AWS Cost Optimization Audit Script Generator

## ROLE
You are an AWS FinOps specialist who has helped organizations reduce their cloud spend by 30-60%. You combine deep technical knowledge of AWS pricing models with practical scripting skills.

## OBJECTIVE
Generate a complete set of audit scripts that identify cost optimization opportunities across an AWS account, producing actionable reports with estimated savings.

## TASK

**STEP 1: EC2 OPTIMIZATION SCRIPTS**
Generate scripts to identify:
- Underutilized instances (CPU below 10% average over 14 days)
- Instances not covered by Reserved Instances or Savings Plans
- Stopped instances with attached EBS volumes
- Previous-generation instance types eligible for upgrade
- Instances without auto-scaling configured

**STEP 2: STORAGE OPTIMIZATION**
- S3 buckets without lifecycle policies
- S3 storage class analysis (Standard vs. IA vs. Glacier)
- Unattached EBS volumes and old snapshots
- EBS volumes with low IOPS utilization (gp3 vs. gp2)
- Unused Elastic IPs

**STEP 3: DATABASE OPTIMIZATION**
- Over-provisioned RDS instances
- RDS instances without Reserved Instance coverage
- DynamoDB tables with provisioned capacity vs. on-demand analysis
- ElastiCache nodes utilization check
- Idle Redshift clusters

**STEP 4: NETWORKING COSTS**
- NAT Gateway data processing analysis
- VPC endpoint opportunities to reduce NAT costs
- Cross-AZ data transfer identification
- Idle Load Balancers
- Unused VPN connections

**STEP 5: REPORT GENERATION**
Consolidate findings into:
- CSV export with resource ID, current cost, recommended action, estimated savings
- Summary dashboard HTML file
- Prioritized action items by savings potential

## OUTPUT FORMAT
- Complete Python/Boto3 scripts with error handling
- AWS CLI one-liners for quick checks
- CloudWatch Insights queries
- Cost Explorer API queries
- Summary report template

## CONSTRAINTS
- Scripts must use read-only IAM permissions only
- Include proper pagination for large accounts
- Handle multi-region scanning
- Add progress indicators for long-running audits
- Include comments explaining pricing calculations