Claude Code mod
whiteboard
Claude draws Mermaid, D2 and PlantUML diagrams (UML, flowcharts, sequences, architecture) into a side pane with history, versions, export, copy and share.
Install
/plugin marketplace add kikostefanov-lab/claude-code-mods
/plugin install whiteboard@claude-code-modsMods install like plugins. Run /reload-plugins or start a new session to load it.
What it can access
- Reach
- L2Writes or runs: runs processes, writes files, drives Claude, writes the clipboard, reads files, reads env vars, reads mod state, persists state, draws
- Sees
- mcp__whiteboard__draw calls
- Draws in
Pane- Hooks
session.starttool.callcommand.runui.render
From a static scan of the mod's code by awesome-claude-code-mods. It shows what the code asks for, not a security review.
How Claude Code mods work
- A mod is a plugin with a JavaScript or TypeScript module that runs inside Claude Code (version 2.1.287 or later). It can draw panes beside the transcript, a band above the prompt, buttons and toasts, restyle the spinner and tool rows, and watch or rewrite tool calls and prompts.
- It installs like any plugin: add its marketplace with /plugin marketplace add owner/repo, then /plugin install name@marketplace.
- Check what a mod can reach before installing: it runs with your permissions. Reach goes from drawing only, to reading files, to writing files or running processes, to the network. Run claude plugin validate on a clone to list its hooks and calls without running it.
- Turn one off from the Installed tab in /plugin, or start Claude Code with --safe-mode to skip every customization for a session.
Details
- Repository
- kikostefanov-lab/claude-code-mods
- Folder
whiteboard- Marketplace
claude-code-mods- Author
- Kiko Stefanov
- License
- MIT
- Last updated
- 10 October 2026
- Listed in
- awesome-claude-code-mods
FAQ
What is whiteboard?
Claude draws Mermaid, D2 and PlantUML diagrams (UML, flowcharts, sequences, architecture) into a side pane with history, versions, export, copy and share. It is a mod for Claude Code, from kikostefanov-lab/claude-code-mods on GitHub.
What can the whiteboard mod access?
Its widest reach is "writes or runs" (runs processes, writes files, drives Claude, writes the clipboard, reads files, reads env vars, reads mod state, persists state, draws). It sees mcp__whiteboard__draw calls. It draws in Pane. Like any mod, it runs with your permissions.
How do I install whiteboard?
Inside Claude Code (v2.1.287 or later), run /plugin marketplace add kikostefanov-lab/claude-code-mods and then /plugin install whiteboard@claude-code-mods.
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