Compare Deployed Stack with Local CDK Changes

Problem Description

Your team is preparing to deploy changes to the production monitoring stack (lct-monitoring-pr-stack). Before deploying, you need to compare the currently deployed CloudFormation template in the us-east-1 region with your local CDK changes to ensure you understand all differences and can assess deployment risk.

The local project uses make synth to synthesize templates. After comparison, you need to generate a formal comparison report that categorizes the changes and provides a deployment recommendation.

Output Specification

Create the following files:

1. comparison-script.sh - A bash script that:

   • Retrieves the deployed template from AWS
   • Synthesizes the local template
   • Performs structure comparison (top-level keys)
   • Checks resource count differences
   • Identifies added/removed resources
   • Saves all artifacts with timestamps

2. comparison-report.md - A markdown report using this structure:

   # CloudFormation Template Comparison
   
   ## Summary
   - Deployed: <stack-name> (X resources)
   - Local: <stack-name> (Y resources)
   - Status: [✅ Safe to deploy | ⚠️ Review required | ❌ Critical issues]
   
   ## Differences
   [List key differences found]
   
   ## Recommendations
   [Actions required before deployment]
   
   ## Deployment Decision
   [Approve | Reject | Conditional — reasoning]

The script should use placeholder values for stack names and profiles where needed (e.g., <stack-name>, <profile>).