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Mermaid Diagram Generator

Name: Mermaid Diagram Generator
Availability: InStock
Author: shalomb

skill-shalomb-agent-skills-mermaid-diagram-generator · by shalomb

Guide on creating and editing Mermaid charts safely. Use when asked to draw a diagram, flowchart, or architecture chart. Triggers on: 'mermaid', 'diagram', 'flowchart', 'visualize'.

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Install

$ agentstack add skill-shalomb-agent-skills-mermaid-diagram-generator

✓ scanned · ✓ verified — works with Claude Code, Cursor, and more.

Security review

✓ Passed

No issues found. Passed automated security review. · v0.1.0 How review works →

✓ Prompt-injection patterns
✓ Secret / credential exfiltration
✓ Dangerous shell & filesystem operations
✓ Untrusted network calls
✓ Known-malicious package signatures

What it can access

✓ Network access No
✓ Filesystem access No
✓ Shell / process execution No
✓ Environment & secrets No
✓ Dynamic code execution No

From automated source analysis of v0.1.0. “Used” means the capability is present in the source — more access means more to trust, not that it’s unsafe.

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About

Mermaid Skill

Use this skill to quickly validate Mermaid diagrams by parsing + rendering them with the official Mermaid CLI.

Prerequisites

Node.js + npm (for npx).
First run downloads a headless Chromium via Puppeteer. If Chromium is missing, set PUPPETEER_EXECUTABLE_PATH.

Tool

Validate a diagram

./tools/validate.sh diagram.mmd [output.svg]

Parses and renders the Mermaid source.
Non-zero exit = invalid Mermaid syntax.
Prints an ASCII preview using beautiful-mermaid (best-effort; not all diagram types are supported).
If output.svg is omitted, the SVG is rendered to a temp file and discarded.

Workflow (short)

If the diagram will live in Markdown: draft it in a standalone diagram.mmd first (the tool only validates plain Mermaid files).
Write/update diagram.mmd.
Run ./tools/validate.sh diagram.mmd.
Fix any errors shown by the CLI.
Once it validates, copy the Mermaid block into your Markdown file.

Source & license

This open-source skill is cataloged on AgentStack and links to its original source — we do not rehost the code.

Author: shalomb
Source: shalomb/agent-skills
License: MIT

Install and usage instructions live in the source repository linked above.

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Versions

v0.1.0 Imported from the upstream source.