System Integration Validator

Validates system integration before deployment.

When to Use

• Pre-deployment validation
• Checking port availability
• Verifying database connections
• Debugging stuck workflows
• Detecting dead ends or circular dependencies

Workflow

Step 1: Check Ports

Verify all required ports are free.

Step 2: Verify Databases

Test PostgreSQL and Redis connections.

Step 3: Validate API Contracts

Ensure frontend ↔ backend match.

Step 4: Analyze Data Flow

Detect dead ends, orphan inputs, bottlenecks.

Pre-Deployment Checklist

1. Ports - All required ports free
2. Database - Connection, pool, migrations OK
3. API Contract - Frontend ↔ Backend match
4. Data Flow - No dead ends or loops

Port Check

for port in 3000 3001 5432 6379 8080; do
  lsof -i :$port > /dev/null 2>&1 && echo "⚠️ $port IN USE" || echo "✅ $port free"
done

Database Check

pg_isready -h localhost -p 5432 && echo "✅ PostgreSQL OK"
redis-cli ping && echo "✅ Redis OK"

Flow Analysis

Look for:

• Dead ends: Output never consumed
• Orphan inputs: Input never provided
• Bottlenecks: High in-degree (>3 inputs)
• Circular deps: A → B → A

Common Blocks

// ❌ No timeout
await fetch(url)

// ✓ With timeout
const ctrl = new AbortController()
setTimeout(() => ctrl.abort(), 5000)
await fetch(url, { signal: ctrl.signal })