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security-pro-dev

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Secure development lifecycle: threat modeling, secure coding, dependency management, and security testing for builders. Use when designing, coding, or shipping software securely.

skills/security-pro-dev/SKILL.md

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# Security Pro (Dev)

## Overview

Secure development isn't a phase — it's **how you build**: threat-model the design, write code
that defaults to safe, manage dependencies like the attack surface they are, and test for security
continuously. This skill is the builder's security playbook, distinct from the security-review
perspective: it's about baking security into everyday development rather than auditing it afterward.

The through-line: the cheapest vulnerability is the one never written — design and defaults do more
than scanners.

## When to use
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