The body is lean and assumes Claude's competence — it does not explain what CloudFormation or CDK is, and every section (workflow steps, validation gates, anti-patterns) earns its tokens with actionable guidance.

Provides executable commands such as `cdk deploy --require-approval never` and a complete `aws cloudformation describe-stack-events` query with a concrete JMESPath filter; the CDK snippet is intentionally parameterized rather than pseudocode.

A clear four-step sequence (Research → Design → Execute → Document & Decide) with explicit validation gates — "If initial deployment fails → stop and fix", "If behavior is ambiguous → repeat" — providing the feedback loops the rubric requires for destructive stack operations.

Sections are well-organized and references are clearly signaled in a table, but the referenced bundle files (`./scripts/watch-cfn-events.sh`, `./scripts/compare-resources.sh`, and `EXAMPLES.md`) do not exist in the skill directory, so the one-level-deep navigation is broken.

Lists multiple concrete actions — "Creates test stacks, analyzes CloudFormation events, and compares actual vs documented update behavior" — matching the rubric's anchor for multiple specific concrete actions.

Explicitly answers both what (creates test stacks, analyzes events, compares actual vs documented behavior) and when via a clear "Use when:" clause with several enumerated triggers.

Covers natural phrasings a user would actually say: "test if a CFN property change causes resource replacement", "stack update behavior", "Update requires documentation accuracy", and "workaround ... is actually necessary".

Occupies a clear niche — empirical validation of CloudFormation update behavior — with triggers specific enough to avoid firing for generic CDK or document skills.