c4 SKILL.md skillB
c4 from karsten-s-nielsen/mad-scientist-skills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add karsten-s-nielsen/mad-scientist-skills/c4@git:20260813.1e1da60Pins git:20260813.1e1da60 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- B, 16 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- karsten-s-nielsen/mad-scientist-skills
- Path
plugins/mad-scientist-skills/skills/c4/SKILL.md- Versions recorded
- 5
- Latest version
- git:20260813.1e1da60, committed Aug 13, 2026
- First version recorded
- Jul 24, 2026
- Size
- 48,389 bytes
- Repository stars
- 3
- License
- MIT
Creates interactive C4 model architecture diagrams using Structurizr DSL — the official C4 notation by Simon Brown. Produces self-contained single-file HTML visualizations with embedded SVGs rendered locally via Java 21+ and the Structurizr export pipeline (structurizr.war + plantuml.jar). Generates System Context, Container, Component, Dynamic, and Deployment diagrams with tabbed navigation, DSL panel, and copyable Structurizr DSL source. Requires Java 21+ and Graphviz — verify Graphviz with…
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# C4 Architecture Diagram Builder A C4 diagram is a self-contained HTML file that visualizes software architecture at multiple zoom levels using the C4 model. This skill uses [Structurizr DSL](https://docs.structurizr.com/dsl) — the official C4 model notation created by Simon Brown — as the source language. Diagrams are rendered locally via a two-stage pipeline: Structurizr exports DSL to PlantUML C4, then plantuml.jar renders SVGs. SVGs are embedded directly in the HTML — making the output fully self-contained and offline-capable. ## Why Structurizr DSL? - **Official format** — Structurizr DSL is the canonical C4 authoring language by the creator of C4 - **Model-first** — Define the model once, create multiple views from it (no duplication) - **Portable** — DSL files can be imported into Structurizr tools and other C4-compatible software - **Cleaner syntax** — No `@startuml`/`@enduml` wrappers or `!include` directives ## When to use this skill When the user asks for: - Architecture diagrams or system diagrams - C4 model diagrams (Context, Container, Component) - Software structure visualization - "How does this system fit together?" …
Read the whole file at its exact version.
How to install
mdr add karsten-s-nielsen/mad-scientist-skills/c4@sha256:05cb5c9063de58e8The line at the top of this page pins the label git:20260813.1e1da60, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_tdunln2fabz24jaa)
3 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 5 versions of this file, between Jul 24, 2026 and Aug 13, 2026, about one every 5 days. Its first recorded version is graded A and its latest B.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20260813.1e1da60 latest | 2026-08-13 | 1e1da60 | 48,389 B | B | view · diff |
| git:20260811.63dc6c8 | 2026-08-11 | 63dc6c8 | 40,897 B | A | view · diff |
| git:20260728.773bf49 | 2026-07-28 | 773bf49 | 39,068 B | A | view · diff |
| git:20260724.35d8a81 | 2026-07-24 | 35d8a81 | 37,731 B | A | view · diff |
| git:20260724.1950438 | 2026-07-24 | 1950438 | 37,668 B | A | view |
Audit of the latest version
- fail: No script tag (matched: <script)
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (48389 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
Starting a new one? Use a template for SKILL.md on mdpantry, which passes every one of these checks and says what to change in it.
Source
karsten-s-nielsen/mad-scientist-skills · 3 stars · license MIT · pushed 2026-10-01 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_tdunln2fabz24jaa GET https://markdownregistry.com/api/v1/resolve?ref=karsten-s-nielsen/mad-scientist-skills/c4 GET https://markdownregistry.com/api/v1/blob/05cb5c9063de58e83ffe8122e84f637259859f1c0399a139c71f789de7051a24
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.