threat-modeler

threat-modeler is an agent for Claude Code from allsmog/vuln-scout. It costs 60 tokens per session (3,297 once invoked), scanned A, original, MIT.

A specialised analysis agent for threat modelling, the practice of identifying what could go wrong in an application before attackers exploit it. It breaks down systems, maps how data moves, and uses STRIDE, a checklist of common threat types.

In plain words
What is it for?
Use it to analyse application components and data flows, identify attack vectors, generate Mermaid diagrams, apply STRIDE categories, and prioritise threats.
Why use it?
It gives a structured view of attack paths and trust boundaries, so security risks are considered before implementation or release.

Agent for Claude Code

Written for Claude Code: shipped in a Claude Code plugin. Also seen: model in frontmatter; names the TodoWrite tool.

Part of the vuln-scout plugin — 32 skills, 15 commands, 9 agents shipped together

Good fit Use it to analyse application components and data flows, identify attack vectors, generate Mermaid diagrams, apply STRIDE categories, and prioritise threats.

Compare 6 agents from other repositories ↓
Install with agentmods
npx agentmods add agents/allsmog/vuln-scout/threat-modeler
Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Clone the repo
git clone --depth 1 https://github.com/allsmog/vuln-scout

Made for: Claude Code.

Or install vuln-scout, the plugin that ships this one along with the rest of its 32 skills, 15 commands, 9 agents.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for threat-modeler

README.md
[![agentmods](https://agentmods.dev/badge/agents/allsmog/vuln-scout/threat-modeler/github.svg)](https://agentmods.dev/agents/allsmog/vuln-scout/threat-modeler)
Your own site
<a href="https://agentmods.dev/agents/allsmog/vuln-scout/threat-modeler"><img src="https://agentmods.dev/badge/agents/allsmog/vuln-scout/threat-modeler/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for threat-modeler

Your own site · 80×15
<a href="https://agentmods.dev/agents/allsmog/vuln-scout/threat-modeler"><img src="https://agentmods.dev/badge/agents/allsmog/vuln-scout/threat-modeler.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 60 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 3,297 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00060 $0.03297
Opus 5 $0.00030 $0.01648
Sonnet 5 $0.00012 $0.00659
Haiku 4.5 $0.00006 $0.00330

Measured 9d ago against content hash 66c058d28402, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-09, from the pricing page.

Security

Grade A, and why

threat-modeler scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 9d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

vuln-scout/agents/threat-modeler.md · 407 lines

How it starts

The opening of the file, as written. The whole thing — 407 lines — stays where its author put it; the contents beside it link to each section on GitHub.

You are a specialized threat modeling agent. Your role is to systematically identify security threats through technology decomposition, data flow analysis, and STRIDE-based threat enumeration.

Examples

Philosophy:

"Threat modeling answers 'What could go wrong?' before attackers demonstrate it."

Your Core Responsibilities:

  1. Decompose the application into analyzable components
  2. Map data flows and trust boundaries
  3. Generate visual diagrams (Mermaid format)
  4. Apply STRIDE analysis to each component
  5. Score and prioritize threats
  6. Produce actionable threat model documentation

Read the full file on GitHub · 407 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 9d ago First seen · 407 lines · 60 tokens per session scan A 66c058d28402

Subscribe to this mod's changes

threat-modeler is an agent published in the GitHub repository allsmog/vuln-scout (24 stars, last pushed 2mo ago), licensed MIT. It adds 60 tokens to every session and 3,297 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.