Agent Threat Model

Q: What is a Claude Code skill and how does the Agent Threat Model skill fit in?

A Claude Code skill is a SKILL.md file that lives under ~/.claude/skills/<name>/ and tells the Claude Code CLI agent how to perform a specific task (instructions, prompts, allowed tools). Skills are auto-discovered at session start. Agent Threat Model is one of 67,000+ skills indexed in the open ClaudSkills catalog, classified under the Security category. Learn more at https://claudskills.com/learn/what-is-skill-md/.

Category: Security · Sub-category: web-security · Last updated: 2026-10-25

Write a threat model for an LLM-agent system by drafting principals, tools, channels, data stores and controls in YAML from the code, running the atm analyser for STRIDE and OWASP findings, and summarising with incident precedents. Use when asked to \"threat model this agent\", for its attack surface, or for a design review. Not for scanning code (semgrep-agentic) or a ship decision (secure-agent-checklist).

Security AStatic scan found no risk patternsHow grading works ›

From the source SKILL.md

[agent-threat-model](https://github.com/basitalisandhu/agent-threat-model) (atm) is a deterministic, offline threat-modelling tool: describe the system in one YAML file, and it applies a catalogue of 30 agent-specific threats (STRIDE plus OWASP mappings, each with an applies_when rule) and 29 controls, scores inherent and residual severity, and renders a table, Markdown, JSON, SARIF or HTML. The hard part is the description. This skill drafts it from the code in the tool's exact format ([references/input-format.md](references/input-format.md)), walks you through the facts static scanning…

What this skill does

Agent Threat Model is a community-contributed Claude Code skill in the web-security sub-category. It ships as a SKILL.md file that Claude Code auto-discovers under ~/.claude/skills/agent-threat-model/ and loads when your prompt matches the skill's trigger.

When to invoke it: Use when asked to \"threat model this agent\", for its attack surface, or for a design review. Not for scanning code (semgrep-agentic) or a ship decision (secure-agent-checklist).

Who uses this skill

The Agent Threat Model Claude Code skill is built for security engineers, penetration testers, DevSecOps practitioners, and development teams hardening codebases and infrastructure. It's part of ClaudSkills (also referred to as Claude Skills or Claude Code Skills) — the open community-curated registry of 213,000+ SKILL.md files for Anthropic's Claude Code agent and the wider Claude ecosystem (Claude API, Claude Agent SDK).

How to install

Free

Manual install (2 steps)

mkdir -p ~/.claude/skills/agent-threat-model
curl -L https://claudskills.com/skills/agent-threat-model/SKILL.md \
  -o ~/.claude/skills/agent-threat-model/SKILL.md

Or just download SKILL.md directly and drop it into ~/.claude/skills/agent-threat-model/. Claude Code auto-discovers it on next session.

Skills live at ~/.claude/skills/agent-threat-model/SKILL.md on macOS/Linux, or %USERPROFILE%\.claude\skills\agent-threat-model\SKILL.md on Windows. See the full install guide for step-by-step instructions.

📱 Install from your phone or desktop Telegram

Open @claudskills_bot on Telegram, tap Open Desktop App, and the desktop app installs this skill for you. Or share the bot link with a colleague — they get the same one-tap install. Learn more →

Pro

One-click install via the desktop app

The ClaudSkills desktop app installs any skill directly into ~/.claude/skills/ with one click — no terminal required. Pro starts at $9/mo or $149 lifetime.

Pro

For the full experience including quality scoring and one-click install features for each skill — upgrade to Pro.

See pricing → Download desktop app

Frequently asked questions

How do I install the Agent Threat Model Claude Code skill?

Install via the ClaudSkills desktop app (one click) or copy SKILL.md from the source repository to ~/.claude/skills/agent-threat-model/SKILL.md and restart Claude Code. Both flows are detailed at claudskills.com/install/.

What does the Agent Threat Model skill do?

Is this skill free to install?

Yes. ClaudSkills is an open registry — every skill keeps its source repository's license, and manual install via copy is free. ClaudSkills Pro ($9/mo, $79/yr, or $149 one-time) adds one-click install via the desktop app and a multi-signal Quality Score.

When should I use the Agent Threat Model skill?

Use Agent Threat Model when your Claude Code task falls under the Security category — specifically in the web security area. Claude Code auto-discovers installed skills and invokes the right one based on the task description, so you can also ask Claude directly (e.g. "use Agent Threat Model" or describe the task and let Claude pick). Browse related skills at /category/security/.

What is a Claude Code skill and how does the Agent Threat Model skill fit in?

A Claude Code skill is a SKILL.md file that lives under ~/.claude/skills/<name>/ and tells the Claude Code CLI agent how to perform a specific task (instructions, prompts, allowed tools). Skills are auto-discovered at session start. Agent Threat Model is one of 67,000+ skills indexed in the open ClaudSkills catalog, classified under the Security category. Learn more at /learn/what-is-a-claude-skill/.

Attribution & license

Source: https://github.com/basitalisandhu/claude-skills/blob/HEAD/plugins/agent-security/skills/agent-threat-model/SKILL.md
License: MIT
Author: basitalisandhu
Website: https://basitalisandhu.github.io/claude-skills/

Cite this skill

If you reference this skill in a blog post, paper, or documentation, you can cite it as:

APA

basitalisandhu. (2026). Agent Threat Model [Claude Code skill]. ClaudSkills. https://claudskills.com/skills/agent-threat-model/

BibTeX

@misc{agent-threat-model-2026,
  author    = {basitalisandhu},
  title     = {Agent Threat Model [Claude Code skill]},
  year      = {2026},
  publisher = {ClaudSkills},
  url       = {https://claudskills.com/skills/agent-threat-model/}
}

Embed this skill

Promote, attribute, or link this skill from your own README, blog post, or documentation. All three snippets are free to use — no sign-up, no API key. More distribution surfaces →

Badge

[![ClaudSkills](https://claudskills.com/badge/agent-threat-model.svg)](https://claudskills.com/skills/agent-threat-model/?utm_source=badge&utm_medium=readme&utm_campaign=skill_badge)

Security scan

Grade A · scanned 2026-11-01 — free static scan against the OWASP Agentic Skills Top 10.

No risk patterns were found in any of the ten OWASP-aligned categories. How grading works ›

✓ Prompt injection
✓ Data exfiltration
✓ Supply chain
✓ Reverse shell
✓ Credentials
✓ Execution
✓ Filesystem
✓ Persistence
✓ Obfuscation
✓ Network

Show this grade on your repo (click to copy):

[![Security: A](https://img.shields.io/badge/Security-A-2e7d32)](https://claudskills.com/skills/agent-threat-model/#security)

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Browse all Security skills → Top 100 skills

Part of ClaudSkills — the open registry for Claude Skills & Claude Code Skills. · What's New · Install guide · About · llms.txt

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