aws-cloudformation — Skills

What it does

S3 buckets: PublicAccessBlockConfiguration (all four true), BucketEncryption, VersioningConfiguration

Stateful resources: DeletionPolicy: Retain and UpdateReplacePolicy: Retain

Avoid hardcoded physical resource names — use !Sub "${AWS::StackName}-..." for uniqueness

Never put secrets in plain String parameters

Activate with --deployment-config '{"mode": "EXPRESS"}' on create-stack, update-stack, or delete-stack

CDK: cdk deploy --express

Rollback is disabled by default; re-enable with "disableRollback": false

aws cloudformation

Source

Repository: https://github.com/aws/agent-toolkit-for-aws

aws-cloudformation FAQ

What does the aws-cloudformation skill do?

Author, validate, and troubleshoot AWS CloudFormation templates. Covers template authoring with secure defaults, pre-deployment validation (cfn-lint, cfn-guard, change sets), and root-cause diagnosis of failed stacks using CloudFormation events and CloudTrail correlation. S3 buckets: PublicAccessBlockConfiguration (all four true), BucketEncryption, VersioningConfiguration Stateful resources: DeletionPolicy: Retain and UpdateReplacePolicy: Retain

What does aws-cloudformation require?

NOT for production workflows that require resources to serve traffic immediately after stack completion Configuration keys: CREATE_FAILED, ROLLBACK_COMPLETE, UPDATE_ROLLBACK_FAILED.

How do I install aws-cloudformation?

Run: npx -y skills add https://github.com/aws/agent-toolkit-for-aws --skill aws-cloudformation --agent claude-code — the source lives at github.com/aws/agent-toolkit-for-aws.

Maintain aws-cloudformation?

Let people know it's listed here — add the badge (live metrics, light/dark aware) or a plain link to your README or docs.

[aws-cloudformation on getagentictools](https://getagentictools.com/skills/aws-agent-toolkit-for-aws-aws-cloudformation?ref=badge)

npx agentictools info skills/aws-agent-toolkit-for-aws-aws-cloudformation

The second line is the CLI lookup for this page — handy in READMEs and docs.