# Pair Programming System

## Overview

The Pair Programming System in Claude-Flow enables collaborative development between human developers and AI agents with real-time verification, continuous validation, and automated quality enforcement. It implements a **"verification-first"** approach where every change is validated against truth thresholds before acceptance.

## Key Features

- **🔍 Real-time Verification**: Every code change is instantly verified
- **🎯 Truth Enforcement**: Maintains 95% truth accuracy threshold
- **🔄 Auto-rollback**: Automatic recovery from verification failures
- **👥 Collaborative Intelligence**: Human creativity + AI verification
- **📊 Continuous Monitoring**: Real-time quality metrics and feedback
- **🛡️ Byzantine Fault Tolerance**: Protection against incorrect changes

## System Architecture

```
┌─────────────────────────────────────────────────────────────┐
│                  Pair Programming System                      │
├─────────────────────────────────────────────────────────────┤
│                                                               │
│  ┌──────────────┐  ┌──────────────┐  ┌──────────────┐      │
│  │   Human      │  │     AI       │  │ Verification │      │
│  │  Developer   │←→│    Agent     │←→│   Engine     │      │
│  └──────────────┘  └──────────────┘  └──────────────┘      │
│         ↓                  ↓                  ↓              │
│  ┌────────────────────────────────────────────────────┐      │
│  │           Continuous Integration Pipeline           │      │
│  └────────────────────────────────────────────────────┘      │
│         ↓                  ↓                  ↓              │
│  ┌──────────────┐  ┌──────────────┐  ┌──────────────┐      │
│  │  File Watch  │  │   Testing    │  │   Rollback   │      │
│  │   System     │  │  Framework   │  │   Manager    │      │
│  └──────────────┘  └──────────────┘  └──────────────┘      │
│                                                               │
└─────────────────────────────────────────────────────────────┘
```

## Getting Started

### Quick Start with Verification

```bash
# Initialize project with Pair Programming enabled (local version)
./claude-flow init --pair

# Initialize with both verification and pair programming
./claude-flow init --verify --pair

# After npm publish, will be available as:
npx claude-flow@alpha init --verify --pair

# Force overwrite existing configuration
npx claude-flow@alpha init --verify --pair --force
```

This creates a specialized `CLAUDE.md` configuration with:
- Pair Programming mode pre-configured
- Manual verification control (no auto-spam)
- Interactive session with readline interface
- Truth threshold set to 0.95
- Smart verification with weighted scoring

### Basic Usage

Start a pair programming session:
```bash
# Basic interactive session
npx claude-flow@alpha pair --start

# With manual verification
npx claude-flow@alpha pair --start --verify

# With automatic verification (60s cooldown)
npx claude-flow@alpha pair --start --verify --auto

# With testing enabled
npx claude-flow@alpha pair --start --test
```

### Configuration Options

```bash
# Set custom verification threshold
npx claude-flow@alpha pair --threshold 0.95

# Enable verification (manual by default)
npx claude-flow@alpha pair --verify

# Enable automatic verification with cooldown
npx claude-flow@alpha pair --verify --auto

# Set programming mode
npx claude-flow@alpha pair --mode <driver|navigator|switch>

# Run in background
npx claude-flow@alpha pair --start --background
```

## Verification Modes

### 1. **Strict Mode** (Recommended for Production)
```bash
npx claude-flow@alpha pair --mode strict
```
- Truth threshold: 0.95
- Auto-rollback: Enabled
- All checks: Required
- Real-time validation: Enabled

### 2. **Standard Mode** (Default)
```bash
npx claude-flow@alpha pair --mode standard
```
- Truth threshold: 0.85
- Auto-rollback: Optional
- Core checks: Required
- Real-time validation: Enabled

### 3. **Development Mode**
```bash
npx claude-flow@alpha pair --mode development
```
- Truth threshold: 0.75
- Auto-rollback: Disabled
- Basic checks: Required
- Real-time validation: Optional

