genotoxic agent skill by trailofbits
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.
Source and license
| Publisher | trailofbits |
|---|---|
| Repository | trailofbits/skills |
| License | CC-BY-SA-4.0 |
| Snapshot | 2026-10-22 |
| Last repository commit | 2026-10-15 |
| Instruction size | 1,709 words; 335 lines |
| Bundled files | 6 |
Suede Skill Check: 87/100 · B
Report snapshot · · graded-v2
The rubric totals 100 points; published scores are capped at 99. Security scan: not scanned.
Source revision: 5c99c03fb8a9. Report version 1983443bf8e6. Badge URLs follow the latest listing; save the report to keep this version.
Download report · Request a fresh review
What to review next
- Boundary clause: 0 of 4 points. 4 when the description says when not to use the skill (“Not for …”, “Do not use …”, “Use … instead”).
- Example request: 0 of 3 points. 3 when the description quotes an example request (3–60 characters in quotation marks).
- Bundled scripts: 0 of 2 points. 2 when the skill folder ships a scripts/ folder.
Add declarations and bundled files when they describe the skill’s actual needs. Update the source, then request a fresh review with the changed commit or PR.
| Component | Points earned | Available |
|---|---|---|
| Structural checks | 56 | 56 |
| Description length | 5 | 5 |
| Boundary clause | 0 | 4 |
| Example request | 0 | 3 |
| Instruction depth | 7 | 7 |
| Reference files | 3 | 3 |
| Bundled scripts | 0 | 2 |
| Recent maintenance | 9 | 9 |
| Curated-list citations | 7 | 7 |
| Tool permissions declared | 0 | 2 |
| Compatibility declared | 0 | 2 |
The published score is capped at 99. It measures the published files, documentation and maintenance signals. Security scan: not scanned. This assessment does not include a runtime test or a full installation-dependency review.
Install genotoxic
The skills CLI works with Claude Code, Codex, Cursor and other agents; the other routes copy the folder by hand.
npx skills add https://github.com/trailofbits/skills/tree/main/plugins/trailmark/skills/genotoxictmp="$(mktemp -d)"
git clone --depth 1 https://github.com/trailofbits/skills.git "$tmp/repo"
mkdir -p .claude/skills
cp -R "$tmp/repo/"plugins/trailmark/skills/genotoxic .claude/skills/
rm -rf "$tmp"tmp="$(mktemp -d)"
git clone --depth 1 https://github.com/trailofbits/skills.git "$tmp/repo"
mkdir -p .agents/skills
cp -R "$tmp/repo/"plugins/trailmark/skills/genotoxic .agents/skills/
rm -rf "$tmp"For a user-level install, copy the folder to ~/.claude/skills/ (Claude Code) or ~/.agents/skills/ (Codex). Inside Codex, $skill-installer can also fetch a skill from GitHub. New to skills? Read How to install agent skills in Claude Code, Codex and Cursor.
trailofbits/skills is third-party code. Read SKILL.md and any bundled scripts before you install it.
Two badges for genotoxic
Choose the numeric badge, the letter badge, or both. Each links to this skill’s Suede AI listing; either valid linked badge can qualify for the feature offer.
[](https://suedeai.directory/trailofbits/skills/genotoxic/)
[](https://suedeai.directory/trailofbits/skills/genotoxic/)<a href="https://suedeai.directory/trailofbits/skills/genotoxic/"><img src="https://suedeai.directory/trailofbits/skills/genotoxic/score.svg" alt="Suede Skill Check: 87/100" width="160" height="175"></a>
<a href="https://suedeai.directory/trailofbits/skills/genotoxic/"><img src="https://suedeai.directory/trailofbits/skills/genotoxic/badge.svg" alt="Suede Skill Check: Grade B" width="160" height="175"></a>Suede Certified on the shield refers to this published structural quality check. Security scan: not scanned. Read the methodology.
Limited-time feature offer: Display either quality badge in your repository or skill README, linked to your listing, then request verification. Suede AI checks the rendered README at a recorded commit. Eligible skills scoring 80–99 with a verified badge can receive a featured placement while the offer is open. Request badge verification.
Publishers: read How to get your agent skill found in search and cited by AI assistants.