Environment Validation Pattern

This is a reference pattern. Learn from the approach, adapt to your context — don't copy verbatim.

Problem: Scripts fail halfway through due to missing environment variables, wasting time and leaving systems in inconsistent states.

Solution: Validate all required environment variables at the start, before any operations begin.

Pattern

Validate Early: Check all required configuration before starting business logic.

// ✅ Preferred: Validate at entry point
function validateEnvironment() {
  const required = ['AWS_REGION', 'PROJECT_ID', 'ENVIRONMENT'];
  const missing = required.filter(key => !process.env[key]);