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aws-cost-cleanup

Automated cleanup of unused AWS resources to reduce costs

1.02x
Quality

64%

Does it follow best practices?

Impact

88%

1.02x

Average score across 3 eval scenarios

SecuritybySnyk

Passed

No findings from the security scan

Fix and improve this skill with Tessl

tessl review fix ./plugins/AI-Agents-Safe-Coding-Skills-claude/skills/aws-cost-cleanup/SKILL.md

The canonical home for this skill is aws-cost-cleanup in boisenoise/skills-collections

SKILL.md
Quality
Evals
Security

Quality

Content

63%Weight 40%Scale 1-5

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

The body is highly actionable with executable AWS CLI and boto3 code, a sensible phased workflow, and real safety guardrails for a destructive operation. Its main weaknesses are redundancy across the safety/best-practices/risk sections and the absence of any bundle structure — six full scripts are inlined where separate script files would ease navigation and token cost.

Suggestions

Move the cleanup scripts, savings calculator, Lambda function, and lifecycle policy template into a scripts/ or references/ bundle and reference them from SKILL.md to cut body length and improve progressive disclosure.

Consolidate 'Safety Checklist', 'Best Practices', and 'Risk Mitigation' into one section — dry-run first, snapshot before delete, notify owners, and document actions are each repeated 2-3 times.

Add concrete commands and an error-recovery loop (e.g., what to do when a delete fails or a resource turns out to be in use) to the Cleanup Workflow phases.

DimensionReasoningScore

Conciseness

The code blocks themselves are lean and assume Claude's competence, but safety guidance is duplicated across 'Safety Checklist', 'Cleanup Workflow', 'Best Practices', and 'Risk Mitigation' (dry-run first, snapshot before delete, notify owners, document actions each appear 2-3 times). This is 'mostly efficient but includes some unnecessary explanation or could be tightened'; a 2 would require heavier padding or explanations of concepts Claude already knows, which are largely absent.

3 / 5

Actionability

Concrete, mostly executable guidance throughout: aws CLI scripts for volumes, snapshots, and Elastic IPs; a boto3 savings calculator; an S3 lifecycle policy JSON; a deployable Lambda handler; and a CloudWatch alarm command. Minor gaps keep it below 5: the Organizations example assumes profile names like 'account-123456789012', 'my-bucket' is a placeholder, and the destructive delete commands are commented out (intentional dry-run, but not fully copy-paste ready for execution).

4 / 5

Workflow Clarity

The 'Cleanup Workflow' gives a clear four-phase sequence (Discovery read-only, Validation, Execution dry-run-first, Verification) with an accompanying safety checklist, so the destructive-operation cap at 3 does not apply since validation and verification steps are present. It falls short of a 5 because the phases are high-level bullets without concrete commands and lack explicit error-recovery feedback loops (fix-and-retry).

4 / 5

Progressive Disclosure

Section headers are clear and consistent, but the body inlines ~180 lines of full scripts (six bash/python blocks, a Lambda function, a lifecycle policy) with no references/, scripts/, or assets/ bundle at all — content that clearly belongs in separate script files sits inside SKILL.md. This matches 'Some structure but could be better organized; content that should be separate is inline'; a 2 would require missing or buried structure, which is not the case.

3 / 5

Total

14

/

20

Passed

Description

48%Weight 40%Scale 1-5

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

The description communicates a clear niche (AWS unused-resource cleanup for cost reduction) but is thin: it names only one generic action, omits any 'Use when...' trigger clause, and misses natural synonyms users would say. It sits just below the midpoint of the rubric scale.

Suggestions

Enumerate concrete cleanup actions, e.g. "Deletes unattached EBS volumes, expired snapshots, and unused Elastic IPs; applies S3 lifecycle policies".

Add an explicit trigger clause, e.g. "Use when the user wants to reduce AWS costs, clean up idle resources, or lower their AWS bill".

Include natural user phrasings and synonyms such as "save money", "AWS bill", "waste", or specific services (EBS, EC2, S3) to improve trigger matching.

DimensionReasoningScore

Specificity

The description "Automated cleanup of unused AWS resources to reduce costs" names the domain (unused AWS resources) but offers only the single generic action "cleanup" with no concrete operations (e.g., delete unattached EBS volumes, release Elastic IPs, expire old snapshots). This matches the anchor 'Names the domain but actions are minimal or generic'; a 3 would require naming 1-2 concrete actions, which is absent.

2 / 5

Completeness

The 'what' is stated (automated cleanup of unused AWS resources to reduce costs), but there is no 'Use when...' clause or equivalent trigger guidance, capping completeness at 3 per the rubric guideline. The 'when' is only weakly implied by 'to reduce costs', not explicitly stated as it would need to be for a 4.

3 / 5

Trigger Term Quality

Relevant keywords like "AWS", "unused resources", "cleanup", and "reduce costs" are present, but common user phrasings such as "save money", "AWS bill", "waste", or specific service names (EBS, EC2, snapshots) are missing. This fits 'Some relevant keywords but missing common variations or synonyms'; a 4 would need broader natural-term coverage.

3 / 5

Distinctiveness Conflict Risk

The AWS cost-optimization/cleanup niche is fairly distinct with a clear scope (unused AWS resources), so it is mostly distinguishable from unrelated skills, with only minor overlap risk against closely related AWS administration or cost-optimization skills. It lacks the sharper, service-specific triggers that would justify a 5.

4 / 5

Total

12

/

20

Passed

Validation

93%

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

Validation — 15 / 16 Passed

Validation for skill structure

CriteriaDescriptionResult

frontmatter_unknown_keys

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

Warning

Total

15

/

16

Passed

Repository

administrakt0r/AI-Agents-Safe-Coding-Skills

Path

plugins/AI-Agents-Safe-Coding-Skills-claude/skills/aws-cost-cleanup/SKILL.md

Reviewed

Table of Contents

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