Agent skill

Mermaid Diagram

by AI4Scientist in AI4Scientist/nano-scientist

Generate Mermaid diagrams from user requirements. An agent skill from AI4Scientist/nano-scientist.

No licenceAuto-check passedDevelopment

Install Mermaid Diagram

skills CLI
$ npx skills add AI4Scientist/nano-scientist --skill mermaid-diagram -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI
$ gh skill install AI4Scientist/nano-scientist mermaid-diagram --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy
$ git clone --depth 1 https://github.com/AI4Scientist/nano-scientist.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/skills-codex/mermaid-diagram .claude/skills/mermaid-diagram && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Facts

Skill name
mermaid-diagram
GitHub stars
128
Used in
3 other repos
Token cost
~2.9k tokens
SKILL.md length
1,025 words
Files
1
Skills in repo
74
Repo updated
First seen
Licence
None found

At a glance

Generate Mermaid diagrams from user requirements. An agent skill from AI4Scientist/nano-scientist.

  • Works in 7 steps: Pre-flight Check → Understand Requirements & Select Diagram… → Read Documentation → …
  • Tasks that involve Diagrams
  • SKILL.md covers Constants, Workflow: MUST EXECUTE ALL STEPS, Architecture Diagram Best… and CVPR/ICLR/NeurIPS Style Guide…, plus 1 more section
  • Calls npx

What it does

Mermaid Diagram is an agent skill from AI4Scientist/nano-scientist. Generate Mermaid diagrams from user requirements. Save .mmd and .md files to figures/ with syntax verification. Supports flowcharts, sequence diagrams, class diagrams, ER diagrams, Gantt charts, and many more diagram types.

Its SKILL.md is about 2.9k tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.

It sits in Development, covering Diagrams. It works with Mermaid. The repository describes itself as: An autonomous research agent that turns a topic into a peer-reviewed technical report.

When your agent uses it

  • Tasks that involve Diagrams

Example prompts

  • “/mermaid-diagram”

Requirements

  • Node.js

Workflow steps

7 steps, taken from the step headings in SKILL.md.

  1. Pre-flight Check
  2. Understand Requirements & Select Diagram Type
  3. Read Documentation
  4. Generate Mermaid Code & Save Files
  5. Verify Mermaid Syntax (MANDATORY)
  6. Codex STRICT Visual Review & Scoring (MANDATORY)
  7. Final Output Summary

What it can do on your machine

Read from SKILL.md and the folder at commit 7132192. It shows what the files ask for, not the result of running them.

  • Tool permissions

    Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.

    From allowed-tools in the SKILL.md frontmatter.

  • Runs code

    Shell commands in SKILL.md call:

    • npx

    From the folder's file list and the shell code blocks in SKILL.md.

  • Network

    No URLs in SKILL.md. Its commands use npx, which can reach the network depending on how they are called.

    From URLs in SKILL.md, links to its own repository left out.

  • Credentials

    Names no API keys, tokens, secrets or passwords.

    From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Mermaid Diagram loads about 2.9k tokens when it runs. Until then it costs about 60 tokens; SKILL.md has 1,025 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~60
When it runs · the whole SKILL.md, loaded when a task matches
~2.9k

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check passed

The automated check found no risky patterns in SKILL.md.

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

Without a licence we can't republish the file, so here is its outline and opening line. It has 1,025 words (~2,932 tokens).

“Generate high-quality Mermaid diagram code based on user requirements, with file output and verification.”

— opening of SKILL.md by AI4Scientist
name
mermaid-diagram

Read the full SKILL.md on GitHub

Files

Just SKILL.md in skills/skills-codex/mermaid-diagram of AI4Scientist/nano-scientist.

Open the folder on GitHubat commit 7132192

Used in 3 other repositories

We found 5 copies of this SKILL.md (exact, near-identical or edited) in other folders, from 3 other GitHub owners. This page covers the copy in AI4Scientist/nano-scientist, which our catalogue first saw on October 7, 2026.

Compare with similar skills

Mermaid Diagram next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

Mermaid Diagram compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Mermaid Diagram this skillAI4Scientist/nano-scientist1283 repos~2.9kAutomated safety check: PassNone
Archify Diagramstt-a1i/archify82k—~2.9kAutomated safety check: PassMIT
Diagram Designcathrynlavery/diagram-design49k1 repos~7.6kAutomated safety check: PassMIT
Draw.io Diagram StudioAgents365-ai/drawio-skill10k—~2.4kAutomated safety check: NotesMIT
Pretty Mermaid Rendererimxv/Pretty-mermaid-skills1.5k—~2kAutomated safety check: PassMIT
Archify Diagram BuilderUnclecheng-li/AI_Animation1.5k2 repos~4.1kAutomated safety check: PassMIT

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Works with

Categories

Questions about Mermaid Diagram

What does Mermaid Diagram do?

Generate Mermaid diagrams from user requirements. An agent skill from AI4Scientist/nano-scientist. Mermaid Diagram is an agent skill from AI4Scientist/nano-scientist. Generate Mermaid diagrams from user requirements.

When should I use Mermaid Diagram?

Mermaid Diagram fits situations like: tasks that involve Diagrams.

How do I install Mermaid Diagram in Claude Code?

Run `npx skills add AI4Scientist/nano-scientist --skill mermaid-diagram -a claude-code`. Or copy the skill folder (skills/skills-codex/mermaid-diagram in AI4Scientist/nano-scientist) into .claude/skills/mermaid-diagram in your project. Claude Code loads it when a task matches its description.

How do I install Mermaid Diagram in Codex?

Run `npx skills add AI4Scientist/nano-scientist --skill mermaid-diagram -a codex`. Or copy the skill folder (skills/skills-codex/mermaid-diagram in AI4Scientist/nano-scientist) into .agents/skills/mermaid-diagram in your project. Codex loads it when a task matches its description.

Can I use Mermaid Diagram in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add AI4Scientist/nano-scientist --skill mermaid-diagram -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/mermaid-diagram, .gemini/skills/mermaid-diagram, .github/skills/mermaid-diagram and .opencode/skills/mermaid-diagram in your project.

What does Mermaid Diagram need to run?

Going by SKILL.md and its folder, Mermaid Diagram needs the command-line tools its instructions call (npx). Our summary lists: Node.js.

Does Mermaid Diagram access the network?

SKILL.md contains no URLs. Its commands use npx, which can reach the network depending on how they are called. This is read from the text; nothing was executed.

Is Mermaid Diagram safe to install?

Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.

What licence does Mermaid Diagram use?

No licence was found for Mermaid Diagram or its repository. Without one, default copyright applies: ask the author before reusing or redistributing it.

How many tokens does Mermaid Diagram use?

About 2.9k tokens (SKILL.md is roughly 12k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.

What are the alternatives to Mermaid Diagram?

Skills that share tags, products or a category with Mermaid Diagram: Archify Diagrams (tt-a1i/archify, 82k stars), Diagram Design (cathrynlavery/diagram-design, 49k stars), Draw.io Diagram Studio (Agents365-ai/drawio-skill, 10k stars) and Pretty Mermaid Renderer (imxv/Pretty-mermaid-skills, 1.5k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Mermaid Diagram?

AI4Scientist (a GitHub organization) maintains it in AI4Scientist/nano-scientist, which has 128 GitHub stars. The repository holds 74 skills in this directory. The repository was last updated on June 3, 2026.

Source: AI4Scientist/nano-scientist on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.