threat-model

Identify missing security controls and gaps in system design before implementation.

20|Updated Feb 27, 2026
One-click install
npx skills add https://github.com/thejefflarson/soundcheck --skill threat-model-thejefflarson
Or copy as Structured Prompt for Agent
Please help me install this Agent Skill.
Skill: threat-model
Source: https://github.com/thejefflarson/soundcheck/tree/main/.claude/skills/threat-model
Command: npx skills add https://github.com/thejefflarson/soundcheck --skill threat-model-thejefflarson

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

Threat modeling helps teams identify security gaps early in the design phase, reducing risk and rework across features and systems.

Core Features & Use Cases

  • Structured threat modeling prompts for planning new features, APIs, and data pipelines
  • Checklist-guided design reviews that surface authentication, authorization, data protection, and abuse-prevention gaps
  • Auditable mitigation steps and risk-mitigation plans embedded in the feature design process

Quick Start

Describe your new feature and map trust boundaries, data flows, and authentication requirements to generate an initial threat-modeling plan.

Frequently Asked Questions about threat-model

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

FAQPage Schema
How do I identify missing security controls before implementing a new API?

Threat modeling helps identify security gaps early by mapping trust boundaries, data flows, and authentication requirements for new features. It applies a structured design checklist to surface missing controls and enforce mitigation steps before implementation begins.

How do I map trust boundaries and data flows for a new data pipeline?

Map trust boundaries and data flows for a new data pipeline by applying a checklist-guided design review to user-supplied data handling and external service integrations. This surfaces authorization and data protection gaps, embedding auditable mitigation steps directly into your pipeline plan.

What is the best way to plan secure-by-design features from the start?

The best way to plan secure-by-design features is applying a structured threat-modeling process that evaluates authentication flows and abuse prevention. This surfaces design gaps early, reducing risk and rework by embedding explicit risk-mitigation plans into the feature design process.

Can I use threat modeling for external service integrations and user-supplied data handling?

Yes, you can use threat modeling for external service integrations and user-supplied data handling. The process evaluates trust boundaries and authentication flows, applying validation rules and audit-logging requirements to ensure these integrations are secure-by-default.

Does this threat modeling approach work for reviewing existing system components?

Yes, this threat modeling approach works for reviewing existing system components, APIs, and data pipelines. It applies a structured design checklist to identify missing controls, enforce validation rules, and generate auditable mitigation steps for any system component.

Why should I do threat modeling during the design phase instead of after implementation?

You should do threat modeling during the design phase to identify security gaps before implementation, which reduces risk and rework. Fixing missing controls early is cheaper and ensures features are secure-by-default rather than requiring costly post-implementation patches.