Show HN: Whiteboard (YC W26) – An open-source IDE for thoughtful software design
Whiteboard gives coding agents a shared canvas, tied back to local code, for explaining architecture and review decisions.
The app connects to tools like Claude Code and Codex and lets agents draw diagrams inside Whiteboard. Its views can link sequence diagrams, ERDs, and trace quotes back to the relevant code. It also includes a Rust-based semantic diff viewer and an agent decision log. The project is MIT-licensed, local-first, and cannot currently edit files directly. HN · GitHub AI's note
The app connects to tools like Claude Code and Codex and lets agents draw diagrams inside Whiteboard. Its views can link sequence diagrams, ERDs, and trace quotes back to the relevant code. It also includes a Rust-based semantic diff viewer and an agent decision log. The project is MIT-licensed, local-first, and cannot currently edit files directly. HN · GitHub AI's note
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