OSS
Show HN: Whiteboard (YC W26) is an MIT-licensed design IDE where coding agents draw architecture on a shared canvas
Whiteboard is a desktop app built on a vendored Code OSS fork. Agents such as Claude Code draw sequence and ER diagrams of their work on a canvas, and each diagram links to the code with LSP navigation. It also includes a Rust AST-aware semantic diff viewer and a decision log that links agent traces to requirements. The Show HN reached 332 points, and the repo has 924 stars and was pushed 2026-09-25. The project ships anonymous telemetry and plans a hosted team product.
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