## Workflow Process

### 1. Session Initialization
```
Developer: npx claude-flow@alpha pair --start --verify
System: ✅ Interactive session started
        ✅ Verification ready (manual mode)
        ✅ Session commands available
        ✅ Readline interface active
        
💻 pair> /help  # Shows available commands
```

### 2. Interactive Commands
```bash
# During session, use these commands:
/verify   - Run verification manually
/test     - Execute test suite
/status   - Show session status
/metrics  - Display quality history
/auto     - Toggle auto-verification
/switch   - Change driver/navigator role
/suggest  - Get AI suggestions
/commit   - Pre-commit verification
/end      - Exit session
```

### 3. Optimized Verification Flow
```javascript
// Manual verification (recommended)
onCommand('/verify') {
  if (!isVerifying) {
    results = await runWeightedChecks({
      typeCheck: 0.4,   // Most important
      linting: 0.3,     // Code quality
      build: 0.3        // Compilation
    });
    
    // Intelligent scoring based on error count
    score = calculateGraduatedScore(results);
    displayResults(score);
  }
}

// Optional auto-verification with cooldown
if (autoVerify && timeSinceLastCheck > 60000) {
  await runVerification();
}
```

## Optimized Verification System

### Weighted Quality Checks
```javascript
const codeChecks = {
  typeCheck: {
    weight: 0.40,  // Increased weight for type safety
    command: 'npm run typecheck',
    required: true
  },
  linting: {
    weight: 0.30,
    command: 'npm run lint',
    required: true
  },
  build: {
    weight: 0.30,
    command: 'npm run build',
    required: true
  }
};

// Intelligent scoring algorithm
function calculateScore(output) {
  if (output.includes('error')) {
    const errorCount = (output.match(/error/gi) || []).length;
    return Math.max(0.2, 1.0 - (errorCount * 0.1));
  } else if (output.includes('warning')) {
    const warningCount = (output.match(/warning/gi) || []).length;
    return Math.max(0.7, 1.0 - (warningCount * 0.05));
  }
  return 1.0;
}
```

### Performance Checks
```javascript
const performanceChecks = {
  buildTime: {
    threshold: 30000, // 30 seconds
    weight: 0.15
  },
  bundleSize: {
    threshold: 5000000, // 5MB
    weight: 0.10
  },
  testDuration: {
    threshold: 60000, // 60 seconds
    weight: 0.10
  }
};
```

## AI Agent Capabilities

### Code Review
The AI agent provides:
- **Syntax validation**: Immediate syntax error detection
- **Best practices**: Suggests idiomatic code patterns
- **Security analysis**: Identifies potential vulnerabilities
- **Performance optimization**: Suggests efficiency improvements
- **Documentation**: Generates inline comments and docs

### Intelligent Suggestions
```javascript
// Example AI suggestion
Developer: writes function without error handling

AI Agent: "Consider adding error handling:
```javascript
try {
  const result = await apiCall();
  return result;
} catch (error) {
  logger.error('API call failed:', error);
  throw new ApiError('Failed to fetch data', error);
}
```"

Verification: ✅ Score improved from 0.82 to 0.96
```

## Integration with Development Tools

### VSCode Integration
```json
// .vscode/settings.json
{
  "claude-flow.pair": {
    "enabled": true,
    "autoStart": true,
    "threshold": 0.95,
    "mode": "strict"
  }
}
```

### Git Hooks
```bash
# .git/hooks/pre-commit
#!/bin/bash
npx claude-flow@alpha pair --verify --threshold 0.95
```

### CI/CD Pipeline
```yaml
# .github/workflows/pair-verification.yml
name: Pair Programming Verification
on: [push, pull_request]

jobs:
  verify:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v3
      - name: Run Pair Verification
        run: |
          npx claude-flow@alpha pair --verify
          npx claude-flow@alpha truth --threshold 0.95
```

