# castellan

> castellan — cognis-digital-castellan. Use this tool when you need to manage and analyze threat models for your infrastructure and applications, leveraging frameworks like STRIDE and LINDDUN to identify and mitigate potential security risks. It takes in specifications or infrastructure-as-code (IaC) as input and provides output in the form of risk assessments and compliance checks against 625 frameworks. Use castellan to streamline your security auditing process and ensure compliance with various regulatory standards.

Canonical page: https://skillsregistry.net/skills/cognis-digital-castellan  
JSON: https://api.skillsregistry.net/v1/skills/cognis-digital-castellan

## Description

🏰 castellan — the keeper of your threat model. Offline, MCP-native threat modeling: STRIDE + LINDDUN, DREAD risk, attack trees & 625 compliance frameworks, from a spec or your IaC.

## Trust

- **Trust score (0–1):** 0.50
- **Verification tier:** unverified

## Facts

- **Version:** 1.0.0
- **Skill type:** atomic
- **Execution layer:** container
- **Runtime environment:** vm
- **Updated:** 2026-09-21

## Source

- **Source listing:** [GitHub](https://github.com/cognis-digital/castellan)

## Use it

Resolve this record through the SkillsRegistry MCP server (no auth, read-only):

```
claude mcp add --transport http --scope user skillsregistry https://api.skillsregistry.net/mcp
```

```json
{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "get_skill",
    "arguments": {
      "slug": "cognis-digital-castellan"
    }
  }
}
```

REST: `GET https://api.skillsregistry.net/v1/skills/cognis-digital-castellan` · pull for local use: `GET https://api.skillsregistry.net/v1/skills/cognis-digital-castellan/pull`

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SkillsRegistry indexes agent skills from public registries and GitHub. Skills we have analysed are scanned with Circle-IR and scored on six dimensions; each listing states its scan coverage. More: https://skillsregistry.net/llms.txt