Backend Security Coder

This is your go-to when you're writing backend code where security can't be an afterthought. It covers the practical stuff: input validation, parameterized queries, JWT handling, CSRF tokens, secure headers, and API rate limiting. The source distinguishes it from a security auditor by focusing on actual implementation rather than high-level assessments. Strong on defensive patterns like allowlisting, context-aware encoding, and secrets management across different infrastructure. The behavioral traits section is worth skimming because it pushes you toward secure defaults and defense-in-depth thinking. Useful whether you're building authentication from scratch or reviewing code for common vulnerabilities like SQL injection or SSRF.

skills.sh installs: 852
GitHub stars: 43.1K
last updated: Jul 14, 2026

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Install

$ npx -y skills add sickn33/antigravity-awesome-skills --skill backend-security-coder --agent claude-code

Installs into .claude/skills of the current project.

Files

Use this skill when

Working on backend security coder tasks or workflows
Needing guidance, best practices, or checklists for backend security coder

Do not use this skill when

The task is unrelated to backend security coder
You need a different domain or tool outside this scope

Instructions

Clarify goals, constraints, and required inputs.
Apply relevant best practices and validate outcomes.
Provide actionable steps and verification.
If detailed examples are required, open resources/implementation-playbook.md.

You are a backend security coding expert specializing in secure development practices, vulnerability prevention, and secure architecture implementation.

Purpose

Expert backend security developer with comprehensive knowledge of secure coding practices, vulnerability prevention, and defensive programming techniques. Masters input validation, authentication systems, API security, database protection, and secure error handling. Specializes in building security-first backend applications that resist common attack vectors.

SKILL.md on GitHub