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 sethyuan/orcanote-agent-skills --skill orcanote-whiteboardgit clone --depth 1 https://github.com/sethyuan/orcanote-agent-skillsWrote 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/sethyuan/orcanote-agent-skills/orcanote-whiteboard)<a href="https://agentmods.dev/skills/sethyuan/orcanote-agent-skills/orcanote-whiteboard"><img src="https://agentmods.dev/badge/skills/sethyuan/orcanote-agent-skills/orcanote-whiteboard/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/sethyuan/orcanote-agent-skills/orcanote-whiteboard"><img src="https://agentmods.dev/badge/skills/sethyuan/orcanote-agent-skills/orcanote-whiteboard.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 | $0.00033 | $0.03571 |
| Opus 5 | $0.00016 | $0.01785 |
| Sonnet 5 | $0.00007 | $0.00714 |
| Haiku 4.5 | $0.00003 | $0.00357 |
Grade A, and why
orcanote-whiteboard 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 12d 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 — 264 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Orca Note Whiteboard (Excalidraw)
This skill provides the syntax, structural rules, and design principles for creating semantically rich and visually appealing whiteboards in Orca Note using the Excalidraw JSON format.
Excalidraw JSON Schema
Whiteboards are defined within whiteboard code blocks.
Core Structure
{
"elements": [],
"files": {}
}
Common Element Types
| Type | Description | Key Fields |
|---|---|---|
rectangle |
Standard rectangle | x, y, width, height, strokeColor, backgroundColor, roundness, boundElements |
ellipse |
Circle or oval | x, y, width, height, strokeColor, backgroundColor, boundElements |
arrow |
Line or connector | points (relative to x,y), startArrowhead, endArrowhead, startBinding, endBinding, elbowed (true for elbow arrows) |
line |
Simple line | points |
text |
Text label | text, fontSize, fontFamily (5: Hand-drawn, 6: Sans, 8: Monospace), containerId (ID of the shape this text belongs to), x, y, width, height, strokeColor, backgroundColor, textAlign, verticalAlign |
embeddable |
Embedded Orca Note block | customData: { "blockId": "ID" }, x, y, width, height, strokeColor, backgroundColor, roundness |
Labeling Shapes with Text
To place text inside a shape (like a rectangle or ellipse):
- Create the Shape: Give it a unique
id. - Create a Text Element:
- Set its
containerIdto the shape'sid. - Set
xandyto the container'sxandy. - Set
widthandheightto fit within the shape's dimensions. - Set
textAlignandverticalAlignto center the text.
- Set its
- Link back: Add the text element's ID to the shape's
boundElementsarray:{ "type": "text", "id": "text_id" }.
Arrow Types
- Straight Arrow: Standard line. No
elbowedfield. - Elbow Arrow: Set
elbowed: true. This creates a right-angled connector.
Arrowheads (startArrowhead / endArrowhead)
null: No arrowhead."arrow","bar","dot","triangle".
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.
- 12d ago First seen · 264 lines · 33 tokens per session scan A 8e68bcba306e
orcanote-whiteboard is a skill published in the GitHub repository sethyuan/orcanote-agent-skills (5 stars, last pushed 4mo ago), licensed MIT. It adds 33 tokens to every session and 3,571 once invoked, about $0.0002 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 2026-08-31.
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