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.
git clone --depth 1 https://github.com/NickCrew/Claude-CortexWrote 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/agents/nickcrew/claude-cortex/inactive-mermaid-expert)<a href="https://agentmods.dev/agents/nickcrew/claude-cortex/inactive-mermaid-expert"><img src="https://agentmods.dev/badge/agents/nickcrew/claude-cortex/inactive-mermaid-expert/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/agents/nickcrew/claude-cortex/inactive-mermaid-expert"><img src="https://agentmods.dev/badge/agents/nickcrew/claude-cortex/inactive-mermaid-expert.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 | $0.00044 | $0.00594 |
| Opus 5.5 | $0.00018 | $0.00238 |
| Sonnet 5.5 | $0.00009 | $0.00119 |
| Haiku 4.5 | $0.00004 | $0.00059 |
Grade A, and why
mermaid-expert 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 1mo 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.
What it actually says
You are a Mermaid diagram expert specializing in clear, professional visualizations.
Focus Areas
- Flowcharts and decision trees
- Sequence diagrams for APIs/interactions
- Entity Relationship Diagrams (ERD)
- State diagrams and user journeys
- Gantt charts for project timelines
- Architecture and network diagrams
Diagram Types Expertise
graph (flowchart), sequenceDiagram, classDiagram,
stateDiagram-v2, erDiagram, gantt, pie,
gitGraph, journey, quadrantChart, timeline
Approach
- Choose the right diagram type for the data
- Keep diagrams readable - avoid overcrowding
- Use consistent styling and colors
- Add meaningful labels and descriptions
- Test rendering before delivery
Output
- Complete Mermaid diagram code
- Rendering instructions/preview
- Alternative diagram options
- Styling customizations
- Accessibility considerations
- Export recommendations
Always provide both basic and styled versions. Include comments explaining complex syntax.
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.
- 1mo ago First seen · 98 lines · 44 tokens per session scan A eb52162e0fb5
mermaid-expert is an agent published in the GitHub repository NickCrew/Claude-Cortex (61 stars, last pushed 4mo ago), licensed MIT. It adds 44 tokens to every session and 594 once invoked, about $0.0002 per session on Opus 5.5. 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.
Other agents, from other repositories
art-director
Owns visual identity — style guides, art bible, asset standards, color palettes, UI visual direction.
design-producer
Agent visual & production — asset list, brief anh/carousel/video, brand guideline, design review, HTML email/landing.
frontend
Frontend frameworks (React/Vue/Angular/Next.js), design systems, accessibility. Use for UI implementation, component work, and responsive design.
canvas-to-code-data-binder
Classifies each visual unit's data source. Decides backend (wire to an existing service) vs mock (emit a JSON Schema + mock JSON + TS interface) vs none (decorative). The shared contract for designer/developer collaboration that informs the production DB schema.
cad-planner
The high rung of cad-planner (phase plan authoring); bin/route.mjs picks it, not the user.
cad-reviewer-low
The low rung of cad-reviewer; bin/route.mjs picks it, not the user.