blockdiag SKILL.md skillA
blockdiag 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/blockdiag@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/blockdiag/SKILL.md- Versions recorded
- 1
- Latest version
- git:20261023.634e385, committed Oct 23, 2026
- Size
- 1,578 bytes
- Repository stars
- 110
- License
- MIT
Writes valid blockdiag diagram source for uml-mcp (diagram_type=blockdiag). Simple block diagram images Use when the user asks for blockdiag 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
# blockdiag diagram (uml-mcp)
**`diagram_type`:** `blockdiag`
**Backend:** `blockdiag`
**Output formats:** png, svg, pdf
Simple block diagram images
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.
## Styling
- Optional `default_shape`, `node_width`, colors via `color = "…"` on nodes.
- Keep to one row/column flow for chat thumbnails.
## Starter template
```blockdiag
blockdiag {
User -> System -> Database;
System -> User;
}
```
## Example
```blockdiag
blockdiag {
Kroki -> generates -> "Block diagrams";
Kroki -> is -> "very easy!";
Kroki [color = "greenyellow"];
"Block diagrams" [color = "pink"];
"very easy!" [color = "orange"];
}
```
## Render with uml-mcp
1. Set `diagram_type` to `blockdiag` exactly.
2. Call **`validate_uml`** when the source is untrusted (prefer `strict: true` for Mermaid sequence).
3. Call **`generate_uml`**, **`generate_uml_image`** (chat PNG), or **`generate_uml_batch`**.
4. Pass **`theme`** when this skill's Themes section lists supported values.
…Read the whole file at its exact version.
How to install
mdr add antoinebou12/uml-mcp/blockdiag@sha256:d8d2fb3203e3b12aThe 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_233uc6focsfhnj4y)
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 (1578 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_233uc6focsfhnj4y GET https://markdownregistry.com/api/v1/resolve?ref=antoinebou12/uml-mcp/blockdiag GET https://markdownregistry.com/api/v1/blob/d8d2fb3203e3b12afe09691c97b1c449e0fb3a9177f0308f84e07da41072370c
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.