCP-3004 | Implement fuzz testing framework | 📋 | High | P0 |
| PMCP-3005 | Create integration test examples | 📋 | Medium | P1 |
| PMCP-3006 | Update CLAUDE.md with workflow | 🚧 | Low | P0 |
| PMCP-3007 | Release v1.3.0 with quality standards | 📋 | Medium | P0 |

## Previous Sprints

### v1.2.1 Toyota Way Implementation ✅ COMPLETED
- **Duration**: Multiple iterations
- **Completion**: 2025-08-22
- **Major Achievement**: Toyota Way quality principles implementation
- **Test Pass Rate**: 100% (comprehensive test suite)
- **Quality Gates**: ACHIEVED (complexity ≤25, documentation comprehensive)

#### v1.2.1 Features Implemented:
1. **Toyota Way Principles**: Jidoka, Genchi Genbutsu, Kaizen implementation
2. **Quality Excellence**: TDG scoring, quality badges, comprehensive metrics
3. **Full Protocol Support**: Complete MCP v1.17.2+ compatibility
4. **Performance**: 16x faster than TypeScript SDK, 50x lower memory
5. **Advanced Features**: WASM support, procedural macros, OAuth
6. **Testing Infrastructure**: 200+ examples, property tests, fuzzing

## Roadmap by Version

### v1.3.0 (Current Sprint) - Quality Infrastructure
**Timeline**: 2025-08-22 (1 day)
**Focus**: Quality gates, testing infrastructure, roadmap management

**Features**:
- Quality gates enforcement (pre-commit hooks)
- Comprehensive property testing framework  
- Fuzz testing integration
- Toyota Way workflow documentation
- Roadmap management system

**Testing Requirements**:
- All new quality tools must have property tests
- Fuzz testing for robustness verification
- Integration examples demonstrating usage
- Performance benchmarks for quality checks

### v1.4.1 - Developer Experience & TypeScript Parity ✅ COMPLETED
- **Status**: Released to crates.io (2025-01-16)
- **Focus**: Enhanced developer ergonomics and TypeScript SDK compatibility
- **Key Features**: ToolResult type alias, comprehensive testing, new examples

### v1.5.0 - Advanced Transport Features (Future)
**Timeline**: Q4 2025 (2-3 days)
**Focus**: Transport layer enhancements, advanced protocols

**Features**:
- WebSocket server implementation completion
- Advanced HTTP/SSE transport optimizations
- Connection pooling and load balancing
- Transport middleware system
- Advanced error recovery mechanisms

**Testing Requirements**:
- Transport-specific property tests
- Load testing and stress testing
- Failure injection testing
- Cross-transport compatibility verification

### v1.5.0 - Enhanced Developer Experience  
**Timeline**: Q1 2026 (3-4 days)
**Focus**: Developer tools, debugging, observability

**Features**:
- Enhanced procedural macros
- Built-in debugging tools
- Comprehensive observability
- Performance profiling integration
- Developer productivity enhancements

**Testing Requirements**:
- Macro expansion testing
- Observability data validation
- Performance regression testing
- Developer workflow integration tests

### v2.0.0 - Next Generation Architecture
**Timeline**: Q2 2026 (1-2 weeks)
**Focus**: Breaking changes, architectural improvements

**Features**:
- Async trait improvements
- Enhanced type safety
- Protocol version negotiation
- Advanced security features
- Breaking API improvements

**Testing Requirements**:
- Migration testing from v1.x
- Backward compatibility verification
- Security penetration testing
- Full protocol compliance testing

## Backlog (Prioritized)

| ID | Description | Status | Complexity | Priority | Target Version |
|----|-------------|--------|------------|----------|----------------|
| PMCP-4001 | Advanced WebSocket features | 📋 | High | P1 | v1.5.0 |
| PMCP-4002 | Transport load balancing | 📋 | High | P1 | v1.5.0 |
| PMCP-4003 | Enhanced macro system | 📋 | Medium | P1 | v1.5.0 |
| PMCP-4004 | Observability framework | 📋 | Medium | P1 | v1.5.0 |
| PMCP-4005 | Security audit framework | 📋 | High | P0 | v2.0.0 |
| PMCP-4006 | Protocol v2.0 support | 📋 | High | P0 | v2.0.0 |
| PMCP-4007 | Performance optimization | 📋 | Medium | P2 | v1.6.0 |
| PMCP-4008 | Extended language support | 📋 | Low | P2 | v1.7.0 |

