Understand a codebase before looking for bugs in it - what each function assumes, what it guarantees, and what it depends on elsewhere. Use when starting an audit, threat model, or architecture review on unfamiliar code, and before any vulnerability-hunting pass.
Install
npx skills add trailofbits/skills --skill audit-context-buildingnpx skills add trailofbits/skills --skill audit-context-building -a claude-code -gnpx skills add trailofbits/skills --skill audit-context-building -a codex -ggemini skills install https://github.com/trailofbits/skills.git --path plugins/audit-context-building/skills/audit-context-buildinggh skill install trailofbits/skills audit-context-buildinggit clone --depth 1 https://github.com/trailofbits/skills /tmp/trailofbits__skills
mkdir -p ~/.claude/skills ~/.agents/skills
cp -R /tmp/trailofbits__skills/plugins/audit-context-building/skills/audit-context-building ~/.claude/skills/audit-context-building # Claude Code
cp -R /tmp/trailofbits__skills/plugins/audit-context-building/skills/audit-context-building ~/.agents/skills/audit-context-building # Codex, Cursor, Gemini CLI, Copilot, OpenCode