Radar / AI coding tools / Whiteboard
Whiteboard: open-source canvas IDE for human-agent software design
An open-source, MIT-licensed desktop app where humans and agents architect software together on a shared canvas. The agent gets an SDK to draw sequence diagrams, ER diagrams, decision logs, and code reviews; clicking a visualization jumps to the underlying code with full LSP support. Plugs into Claude Code, Codex, and other coding agents.
Why it matters
Fixes the actual bottleneck of agentic coding: understanding. Instead of scrolling 230-file agent diffs, the agent explains its design on a visual canvas with clickable diagrams, AST-aware semantic diffs, and a queryable decision log of its own autonomous choices.
What you could build with it
Hook your existing agent workflow into Whiteboard's SDK: after each agent session, have it draw its design decisions on the canvas and open a semantic diff review, turning every agent run into an inspectable design artifact.
Does it hold up?
Too early to judge: 774 stars and an active HN launch thread, but this is a v0 desktop app and real-world multi-agent session usage reports are still thin.
Built with Whiteboard
- Show HN threadhackernews · Launch HN thread with discussion from early users wiring Whiteboard into Claude Code/Codex flows.
- devdotfast/diffrgithub · 9 ★ · Sibling semantic-diff tool by the same author used inside Whiteboard reviews.
Learn more
First spotted on Hacker News: source.
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