## Monitoring and Metrics

### Interactive Session Display
```
💻 pair> /status

📊 Session Status
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
Session ID: pair_1755038032183
Duration: 45 minutes
Current Role: DRIVER
Mode: switch
Auto-Verify: Disabled
Last Verification: 0.82 (14:23:45)

💻 pair> /metrics

📈 Quality Metrics
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
Verification History:
  1. ████████████████ 0.82 - 14:20:00
  2. ██████████████████ 0.91 - 14:22:30
  3. ████████████ 0.65 - 14:23:45
  4. ████████████████████ 0.98 - 14:25:15
  
  Average: 0.84
  
Test Results:
  1. ✅ 14:21:00
  2. ❌ 14:23:00
  3. ✅ 14:25:00
  
  Success Rate: 67%
```

### Session Commands
```bash
# Check current status
/status

# View quality metrics
/metrics

# Toggle auto-verification
/auto

# Run manual verification
/verify

# Run tests
/test
```

## Advanced Features

### 1. Pattern Learning
The system learns from your coding patterns:
```javascript
const patterns = {
  errorHandling: learnPattern('error-handling'),
  naming: learnPattern('variable-naming'),
  structure: learnPattern('code-structure')
};

// Applied during verification
verification.applyLearnedPatterns(patterns);
```

### 2. Multi-Agent Collaboration
```bash
# Enable multiple specialized agents
npx claude-flow@alpha pair --agents "coder,reviewer,tester"

# Each agent focuses on specific aspects:
# - Coder: Implementation quality
# - Reviewer: Code review and standards
# - Tester: Test coverage and quality
```

### 3. Context Awareness
```javascript
// System maintains context across files
const context = {
  project: analyzeProject(),
  dependencies: analyzeDependencies(),
  architecture: analyzeArchitecture(),
  history: analyzeGitHistory()
};

// Context-aware suggestions
suggestions = generateSuggestions(change, context);
```

## Best Practices

### 1. Start Sessions Early
Begin pair programming at the start of your work:
```bash
# Morning routine
cd my-project
npx claude-flow@alpha pair --start --mode strict
```

### 2. Incremental Development
Make small, verifiable changes:
```javascript
// Good: Single responsibility
function validateEmail(email) {
  return EMAIL_REGEX.test(email);
}

// Avoid: Multiple responsibilities in one change
function validateAndSaveUser(userData) {
  // Too many changes for single verification
}
```

### 3. Review Verification Feedback
```bash
# Always check why verification failed
npx claude-flow@alpha truth --analyze

# Understand patterns
npx claude-flow@alpha pair --report
```

## Troubleshooting

### Common Issues

#### 1. Verification Loop / Spam
```bash
# Solution: Use manual verification
npx claude-flow@alpha pair --start --verify
# Use /verify command when needed

# If auto-verify is needed, it has 60s cooldown
npx claude-flow@alpha pair --start --verify --auto
```

#### 2. Low Verification Scores
```bash
# Check specific issues
/verify  # See which checks fail

# Common fixes:
npm run typecheck  # Fix TypeScript errors
npm run lint --fix  # Auto-fix linting
npm run build      # Check compilation
```

#### 3. Session Not Responding
```bash
# End current session
npx claude-flow@alpha pair --end

# Check for active sessions
npx claude-flow@alpha pair --status

# Start fresh
npx claude-flow@alpha pair --start
```

#### 4. Performance Issues
```bash
# Use manual verification only
npx claude-flow@alpha pair --start --verify
# Don't use --auto flag

# Check metrics to identify patterns
/metrics  # During session
```

## Training Integration (NEW!)

The Pair Programming system now integrates with the verification-training system for continuous improvement:

### How It Works
1. **Every pair session generates verification data**
2. **Verification results feed the training system**
3. **System learns which patterns lead to success**
4. **Future sessions benefit from improved predictions**

### Using Training with Pair Programming

```bash
# Start pair programming with verification
./claude-flow pair --start

# After session, feed results to training
./claude-flow verify-train feed

# Check improvement over time
./claude-flow verify-train status

# Get predictions for next session
./claude-flow verify-train predict default coder
```

### Learning Benefits
- **Agent reliability improves** with each session
- **Common failure patterns** are identified
- **Recommendations** become more accurate
- **Verification thresholds** adapt to project needs