## Quality Gates Definition

### Pre-Commit Quality Gates
```bash
# MANDATORY checks before any commit
make pre-commit-gate     # Comprehensive quality validation
make format-check        # Rust formatting verification
make clippy-check        # Zero warnings policy
make test-all           # All tests must pass
make doc-test           # Documentation testing
make examples-test      # Example verification
```

### Release Quality Gates
```bash
# MANDATORY checks before any release
make quality-gate-strict  # Extreme quality validation
make property-test       # Property-based testing
make fuzz-test          # Fuzzing verification
make integration-test   # Full integration testing
make security-audit     # Security vulnerability scan
make performance-test   # Performance regression check
```

### Continuous Quality Monitoring
- **Complexity Tracking**: Maximum ≤25 per function
- **Coverage Monitoring**: Minimum 80% maintained
- **Performance Benchmarks**: No regression tolerance
- **Security Scanning**: Automated vulnerability detection
- **Documentation Sync**: Automatic doc generation and validation

## Toyota Way Implementation

### Kaizen (Continuous Improvement)
- File-by-file quality improvement approach
- Measurable quality metrics (TDG scores)
- Iterative enhancement with clear targets
- Regular retrospectives and process refinement

### Genchi Genbutsu (Go and See)
- Direct measurement of code quality
- Evidence-based decision making
- Real-world usage validation
- User feedback integration

### Jidoka (Automation with Human Touch)
- Automated quality gates with manual oversight
- Stop-the-line principle for quality issues
- Human verification of automated decisions
- Intelligent error detection and handling

## Performance Targets

### Current Achievements (v1.2.1)
- **Speed**: 16x faster than TypeScript SDK
- **Memory**: 50x lower memory usage
- **Startup**: <100ms cold start
- **Throughput**: 10K+ messages/second

### Future Targets (v2.0.0)
- **Speed**: 25x faster than TypeScript SDK
- **Memory**: 100x lower memory usage  
- **Startup**: <50ms cold start
- **Throughput**: 50K+ messages/second
- **Latency**: <1ms p99 response time

## Risk Management

### High Risk Areas
- **WebSocket Implementation**: Complex async handling
- **Protocol Compatibility**: Breaking changes in MCP spec
- **Performance Optimization**: Complexity vs. speed tradeoffs
- **Security Features**: Cryptographic implementation complexity

### Risk Mitigation
- **Comprehensive Testing**: Property tests, fuzz tests, integration tests
- **Incremental Development**: Small, verifiable changes
- **Community Feedback**: Early and frequent user validation
- **Security Review**: Third-party security audits for sensitive code

## Success Metrics

### Technical Metrics
- **Test Coverage**: 80%+ maintained
- **Performance**: Benchmarks within target ranges
- **Quality**: Zero tolerance for defects
- **Documentation**: 100% API coverage

### Adoption Metrics
- **GitHub Stars**: Growth trajectory
- **Crates.io Downloads**: Monthly download growth
- **Community Contributions**: Active contributor count
- **Production Usage**: Enterprise adoption tracking

## Release Process

### Version Numbering
- **Major (X.y.z)**: Breaking changes, API incompatibility
- **Minor (x.Y.z)**: New features, backward compatible
- **Patch (x.y.Z)**: Bug fixes, no new features

### Release Criteria
1. All quality gates pass
2. Performance benchmarks meet targets
3. Security audit completed
4. Documentation updated and validated
5. Integration tests with real-world scenarios
6. Community feedback incorporated

### Release Timeline
- **Patch Releases**: As needed for critical fixes
- **Minor Releases**: Monthly or bi-monthly
- **Major Releases**: Quarterly or as needed for breaking changes

## Contributing Guidelines

### Code Standards
- Follow Toyota Way principles
- Implement ALWAYS requirements (fuzz, property, unit, example)
- Maintain zero-tolerance quality standards
- Include comprehensive documentation

### Pull Request Process
1. Fork repository and create feature branch
2. Implement feature with full testing
3. Run all quality gates locally
4. Submit PR with detailed description
5. Address review feedback
6. Merge after approval and CI success

### Community Engagement
- Regular community calls
- Discord/Matrix chat for real-time discussion  
- GitHub Discussions for feature requests
- RFC process for major changes

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**Last Updated**: 2025-08-22
**Next Review**: 2025-09-22
**Maintained By**: PMCP Core Team