Gives coding agents like Claude Code and Codex a desktop canvas to draw code reviews, diagrams, and decision logs linked to the code, via a local CLI and MCP server.
Use it now
Keep it with up to 9 other tools you're setting up, then share them all as one link.
Try this first
Ask your assistant, with Whiteboard connected:
- Scratchpad Diagrams
Use Whiteboard to draw sequence diagrams, flow diagrams, call trees, and code peeks: ‹what you need›
- Trace Archaeology
Use Whiteboard to resolve Agent-Session commit trailers: ‹what you need›
- Semantic Diff Viewer
Use Whiteboard to show AST-aware diffs: ‹what you need›
Connect it over MCP
Connect Whiteboard as an MCP server, following its setup instructions at https://github.com/devdotfast/whiteboard
Its page: github.com/devdotfast/whiteboard
Install the CLI
Install it as its own instructions say.
Its page: github.com/devdotfast/whiteboard
Compare
Press Compare to add it to the tray at the bottom of the window, then pick up to 2 others anywhere on the site.
- Access
- CLIMCP
- Auth
- None
- Skills
- 4
Skills
Review Authoring
Authors RFC-style Whiteboards for branches, commits, and pull requests with what/why, design, and implementation sections and diagrams.
Scratchpad Diagrams
Draws sequence diagrams, flow diagrams, call trees, and code peeks on a persistent scratchpad to explain code visually during a chat.
Trace Archaeology
Resolves Agent-Session commit trailers and pulls past agent sessions with the whiteboard trace CLI to explain why code exists.
Semantic Diff Viewer
Shows AST-aware diffs that summarize large added functions as pseudocode and collapse tests and docs, customizable with WASM plugins.