## Configuration Files

### Project Configuration
Create `.claude-flow/pair.json`:
```json
{
  "mode": "strict",
  "threshold": 0.95,
  "autoRollback": true,
  "checks": {
    "compile": true,
    "test": true,
    "lint": true,
    "security": true,
    "performance": false
  },
  "agents": ["coder", "reviewer"],
  "monitoring": {
    "realtime": true,
    "dashboard": true,
    "notifications": true
  },
  "training": {
    "enabled": true,
    "learningRate": 0.1,
    "autoFeed": true
  }
```

### Personal Preferences
Create `~/.claude-flow/preferences.json`:
```json
{
  "pair": {
    "defaultMode": "strict",
    "autoStart": false,
    "verbosity": "normal",
    "theme": "dark",
    "notifications": {
      "success": false,
      "failure": true,
      "rollback": true
    }
  }
}
```

## Security Considerations

### Code Protection
- All changes are verified before acceptance
- Cryptographic signing of verified changes
- Audit trail of all modifications
- Rollback capability for security issues

### Privacy
- Local verification (no code sent to external servers)
- Optional telemetry (disabled by default)
- Encrypted storage of session data
- Configurable data retention

## Performance Optimization (NEW!)

### Verification Control
```javascript
// No more automatic spam - manual control
class OptimizedSession {
  constructor() {
    this.autoVerify = false;  // Off by default
    this.verificationCooldown = 60000;  // 60s minimum
    this.isVerifying = false;  // Prevent concurrent checks
  }
  
  async runVerification() {
    // Check cooldown
    if (Date.now() - this.lastCheck < this.cooldown) {
      return; // Skip if too soon
    }
    
    // Prevent concurrent runs
    if (this.isVerifying) return;
    
    this.isVerifying = true;
    // Run weighted checks...
    this.isVerifying = false;
  }
}
```

### Intelligent Scoring
```javascript
// Graduated scoring based on actual errors
function calculateScore(output) {
  const errors = (output.match(/error/gi) || []).length;
  const warnings = (output.match(/warning/gi) || []).length;
  
  // Deduct 0.1 per error, 0.05 per warning
  let score = 1.0;
  score -= errors * 0.1;
  score -= warnings * 0.05;
  
  // Minimum scores to avoid 0
  if (errors > 0) return Math.max(0.2, score);
  if (warnings > 0) return Math.max(0.7, score);
  return score;
}
```

### Resource Usage
```
Before Optimization:
- Verification every 30 seconds
- CPU usage: 10-17% constant
- 120 checks per hour

After Optimization:
- Manual verification only
- CPU usage: <1% idle
- On-demand checks only
```

## Future Roadmap

### Planned Features
1. **IDE Plugins**: Native VSCode, IntelliJ, and Vim integrations
2. **Voice Control**: Voice-activated pair programming
3. **AR/VR Support**: Immersive pair programming environments
4. **Team Mode**: Multiple developers with AI agents
5. **Learning Mode**: AI learns your coding style over time

### Research Areas
- Predictive verification based on code patterns
- Natural language programming interfaces
- Automated refactoring suggestions
- Cross-language pair programming support

## Community and Support

### Getting Help
```bash
# Built-in help
npx claude-flow@alpha pair --help

# Interactive tutorial
npx claude-flow@alpha pair --tutorial

# Community forum
https://github.com/ruvnet/claude-flow/discussions
```

### Contributing
We welcome contributions to improve the Pair Programming System:
1. Fork the repository
2. Create a feature branch
3. Implement your enhancement
4. Ensure verification passes
5. Submit a pull request

## Related Documentation

- [Truth Verification System](./Truth-Verification-System.md)
- [Agent System Overview](./Agent-System-Overview.md)
- [Workflow Orchestration](./Workflow-Orchestration.md)
- [Best Practices Guide](./Development-Patterns.md)

---

*The Pair Programming System transforms software development into a collaborative, verified, and continuously validated process. By combining human creativity with AI verification, we achieve unprecedented code quality and reliability.*