Mermaid

Mermaid is an Automation skill for Claude Code, published by peintune in runjam.

195 stars12 forkson peintune/runjamAdded 2026/09/06+26% in starsRepository updated 2026/09/04

agentagent-managerai-agentai-codingclaude-codecodex-clicoding-assistantdesktop-appdeveloper-toolsgemini-clillmlocal-firstopen-sourcerustskilltaurivue3

Install in seconds

Install Mermaid

Copy Mermaid into your Claude Code skills folder. Run the command in your terminal, or review the source on GitHub before installing.

terminal

npx degit https://github.com/peintune/runjam/tree/main/src-tauri/builtin-skills/mermaid ~/.claude/skills/mermaid

Requires Node.js. Downloads this skill only — not the rest of the repository — into your Claude Code skills folder.

Without Node.js

git clone https://github.com/peintune/runjam.git

Clones the whole repository, then copy the skill’s own directory into your skills folder yourself.

In this catalog

Source file: src-tauri/builtin-skills/mermaid/SKILL.md in peintune/runjam
Installs to: ~/.claude/skills/mermaid
Collection: One of 13 skills cataloged from this repository
Category: Automation — 2032 skills

What Mermaid does

Mermaid renders Mermaid diagrams as SVG or ASCII art for flowcharts, sequence diagrams, state diagrams, class diagrams, and ER diagrams. Use it when you need to create or preview diagrams from Mermaid text.

Mermaid is cataloged under Automation on DirSkills. Mermaid comes from a repository tagged agent, agent-manager, ai-agent, ai-coding and claude-code.

Documentation

README

Excerpt

⚠️ Platform note — read before running any command. The shell snippets in this skill are written for macOS / Linux (bash/zsh). Always check which OS you are on first. On Windows do not run them verbatim — the underlying tool/CLI commands are usually cross-platform, but the surrounding shell syntax is not. Translate it to PowerShell before running:

bash (macOS / Linux) PowerShell (Windows)

a && b run as two steps, or a; if ($?) { b }

cat <<'EOF' | tool … (heredoc) write the text to a temp file, then pipe/pass that file to the tool

VAR=$(cmd) … $VAR $VAR = cmd … $VAR

cmd > /dev/null cmd > $null

… | grep PAT … | Select-String PAT

… | jq … … | ConvertFrom-Json, then read the fields

python3 x.py python x.py (or py x.py)

~/dir, /tmp $env:USERPROFILE\dir, $env:TEMP

cp / mkdir -p / rm -rf Copy-Item / New-Item -ItemType Directory -Force / Remove-Item -Recurse -Force

If a command has no obvious Windows equivalent, prefer the built-in file/HTTP tools over raw shell.

bash (macOS / Linux)	PowerShell (Windows)
`a && b`	run as two steps, or `a; if ($?) { b }`
`cat <<'EOF' \| tool …` (heredoc)	write the text to a temp file, then pipe/pass that file to the tool
`VAR=$(cmd)` … `$VAR`	`$VAR = cmd` … `$VAR`
`cmd > /dev/null`	`cmd > $null`
`… \| grep PAT`	`… \| Select-String PAT`
`… \| jq …`	`… \| ConvertFrom-Json`, then read the fields
`python3 x.py`	`python x.py` (or `py x.py`)
`~/dir`, `/tmp`	`$env:USERPROFILE\dir`, `$env:TEMP`
`cp` / `mkdir -p` / `rm -rf`	`Copy-Item` / `New-Item -ItemType Directory -Force` / `Remove-Item -Recurse -Force`

This is the opening of the README. Read the full README on GitHub.

Frequently asked about Mermaid

What else does peintune publish alongside Mermaid?
Mermaid is one of 13 skills that DirSkills catalogs from peintune/runjam, the repository it ships in. Its siblings there include Brainstorming, Code Review and Finishing A Development Branch. Each one is a separate skill with its own page in this directory, installs the same way Mermaid does, and is maintained by peintune in that same repository. The rest of the collection is listed on the peintune/runjam page.
How does Mermaid compare to other Automation skills?
Mermaid ranks #1809 by stars among the 2032 Automation skills in this catalog. The most-starred ones next to it are Autonomous Loops, Autonomous Agent Harness and Automation Audit Ops. DirSkills ranks by the star count of the repository each skill ships in, so that order reflects how popular those repositories are rather than any review of Mermaid against them. Open each page to compare what they document and how they install.