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Security & Compliance
Security & Hardening skill
Hardens code against vulnerabilities when it handles user input, authentication, data storage or external integrations, and audits input handlers and login flows.
Why it matters
Security review at the moment code is written is cheaper than review afterwards. Part of Addy Osmani's agent skills, with 117,051 stars.
How to install Security & Hardening
- With the skills CLI. One command copies the skill into your project:
npx skills add addyosmani/agent-skills --skill security-and-hardening - In Claude Code, by hand. Copy the
security-and-hardeningfolder from the repository into.claude/skills/in your project, or into~/.claude/skills/to use it everywhere. - In AGNT. Download AGNT free, then add the skill folder from Skills → Import. It runs with the model you choose, next to your agents, workflows and memory.
Source and maintenance
| Repository | addyosmani/agent-skills |
| Skill folder | security-and-hardening |
| GitHub stars (13 November 2026) | 117,051 |
| Last commit | 1 Nov 2026 |
| Category | Security & Compliance |
| Ranked | #53 in The 100 Best AI Agent Skills in 2027 |
Checked against GitHub on 13 November 2026.
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