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aws-cloudformation

Apache-2.0Updated on Nov 11, 20263,464GitHub stars

An AWS skill for the whole CloudFormation template lifecycle with plain YAML or JSON.

InstallRepository Checked on Nov 12, 2026

What the skill teaches

An AWS skill for the whole CloudFormation template lifecycle with plain YAML or JSON. The agent uses it to write templates with secure defaults, check them locally with cfn-lint or cloudformation-validate, run cfn-guard compliance rules, run CloudFormation's own pre-deployment validation against the account, deploy with Express mode and trace failed stacks back to a root cause. It also explains existing templates from their embedded context and points to the CloudFormation Language Server for editor support. The skill treats template text as untrusted input. The AWS MCP Server is suggested for API steps, but every step also works with the AWS CLI.

Capabilities

  • Author CloudFormation templates with secure defaults
  • Validate templates with cfn-lint, cloudformation-validate and cfn-guard
  • Run account-aware pre-deployment validation
  • Find the root cause of failed stack deployments
  • Explain an existing template from its embedded context

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