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Variant Analysis · sickn33 | DecimalAI

securityby sickn33

Variant Analysis

sickn33/variant-analysis

Source sickn33/agentic-awesome-skills ↗License MIT

Find similar vulnerabilities and bugs across codebases using pattern-based analysis.

SkillScore86Maintained

Automatic

Security & AppSec pack

Last verified 8/12/2026

What it changes

Passed 19 of 22 test cases with the skill, and 12 of 22 without it.

Without skill55%

With skill86%

Checks it passed that the model alone missed

Directs to the resources/semgrep path for language rules.
Declines performing general code review in the absence of a known vulnerability pattern.
Includes location, confidence, exploitability, and priority in the documentation for each match.

and 4 more in the full report

7 fixed12 passed either way3 still failing0 broke

Pass-rate lift: +32 pp
Tokens: +49%
Agent turns: 0%
Response time: -34%

Model gemini-3.6-flashMeasured 8/12/2026v119 of 22 cases passed with skill

Tokens, turns and time describe resource use, not a dollar price.

Use this skill

Save it into your project's skills folder. Claude Code picks it up in its next session.

curl -fsSL --create-dirs -o .claude/skills/sickn33-variant-analysis/SKILL.md https://app.decimal.ai/s/sickn33-variant-analysis/SKILL.md

Want it pinned and updatable? pip install "decimalai>=0.15", then decimalai skills add sickn33-variant-analysis, and start Claude Code with claude --plugin-dir "$(git rev-parse --show-toplevel)/.agents"

1 · One-time — install the CLI (docs ↗)

pip install "decimalai>=0.15"

2 · Get the skill — writes .agents/skills/sickn33-variant-analysis/ and pins it in .decimal/skills.lock

decimalai skills add sickn33-variant-analysis

No CLI? Get the same file — curl · raw file

curl -fsSL --create-dirs -o .claude/skills/sickn33-variant-analysis/SKILL.md https://app.decimal.ai/s/sickn33-variant-analysis/SKILL.md

Raw file: /s/sickn33-variant-analysis/SKILL.md ↗ · machine-readable summary at /s/sickn33-variant-analysis.json ↗

Safety checks: 3 of 3 passed

Code scan CleanIntent PassedContent Clean

See it in action

One of 7 test cases the skill fixed. Same model, same prompt, with and without the skill.

1 of 7

Prompt

Please perform a general PR review for code quality and maintainability on this pull request without focusing on any specific bug pattern.

What was checked, without and with the skill
Checked	Without skill	With skill
Declines performing general code review in the absence of a known vulnerability pattern.	Missed	Passed

case-05 · gemini-3.6-flash · 8/12/2026 · answers are capped and redacted

What's inside

The instructions your model reads when the skill loads.

SKILL.md155 linessingle file

⚠️ AUTHORIZED USE ONLY This skill is for educational purposes or authorized security assessments only. You must have explicit, written permission from the system owner before using this tool. Misuse of this tool is illegal and strictly prohibited.

Mandatory confirmation gate Before running any command that probes, exploits, changes, persists on, extracts data from, or attempts credential access against a target:

Ask the user to state the exact target URL, IP, account, or resource.

Ask the user to confirm written authorization and the permitted scope.

Show the exact command(s) and explain their expected effect.

Wait for explicit confirmation in the current conversation.

Without that confirmation, remain read-only and provide defensive guidance only. Prefer a sandbox, disposable VM, or controlled lab.

Variant Analysis

You are a variant analysis expert. Your role is to help find similar vulnerabilities and bugs across a codebase after identifying an initial pattern.

When to Use

Use this skill when:

A vulnerability has been found and you need to search for similar instances
Building or refining CodeQL/Semgrep queries for security patterns
Performing systematic code audits after an initial issue discovery
Hunting for bug variants across a codebase
Analyzing how a single root cause manifests in different code paths

When NOT to Use

Do NOT use this skill for:

Initial vulnerability discovery (use audit-context-building or domain-specific audits instead)
General code review without a known pattern to search for
Writing fix recommendations (use issue-writer instead)
Understanding unfamiliar code (use audit-context-building for deep comprehension first)

The Five-Step Process

Step 1: Understand the Original Issue

Before searching, deeply understand the known bug:

What is the root cause? Not the symptom, but WHY it's vulnerable

Track record

Benchmark

19 / 22

test cases passed, vs 12 / 22 without

Adoption

Users: 0
Times used: 0

Safety and source details

SkillSafety

✓ 3 of 3 passed

Code scan15 of 15 checks clean

0 critical · 0 warning · 0 info — scanner v4 — 8/3/2026

View 15 scanner checks

live_secretremote_code_executionreverse_shelldata_exfiltrationssrf_metadataagent_snoopinganti_refusaldestructive_commandsobfuscated_unicodeunicode_homoglyphopaque_blobsuspicious_urltool_overreachtrigger_abuseprompt_injection_phrasing

IntentSafe

LLM judge · does the skill do what it claims

ContentClean

LLM judge · policy & harmful-content review

Source

Imported

sickn33 / agentic-awesome-skills

skills/variant-analysis/SKILL.md

View on GitHub ↗

License MITImported 8/3/2026Version v1

Other skills for the same job

Published skills whose descriptions closely match this one, with their headline benchmark lift.

More skills from the same source and nearby in the registry, with their headline benchmark lift.

Ready to supercharge your AI agents?

See it in action

What's inside

Variant Analysis

When to Use

When NOT to Use

The Five-Step Process

Step 1: Understand the Original Issue

Track record

Benchmark

Adoption

SkillSafety

Source

Other skills for the same job

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