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path-traversal

Hunt directory traversal and archive traversal (ZipSlip/TarSlip) from user input to filesystem operations.

63

Quality

75%

Does it follow best practices?

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Adds up to 20 points to the overall score

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SecuritybySnyk

Critical

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tessl review fix ./packages/decepticon/decepticon/skills/standard/analyst/path-traversal/SKILL.md
SKILL.md
Quality
Evals
Security

Quality

Content

86%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 content is a tight, well-structured offensive-testing playbook with concrete payloads and a validation step. Its main gap is the absence of a complete executable delivery example and an explicit feedback loop.

Suggestions

Add one concrete delivery example showing how a payload reaches a sink (e.g., a curl command or a Python snippet crafting a malicious archive entry).

Make the feedback loop explicit: if a payload class is blocked by canonicalization or confinement, note which alternative class to try next.

Specify how to run positive and negative controls concretely (e.g., an allowed-path request that succeeds vs. a traversal request that should be rejected).

DimensionReasoningScore

Conciseness

The body is lean and efficient with no padding or explanation of concepts Claude already knows; every line (sinks, payloads, controls, validation) earns its place.

5 / 5

Actionability

It gives concrete, copy-paste-ready payloads ('../../../../etc/passwd', '%2e%2e%2f', '..\\..\\windows\\win.ini') and named sinks, but lacks a full executable delivery example (e.g., a curl command or archive-crafting script) tying the pieces together.

4 / 5

Workflow Clarity

The four sections form a clear sequence (find sinks → probe payloads → verify controls → validate) with an explicit validation step and control checkpoints, though there is no explicit error-recovery feedback loop between payload probing and control verification.

4 / 5

Progressive Disclosure

The skill is under 50 lines with no external bundle files and is well-organized into clearly labeled sections, satisfying the simple-skill exception for progressive disclosure.

5 / 5

Total

18

/

20

Passed

Description

65%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 is specific and highly distinct, but it states only the 'what' without an explicit 'when to use' clause, which limits its completeness. Trigger-term coverage is strong within the description itself.

Suggestions

Add a 'Use when...' clause to the description, e.g. 'Use when auditing file download endpoints, archive extraction, or any user input that reaches filesystem operations.'

Include the most common phrasing 'path traversal' directly in the description rather than only in metadata.when_to_use.

Expand the action verb beyond 'Hunt' to signal the full scope (e.g., find, confirm, and report traversal sinks).

DimensionReasoningScore

Specificity

The description names the domain and one concrete action ('Hunt directory traversal and archive traversal (ZipSlip/TarSlip) from user input to filesystem operations'), but offers only a single verb and does not comprehensively list actions like verify, exploit, or report.

3 / 5

Completeness

The 'what' is clearly stated (hunt traversal from user input to filesystem operations) but there is no 'Use when...' clause or explicit trigger guidance in the description field, which caps completeness at 3 per the rubric guidelines.

3 / 5

Trigger Term Quality

It includes several natural security terms a user would say ('directory traversal', 'archive traversal', 'ZipSlip', 'TarSlip', 'filesystem'), though the most common phrasing 'path traversal' and 'CWE-22' appear only in metadata rather than the description.

4 / 5

Distinctiveness Conflict Risk

It targets a clearly defined niche (path/archive traversal vulnerabilities) with distinct triggers (ZipSlip, TarSlip) and minimal overlap risk with other skills.

5 / 5

Total

15

/

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.

Validation15 / 16 Passed

Validation for skill structure

CriteriaDescriptionResult

metadata_version

'metadata.version' is missing

Warning

Total

15

/

16

Passed

Repository
PurpleAILAB/Decepticon
Reviewed

Table of Contents

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