Hardening your code means protecting it from hackers and bugs. This skill helps you keep user data safe. It covers passwords, input checks, and safe storage.
Think like an attacker before you write code. Map where bad data can enter. Then block every weak spot. Simple rules like using HTTPS and parameterized queries make a big difference.
Follow the three tiers: always do, ask first, and never do. Never commit secrets or trust client-side checks. Security is not extra work. It is part of building anything that handles real people's information.
Global
mkdir -p ~/.claude/skills/security-and-hardeningProject
mkdir -p .claude/skills/security-and-hardeningSource Repository
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