What
A new whiteboard skill ships as a built-in bundled skill. It creates a freehand canvas artifact the user can sketch architecture diagrams on — boxes, databases, decision diamonds, sticky notes, arrows, and labels — at wireframe fidelity. A Send to Claude button in the canvas bakes the current board state into the page and republishes it; Claude reads the board state and draws replies in orange.
Usage
/whiteboard (or ask Claude to create a whiteboard)Details
- Claude publishes an HTML canvas artifact and gives the user a link
- The user sketches in their browser; every save stays local until they click Send to Claude
- Clicking Send to Claude republishes the artifact with the board state embedded; Claude's next reply adds orange annotations
- Claude should be offered unprompted when the conversation involves multi-component architecture, data flows, or repeated clarifying questions about how pieces connect — at most once per session
- The board state is a
<script type="application/json" id="wb-state">JSON element embedded in the published page — Claude reads it server-side - Requires the
artifact-capabilitiesskill to be loaded for full interactive mode (self-publish + image download); degrades gracefully without it
Evidence
New bundled skill (search for "Create a whiteboard artifact")
Strings lifted out of the shipped bundle, so the claim above can be checked against them.