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 BitYoungjae/marketplace --skill mermaid-diagramminggit clone --depth 1 https://github.com/BitYoungjae/marketplaceWrote 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/bityoungjae/marketplace/mermaid-diagramming)<a href="https://agentmods.dev/skills/bityoungjae/marketplace/mermaid-diagramming"><img src="https://agentmods.dev/badge/skills/bityoungjae/marketplace/mermaid-diagramming/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/bityoungjae/marketplace/mermaid-diagramming"><img src="https://agentmods.dev/badge/skills/bityoungjae/marketplace/mermaid-diagramming.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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 | $0.00047 | $0.03248 |
| Opus 5 | $0.00023 | $0.01624 |
| Sonnet 5 | $0.00009 | $0.00650 |
| Haiku 4.5 | $0.00005 | $0.00325 |
Grade A, and why
mermaid-diagramming 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 12d 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 — 471 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Mermaid Diagramming in Obsidian
Obsidian has built-in Mermaid support. Use fenced code blocks with mermaid language identifier.
For common syntax (styling, comments, themes), see reference.md.
⚠️ Obsidian-Specific Constraints
Rendering Differences: Obsidian's Mermaid version may lag behind mermaid.js releases. Some cutting-edge features may not work.
Theme Interaction: Diagram colors adapt to Obsidian theme. Use explicit styles for consistent appearance across themes.
Performance: Very large diagrams (50+ nodes) may slow down rendering. Split into multiple diagrams if needed.
Export: PDF export converts diagrams to images. For external sharing, capture as PNG/SVG.
No JavaScript: Click events and JavaScript callbacks are disabled for security.
Diagram Selection Guide
| Use Case | Diagram Type | Keyword |
|---|---|---|
| Process flow, decision trees | Flowchart | flowchart |
| API calls, message passing | Sequence | sequenceDiagram |
| OOP design, relationships | Class | classDiagram |
| Project timeline, scheduling | Gantt | gantt |
| State machine, lifecycle | State | stateDiagram-v2 |
| Git branching strategy | Gitgraph | gitGraph |
| Brainstorming, hierarchies | Mindmap | mindmap |
| Proportions, percentages | Pie Chart | pie |
| Database schema, entities | ER Diagram | erDiagram |
| User experience steps, satisfaction | User Journey | journey |
| Historical events, milestones | Timeline | timeline |
| Priority matrix, 2D positioning | Quadrant Chart | quadrantChart |
| Flow visualization, proportional bands | Sankey Diagram | sankey-beta |
| Numerical data visualization | XY Chart | xychart-beta |
| Precise element positioning, layouts | Block Diagram | block-beta |
| Cloud services, service relationships | Architecture | architecture-beta |
Quick Start Examples
Flowchart
flowchart TD
A[Start] --> B{Decision}
B -->|Yes| C[Action 1]
B -->|No| D[Action 2]
C --> E[End]
D --> E
What ships with it
17 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.
- architecture.md 9.9 KB
- block.md 10 KB
- class-diagram.md 13 KB
- er-diagram.md 10 KB
- flowchart.md 8.9 KB
- gantt.md 12 KB
- gitgraph.md 6.4 KB
- journey.md 8.1 KB
- mindmap.md 3.8 KB
- pie.md 2.5 KB
- quadrant-chart.md 8.6 KB
- reference.md 9.9 KB
- sankey.md 7.8 KB
- sequence.md 13 KB
- state.md 13 KB
- timeline.md 9.8 KB
- xychart.md 8.1 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.
- 12d ago First seen · 471 lines · 47 tokens per session scan A 11b743190c4d
mermaid-diagramming is a skill published in the GitHub repository BitYoungjae/marketplace (6 stars, last pushed 3mo ago), licensed MIT. It adds 47 tokens to every session and 3,248 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 2026-08-31.
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