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Grok+17 agentsExcalidraw Sketcher
Use to produce hand-drawn style Excalidraw JSON diagrams for architectures, flows and sequences. Covers library elements, positioning, arrows, styling and PNG/S
Free
Excalidraw Sketcher
Example session with this skill installed
Create an Excalidraw diagram for a serverless API flow: Gateway to Lambda to DynamoDB. Use hachure fill for the DB and blue arrows.
- Read your context and instructions
- Compiled the excalidraw sketcher
{
"type": "excalidraw",
"version": 2,
"elements": [
{"type": "rectangle", "id": "gw", "x": 100, "y": 100, "width": 140, "height": 60, "strokeColor": "#1e1e1e"},
{"type": "arrow", "x": 240, "y": 130, "points": [[0,0], [100,0]], "strokeColor": "#1971c2", "startBinding": {"elementId": "gw"}}
]
}
Connects securely to your tools. The creator never sees your data.
About this skill
The problem
Standard architectural diagrams often look too rigid for early-stage docs, while manual whiteboarding is time-consuming to align and update. Generating structured, editable "hand-drawn" diagrams programmatically is difficult due to coordinate math and element binding requirements.
What it does
- Generates valid Excalidraw JSON files for system architectures, sequence diagrams, and UI wireframes.
- Calculates grid-based positioning and gutters to prevent overlapping elements automatically.
- Binds arrows to shapes using element IDs so connections persist when you move boxes in the editor.
- Applies customizable visual styles including hachure fills, roughness levels, and stroke weights.
- Includes headless export instructions for converting JSON to PNG or SVG via CLI.
Frameworks & tools
Excalidraw, JSON, jq, and excalidraw-cli for headless rendering.
Why this beats prompting it yourself
Generic LLM prompts often produce invalid JSON or messy, overlapping shapes without proper z-index or coordinate logic. This skill enforces specific grid math, label centering, and element binding, ensuring the output is actually usable in a whiteboard editor immediately.
Use cases
- Visualizing microservices architecture for engineering design docs.
- Creating sequence diagrams for complex authentication or data flows.
- Drafting low-fidelity UI wireframes for rapid prototyping feedback.
- Generating mind maps for brainstorming sessions that stay editable.
Known limitations
Not suitable for strict UML with exact class relations or statistical charts. Requires a JSON-compatible editor or the Excalidraw CLI for viewing and export.
How to install
Works the same in every agent - Claude, Cursor, Codex, Copilot and 20+ more.
- 1
Download the ZIP
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- 2
Unzip into your skills folder
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- 3
Ask your agent to use it
Restart the agent if it was already running. It picks the skill up automatically - no config needed.
Skills folder by agent
Click the path to copy it. Create the folder if it does not exist yet.
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