How do I get started with gr-whiteboard?

Tell Claude Code (or the Code tab in Claude Desktop) to use the GitHub repo, and Claude will install Node.js or Git via winget if they are missing. After a restart, a board opens in the browser; on a clean Windows machine it took about 15 minutes.

Is it stable enough for daily use?

It is an alpha release (0.7.3); the author uses it every day but says things may change before 1.0. An internet connection is required because the page loads Excalidraw, React and Mermaid from esm.sh.

What happens if I leave the board idle?

If untouched for one hour, the board is exported to a .excalidraw file and the server stops, with a warning five minutes beforehand.

Large Language ModelsAI Coding AssistantsOpen-Source AIZenn AI/ML7h agoNov 2, 2026, 06:00 JST

gr-whiteboard: Claude Code plugin for whiteboard chat

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3 Key Points

What happened
GoodRelax released gr-whiteboard (GRWB), an Apache-2.0 alpha (0.7.3) Claude Code plugin; a local whiteboard server lets Claude read board content and answer in blue text right below it.
Why it matters
The reply lands directly under what was written, chat-style, so a discussion on the board can proceed without switching to a separate chat window—an unusual way to work with Claude Code, though it is still alpha software.

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Context & Analysis

GRWB is built on Excalidraw, the open-source drawing tool, and GoodRelax describes it as an unofficial tool rather than an Excalidraw product. The plugin's scope is deliberately local: the whiteboard server runs on a local PC, and the author notes that discussions in GRWB reach at most as far as the LAN, pointing readers to the original excalidraw.com for whiteboard discussions with engineers worldwide.

A few practical constraints shape how it can be used. The page pulls Excalidraw, React and Mermaid from esm.sh, so an internet connection is required. The board link itself acts as the key—whoever holds the link can view, edit and talk to Claude—so sharing it is a deliberate act. The author lists testing only on Windows 11 Edge and iPad/iPhone Safari, and flags that environment differences may cause failures.

The project has a self-referential twist: the author says the specification and implementation of the plugin were worked out on the whiteboard itself in conversation with Claude Code. GRWB was released as an alpha in part to gather user feedback for the next step, with requests directed to GitHub Issues.

FAQ

How do I get started with gr-whiteboard?: Tell Claude Code (or the Code tab in Claude Desktop) to use the GitHub repo, and Claude will install Node.js or Git via winget if they are missing. After a restart, a board opens in the browser; on a clean Windows machine it took about 15 minutes.
Is it stable enough for daily use?: It is an alpha release (0.7.3); the author uses it every day but says things may change before 1.0. An internet connection is required because the page loads Excalidraw, React and Mermaid from esm.sh.
What happens if I leave the board idle?: If untouched for one hour, the board is exported to a .excalidraw file and the server stops, with a warning five minutes beforehand.

Zenn AI/MLRead Original Article

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