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Validate CloudFormation templates before deploy with cfn-lint

Catch CloudFormation schema, region, and intrinsic-function mistakes before a stack update fails in review or deployment.

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COPY SKILL INSTRUCTIONS (OPTIONAL)
npx skills add agentskillexchange/skills --skill validate-cloudformation-templates-before-deploy-with-cfn-lint Copy
Uses the third-party skills CLI, not an ASE-owned installer. Check your agent’s compatibility. This copies instructions; complete the upstream tool setup below separately.
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At a glance
Tools required
Python or cfn-lint binary, CloudFormation templates
Install & setup
Install with pip install cfn-lint or use the project binaries, then run cfn-lint on the template files before review, CI, or deployment.
Author
AWS CloudFormation
Publisher
Organization
Last updated
Apr 15, 2026
Quick brief

Use cfn-lint when an agent needs to review or gate AWS CloudFormation changes before deployment. It can validate template structure, catch invalid properties, check region-specific resource rules, and surface intrinsic-function mistakes before they become failed stack operations. The scope is tightly bounded to pre-deploy CloudFormation validation, which keeps this from collapsing into a general AWS product listing.