excalidraw-presentation-generator

excalidraw-presentation-generator is a skill for Claude Code from Nikolahuang/nova-cli. It costs 97 tokens per session (1,772 once invoked), scanned A, original, MIT.

A skill for creating Excalidraw presentations and diagrams. Excalidraw is a drawing tool for making visual explanations, such as process flows, architecture diagrams, and teaching materials.

In plain words
What is it for?
Creating technical presentations, training materials, system architecture diagrams, process diagrams, and other visual explanations.
Why use it?
It helps turn technical ideas into structured visuals that can be explained in a short presentation. Its guidance covers layout, colour use, text hierarchy, and the required Excalidraw file format.

Skill for Claude Code

Written for Claude Code: allowed-tools in frontmatter.

Good fit Creating technical presentations, training materials, system architecture diagrams, process diagrams, and other visual explanations.

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Install with agentmods
npx agentmods add skills/nikolahuang/nova-cli/excalidraw-presentation-generator-1762840128318
Install

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.

Any agent
npx skills add Nikolahuang/nova-cli --skill excalidraw-presentation-generator-1762840128318
Clone the repo
git clone --depth 1 https://github.com/Nikolahuang/nova-cli

Made for: Claude Code.

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 excalidraw-presentation-generator

README.md
[![agentmods](https://agentmods.dev/badge/skills/nikolahuang/nova-cli/excalidraw-presentation-generator-1762840128318/github.svg)](https://agentmods.dev/skills/nikolahuang/nova-cli/excalidraw-presentation-generator-1762840128318)
Your own site
<a href="https://agentmods.dev/skills/nikolahuang/nova-cli/excalidraw-presentation-generator-1762840128318"><img src="https://agentmods.dev/badge/skills/nikolahuang/nova-cli/excalidraw-presentation-generator-1762840128318/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 excalidraw-presentation-generator

Your own site · 80×15
<a href="https://agentmods.dev/skills/nikolahuang/nova-cli/excalidraw-presentation-generator-1762840128318"><img src="https://agentmods.dev/badge/skills/nikolahuang/nova-cli/excalidraw-presentation-generator-1762840128318.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 97 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,772 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 $0.00097 $0.01772
Opus 5 $0.00048 $0.00886
Sonnet 5 $0.00019 $0.00354
Haiku 4.5 $0.00010 $0.00177

Measured 10d ago against content hash c191f7e36829, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-10, from the pricing page.

Security

Grade A, and why

excalidraw-presentation-generator 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 10d 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.

SkillsHub/excalidraw-presentation-generator-1762840128318/SKILL.md · 200 lines

How it starts

The opening of the file, as written. The whole thing — 200 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Excalidraw 演示文稿生成器

这个 Skill 帮助你创建专业的 Excalidraw 演示文稿,基于实战总结的最佳实践。

🎯 何时使用

  • 需要创建技术演示文稿
  • 制作教学材料或培训内容
  • 可视化复杂概念或流程
  • 创建架构图或系统设计图
  • 准备技术分享或讲座

📋 最佳实践总结

1. 视觉设计原则

颜色系统

  • 为不同主题使用一致的配色方案
  • 建议配色:
    • 蓝色系 (#1971c2, #e7f5ff) - 概念介绍
    • 绿色系 (#2f9e44, #d3f9d8) - 成功案例/推荐做法
    • 橙色系 (#f08c00, #fff4e6) - 重要提示/对比
    • 红色系 (#e03131, #ffe3e3) - 警告/避坑指南
    • 紫色系 (#7950f2, #f3f0ff) - 代码示例/技术细节

布局策略

  • 使用箭头连接逻辑流程
  • 左右分栏对比不同概念
  • 纵向滚动设计,便于逐步讲解
  • 每个概念用独立的矩形卡片包裹
  • 合理的间距:相关元素间距 20-50px,不同区块间距 80-150px

字体层次

  • 标题:48-56px(粗体)
  • 副标题/节标题:28-36px
  • 正文:18-24px
  • 代码/注释:14-18px(等宽字体 fontFamily: 3)

2. 内容组织

开场结构

  1. 吸引人的标题
  2. 副标题用类比或比喻
  3. 快速说明核心价值

主体内容

  • 概念解释 → 实战示例 → 最佳实践 → 总结
  • 每3-4个卡片后添加箭头过渡
  • 理论与实践平衡(建议 40% 理论 + 60% 实战)

实战示例格式

┌─────────────────┐  ┌──────────────────┐
│ 代码/配置       │  │ 效果/演示        │
│ (左侧灰色背景)  │  │ (右侧彩色背景)   │
└─────────────────┘  └──────────────────┘

3. Excalidraw JSON 规范

必需字段

{
  "type": "excalidraw",
  "version": 2,
  "source": "https://excalidraw.com",
  "elements": [...],
  "appState": {
    "gridSize": null,
    "viewBackgroundColor": "#ffffff"
  },
  "files": {}
}

元素通用字段

  • id: 唯一标识符
  • type: "text" | "rectangle" | "arrow" | "ellipse" 等
  • x, y: 坐标位置
  • width, height: 尺寸
  • strokeColor: 边框颜色
  • backgroundColor: 填充颜色
  • fontSize: 字体大小(仅文本)
  • fontFamily: 1=手写体, 3=等宽字体
  • roughness: 0=光滑, 1=手绘风格

4. 趣味性和可读性

使用 Emoji

  • 💡 概念/想法
  • 🚀 开始/行动
  • ⚡ 重点/对比
  • ✅ 推荐做法
  • ❌ 避免做法
  • 📝 示例
  • 🔍 详细说明
  • 🎯 目标/要点

信息密度

  • 5分钟讲解:约15-20个视觉元素
  • 10-15分钟讲解:约30-40个视觉元素
  • 每屏不超过3个主要概念

5. 常见模式

对比卡片

┌─────────────┐  ┌─────────────┐
│ ✅ 推荐     │  │ ❌ 不推荐   │
│ - 清晰      │  │ - 模糊      │
│ - 具体      │  │ - 宽泛      │
└─────────────┘  └─────────────┘

流程图

┌──────┐
│ 步骤1 │
└───┬──┘
    ↓
┌──────┐
│ 步骤2 │
└───┬──┘
    ↓
┌──────┐
│ 步骤3 │
└──────┘

代码展示

  • 使用灰色背景 (#f8f9fa)
  • 等宽字体 (fontFamily: 3)
  • 左侧展示代码,右侧展示效果

🔧 技术细节

坐标系统

  • 从左上角 (0, 0) 开始
  • 向右 x 增加,向下 y 增加
  • 建议起始坐标:x=100, y=50

Read the full file on GitHub · 200 lines

Files

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.

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. 10d ago First seen · 200 lines · 97 tokens per session scan A c191f7e36829

Subscribe to this mod's changes

excalidraw-presentation-generator is a skill published in the GitHub repository Nikolahuang/nova-cli (14 stars, last pushed 5mo ago), licensed MIT. It adds 97 tokens to every session and 1,772 once invoked, about $0.0005 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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