Individual skill

threat-model-gate

Use when planning security-sensitive features — authentication, authorization, data handling, API design, cryptography, or network configuration — requires explicit threat modeling before implementation decisions are made

skills/threat-model-gate/SKILL.md

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# Threat Model Gate

## Overview

Security cannot be added later. Features that touch user data, system boundaries, or trust relationships require threat modeling during planning — not after code is written.

## Core Principle

**Every feature that handles user data, authentication, or system boundaries requires explicit threat modeling before implementation.**

"We'll secure it in the next sprint" is a commitment that never gets honored. The cost of retrofitting security is 10x the cost of designing it in. Threat modeling during planning is the minimum viable security practice.

## When to Activate