# Variant Analysis > 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. Use when this capability is needed. - Skill: `tomevault-io/variant-analysis` (Agent Skill, multi-file: 2 files) - Install (CLI): `npx skillmds@latest add tomevault-io/variant-analysis` - Raw SKILL.md: https://api.skillmd.com/api/skills/tomevault-io/variant-analysis/raw - Safety review: pending (external: skill-scanner PASS, skillspector PASS) - Works with: Claude Code, Claude.ai, OpenAI Codex - Category: Security - Author: tomevault-io (https://skillmd.com/u/tomevault-io) - Updated: 2026-09-17 - Page: https://skillmd.com/skills/tomevault-io/variant-analysis --- # Variant Analysis Skill **Trit**: -1 (MINUS) **Category**: variant-analysis **Author**: Trail of Bits **Source**: trailofbits/skills **License**: AGPL-3.0 ## Description 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. ## When to Use This is a Trail of Bits security skill. Refer to the original repository for detailed usage guidelines and examples. See: https://github.com/trailofbits/skills ## Related Skills - audit-context-building - codeql - semgrep - variant-analysis --- > Converted and distributed by [TomeVault](https://tomevault.io/claim/plurigrid) — claim your Tome and manage your conversions.