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 tdimino/claude-code-minoan --skill beautiful-mermaidgit clone --depth 1 https://github.com/tdimino/claude-code-minoanWrote 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/tdimino/claude-code-minoan/beautiful-mermaid)<a href="https://agentmods.dev/skills/tdimino/claude-code-minoan/beautiful-mermaid"><img src="https://agentmods.dev/badge/skills/tdimino/claude-code-minoan/beautiful-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/tdimino/claude-code-minoan/beautiful-mermaid"><img src="https://agentmods.dev/badge/skills/tdimino/claude-code-minoan/beautiful-mermaid.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector warn
SkillSpector: 1 finding, up to medium
These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →
- medium Rogue Agent · line 63 Skill establishes unauthorized persistence across sessions via cron jobs, startup scripts, or state files. Session persistence allows an attacker to maintain access beyond the current interaction.Fix: Remove any persistence mechanisms (cron jobs, startup scripts, state files). Skills should not maintain state across sessions without explicit user consent.
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 | $0.00073 | $0.01282 |
| Opus 5 | $0.00036 | $0.00641 |
| Sonnet 5 | $0.00015 | $0.00256 |
| Haiku 4.5 | $0.00007 | $0.00128 |
Grade A, and why
beautiful-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 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.
How it starts
The opening of the file, as written. The whole thing — 130 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Beautiful Mermaid
Render Mermaid diagrams as ASCII/Unicode art (for terminal) or SVG (for files).
Quick Start
# Render ASCII diagram to terminal
node ~/.claude/skills/beautiful-mermaid/scripts/mermaid.mjs "graph LR; A-->B-->C"
# Output:
# ┌───┐ ┌───┐ ┌───┐
# │ A │────►│ B │────►│ C │
# └───┘ └───┘ └───┘
Usage
node ~/.claude/skills/beautiful-mermaid/scripts/mermaid.mjs [options] [input]
Options
| Option | Description |
|---|---|
-f, --format TYPE |
Output format: ascii (default) or svg |
-t, --theme NAME |
Theme for SVG output (default: zinc-dark) |
--colors JSON |
Custom colors as JSON: {"bg":"#hex","fg":"#hex","accent":"#hex","line":"#hex","muted":"#hex"}. Mutually exclusive with --theme. |
--transparent |
Transparent SVG background (for inlining into themed pages) |
-o, --output FILE |
Write to file instead of stdout |
--ascii |
Use pure ASCII instead of Unicode box-drawing |
--themes |
List available themes |
-h, --help |
Show help |
Input Sources
- Inline:
mermaid.mjs "graph TD; A-->B" - File:
mermaid.mjs diagram.mmd - Stdin:
echo "graph LR; A-->B" | mermaid.mjs -
Examples
ASCII Output (Terminal)
# Flowchart with Unicode box-drawing (default)
node ~/.claude/skills/beautiful-mermaid/scripts/mermaid.mjs "graph TD; Start-->Process-->End"
# Pure ASCII for maximum compatibility
node ~/.claude/skills/beautiful-mermaid/scripts/mermaid.mjs --ascii "graph LR; A-->B"
SVG Output (Files)
# Create SVG with tokyo-night theme
node ~/.claude/skills/beautiful-mermaid/scripts/mermaid.mjs -f svg -t tokyo-night "graph TD; A-->B" -o diagram.svg
# Sequence diagram
node ~/.claude/skills/beautiful-mermaid/scripts/mermaid.mjs -f svg -t catppuccin-mocha "sequenceDiagram
Alice->>Bob: Hello
Bob-->>Alice: Hi!" -o sequence.svg
Supported Diagram Types
| Type | Syntax |
|---|---|
| Flowchart | graph TD/LR/BT/RL or flowchart TD/LR/BT/RL |
| State | stateDiagram-v2 |
| Sequence | sequenceDiagram |
| Class | classDiagram |
| ER | erDiagram |
What ships with it
4 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.
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.
- 8d ago First seen · 130 lines · 73 tokens per session scan A 12fbc682b455
beautiful-mermaid is a skill published in the GitHub repository tdimino/claude-code-minoan (41 stars, last pushed yesterday), licensed MIT. It adds 73 tokens to every session and 1,282 once invoked, about $0.0004 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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