// HACKER NEWS — CYBERSECURITY
Show HN: Whiteboard (YC W26) – An open-source IDE for thoughtful software design
Download for macOS ·
Download for Fedora ·
Website ·
Discord
Whiteboard is an open-source desktop app where humans and agents can architect software together in a common workspace.
Whiteboard plugs into the tools you already use - e.g. Claude Code, Codex, etc. – and gives your agent an SDK to draw on an in-app canvas to describe its work.
Here’s a 1 min demo video explaining more: https://www.youtube.com/watch?v=ChPn3ftULWE
In our experience, Whiteboard works best with models like GPT-6 Sol and Claude Opus 5.5 for their intelligence, cost, and speed tradeoff.
Here are a few example prompts of how to use Whiteboard effectively. We are working hard to make sure the right choices are baked in by default to the system prompt - part of why this system is open source! - but in the meantime:
hey, this stack of commits is set up so i can get an [api] to do [objective]
and then we can dive into implementation + explaining how things worked.
cna you explain to me the telemetry changes form the newest posthog pr https://github.com/devdotfast/whiteboard/commit/4837e107946e27ebad50c282eb0f2585210d2a35 -- what are we tracking, how can we build good dashboards or product waterfalls from it? what do we do for hangs, errors, crashes etc... use whiteboard
If you see anything you don't like, highlight it in your clipboard and give it your agent, and it can re-draw on the Whiteboard to suit your needs!