c4plantuml SKILL.md skillA
c4plantuml from antoinebou12/uml-mcp is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add antoinebou12/uml-mcp/c4plantuml@git:20261023.634e385Pins git:20261023.634e385 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- antoinebou12/uml-mcp
- Path
.skill/skills/c4plantuml/SKILL.md- Versions recorded
- 1
- Latest version
- git:20261023.634e385, committed Oct 23, 2026
- Size
- 2,829 bytes
- Repository stars
- 110
- License
- MIT
Writes valid c4plantuml diagram source for uml-mcp (diagram_type=c4plantuml). C4 model diagrams using PlantUML Use when the user asks for c4plantuml or that notation; then call validate_uml / generate_uml / generate_uml_image.
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
# c4plantuml diagram (uml-mcp) **`diagram_type`:** `c4plantuml` **Backend:** `c4plantuml` **Output formats:** png, svg, pdf, txt, base64 C4 model diagrams using PlantUML Load the workflow skill [uml-mcp-diagrams](../uml-mcp-diagrams/SKILL.md) for URL-first replies, progressive discovery, and which MCP tool to call. This file is notation only; it does not add an MCP tool. ## Notation tips - Use PlantUML C4 includes; pick context or container view. - Keep relationships labeled; stay under ~30 elements or split views. ## Themes Pass **`theme`** to `generate_uml` / `generate_uml_image` (PlantUML built-in name). The server injects `!theme <name>` after `@startuml` when the source has no `!theme` yet. Recommended: `cerulean`, `materia`, `sketchy`, `cyborg`, `plain`, `aws-orange`, `blueprint`, `sandstone`. Match the **page background** (also see MCP prompt **`diagram_theme`**): - light / white: `cerulean`, `materia`, `plain`, `sketchy`, `sandstone` - dark / black: `blueprint`, `cyborg`, `black-knight`, `carbon-gray`, `crt-green` - B&W / print: `plain`, `sketchy`, `sketchy-outline`, `mimeograph`, `lightgray` Or embed in source: ```plantuml @startuml !theme cerulean …
Read the whole file at its exact version.
How to install
mdr add antoinebou12/uml-mcp/c4plantuml@sha256:9686f1a2f0ae3ab0The line at the top of this page pins the label git:20261023.634e385, 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_q6vhenn6rsbtrpue)
2 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 1 version of this file, committed on Oct 23, 2026.
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (2829 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
- pass: No script tag
Source
antoinebou12/uml-mcp · 110 stars · license MIT · pushed 2026-10-31 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_q6vhenn6rsbtrpue GET https://markdownregistry.com/api/v1/resolve?ref=antoinebou12/uml-mcp/c4plantuml GET https://markdownregistry.com/api/v1/blob/9686f1a2f0ae3ab0879efcb3b2f27fc1021ea13166212fa2b296e4e92a89f5b7
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.