TypingMindTypingMindThe best frontend for AI
Mermaid Validate logo

Mermaid Validate

Community
diegomarino
mermaid-validate

Validate Mermaid syntax in .md files or directories

Overview

Publisherdiegomarino
Repositoryclaude-toolshed
Skill namemermaid-validate
Stars
58
Forks
5
Bundled files
Instructions only
Links
Skill sourceRepository
  • Markdown instructions

    A SKILL.md file the model loads on demand, so it only costs tokens when a request actually matches.

  • Works with any LLM

    AI skills are plain Markdown, not provider-specific code, so this works with GPT, Claude, Gemini, Grok, or a local model.

  • Self-contained

    Everything the model needs lives in the instructions — no extra files to sync.

  • Open source

    Published by diegomarino on GitHub. Read the source before you install it.

Installation

Install the Mermaid Validate AI skill in TypingMind to use it with any LLM, or drop it into another agent that reads SKILL.md.

1

Install in TypingMind

TypingMind installs a skill straight from its GitHub folder — it reads SKILL.md, bundles the resource files, and stores the result locally.

  1. Open the app and go to Plugins → Skills.
  2. Choose "Install from GitHub".
  3. Paste the skill folder URL below and confirm.
    https://github.com/diegomarino/claude-toolshed/tree/main/plugins/mermaid/skills/mermaid-validate
  4. Enable the skill in any chat where you want it available.
Plugins → Skills → Add skill → From GitHub URL, then paste the folder URL and press Continue.
2

Install in another agent

Any agent that reads the Agent Skills format can use this skill — copy the folder into that agent's skills directory.

Claude Code — .claude/skills
git clone --depth 1 https://github.com/diegomarino/claude-toolshed.git /tmp/claude-toolshed
mkdir -p .claude/skills
cp -r /tmp/claude-toolshed/plugins/mermaid/skills/mermaid-validate .claude/skills/mermaid-validate
Restart Claude Code after copying so it picks up the new skill.

Use it in TypingMind

Enable Mermaid Validate in any TypingMind chat and the model takes it from there. Its name and description sit in the system prompt, and the moment a request matches, the model loads the full instructions itself — you never invoke it by hand, and it costs no tokens until it is actually used.

The model loads Mermaid Validate on its own as soon as a request matches it.

Works with any AI model

AI skills are plain Markdown instructions rather than provider-specific code, so Mermaid Validate is not tied to the model it was written for. Install it once in TypingMind and use it with GPT-5, Claude, Gemini, Grok, DeepSeek, Mistral, Llama, or a local model you run yourself — all on your own API keys.

  • Loaded only when it is needed

    The system prompt carries just the name and description. The instructions are fetched on the first matching request, so an idle skill costs nothing.

  • Switch models mid-chat

    Because the skill is instructions rather than code, changing model does not break it — the next model reads the same SKILL.md.

Skill instructions

This is the SKILL.md content the model loads. Read it before installing — a skill is instructions your model will follow.

/mermaid-validate

User request: "$ARGUMENTS"

Task

Check Mermaid syntax for all diagrams found in a given file or directory.

Process

  1. Resolve Plugin Path: Run once before executing any scripts:

    bash
    find "$HOME/.claude/plugins/cache" -type d -name "mermaid" -path "*/skills/mermaid" 2>/dev/null | head -1

    If empty, run fallback (for dev/repo usage):

    bash
    find "$HOME" -maxdepth 8 -type d -name "mermaid" -path "*/skills/mermaid" 2>/dev/null | head -1

    Use the returned path as PLUGIN_DIR in all steps below.

  2. Ensure Dependencies:

    bash
    bash "$PLUGIN_DIR/scripts/ensure-deps.sh"

    If .claude/mermaid.json does not exist, display a one-time nudge before continuing:

    First time using the mermaid plugin? Run /mermaid-config to pick a theme and output settings. Using defaults for now (zinc-light, ./diagrams).

  3. Resolve Target Path:

    • If no path is provided, use the current directory.
    • If the path is a file, validate that single file.
    • If the path is a directory, find all .md files containing Mermaid blocks.

