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Generate hand-drawn style Excalidraw diagrams from text descriptions
Passed 20 of 23 test cases with the skill, and 14 of 23 without it.
and 7 more in the full report
6 fixed14 passed either way3 still failing0 broke
Tokens, turns and time describe resource use, not a dollar price.
One of 6 test cases the skill fixed. Same model, same prompt, with and without the skill.
In an Excalidraw research pipeline diagram, what stroke hex color code is recommended by the academic color palette to highlight warning steps or alerts?
| Checked | Without skill | With skill |
|---|---|---|
| Sets strokeColor to #f08c00. | Missed | Passed |
The instructions your model reads when the skill loads.
Generate hand-drawn style diagrams, wireframes, and visual explanations using Excalidraw's open-source whiteboard format. This skill enables researchers to create informal yet informative sketches for brainstorming sessions, presentations, and collaborative workshops.
Excalidraw is an open-source virtual whiteboard tool that produces diagrams with a distinctive hand-drawn aesthetic. Unlike formal diagramming tools such as PlantUML or Visio, Excalidraw prioritizes approachability and rapid ideation. Its output looks intentionally informal, which makes it well-suited for early-stage research brainstorming, teaching materials, and conference posters where a polished UML diagram would feel overly rigid.
The tool stores diagrams in a JSON-based .excalidraw format, making them fully version-controllable and programmatically generatable. Researchers can describe what they need in natural language, and this skill translates those descriptions into valid Excalidraw scene files that can be opened in the Excalidraw editor or embedded directly into web pages.
Excalidraw supports real-time collaboration, end-to-end encryption for shared sessions, and export to PNG and SVG. The hand-drawn style is achieved through a custom rendering engine that applies subtle randomization to stroke paths, giving each element a natural, sketched appearance.
The Excalidraw JSON format consists of an array of elements, each with a type (rectangle, ellipse, arrow, text, line, diamond), position coordinates, dimensions, and style properties.
{
"type": "rectangle",
"x": 100,
"y": 200,
"width": 200,
"height": 80,
"strokeColor": "#1e1e1e",
"backgroundColor": "#a5d8ff",
"fillStyle": "hachure",
"strokeWidth": 1,
"roughness": 1,
"roundness": { "type": 3 }
}
| Property | Values | Description |
|---|---|---|
fillStyle | hachure, cross-hatch, solid | Fill pattern style |
roughness | 0, 1, 2 | Hand-drawn roughness level |
test cases passed, vs 14 / 23 without
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