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genotoxic
65 / 100 · Review before installing
Check before installing. Some of what it can do is expected: a coding skill usually runs build and test commands.
By trailofbits/skills (GitHub) · coding · 8,130 stars · scanned at commit e4dd0bb
Graph-informed mutation testing triage. Parses codebases with Trailmark, runs mutation testing and necessist, then uses survived mutants, unnecessary test statements, and call graph data to identify false positives, missing test coverage, and fuzzing targets. Use when triaging survived mutants, analyzing mutation testing results, identifying test gaps, finding fuzzing targets from weak tests, running mutation frameworks (including circomvent and cairo-mutants), or using necessist.
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 4 places.
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Downloads and installs other software
The author does not mention this.
Found in 15 places.
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- plugins/trailmark/skills/genotoxic/references/mutation-frameworks.md, line 176
cargo install cargo-mutants - plugins/trailmark/skills/genotoxic/references/mutation-frameworks.md, line 212
brew tap go-gremlins/tap && brew install gremlins - plugins/trailmark/skills/genotoxic/references/mutation-frameworks.md, line 215
go install github.com/go-gremlins/gremlins/cmd/gremlins@latest - plugins/trailmark/skills/genotoxic/references/mutation-frameworks.md, line 232
go install github.com/zimmski/go-mutesting/cmd/go-mutesting@latest - plugins/trailmark/skills/genotoxic/references/mutation-frameworks.md, line 307
`brew install llvm@<version>`. On Ubuntu, use - plugins/trailmark/skills/genotoxic/references/mutation-frameworks.md, line 308
`sudo apt-get install clang-<version>`. - plugins/trailmark/skills/genotoxic/references/mutation-frameworks.md, line 337
brew install llvm@18 # or llvm@19, llvm@20 - plugins/trailmark/skills/genotoxic/references/mutation-frameworks.md, line 357
Clang. Using `brew install llvm@18` with `Mull-19-*` will not work. - plugins/trailmark/skills/genotoxic/references/mutation-frameworks.md, line 371
sudo apt-get install mull-19 # match your LLVM version - plugins/trailmark/skills/genotoxic/references/mutation-frameworks.md, line 386
sudo dnf install mull-20 # match your LLVM version - plugins/trailmark/skills/genotoxic/references/mutation-frameworks.md, line 776
slither-mutate . --test-cmd "npx hardhat test" --compile-force-framework hardhat - plugins/trailmark/skills/genotoxic/references/mutation-frameworks.md, line 956
cargo install necessist
Changes files outside its own folder
The author does not mention this.
Found in 4 places.
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Connects to the internet
The author does not mention this.
Found in 2 places.
Safer alternatives
Low-risk skills in the same category (coding) that look related. Check that one does what you need.
Install
Paste this into your terminal. It downloads exactly the version we scanned, not whatever is newest.
if [ -e ~/.agents/skills/'genotoxic' ] || [ -L ~/.agents/skills/'genotoxic' ]; then echo 'A skill folder named genotoxic already exists — not replacing it' >&2; false; else d=$(mktemp -d) && git clone --quiet --filter=blob:none --no-checkout 'https://github.com/trailofbits/skills' "$d" && git -C "$d" checkout --quiet 'e4dd0bb5b15535f7c5a0834187dffba6ac37e4ff' -- 'plugins/trailmark/skills/genotoxic' && mkdir -p ~/.agents/skills && cp -R "$d"/'plugins/trailmark/skills/genotoxic' ~/.agents/skills/'genotoxic' && 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/'genotoxic' ~/.claude/skills/'genotoxic' (other agents: ~/.cursor/skills, ~/.copilot/skills, ~/.gemini/skills, ~/.gemini/config/skills, ~/.config/opencode/skills). Or install through the finder skill, which does both.
Badge for your README
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[](https://zalavijaysinh.github.io/skilltrust/repos/trailofbits/skills/)
Score history
| Date | Version | Score |
|---|
| 2026-11-08 | e4dd0bb | 65 |
| 2026-11-07 | e4dd0bb | 65 |