mermaid-jam

mermaid-jam is a skill for Claude Code, Codex from memi-design/design-skills. It costs 24 tokens per session (726 once invoked), scanned A, original, MIT.

A guide for turning Mermaid or Markdown diagram text into editable native diagrams in FigJam, Figma's collaborative whiteboard.

In plain words
What is it for?
Use it to create user flows, journey maps, information-architecture diagrams, evidence maps, or timelines from Mermaid or Markdown files.
Why use it?
It avoids rebuilding flows and maps manually when the source already exists as text.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

Needs its repository: it runs a file that does not travel with it, so clone the repository first. The line is memi mermaid-jam analyze ./docs/flow.md --json.

Good fit Use it to create user flows, journey maps, information-architecture diagrams, evidence maps, or timelines from Mermaid or Markdown files.

Compare 6 skills from other repositories ↓
Install

Getting it into your agent

It runs from inside its repository, so the clone comes first — what it calls does not travel with the file alone.

Clone the repo
git clone --depth 1 https://github.com/memi-design/design-skills
agentmods
npx agentmods add skills/memi-design/design-skills/mermaid-jam

Made for: Claude Code, Codex.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for mermaid-jam

README.md
[![agentmods](https://agentmods.dev/badge/skills/memi-design/design-skills/mermaid-jam/github.svg)](https://agentmods.dev/skills/memi-design/design-skills/mermaid-jam)
Your own site
<a href="https://agentmods.dev/skills/memi-design/design-skills/mermaid-jam"><img src="https://agentmods.dev/badge/skills/memi-design/design-skills/mermaid-jam/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for mermaid-jam

Your own site · 80×15
<a href="https://agentmods.dev/skills/memi-design/design-skills/mermaid-jam"><img src="https://agentmods.dev/badge/skills/memi-design/design-skills/mermaid-jam.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 24 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 726 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00024 $0.00726
Opus 5 $0.00012 $0.00363
Sonnet 5 $0.00005 $0.00145
Haiku 4.5 $0.00002 $0.00073

Measured 8d ago against content hash c513cf77f907, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-11, from the pricing page.

Security

Grade A, and why

mermaid-jam scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 8d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

skills/mermaid-jam/SKILL.md · 90 lines

How it starts

The opening of the file, as written. The whole thing — 90 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Mermaid Jam

Use this Note when a user asks to turn Mermaid markdown, fenced Mermaid blocks, or markdown user-flow notes into a FigJam diagram.

Use the research-vibe-design path when the source should come from Memoire research or Scenario Lab instead of hand-authored Mermaid. It generates Atomic Design specs, evidence maps, journey maps, IA flows, and optional simulation timelines before handing source to Mermaid Jam.

Native Route

  1. Run memi mermaid-jam status --json.
  2. If integration.local.ready is true, use the reported integration.local.manifestPath for local development import.
  3. If no local checkout is ready, use integration.communityUrl and open the Figma Community install page.
  4. Open the plugin from a FigJam board, not a Figma design file, then paste the Mermaid or markdown source into Mermaid Jam.

For Mémoire Studio on macOS, prefer the native corpus path before falling back to manual plugin paste:

memi mermaid-jam corpus sync --setup --json
memi mermaid-jam analyze ./docs/flow.md --json

Studio stores the reviewed markdown-only corpus in .memoire/markdown-corpus and can sync analyzed candidates through the connected FigJam bridge as editable FigJam nodes. The corpus downloader only stores .md, .mdx, .markdown, and .mdoc files from the allowlisted repos.

The manifest may be importable from Figma and FigJam, but generation is FigJam-native because the renderer creates FigJam sections, shape cards, and dynamic connectors.

Supported Inputs

  • Mermaid flowchart / graph
  • Mermaid journey
  • Mermaid sequenceDiagram
  • Mermaid stateDiagram / stateDiagram-v2
  • Mermaid mindmap
  • Mermaid timeline
  • Markdown headings and bullets describing a user flow
  • Markdown tables, frontmatter titles, links, and section hierarchy as scoring context for process, journey, timeline, API, architecture, and checklist flows

Local Development

When developing the plugin alongside Memoire, set:

export MEMOIRE_MERMAID_JAM_ROOT=/path/to/unicornjam

Read the full file on GitHub · 90 lines

Files

What ships with it

1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 8d ago First seen · 90 lines · 24 tokens per session scan A c513cf77f907

Subscribe to this mod's changes

mermaid-jam is a skill published in the GitHub repository memi-design/design-skills (7 stars, last pushed 1mo ago), licensed MIT. It adds 24 tokens to every session and 726 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-03.

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