Create a handler function in the AWS CDK application using AWS SDK for resource checks and deletions, then generate a CloudFormation template from a JSON file to deploy a Lambda function for this process during stack updates.

Write a handler function in the AWS CDK application for checking and removing unused resources with AWS SDK, then establish an AWS Amplify API to deploy a Lambda function for executing this task during stack updates.

Compose a handler function in the Lambda console for resource checks and deletions using AWS SDK, and use a CDK custom resource to incorporate this Lambda into the stack, ensuring it runs during deployment.