Whiteboard for Claude Code

What it is

An open-source live whiteboard: Claude Code writes cards (Mermaid diagrams, ECharts plots including 3D, three.js scenes, KaTeX math, code) into a folder, and a browser page redraws within about a quarter second. User and memory files let the model resume where a session left off.

The problem

Chat transcripts are a poor surface for diagrams, math and 3D; you scroll back to find the visual from ten messages ago.

How it works

1. Zero-dependency Python server watches boards/ and pushes changes over SSE
2. Vanilla-JS rendering engine morphs only what changed, preserving scroll, zoom and running 3D scenes
3. CLAUDE.md operating manual tells the model to draw on the board instead of answering in chat
4. user.md and memory.md give the model learner context and session continuity; three example boards ship as tabs

Stack

Disciplines

For your business

Custom Claude Code workspaces and visual interfaces that turn agent output into something a team can read.