  4. Optional Config:

    • If .claude/mermaid.json exists, read defaults:
      • output_directory (default: ./diagrams)

    Resolve output path:

    • If output_directory is "same" AND an input file path is known: OUTPUT_DIR=$(dirname {input_file}) (for a directory argument, use the directory itself)
    • If output_directory is "same" AND no argument was provided: OUTPUT_DIR=./diagrams
    • Otherwise: OUTPUT_DIR={output_directory}

  5. Validate:

    • For each markdown file: node "$PLUGIN_DIR/scripts/extract_mermaid.js" <file> --validate

  6. Report:

    • Summarize pass/fail per file.
    • If a file fails, point to $PLUGIN_DIR/references/guides/troubleshooting.md.

Output

  • ✅ Summary of files validated
  • ❌ List of failures with errors

Reference

  • Troubleshooting: $PLUGIN_DIR/references/guides/troubleshooting.md

Frequently asked questions

What does the Mermaid Validate AI skill do?

Validate Mermaid syntax in .md files or directories

Why use Mermaid Validate on TypingMind?

Because you install it once and use it with any model. Mermaid Validate is plain Markdown rather than provider-specific code, so the same skill runs on GPT-5, Claude, Gemini, Grok, or a local model — and you can switch model mid-chat without it breaking. TypingMind runs on your own API keys, so you pay providers directly instead of a per-seat subscription, and your skills and chats stay in your own storage.

How do I install Mermaid Validate in TypingMind?

Open Plugins → Skills → Install from GitHub in TypingMind and paste https://github.com/diegomarino/claude-toolshed/tree/main/plugins/mermaid/skills/mermaid-validate. TypingMind reads its SKILL.md and installs it as a skill you can enable per chat.

Which AI models can use Mermaid Validate?

Any model you connect in TypingMind. AI skills are plain Markdown instructions rather than provider-specific code, so GPT, Claude, Gemini, Grok, and local models can all load this skill when a request matches it.

How many AI models can I use with Mermaid Validate?

As many as you like. As long as a model supports skills, you can use Mermaid Validate with it — GPT, Claude, Gemini, Grok, DeepSeek, Mistral, Llama and more — all on TypingMind with your own API keys.

Is the Mermaid Validate AI skill free?

It is published on GitHub by diegomarino. Check the repository for licensing terms. You only pay your own AI provider for the tokens you use.

What are AI skills?

An AI skill is a reusable instruction bundle that teaches an AI model how to do one specific task. It follows the open Agent Skills format: a SKILL.md file with a name and description, plus any scripts, templates or reference files the model may need. The model reads the instructions only when your request matches the skill, so an installed skill costs nothing until it is used.

How are AI skills different from plugins or MCP servers?

A plugin or MCP server gives a model new tools to call — code that runs somewhere and returns a result. An AI skill gives the model knowledge and process instead: how to approach a task, which steps to follow, what good output looks like. Skills are plain Markdown, so they need no server, no API key and no runtime, and they work with any model.

Related AI Skills

View all
openclaw logo

Gemini

openclaw
OrganizationPopular

Gemini CLI one-shot prompts, summaries, generation, skills, hooks, MCP, or Gemma routing.

82.2K
391K
Instructions
View
obra logo

Writing Skills

obra
CommunityPopular

Use when creating new skills, editing existing skills, or verifying skills work before deployment

25.8K
288.1K
6 files
View
affaan-m logo

Skill Host Compat

affaan-m
CommunityPopular

Lint ECC skills for Codex/Cursor-safe frontmatter and Claude-only substitutions before a skill PR.

41.4K
277.3K
1 files
View
affaan-m logo

Brand Voice

affaan-m
CommunityPopular

Build a source-derived writing style profile from real posts, essays, launch notes, docs, or site copy, then reuse that profile across content, outreach, and social workflows. Use when the user wants…

40.4K
270.2K
2 files
View

Set up your own AI workspace now

Get notified about new features and future giveaways by subscribing to our newsletter 👇