# PMCP 1.0 Release Features Specification

## Overview
This document outlines the remaining features and improvements needed for PMCP to reach 1.0 production readiness. All implementations must follow Toyota Way extreme quality standards with comprehensive testing and documentation.

## Quality Standards (PMAT Quality Gates)
- **P**erformance: All features must maintain sub-millisecond overhead
- **M**aintainability: Clean, documented code with examples
- **A**vailability: Robust error handling and recovery
- **T**estability: Minimum 80% test coverage with unit, property, and integration tests

## Feature Categories

### 1. Developer Experience Improvements

#### 1.1 Procedural Macro System
**Priority: HIGH**
**Status: Not Started**

##### Tasks:
- [ ] Create `pmcp-macros` crate for procedural macros
  - [ ] Setup macro crate with syn, quote, proc-macro2
  - [ ] Add to workspace members
  - [ ] Configure feature flags
  
- [ ] Implement `#[tool]` attribute macro
  - [ ] Parse function signature and extract parameters
  - [ ] Generate JSON schema from parameter types
  - [ ] Auto-implement ToolHandler trait
  - [ ] Support async and sync functions
  - [ ] Handle return type serialization
  - [ ] Add validation attributes (min, max, pattern, etc.)
  
- [ ] Implement `#[tool_router]` macro for struct impls
  - [ ] Collect all tool methods in impl block
  - [ ] Generate router registration code
  - [ ] Support method visibility modifiers
  - [ ] Handle lifetime parameters
  
- [ ] Implement `#[prompt]` attribute macro
  - [ ] Parse prompt template and arguments
  - [ ] Generate PromptHandler implementation
  - [ ] Support template validation
  - [ ] Handle dynamic prompts
  
- [ ] Implement `#[resource]` attribute macro
  - [ ] Parse resource URI patterns
  - [ ] Generate ResourceHandler implementation
  - [ ] Support resource templates
  - [ ] Handle MIME type annotations

##### Testing Requirements:
- [ ] Unit tests for each macro component
- [ ] Compile-fail tests for invalid macro usage
- [ ] Property tests for schema generation
- [ ] Integration tests with server examples
- [ ] Doc tests showing macro usage patterns

##### Example Usage:
```rust
#[derive(Debug, Deserialize, JsonSchema)]
struct CalculateParams {
    #[schemars(range(min = 0, max = 1000))]
    a: i32,
    #[schemars(range(min = 0, max = 1000))]
    b: i32,
    #[schemars(regex(pattern = r"^(add|subtract|multiply|divide)$"))]
    operation: String,
}

#[tool_router]
impl Calculator {
    #[tool(name = "calculate", description = "Perform basic arithmetic")]
    async fn calculate(&self, params: Parameters<CalculateParams>) -> Result<i32> {
        match params.0.operation.as_str() {
            "add" => Ok(params.0.a + params.0.b),
            "subtract" => Ok(params.0.a - params.0.b),
            "multiply" => Ok(params.0.a * params.0.b),
            "divide" => {
                if params.0.b == 0 {
                    Err(Error::InvalidParams("Division by zero".into()))
                } else {
                    Ok(params.0.a / params.0.b)
                }
            }
            _ => Err(Error::InvalidParams("Unknown operation".into()))
        }
    }
}
```

### 2. Platform Support

#### 2.1 WASM/Browser Support
**Priority: MEDIUM**
**Status: Not Started**

##### Tasks:
- [ ] Add WASM target configuration
  - [ ] Configure wasm32-unknown-unknown target
  - [ ] Add wasm-bindgen dependencies
  - [ ] Setup conditional compilation for WASM
  
- [ ] Implement browser-compatible transports
  - [ ] WebSocket client for WASM
  - [ ] Fetch API integration for HTTP
  - [ ] WebRTC data channel support (stretch goal)
  
- [ ] Handle WASM-specific constraints
  - [ ] Replace tokio with wasm-compatible runtime
  - [ ] Use web-sys for browser APIs
  - [ ] Handle time/clock differences
  - [ ] Adapt file system operations
  
- [ ] Create browser examples
  - [ ] Basic WASM client example
  - [ ] React integration example
  - [ ] Vue.js integration example
  - [ ] Build and packaging setup

##### Testing Requirements:
- [ ] WASM unit tests with wasm-pack
- [ ] Browser integration tests with Playwright
- [ ] Cross-platform compatibility tests
- [ ] Performance benchmarks WASM vs native

### 3. Transport Layer Stabilization

#### 3.1 WebSocket Transport Enhancement
**Priority: HIGH**
**Status: Partially Implemented**

##### Tasks:
- [ ] Stabilize WebSocket implementation
  - [ ] Add connection pooling
  - [ ] Implement heartbeat/ping-pong
  - [ ] Handle reconnection gracefully
  - [ ] Add compression support (permessage-deflate)
  
- [ ] Add WebSocket-specific features
  - [ ] Binary frame support
  - [ ] Multiplexing over single connection
  - [ ] Backpressure handling
  - [ ] Rate limiting
  
- [ ] Security enhancements
  - [ ] WSS (WebSocket Secure) support
  - [ ] Origin validation
  - [ ] CSRF protection
  - [ ] Message size limits

##### Testing Requirements:
- [ ] Unit tests for all WebSocket features
- [ ] Property tests for message ordering
- [ ] Stress tests with 1000+ concurrent connections
- [ ] Network failure simulation tests
- [ ] Security penetration tests

