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security-first

Enforce OWASP-aligned security controls across web application lifecycles.

Updated Jan 23, 2026
Search Tags:#security#owasp#defense-in-depth#input-validation#secure-coding#least-privilege
One-click install
npx skills add https://github.com/Gdm0714/claude-code-resource --skill security-first-gdm0714
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: security-first
Source: https://github.com/Gdm0714/claude-code-resource/tree/main/skills/security-first
Command: npx skills add https://github.com/Gdm0714/claude-code-resource --skill security-first-gdm0714

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

This Skill provides a comprehensive, practitioner's guide to secure software development, helping teams embed security thinking into every phase of coding, testing, and deployment.

Core Features & Use Cases

  • Never trust inputs and verify everything to prevent common vulnerabilities.
  • Apply the principle of least privilege and defense in depth to minimize risk.
  • Align with OWASP Top 10 and security checklists to reduce exposure across web applications.

Quick Start

Implement the guide's core practices immediately by validating all inputs, enforcing least privilege, and enabling defense in depth in your project.

Frequently Asked Questions about security-first

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I implement secure coding practices to prevent OWASP Top 10 vulnerabilities?▼

Defense in depth secures applications by layering multiple independent controls like input validation, least privilege, and secure configuration. This ensures that if one security mechanism fails, additional layers remain to protect the system.

What is defense in depth and how does it protect web applications?▼

Defense in depth protects web applications by layering multiple independent controls such as input validation, least privilege, and secure configuration. This ensures that if one security mechanism fails, additional layers remain to protect the system.

Why does input validation fail to stop common web app vulnerabilities?▼

Input validation fails when it relies on blocklists instead of strict allowlists or skips server-side checks. Secure coding requires verifying everything and never trusting inputs, ensuring data minimization and robust protection against injection attacks.

Can I apply these secure coding practices to an existing web application?▼

Yes, you can apply these practices to existing web applications by progressively enforcing input validation, adopting least privilege for access controls, and implementing secure configuration and data minimization across your current deployment lifecycle.

What's the best way to align software development with OWASP security checklists?▼

The best way to align development with OWASP security checklists is to embed threat modeling and enforce requirements for input validation, least privilege, and secure logging into every phase of coding, testing, and deployment.

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