variant-analysis

95 / 100 · Low risk

Fine to try. Some of what it can do is expected: a coding skill usually runs build and test commands.

By onfire7777/universal-ai-skills-library (GitHub) · coding · 17 stars · scanned at commit 2a76bf4

Find similar vulnerabilities and bugs across codebases using pattern-based analysis. Use when hunting bug variants, building CodeQL/Semgrep queries, analyzing security vulnerabilities, or performing systematic code audits after finding an initial issue.

Works with any agent that supports SKILL.md skills.

What this skill can do

Runs commands on your computer

The author does not mention this. Expected for a coding skill.

Found in 12 places.

skills/variant-analysis/SKILL.md, line 40rg -n "exact_vulnerable_code_here"
skills/variant-analysis/resources/semgrep/java.yaml, line 22- pattern: Runtime.getRuntime().exec($SINK, ...)
skills/variant-analysis/resources/semgrep/java.yaml, line 56- pattern: Runtime.getRuntime().exec(...)

Show 9 more

skills/variant-analysis/resources/semgrep/javascript.yaml, line 22- pattern: child_process.exec($SINK, ...)
skills/variant-analysis/resources/semgrep/javascript.yaml, line 23- pattern: child_process.execSync($SINK, ...)
skills/variant-analysis/resources/semgrep/javascript.yaml, line 24- pattern: child_process.spawn($SINK, ...)
skills/variant-analysis/resources/semgrep/javascript.yaml, line 58- pattern: child_process.exec(...)
skills/variant-analysis/resources/semgrep/python.yaml, line 27- pattern: os.system($SINK)
skills/variant-analysis/resources/semgrep/python.yaml, line 28- pattern: os.popen($SINK)
skills/variant-analysis/resources/semgrep/python.yaml, line 29- pattern: subprocess.call($SINK, ...)
skills/variant-analysis/resources/semgrep/python.yaml, line 30- pattern: subprocess.run($SINK, ...)
skills/variant-analysis/resources/semgrep/python.yaml, line 31- pattern: subprocess.Popen($SINK, ...)

Install

Paste this into your terminal. It downloads exactly the version we scanned, not whatever is newest.

if [ -e ~/.agents/skills/'variant-analysis' ] || [ -L ~/.agents/skills/'variant-analysis' ]; then echo 'A skill folder named variant-analysis already exists — not replacing it' >&2; false; else d=$(mktemp -d) && git clone --quiet --filter=blob:none --no-checkout 'https://github.com/onfire7777/universal-ai-skills-library' "$d" && git -C "$d" checkout --quiet '2a76bf42ce5c860adf8d0f3fcf3f6804109ac65b' -- 'skills/variant-analysis' && mkdir -p ~/.agents/skills && cp -R "$d"/'skills/variant-analysis' ~/.agents/skills/'variant-analysis' && rm -rf "$d"; fi

Codex reads ~/.agents/skills directly. For Claude Code, Cursor, Copilot, Gemini CLI, Antigravity or OpenCode, also link it. For Claude Code: ln -s ~/.agents/skills/'variant-analysis' ~/.claude/skills/'variant-analysis' (other agents: ~/.cursor/skills, ~/.copilot/skills, ~/.gemini/skills, ~/.gemini/config/skills, ~/.config/opencode/skills). Or install through the finder skill, which does both.

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Score history

Date	Version	Score
2026-11-08	`2a76bf4`	100