Application security patterns - authentication, secrets management, input validation, OWASP Top 10. Use when: auth, JWT, secrets, API keys, SQL injection, XSS, CSRF, RLS, security audit, pen testing basics.
Install
npx skills add ScientiaCapital/skills --skill security-skillnpx skills add ScientiaCapital/skills --skill security-skill -a claude-code -gnpx skills add ScientiaCapital/skills --skill security-skill -a codex -ggemini skills install https://github.com/ScientiaCapital/skills.git --path active/security-skillgh skill install ScientiaCapital/skills security-skillgit clone --depth 1 https://github.com/ScientiaCapital/skills /tmp/ScientiaCapital__skills
mkdir -p ~/.claude/skills ~/.agents/skills
cp -R /tmp/ScientiaCapital__skills/active/security-skill ~/.claude/skills/security-skill # Claude Code
cp -R /tmp/ScientiaCapital__skills/active/security-skill ~/.agents/skills/security-skill # Codex, Cursor, Gemini CLI, Copilot, OpenCode