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auditing-cloud-with-cis-benchmarks

This skill details how to conduct cloud security audits using Center for Internet Security benchmarks for AWS, Azure, and GCP. It covers interpreting CIS Foundations Benchmark controls, running automated assessments with tools like Prowler and ScoutSuite, remediating failed controls, and maintaining continuous compliance monitoring against CIS v5 for AWS, v4 for Azure, and v4 for GCP.

62

Quality

73%

Does it follow best practices?

Impact

No eval scenarios have been run

SecuritybySnyk

Passed

No known issues

Optimize this skill with Tessl

npx tessl skill review --optimize ./skills/auditing-cloud-with-cis-benchmarks/SKILL.md
SKILL.md
Quality
Evals
Security

Quality

Content

64%

Reviews the quality of instructions and guidance provided to agents. Good implementation is clear, handles edge cases, and produces reliable results.

This is a solid, actionable skill with executable commands covering the full CIS benchmark audit lifecycle across AWS, Azure, and GCP. Its main weaknesses are the lack of validation/feedback loops after remediation steps (critical for batch operations on production infrastructure) and some verbosity in definitional sections that Claude doesn't need. The monolithic structure would benefit from splitting detailed remediation and scenario content into referenced files.

Suggestions

Add an explicit validation step after Step 4 remediation: re-run Prowler on remediated controls and compare before/after scores before proceeding to Step 5

Add a dry-run or pre-check before batch remediation commands (e.g., the S3 encryption loop) to list affected resources before applying changes

Remove or significantly trim the Key Concepts table — Claude already knows what terms like 'Compliance Score' and 'Automated Assessment' mean

Consider splitting the Common Scenarios section and detailed remediation commands into separate referenced files to improve progressive disclosure

DimensionReasoningScore

Conciseness

The skill is reasonably well-structured but includes unnecessary content like the Key Concepts table defining terms Claude already knows (e.g., what a CIS Benchmark is, what 'Automated Assessment' means). The Tools & Systems section also explains obvious things. The ASCII table for benchmark coverage areas adds bulk without much actionable value. However, the code examples and workflow steps are generally lean.

2 / 3

Actionability

The skill provides fully executable bash commands for Prowler scans, jq parsing of results, AWS CLI remediation commands, and continuous monitoring setup. Commands are copy-paste ready with specific flags, output formats, and real CIS control IDs referenced. The remediation examples cover concrete controls (1.4, 2.1.1, 3.1, 4.x) with actual CLI syntax.

3 / 3

Workflow Clarity

The 5-step workflow is clearly sequenced and logically ordered from benchmark selection through continuous monitoring. However, there are no explicit validation checkpoints after remediation steps — Step 4 applies fixes but never instructs to re-run the assessment to verify fixes worked. For destructive/batch operations like the S3 encryption loop, there's no pre-check or dry-run step. Missing feedback loops (remediate -> validate -> confirm) cap this at 2.

2 / 3

Progressive Disclosure

The content is a monolithic single file with no bundle files or references to supporting documents. At ~180 lines with detailed remediation commands, output format templates, and a full scenario walkthrough, some content (like the Common Scenarios section, the Key Concepts table, or detailed remediation runbooks) could be split into separate referenced files. The 'Do not use' section references other skills but the main content is all inline.

2 / 3

Total

9

/

12

Passed

Description

82%

Based on the skill's description, can an agent find and select it at the right time? Clear, specific descriptions lead to better discovery.

This is a strong description with excellent specificity, naming concrete tools, cloud providers, benchmark versions, and actions. Its main weakness is the absence of an explicit 'Use when...' clause, which would help Claude know exactly when to select this skill. The domain-specific terminology provides natural trigger terms and clear distinctiveness.

Suggestions

Add an explicit 'Use when...' clause, e.g., 'Use when the user asks about CIS benchmarks, cloud security audits, compliance checks for AWS/Azure/GCP, or mentions tools like Prowler or ScoutSuite.'

DimensionReasoningScore

Specificity

Lists multiple specific concrete actions: interpreting CIS Foundations Benchmark controls, running automated assessments with named tools (Prowler, ScoutSuite), remediating failed controls, and maintaining continuous compliance monitoring. Also specifies exact benchmark versions.

3 / 3

Completeness

Clearly answers 'what does this do' with detailed capabilities, but lacks an explicit 'Use when...' clause or equivalent trigger guidance. The when is only implied through the description of capabilities, which per the rubric caps completeness at 2.

2 / 3

Trigger Term Quality

Includes strong natural keywords users would say: 'cloud security audit', 'CIS benchmarks', 'AWS', 'Azure', 'GCP', 'Prowler', 'ScoutSuite', 'compliance monitoring', 'CIS Foundations Benchmark'. These cover the terms a user working in cloud security compliance would naturally use.

3 / 3

Distinctiveness Conflict Risk

Highly distinctive with a clear niche: CIS benchmark-based cloud security audits across specific cloud providers with named tools and specific benchmark versions. Unlikely to conflict with other skills due to the specificity of the domain.

3 / 3

Total

11

/

12

Passed

Validation

90%

Checks the skill against the spec for correct structure and formatting. All validation checks must pass before discovery and implementation can be scored.

Validation10 / 11 Passed

Validation for skill structure

CriteriaDescriptionResult

frontmatter_unknown_keys

Unknown frontmatter key(s) found; consider removing or moving to metadata

Warning

Total

10

/

11

Passed

Repository
mukul975/Anthropic-Cybersecurity-Skills
Reviewed

Table of Contents

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