analyzing-network-packets-with-scapy

Use Scapy to craft, send, sniff, and dissect TCP/UDP/ICMP/DNS packets, analyze pcap files, implement SYN scans, and detect anomalous traffic such as fragmented or malformed packets. Use when performing authorized network reconnaissance, protocol-level forensic analysis, or building traffic anomaly detection during security testing.

Quality

75%

Does it follow best practices?

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Securityby

Low

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tessl review fix ./skills/analyzing-network-packets-with-scapy/SKILL.md

Quality

Content

50%

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

The body is well-structured and avoids padding, but it underutilizes its own bundle: executable code and the API reference are never referenced from SKILL.md, and the workflow lacks validation checkpoints for a batch analysis task.

Suggestions

Replace the Overview's restated description with inline links to the bundle, e.g. 'See references/api-reference.md for function/field details and scripts/agent.py for a runnable analyzer.'

Add a concrete code snippet to the Steps (e.g. a rdpcap + layer-extraction example) or point explicitly to the relevant section of api-reference.md so guidance is copy-paste ready.

Insert validation checkpoints in the workflow (confirm packet count after rdpcap, verify IP-layer records extracted, sanity-check anomaly counts before writing the report).

Dimension	Reasoning	Score
Conciseness	The body is lean and avoids explaining concepts Claude already knows, but the Overview paragraph restates the frontmatter description near-verbatim and the 'When to Use' bullets are templated and generic rather than adding new signal.	2 / 3
Actionability	Steps name real functions (rdpcap(), layer access) but the body contains no executable code blocks; the copy-paste-ready material lives only in references/api-reference.md and scripts/agent.py, which are not surfaced from the body.	2 / 3
Workflow Clarity	The seven steps are sequenced, but this batch analysis workflow has no validation/verification checkpoints (e.g., confirm pcap loaded, sanity-check record counts, verify report schema), capping it at 2 per the rubric.	2 / 3
Progressive Disclosure	Bundle files exist at one level deep (references/api-reference.md, scripts/agent.py), but the SKILL.md body never links to or signals them, so navigation from overview to detail is missing.	2 / 3
	Total	8 / 12 Passed

Description

100%

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 concrete, third-person, and explicitly pairs capabilities with a 'Use when' trigger clause, hitting the top anchor on every dimension. No vague fluff or over-claims are present.

Dimension	Reasoning	Score
Specificity	Lists multiple concrete actions — 'craft, send, sniff, and dissect TCP/UDP/ICMP/DNS packets, analyze pcap files, implement SYN scans, and detect anomalous traffic' — matching the highest anchor.	3 / 3
Completeness	Explicitly answers what it does (the verb list) and when to use it via 'Use when performing authorized network reconnaissance, protocol-level forensic analysis, or building traffic anomaly detection during security testing'.	3 / 3
Trigger Term Quality	Covers natural terms a user would say — 'Scapy', 'pcap files', 'SYN scans', 'network reconnaissance', 'forensic analysis', 'anomaly detection' — with good variation.	3 / 3
Distinctiveness Conflict Risk	Scapy-specific packet analysis is a clear niche with distinct triggers unlikely to overlap with unrelated skills.	3 / 3
	Total	12 / 12 Passed

Validation

93%

Warnings & errors only

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

Criteria	Description	Result
frontmatter_unknown_keys	Unknown frontmatter key(s) found; consider removing or moving to metadata	Warning

	Total	15 / 16 Passed

Repository: mukul975/Anthropic-Cybersecurity-Skills
Path: skills/analyzing-network-packets-with-scapy/SKILL.md
Commit: 88f408a

Reviewed: 2 days ago

Table of Contents

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