napkin SKILL.md skillA
napkin from marielynneblock/arcanum-artifex is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add marielynneblock/arcanum-artifex/napkin@git:20260710.0115f49Pins git:20260710.0115f49 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- marielynneblock/arcanum-artifex
- Path
skills/document-production/diagramming/napkin/SKILL.md- Versions recorded
- 4
- Latest version
- git:20260710.0115f49, committed Jul 10, 2026
- First version recorded
- May 10, 2026
- Size
- 7,221 bytes
- Repository stars
- 4
- License
- none declared
Visual whiteboard collaboration for Copilot CLI. Creates an interactive whiteboard that opens in your browser — draw, sketch, add sticky notes, then share everything back with Copilot. Copilot sees your drawings and text, and responds with analysis, suggestions, and ideas.
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# Napkin — Visual Whiteboard for Copilot CLI Napkin gives users a browser-based whiteboard where they can draw, sketch, and add sticky notes to think through ideas visually. The agent reads back the whiteboard contents (via a PNG snapshot and optional JSON data) and responds conversationally with analysis, suggestions, and next steps. The target audience is lawyers, PMs, and business stakeholders — not software developers. Keep everything approachable and jargon-free. --- ## Activation When the user invokes this skill — saying things like "let's napkin," "open a napkin," "start a whiteboard," or using the slash command — do the following: 1. **Copy the bundled HTML template** from the skill assets to the user's Desktop. - The template lives at `assets/napkin.html` relative to this SKILL.md file. - Copy it to `~/Desktop/napkin.html`. - If `~/Desktop/napkin.html` already exists, ask the user whether they want to open the existing one or start fresh before overwriting. 2. **Open it in the default browser:** - macOS: `open ~/Desktop/napkin.html` - Linux: `xdg-open ~/Desktop/napkin.html` - Windows: `start ~/Desktop/napkin.html` …
Read the whole file at its exact version.
How to install
mdr add marielynneblock/arcanum-artifex/napkin@sha256:9dd3b79fcbbd7a24The line at the top of this page pins the label git:20260710.0115f49, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_nfykvezad2orig6s)
3 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 4 versions of this file, between May 10, 2026 and Jul 10, 2026, about one every 20 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20260710.0115f49 latest | 2026-07-10 | 0115f49 | 7,221 B | A | view · diff |
| git:20260710.ffb3400 | 2026-07-10 | ffb3400 | 7,219 B | A | view · diff |
| git:20260515.b861afb | 2026-05-15 | b861afb | 7,219 B | A | view · diff |
| git:20260510.f26bcec | 2026-05-10 | f26bcec | 7,173 B | A | view |
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (7221 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
marielynneblock/arcanum-artifex · 4 stars · license none declared · pushed 2026-09-19 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_nfykvezad2orig6s GET https://markdownregistry.com/api/v1/resolve?ref=marielynneblock/arcanum-artifex/napkin GET https://markdownregistry.com/api/v1/blob/9dd3b79fcbbd7a2434ed685d00fa2bcf5189188568ab8520eab8334a22f9158a
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.
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