### 4. Testing Infrastructure

#### 4.1 TypeScript SDK Integration Tests
**Priority: HIGH**
**Status: Not Started**

##### Tasks:
- [ ] Setup cross-language test harness
  - [ ] Docker compose for test environment
  - [ ] TypeScript SDK server fixtures
  - [ ] Rust client test scenarios
  - [ ] Bidirectional communication tests
  
- [ ] Protocol compliance tests
  - [ ] Version negotiation tests
  - [ ] Capability exchange tests
  - [ ] Error handling compatibility
  - [ ] Edge case handling
  
- [ ] Performance comparison tests
  - [ ] Throughput benchmarks
  - [ ] Latency measurements
  - [ ] Memory usage comparison
  - [ ] CPU usage profiling

##### Testing Requirements:
- [ ] Automated CI/CD integration
- [ ] Test matrix for multiple Node/TS versions
- [ ] Coverage reports for both SDKs
- [ ] Performance regression detection

#### 4.2 Fuzzing Infrastructure
**Priority: MEDIUM**
**Status: Not Started**

##### Tasks:
- [ ] Setup cargo-fuzz
  - [ ] Create fuzz targets for protocol parsing
  - [ ] Fuzz JSON-RPC message handling
  - [ ] Fuzz transport layer
  - [ ] Fuzz authentication flows
  
- [ ] Property-based testing expansion
  - [ ] State machine properties
  - [ ] Protocol invariants
  - [ ] Concurrency properties
  - [ ] Security properties

##### Testing Requirements:
- [ ] 24-hour fuzz runs in CI
- [ ] Crash reproduction tests
- [ ] Coverage-guided fuzzing
- [ ] Security vulnerability detection

### 5. Documentation and Examples

#### 5.1 Advanced Usage Documentation
**Priority: MEDIUM**
**Status: Not Started**

##### Tasks:
- [ ] Middleware composition guide
  - [ ] Custom middleware implementation
  - [ ] Middleware ordering best practices
  - [ ] Performance implications
  - [ ] Real-world examples
  
- [ ] Session management guide
  - [ ] Session persistence strategies
  - [ ] Distributed session handling
  - [ ] Security best practices
  - [ ] Performance tuning
  
- [ ] Production deployment guide
  - [ ] Container deployment
  - [ ] Kubernetes configurations
  - [ ] Monitoring and observability
  - [ ] Scaling strategies
  
- [ ] Migration guide from TypeScript SDK
  - [ ] Feature mapping
  - [ ] Code translation patterns
  - [ ] Common pitfalls
  - [ ] Performance comparisons

##### Documentation Requirements:
- [ ] All code examples must compile
- [ ] Doc tests for all examples
- [ ] API reference generation
- [ ] Architecture diagrams

### 6. Performance Optimizations

#### 6.1 SIMD Optimizations
**Priority: LOW**
**Status: Feature Flagged**

##### Tasks:
- [ ] Implement SIMD JSON parsing
  - [ ] Use simdjson-rust bindings
  - [ ] Fallback for non-SIMD platforms
  - [ ] Benchmark improvements
  
- [ ] SIMD message serialization
  - [ ] Vectorized string operations
  - [ ] Batch message processing
  - [ ] Memory alignment optimizations

##### Testing Requirements:
- [ ] Performance benchmarks with/without SIMD
- [ ] Correctness tests across platforms
- [ ] CPU feature detection tests

### 7. Protocol Alignment

#### 7.1 TypeScript SDK v1.17.2+ Compatibility
**Priority: HIGH**
**Status: Ongoing**

##### Tasks:
- [ ] Audit TypeScript SDK changes
  - [ ] Review changelog for breaking changes
  - [ ] Update protocol types if needed
  - [ ] Ensure feature parity
  
- [ ] Implement missing features
  - [ ] Any new capabilities
  - [ ] Protocol extensions
  - [ ] New transport options

##### Testing Requirements:
- [ ] Compatibility test suite
- [ ] Version negotiation tests
- [ ] Backward compatibility tests

## Implementation Plan

### Phase 1: Developer Experience (Weeks 1-3)
1. Implement procedural macro system
2. Create comprehensive examples
3. Update all existing examples to use macros

### Phase 2: Platform Support (Weeks 4-5)
1. Add WASM support
2. Stabilize WebSocket transport
3. Create browser examples

### Phase 3: Testing Infrastructure (Weeks 6-7)
1. Setup TypeScript SDK integration tests
2. Implement fuzzing infrastructure
3. Achieve 80% test coverage

### Phase 4: Documentation & Polish (Week 8)
1. Complete all documentation
2. Performance optimizations
3. Final protocol alignment

## Success Metrics
- [ ] 80% or higher test coverage
- [ ] All examples compile and run
- [ ] Zero critical security vulnerabilities
- [ ] Sub-millisecond overhead for macro generated code
- [ ] Full compatibility with TypeScript SDK v1.17.2+
- [ ] Successful deployment in production environment

## Risk Mitigation
- **Macro Complexity**: Start with simple cases, iterate
- **WASM Compatibility**: May need to feature-gate some functionality
- **Testing Time**: Parallelize test development across team
- **Breaking Changes**: Maintain backward compatibility with 0.6.x

## Dependencies
- syn = "2.0"
- quote = "1.0"
- proc-macro2 = "1.0"
- schemars = "0.8"
- wasm-bindgen = "0.2"
- web-sys = "0.3"
- cargo-fuzz = "0.11"

## Timeline
- **Target Release Date**: 8 weeks from start
- **Beta Release**: Week 6
- **Release Candidate**: Week 7
- **Production Release**: Week 8

## Notes
- All features must pass PMAT quality gates
- Maintain backward compatibility where possible
- Follow semantic versioning strictly
- Document all breaking changes clearly