pantheon-ai/cfn-behavior-validator
Creates test stacks, analyzes CloudFormation events, and compares actual vs documented update behavior to validate whether resource property changes trigger replacement or in-place updates. Use when: a user wants to test if a CFN property change causes resource replacement; when investigating stack update behavior or "Update requires" documentation accuracy; when validating whether a workaround (e.g. hash-based logical IDs) is actually necessary; when questioning UpdateRequiresReplacement behavior for immutable properties; when empirical evidence is needed before an architectural decision involving CDK or CloudFormation stack updates.
77
97%
Does it follow best practices?
Run evals on this skill
Adds up to 20 points to the overall score
View guide
Low
Low-risk findings worth noting
W011: Third-party content exposure detected (indirect prompt injection risk).
What this means
The skill exposes the agent to untrusted, user-generated content from public third-party sources, creating a risk of indirect prompt injection. This includes browsing arbitrary URLs, reading social media posts or forum comments, and analyzing content from unknown websites.
Why it was flagged
Outsider free text is ingested via the “Research” step where the workflow instructs the agent to search and use community-authored sources (e.g., GitHub issues/PRs, Stack Overflow, AWS re:Post) and then “document immediately,” which typically involves fetching and reading arbitrary outsider-written text at runtime.
Where we found it
github.com
domain · 1 site
The scanner flags GitHub as a source the plugin fetches at runtime, but line 17 is a manual research instruction for the user, not an automated fetch by the plugin.
SKILL.md
17
Search GitHub (AWS CDK repo), Stack Overflow, and AWS re:Post for community reports of discrepancies.
stackoverflow.com
domain · 1 site
The scanner flags Stack Overflow as a source the plugin fetches at runtime, but line 17 is a manual research instruction for the user, not an automated fetch by the plugin.
SKILL.md
17
Search GitHub (AWS CDK repo), Stack Overflow, and AWS re:Post for community reports of discrepancies.
repost.aws
domain · 1 site
The scanner flags AWS re:Post as a source the plugin fetches at runtime, but line 17 is a manual research instruction for the user, not an automated fetch by the plugin.
SKILL.md
17
Search GitHub (AWS CDK repo), Stack Overflow, and AWS re:Post for community reports of discrepancies.
docs.aws.amazon.com
domain · 3 sites
The scanner may flag AWS documentation URLs as runtime fetches, but these are reference links in the documentation, not content the plugin fetches and acts on at runtime.
SKILL.md
115
- [CloudFormation Update Behaviors](https://docs.aws.amazon.[REDACTED].html)
SKILL.md
116
- [CloudFormation Resource Reference](https://docs.aws.amazon.[REDACTED].html)
SKILL.md
117
- [AWS CDK Best Practices](https://docs.aws.amazon.com/cdk/v2/guide/best-practices.html)
- Audited
- Security analysis