Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx skills add WH-2099/mermaid-skill --skill mermaidgit clone --depth 1 https://github.com/WH-2099/mermaid-skillWrote 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.
[](https://agentmods.dev/skills/wh-2099/mermaid-skill/mermaid)<a href="https://agentmods.dev/skills/wh-2099/mermaid-skill/mermaid"><img src="https://agentmods.dev/badge/skills/wh-2099/mermaid-skill/mermaid/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.
<a href="https://agentmods.dev/skills/wh-2099/mermaid-skill/mermaid"><img src="https://agentmods.dev/badge/skills/wh-2099/mermaid-skill/mermaid.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector pass
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.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00034 | $0.00868 |
| Opus 5 | $0.00017 | $0.00434 |
| Sonnet 5 | $0.00007 | $0.00174 |
| Haiku 4.5 | $0.00003 | $0.00087 |
Grade A, and why
mermaid 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 11d 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.
How it starts
The opening of the file, as written. The whole thing — 81 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Mermaid Diagram Generator
Generate high-quality Mermaid diagram code based on user requirements.
Workflow
- Understand Requirements: Analyze user description to determine the most suitable diagram type
- Read Documentation: Read the corresponding syntax reference for the diagram type
- Generate Code: Generate Mermaid code following the specification
- Apply Styling: Apply appropriate themes and style configurations
Diagram Type Reference
Select the appropriate diagram type and read the corresponding documentation:
| Type | Documentation | Use Cases |
|---|---|---|
| Flowchart | flowchart.md | Processes, decisions, steps |
| Sequence Diagram | sequenceDiagram.md | Interactions, messaging, API calls |
| Class Diagram | classDiagram.md | Class structure, inheritance, associations |
| State Diagram | stateDiagram.md | State machines, state transitions |
| ER Diagram | entityRelationshipDiagram.md | Database design, entity relationships |
| Gantt Chart | gantt.md | Project planning, timelines |
| Pie Chart | pie.md | Proportions, distributions |
| Mindmap | mindmap.md | Hierarchical structures, knowledge graphs |
| Timeline | timeline.md | Historical events, milestones |
| Git Graph | gitgraph.md | Branches, merges, versions |
| Quadrant Chart | quadrantChart.md | Four-quadrant analysis |
| Requirement Diagram | requirementDiagram.md | Requirements traceability |
| C4 Diagram | c4.md | System architecture (C4 model) |
| Sankey Diagram | sankey.md | Flow, conversions |
| XY Chart | xyChart.md | Line charts, bar charts |
| Block Diagram | block.md | System components, modules |
| Packet Diagram | packet.md | Network protocols, data structures |
| Kanban | kanban.md | Task management, workflows |
| Architecture Diagram | architecture.md | System architecture |
| Radar Chart | radar.md | Multi-dimensional comparison |
| Treemap | treemap.md | Hierarchical data visualization |
| User Journey | userJourney.md | User experience flows |
| ZenUML | zenuml.md | Sequence diagrams (code style) |
What ships with it
38 files 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.
- references/architecture.md 16 KB
- references/block.md 24 KB
- references/c4.md 31 KB
- references/classDiagram.md 28 KB
- references/config-configuration.md 2.2 KB
- references/config-directives.md 9.9 KB
- references/config-layouts.md 879 B
- references/config-math.md 3.5 KB
- references/config-theming.md 15 KB
- references/config-tidy-tree.md 1.6 KB
- references/cynefin.md 11 KB
- references/entityRelationshipDiagram.md 24 KB
- references/eventmodeling.md 11 KB
- references/examples.md 7.6 KB
- references/flowchart.md 55 KB
- references/gantt.md 31 KB
- references/gitgraph.md 51 KB
- references/ishikawa.md 1.7 KB
- references/kanban.md 6.0 KB
- references/mindmap.md 8.9 KB
- references/packet.md 3.8 KB
- references/pie.md 3.8 KB
- references/quadrantChart.md 12 KB
- references/radar.md 7.6 KB
- references/railroad.md 14 KB
- references/requirementDiagram.md 10 KB
- references/sankey.md 10 KB
- references/sequenceDiagram.md 33 KB
- references/stateDiagram.md 16 KB
- references/swimlanes.md 11 KB
- references/timeline.md 16 KB
- references/treemap.md 8.8 KB
- references/treeView.md 11 KB
- references/userJourney.md 1.2 KB
- references/venn.md 3.1 KB
- references/wardley.md 16 KB
- references/xyChart.md 14 KB
- references/zenuml.md 8.6 KB
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.
- 11d ago First seen · 81 lines · 34 tokens per session scan A 30ab197feb48
mermaid is a skill published in the GitHub repository WH-2099/mermaid-skill (277 stars, last pushed 1mo ago), licensed MIT. It adds 34 tokens to every session and 868 once invoked, about $0.0002 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 2026-08-30.
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