Define, review, or update SECURITY.md guidance for a repository or component. Use when the user wants to clarify what Codex Security should review, what is out of scope, which security properties must hold, or whether existing guidance still matches the code.
Install
npx skills add openai/plugins --skill define-security-policynpx skills add openai/plugins --skill define-security-policy -a claude-code -gnpx skills add openai/plugins --skill define-security-policy -a codex -ggemini skills install https://github.com/openai/plugins.git --path plugins/codex-security/skills/define-security-policygh skill install openai/plugins define-security-policygit clone --depth 1 https://github.com/openai/plugins /tmp/openai__plugins
mkdir -p ~/.claude/skills ~/.agents/skills
cp -R /tmp/openai__plugins/plugins/codex-security/skills/define-security-policy ~/.claude/skills/define-security-policy # Claude Code
cp -R /tmp/openai__plugins/plugins/codex-security/skills/define-security-policy ~/.agents/skills/define-security-policy # Codex, Cursor, Gemini CLI, Copilot, OpenCode