mermaid-diagrams SKILL.md skillB

mermaid-diagrams from magnus919/agent-skills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.

Install it, pinned
mdr add magnus919/agent-skills/mermaid-diagrams@git:20260823.b084577

Pins git:20260823.b084577 in mdr.lock. Pin the fingerprint instead.

Audit grade
B, 16 of 17 checks passed
Kind
SKILL.md skill
Repository
magnus919/agent-skills
Path
mermaid-diagrams/SKILL.md
Versions recorded
3
Latest version
git:20260823.b084577, committed Aug 23, 2026
First version recorded
Jul 12, 2026
Size
10,304 bytes
Repository stars
162
License
MIT

Author, render, troubleshoot, and review Mermaid diagrams for documentation, architecture, processes, and technical communication. Use when a versionable diagram must communicate a defined audience job across a real renderer, including narrative, hierarchy, labels, legends, accessibility fallback, and uncertainty. Do not use for C4 level/model ownership, architecture decisions, or full accessibility conformance.

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

# Mermaid Diagrams

Portable Mermaid.js diagramming for architectural documentation. Not tied to any blog platform, theme, or rendering engine. Diagrams can be rendered via CLI, embedded in markdown, or served as HTML snippets.

## When to Use

Load this skill when:
- Rendering C4 flowchart approximations after the C4 level and model have been chosen; use `c4-diagramming` for C4 modeling decisions
- Producing sequence diagrams for interaction flows
- Designing flowcharts for process documentation
- Building state/class/ER diagrams for specification
- Generating any diagram that needs to render in both agent-facing and human-facing contexts
- Reviewing whether a structurally valid Mermaid diagram is the right communication artifact for its audience and output surface

Do NOT load when:
- A plain text outline communicates the relationship more clearly than a diagram.
- The target renderer cannot execute Mermaid and no pre-rendering path is available.

## PDF Output — Pre-render Required

Mermaid code blocks (```mermaid```) do NOT render in the Pandoc → HTML → Puppeteer PDF pipeline. The pipeline generates static HTML with no JavaScript execution.
…

Read the whole file at its exact version.

How to install

The exact contents, by fingerprint
mdr add magnus919/agent-skills/mermaid-diagrams@sha256:222f1a8bd6f50c80

The line at the top of this page pins the label git:20260823.b084577, 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.

Badge

mdr badge

[![mdr](https://markdownregistry.com/badge/art_ipk4uiz5veddlzu6.svg)](https://markdownregistry.com/a/art_ipk4uiz5veddlzu6)

3 badge image fetches in 30 days. What the badge shows.

Versions

The registry has recorded 3 versions of this file, between Jul 12, 2026 and Aug 23, 2026, about one every 21 days.

versioncommittedcommitsizeaudit
git:20260823.b084577 latest2026-08-23 b084577 10,304 BB view · diff
git:20260821.f6dc2ce2026-08-21 f6dc2ce 10,272 BB view · diff
git:20260712.7057f3c2026-07-12 7057f3c 8,340 BB view

Audit of the latest version

B  16 of 17 checks passed. Fixed automatic checks with no AI involved, so the same checks give the same answer every run.
  • 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 (10304 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

GitHub

magnus919/agent-skills · 162 stars · license MIT · pushed 2026-11-01 · branch main

API

GET https://markdownregistry.com/api/v1/artifacts/art_ipk4uiz5veddlzu6
GET https://markdownregistry.com/api/v1/resolve?ref=magnus919/agent-skills/mermaid-diagrams
GET https://markdownregistry.com/api/v1/blob/222f1a8bd6f50c80bed885f06cca317771cba27725b68ea19e54dad5bc158f38

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.

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