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aws-cloudformation-s3

Provides AWS CloudFormation patterns for Amazon S3. Use when creating S3 buckets, policies, versioning, lifecycle rules, and implementing template structure with Parameters, Outputs, Mappings, Conditions, and cross-stack references.

64

Quality

80%

Does it follow best practices?

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SecuritybySnyk

Passed

No findings from the security scan

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tessl review fix ./plugins/developer-kit-aws/skills/aws-cloudformation/aws-cloudformation-s3/SKILL.md

The canonical home for this skill is giuseppe-trisciuoglio/developer-kit

SKILL.md
Quality
Evals
Security

Quality

Content

61%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.

Highly actionable with extensive executable CloudFormation examples and commands, but the body is verbose and inlines reference-grade material that should live in the bundle files. The core creation workflow also lacks the validation checkpoints expected for destructive IaC operations.

Suggestions

Move the long drift-detection, change-set, and termination-protection scripts plus the redundant bucket-config examples into references/reference.md or references/examples.md, keeping SKILL.md a concise overview with one canonical example per pattern.

Add explicit validation checkpoints to the Instructions workflow (e.g., 'validate template with cfn-lint', 'preview with a change set', 'confirm no REPLACEMENT on critical resources before executing') since stack updates can be destructive.

Consolidate the repeated S3 bucket snippets (Quick Start, Complete Example, and per-feature examples) into a single canonical production template plus brief inline variants to cut token cost.

DimensionReasoningScore

Conciseness

The body is noticeably verbose — it inlines many repeated S3 bucket examples and long shell/python scripts (drift detection, change sets) that belong in reference files, plus some basic template-structure explanation Claude already knows.

2 / 5

Actionability

Provides numerous concrete, copy-paste-ready CloudFormation YAML templates and AWS CLI/bash/python commands covering the common S3 patterns and deployment workflows.

5 / 5

Workflow Clarity

The 8-step Instructions list is high-level with no validation checkpoints, and because CloudFormation updates/deletions are destructive, the missing verification steps cap this at 3 even though a Change Sets section with feedback exists later.

3 / 5

Progressive Disclosure

References to references/examples.md and references/reference.md (both real files) are clearly signaled and one level deep, but a large amount of example/script detail is inlined in SKILL.md rather than pushed into the reference files.

4 / 5

Total

14

/

20

Passed

Description

92%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.

A strong, specific description that clearly answers both what the skill does and when to use it with concrete CloudFormation/S3 trigger terms. Minor room for broader synonym coverage, but distinctiveness and completeness are excellent.

DimensionReasoningScore

Specificity

Names the CloudFormation/S3 domain and lists multiple concrete capabilities — buckets, policies, versioning, lifecycle rules, Parameters, Outputs, Mappings, Conditions, and cross-stack references — giving comprehensive coverage.

5 / 5

Completeness

Explicitly states both what ('Provides AWS CloudFormation patterns for Amazon S3') and when ('Use when creating S3 buckets, policies, versioning, lifecycle rules...') with concrete trigger phrases.

5 / 5

Trigger Term Quality

Includes natural user terms like 'S3 buckets', 'policies', 'versioning', and 'lifecycle rules', but stops short of exhaustive synonym/extension coverage that would warrant a 5.

4 / 5

Distinctiveness Conflict Risk

Targets a clear niche (CloudFormation for S3) with distinct triggers, making overlap with unrelated skills unlikely.

5 / 5

Total

19

/

20

Passed

Validation

87%

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

Validation — 14 / 16 Passed

Validation for skill structure

CriteriaDescriptionResult

skill_md_line_count

SKILL.md is long (1435 lines); consider splitting into references/ and linking

Warning

allowed_tools_field

'allowed-tools' contains unusual tool name(s)

Warning

Total

14

/

16

Passed

Repository

fernandezbaptiste/developer-kit

Path

plugins/developer-kit-aws/skills/aws-cloudformation/aws-cloudformation-s3/SKILL.md

Reviewed

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